content: /*
   * A modified version of the Android AbsListView
   *
   * Copyright 2012 Jess Anders
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-	2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  /*
   * Copyright (C) 2006 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.jess.ui;
  
  
  import java.util.ArrayList;
  import java.util.List;
  
  import android.content.Context;
  import android.content.res.Configuration;
  import android.content.res.TypedArray;
  import android.graphics.Canvas;
  import android.graphics.Rect;
  import android.graphics.drawable.Drawable;
  import android.graphics.drawable.TransitionDrawable;
  import android.os.Debug;
  import android.os.Handler;
  import android.os.Parcel;
  import android.os.Parcelable;
  import android.util.AttributeSet;
  import android.util.Log;
  import android.view.HapticFeedbackConstants;
  import android.view.KeyEvent;
  import android.view.MotionEvent;
  import android.view.VelocityTracker;
  import android.view.View;
  import android.view.ViewConfiguration;
  import android.view.ViewDebug;
  import android.view.ViewGroup;
  import android.view.ViewTreeObserver;
  import android.view.ContextMenu.ContextMenuInfo;
  import android.widget.Adapter;
  import android.widget.EditText;
  import android.widget.ListAdapter;
  import android.widget.Scroller;
  
  import com.amirarcane.recentimages.R;
  
  /**
   * Base class that can be used to implement virtualized lists of items. A list does
   * not have a spatial definition here. For instance, subclases of this class can
   * display the content of the list in a grid, in a carousel, as stack, etc.
   *
   * @attr ref android.R.styleable#JessAbsListView_listSelector
   * @attr ref android.R.styleable#JessAbsListView_drawSelectorOnTop
   * @attr ref android.R.styleable#JessAbsListView_stackFromBottom
   * @attr ref android.R.styleable#JessAbsListView_scrollingCache
   * @attr ref android.R.styleable#JessAbsListView_textFilterEnabled
   * @attr ref android.R.styleable#JessAbsListView_transcriptMode
   * @attr ref android.R.styleable#JessAbsListView_cacheColorHint
   * @attr ref android.R.styleable#JessAbsListView_smoothScrollbar
   */
  public abstract class TwoWayAbsListView extends TwoWayAdapterView<ListAdapter> implements
  ViewTreeObserver.OnTouchModeChangeListener {
  	private static final String TAG = "TwoWayAbsListView";
  	private static final boolean DEBUG = false;
  
  
  	/**
  	 * Disables the transcript mode.
  	 *
  	 * @see #setTranscriptMode(int)
  	 */
  	public static final int TRANSCRIPT_MODE_DISABLED = 0;
  	/**
  	 * The list will automatically scroll to the bottom when a data set change
  	 * notification is received and only if the last item is already visible
  	 * on screen.
  	 *
  	 * @see #setTranscriptMode(int)
  	 */
  	public static final int TRANSCRIPT_MODE_NORMAL = 1;
  	/**
  	 * The list will automatically scroll to the bottom, no matter what items
  	 * are currently visible.
  	 *
  	 * @see #setTranscriptMode(int)
  	 */
  	public static final int TRANSCRIPT_MODE_ALWAYS_SCROLL = 2;
  
  	/**
  	 * Indicates that we are not in the middle of a touch gesture
  	 */
  	static final int TOUCH_MODE_REST = -1;
  
  	/**
  	 * Indicates we just received the touch event and we are waiting to see if the it is a tap or a
  	 * scroll gesture.
  	 */
  	static final int TOUCH_MODE_DOWN = 0;
  
  	/**
  	 * Indicates the touch has been recognized as a tap and we are now waiting to see if the touch
  	 * is a longpress
  	 */
  	static final int TOUCH_MODE_TAP = 1;
  
  	/**
  	 * Indicates we have waited for everything we can wait for, but the user's finger is still down
  	 */
  	static final int TOUCH_MODE_DONE_WAITING = 2;
  
  	/**
  	 * Indicates the touch gesture is a scroll
  	 */
  	static final int TOUCH_MODE_SCROLL = 3;
  
  	/**
  	 * Indicates the view is in the process of being flung
  	 */
  	static final int TOUCH_MODE_FLING = 4;
  
  	/**
  	 * Regular layout - usually an unsolicited layout from the view system
  	 */
  	static final int LAYOUT_NORMAL = 0;
  
  	/**
  	 * Show the first item
  	 */
  	static final int LAYOUT_FORCE_TOP = 1;
  
  	/**
  	 * Force the selected item to be on somewhere on the screen
  	 */
  	static final int LAYOUT_SET_SELECTION = 2;
  
  	/**
  	 * Show the last item
  	 */
  	static final int LAYOUT_FORCE_BOTTOM = 3;
  
  	/**
  	 * Make a mSelectedItem appear in a specific location and build the rest of
  	 * the views from there. The top is specified by mSpecificTop.
  	 */
  	static final int LAYOUT_SPECIFIC = 4;
  
  	/**
  	 * Layout to sync as a result of a data change. Restore mSyncPosition to have its top
  	 * at mSpecificTop
  	 */
  	static final int LAYOUT_SYNC = 5;
  
  	/**
  	 * Layout as a result of using the navigation keys
  	 */
  	static final int LAYOUT_MOVE_SELECTION = 6;
  
  	/**
  	 * Sets the View to Scroll Vertically.
  	 *
  	 * @see #setScrollDirectionPortrait(int)
  	 * @see #setScrollDirectionLandscape(int)
  	 */
  	static final int SCROLL_VERTICAL = 0;
  
  	/**
  	 * Sets the View to Scroll Horizontally.
  	 *
  	 * @see #setScrollDirectionPortrait(int)
  	 * @see #setScrollDirectionLandscape(int)
  	 */
  	static final int SCROLL_HORIZONTAL = 1;
  	public static final String CONSISTENCY = "Consistency";
  
  
  	/**
  	 * Controls how the next layout will happen
  	 */
  	int mLayoutMode = LAYOUT_NORMAL;
  
  	/**
  	 * Should be used by subclasses to listen to changes in the dataset
  	 */
  	AdapterDataSetObserver mDataSetObserver;
  
  	/**
  	 * The adapter containing the data to be displayed by this view
  	 */
  	ListAdapter mAdapter;
  
  	/**
  	 * Indicates whether the list selector should be drawn on top of the children or behind
  	 */
  	boolean mDrawSelectorOnTop = false;
  
  	/**
  	 * The drawable used to draw the selector
  	 */
  	Drawable mSelector;
  
  	/**
  	 * Defines the selector's location and dimension at drawing time
  	 */
  	Rect mSelectorRect = new Rect();
  
  	/**
  	 * The data set used to store unused views that should be reused during the next layout
  	 * to avoid creating new ones
  	 */
  	final RecycleBin mRecycler = new RecycleBin();
  
  	/**
  	 * The selection's left padding
  	 */
  	int mSelectionLeftPadding = 0;
  
  	/**
  	 * The selection's top padding
  	 */
  	int mSelectionTopPadding = 0;
  
  	/**
  	 * The selection's right padding
  	 */
  	int mSelectionRightPadding = 0;
  
  	/**
  	 * The selection's bottom padding
  	 */
  	int mSelectionBottomPadding = 0;
  
  	/**
  	 * This view's padding
  	 */
  	Rect mListPadding = new Rect();
  
  	/**
  	 * Subclasses must retain their measure spec from onMeasure() into this member
  	 */
  	int mWidthMeasureSpec = 0;
  
  	/**
  	 * The top scroll indicator
  	 */
  	View mScrollUp;
  
  	/**
  	 * The down scroll indicator
  	 */
  	View mScrollDown;
  
  	/**
  	 * The left scroll indicator
  	 */
  	View mScrollLeft;
  
  	/**
  	 * The right scroll indicator
  	 */
  	View mScrollRight;
  
  	/**
  	 * When the view is scrolling, this flag is set to true to indicate subclasses that
  	 * the drawing cache was enabled on the children
  	 */
  	boolean mCachingStarted;
  
  	/**
  	 * The position of the view that received the down motion event
  	 */
  	int mMotionPosition;
  
  
  
  	/**
  	 * The X value associated with the the down motion event
  	 */
  	int mMotionX;
  
  	/**
  	 * The Y value associated with the the down motion event
  	 */
  	int mMotionY;
  
  	/**
  	 * One of TOUCH_MODE_REST, TOUCH_MODE_DOWN, TOUCH_MODE_TAP, TOUCH_MODE_SCROLL, or
  	 * TOUCH_MODE_DONE_WAITING
  	 */
  	int mTouchMode = TOUCH_MODE_REST;
  
  	/**
  	 * Determines speed during touch scrolling
  	 */
  	private VelocityTracker mVelocityTracker;
  
  	/**
  	 * The offset in pixels form the top of the AdapterView to the top
  	 * of the currently selected view. Used to save and restore state.
  	 */
  	int mSelectedTop = 0;
  
  	/**
  	 * Indicates whether the list is stacked from the bottom edge or
  	 * the top edge.
  	 */
  	boolean mStackFromBottom;
  
  	/**
  	 * When set to true, the list automatically discards the children's
  	 * bitmap cache after scrolling.
  	 */
  	boolean mScrollingCacheEnabled;
  
  	/**
  	 * Whether or not to enable the fast scroll feature on this list
  	 */
  	//boolean mFastScrollEnabled;
  
  	/**
  	 * Optional callback to notify client when scroll position has changed
  	 */
  	private OnScrollListener mOnScrollListener;
  
  	/**
  	 * Keeps track of our accessory window
  	 */
  	//PopupWindow mPopup;
  
  	/**
  	 * Used with type filter window
  	 */
  	EditText mTextFilter;
  
  	/**
  	 * Indicates whether to use pixels-based or position-based scrollbar
  	 * properties.
  	 */
  	private boolean mSmoothScrollbarEnabled = true;
  
  	/**
  	 * Indicates that this view supports filtering
  	 */
  	//private boolean mTextFilterEnabled;
  
  	/**
  	 * Indicates that this view is currently displaying a filtered view of the data
  	 */
  	//private boolean mFiltered;
  
  	/**
  	 * Rectangle used for hit testing children
  	 */
  	private Rect mTouchFrame;
  
  	/**
  	 * The position to resurrect the selected position to.
  	 */
  	int mResurrectToPosition = INVALID_POSITION;
  
  	private ContextMenuInfo mContextMenuInfo = null;
  
  	/**
  	 * Used to request a layout when we changed touch mode
  	 */
  	private static final int TOUCH_MODE_UNKNOWN = -1;
  	private static final int TOUCH_MODE_ON = 0;
  	private static final int TOUCH_MODE_OFF = 1;
  
  	private int mLastTouchMode = TOUCH_MODE_UNKNOWN;
  
  	private static final boolean PROFILE_SCROLLING = false;
  	private boolean mScrollProfilingStarted = false;
  
  	private static final boolean PROFILE_FLINGING = false;
  	private boolean mFlingProfilingStarted = false;
  
  	/**
  	 * The last CheckForLongPress runnable we posted, if any
  	 */
  	private CheckForLongPress mPendingCheckForLongPress;
  
  	/**
  	 * The last CheckForTap runnable we posted, if any
  	 */
  	private Runnable mPendingCheckForTap;
  
  	/**
  	 * The last CheckForKeyLongPress runnable we posted, if any
  	 */
  	private CheckForKeyLongPress mPendingCheckForKeyLongPress;
  
  	/**
  	 * Acts upon click
  	 */
  	private TwoWayAbsListView.PerformClick mPerformClick;
  
  	/**
  	 * This view is in transcript mode -- it shows the bottom of the list when the data
  	 * changes
  	 */
  	private int mTranscriptMode;
  
  	/**
  	 * Indicates that this list is always drawn on top of a solid, single-color, opaque
  	 * background
  	 */
  	private int mCacheColorHint;
  
  	/**
  	 * The select child's view (from the adapter's getView) is enabled.
  	 */
  	private boolean mIsChildViewEnabled;
  
  	/**
  	 * The last scroll state reported to clients through {@link OnScrollListener}.
  	 */
  	private int mLastScrollState = OnScrollListener.SCROLL_STATE_IDLE;
  
  	/**
  	 * Helper object that renders and controls the fast scroll thumb.
  	 */
  	//private FastScroller mFastScroller;
  
  	//private boolean mGlobalLayoutListenerAddedFilter;
  
  	private int mTouchSlop;
  	private float mDensityScale;
  
  	//private InputConnection mDefInputConnection;
  	//private InputConnectionWrapper mPublicInputConnection;
  
  	private Runnable mClearScrollingCache;
  	private int mMinimumVelocity;
  	private int mMaximumVelocity;
  	private boolean mScrollVerticallyPortrait;
  	private boolean mScrollVerticallyLandscape;
  
  	protected boolean mScrollVertically;
  
  	protected boolean mPortraitOrientation;
  
  	protected TouchHandler mTouchHandler;
  
  	final boolean[] mIsScrap = new boolean[1];
  
  	// True when the popup should be hidden because of a call to
  	// dispatchDisplayHint()
  	//private boolean mPopupHidden;
  
  	/**
  	 * ID of the active pointer. This is used to retain consistency during
  	 * drags/flings if multiple pointers are used.
  	 */
  	private int mActivePointerId = INVALID_POINTER;
  
  	/**
  	 * Sentinel value for no current active pointer.
  	 * Used by {@link #mActivePointerId}.
  	 */
  	private static final int INVALID_POINTER = -1;
  
  	/**
  	 * Interface definition for a callback to be invoked when the list or grid
  	 * has been scrolled.
  	 */
  	public interface OnScrollListener {
  
  		/**
  		 * The view is not scrolling. Note navigating the list using the trackball counts as
  		 * being in the idle state since these transitions are not animated.
  		 */
  		public static int SCROLL_STATE_IDLE = 0;
  
  		/**
  		 * The user is scrolling using touch, and their finger is still on the screen
  		 */
  		public static int SCROLL_STATE_TOUCH_SCROLL = 1;
  
  		/**
  		 * The user had previously been scrolling using touch and had performed a fling. The
  		 * animation is now coasting to a stop
  		 */
  		public static int SCROLL_STATE_FLING = 2;
  
  		/**
  		 * Callback method to be invoked while the list view or grid view is being scrolled. If the
  		 * view is being scrolled, this method will be called before the next frame of the scroll is
  		 * rendered. In particular, it will be called before any calls to
  		 * {@link Adapter#getView(int, View, ViewGroup)}.
  		 *
  		 * @param view The view whose scroll state is being reported
  		 *
  		 * @param scrollState The current scroll state. One of {@link #SCROLL_STATE_IDLE},
  		 * {@link #SCROLL_STATE_TOUCH_SCROLL} or {@link #SCROLL_STATE_IDLE}.
  		 */
  		public void onScrollStateChanged(TwoWayAbsListView view, int scrollState);
  
  		/**
  		 * Callback method to be invoked when the list or grid has been scrolled. This will be
  		 * called after the scroll has completed
  		 * @param view The view whose scroll state is being reported
  		 * @param firstVisibleItem the index of the first visible cell (ignore if
  		 *        visibleItemCount == 0)
  		 * @param visibleItemCount the number of visible cells
  		 * @param totalItemCount the number of items in the list adaptor
  		 */
  		public void onScroll(TwoWayAbsListView view, int firstVisibleItem, int visibleItemCount,
  				int totalItemCount);
  	}
  
  	public TwoWayAbsListView(Context context) {
  		super(context);
  		initAbsListView();
  		setupScrollInfo();
  		//TypedArray a = context.obtainStyledAttributes(android.R.styleable.View);
  		//initializeScrollbars(a);
  		//a.recycle();
  	}
  
  	public TwoWayAbsListView(Context context, AttributeSet attrs) {
  		this(context, attrs, android.R.attr.absListViewStyle);
  	}
  
  	public TwoWayAbsListView(Context context, AttributeSet attrs, int defStyle) {
  		super(context, attrs, defStyle);
  		initAbsListView();
  
  		TypedArray a = context.obtainStyledAttributes(attrs,
  				R.styleable.TwoWayAbsListView, defStyle, 0);
  
  		Drawable d = a.getDrawable(R.styleable.TwoWayAbsListView_listSelector);
  		if (d != null) {
  			setSelector(d);
  		}
  
  		mDrawSelectorOnTop = a.getBoolean(
  				R.styleable.TwoWayAbsListView_drawSelectorOnTop, false);
  
  		boolean stackFromBottom = a.getBoolean(R.styleable.TwoWayAbsListView_stackFromBottom, false);
  		setStackFromBottom(stackFromBottom);
  
  		boolean scrollingCacheEnabled = a.getBoolean(R.styleable.TwoWayAbsListView_scrollingCache, true);
  		setScrollingCacheEnabled(scrollingCacheEnabled);
  
  		//boolean useTextFilter = a.getBoolean(R.styleable.JessAbsListView_textFilterEnabled, false);
  		//setTextFilterEnabled(useTextFilter);
  
  		int transcriptMode = a.getInt(R.styleable.TwoWayAbsListView_transcriptMode,
  				TRANSCRIPT_MODE_DISABLED);
  		setTranscriptMode(transcriptMode);
  
  		int color = a.getColor(R.styleable.TwoWayAbsListView_cacheColorHint, 0);
  		setCacheColorHint(color);
  
  		//boolean enableFastScroll = a.getBoolean(R.styleable.JessAbsListView_fastScrollEnabled, false);
  		//setFastScrollEnabled(enableFastScroll);
  
  		boolean smoothScrollbar = a.getBoolean(R.styleable.TwoWayAbsListView_smoothScrollbar, true);
  		setSmoothScrollbarEnabled(smoothScrollbar);
  
  		int scrollDirection = a.getInt(R.styleable.TwoWayAbsListView_scrollDirectionPortrait, SCROLL_VERTICAL);
  		mScrollVerticallyPortrait = (scrollDirection == SCROLL_VERTICAL);
  
  		scrollDirection = a.getInt(R.styleable.TwoWayAbsListView_scrollDirectionLandscape, SCROLL_VERTICAL);
  		mScrollVerticallyLandscape = (scrollDirection == SCROLL_VERTICAL);
  
  		a.recycle();
  		setupScrollInfo();
  	}
  
  	private void initAbsListView() {
  		// Setting focusable in touch mode will set the focusable property to true
  		setClickable(true);
  		setFocusableInTouchMode(true);
  		setWillNotDraw(false);
  		setAlwaysDrawnWithCacheEnabled(false);
  		setScrollingCacheEnabled(true);
  
  		final ViewConfiguration configuration = ViewConfiguration.get(mContext);
  		mTouchSlop = configuration.getScaledTouchSlop();
  		mMinimumVelocity = configuration.getScaledMinimumFlingVelocity();
  		mMaximumVelocity = configuration.getScaledMaximumFlingVelocity();
  		mDensityScale = getContext().getResources().getDisplayMetrics().density;
  		mPortraitOrientation = (getResources().getConfiguration().orientation !=
  			Configuration.ORIENTATION_LANDSCAPE);
  		mScrollVertically = true;
  
  
  	}
  
  
  
  	private void setupScrollInfo() {
  		mScrollVertically = mPortraitOrientation ? mScrollVerticallyPortrait: mScrollVerticallyLandscape;
  		if (mScrollVertically) {
  			mTouchHandler = new VerticalTouchHandler();
  			setVerticalScrollBarEnabled(true);
  			setHorizontalScrollBarEnabled(false);
              setIsVertical(true);
  		} else {
  			mTouchHandler = new HorizontalTouchHandler();
  			setVerticalScrollBarEnabled(false);
  			setHorizontalScrollBarEnabled(true);
              setIsVertical(false);
  		}
  
  	}
  
  	private boolean orientationChanged() {
  		boolean temp = mPortraitOrientation;
  		mPortraitOrientation = (getResources().getConfiguration().orientation !=
  			Configuration.ORIENTATION_LANDSCAPE);
  
  		boolean result = (temp != mPortraitOrientation);
  		if (result) {
  			setupScrollInfo();
  			mRecycler.scrapActiveViews();
  		}
  
  		return result;
  	}
  
  	/**
  	 * Enables fast scrolling by letting the user quickly scroll through lists by
  	 * dragging the fast scroll thumb. The adapter attached to the list may want
  	 * to implement {@link SectionIndexer} if it wishes to display alphabet preview and
  	 * jump between sections of the list.
  	 * @see SectionIndexer
  	 * @see #isFastScrollEnabled()
  	 * @param enabled whether or not to enable fast scrolling
  	 */
  	/*
      public void setFastScrollEnabled(boolean enabled) {
          mFastScrollEnabled = enabled;
          if (enabled) {
              if (mFastScroller == null) {
                  mFastScroller = new FastScroller(getContext(), this);
              }
          } else {
              if (mFastScroller != null) {
                  mFastScroller.stop();
                  mFastScroller = null;
              }
          }
      }*/
  
  	/**
  	 * Returns the current state of the fast scroll feature.
  	 * @see #setFastScrollEnabled(boolean)
  	 * @return true if fast scroll is enabled, false otherwise
  	 */
  	/*
      @ViewDebug.ExportedProperty
      public boolean isFastScrollEnabled() {
          return mFastScrollEnabled;
      }
  
      protected boolean isVerticalScrollBarHidden() {
          return mFastScroller != null && mFastScroller.isVisible();
      }*/
  
  	/**
  	 * When smooth scrollbar is enabled, the position and size of the scrollbar thumb
  	 * is computed based on the number of visible pixels in the visible items. This
  	 * however assumes that all list items have the same height. If you use a list in
  	 * which items have different heights, the scrollbar will change appearance as the
  	 * user scrolls through the list. To avoid this issue, you need to disable this
  	 * property.
  	 *
  	 * When smooth scrollbar is disabled, the position and size of the scrollbar thumb
  	 * is based solely on the number of items in the adapter and the position of the
  	 * visible items inside the adapter. This provides a stable scrollbar as the user
  	 * navigates through a list of items with varying heights.
  	 *
  	 * @param enabled Whether or not to enable smooth scrollbar.
  	 *
  	 * @see #setSmoothScrollbarEnabled(boolean)
  	 * @attr ref android.R.styleable#JessAbsListView_smoothScrollbar
  	 */
  	public void setSmoothScrollbarEnabled(boolean enabled) {
  		mSmoothScrollbarEnabled = enabled;
  	}
  
  	/**
  	 * Returns the current state of the fast scroll feature.
  	 *
  	 * @return True if smooth scrollbar is enabled is enabled, false otherwise.
  	 *
  	 * @see #setSmoothScrollbarEnabled(boolean)
  	 */
  	@ViewDebug.ExportedProperty
  	public boolean isSmoothScrollbarEnabled() {
  		return mSmoothScrollbarEnabled;
  	}
  
  	/**
  	 * Set the listener that will receive notifications every time the list scrolls.
  	 *
  	 * @param l the scroll listener
  	 */
  	public void setOnScrollListener(OnScrollListener l) {
  		mOnScrollListener = l;
  		invokeOnItemScrollListener();
  	}
  
  	/**
  	 * Notify our scroll listener (if there is one) of a change in scroll state
  	 */
  	void invokeOnItemScrollListener() {
  		//if (mFastScroller != null) {
  		//    mFastScroller.onScroll(this, mFirstPosition, getChildCount(), mItemCount);
  		//}
  		if (mOnScrollListener != null) {
  			mOnScrollListener.onScroll(this, mFirstPosition, getChildCount(), mItemCount);
  		}
  	}
  
  	/**
  	 * Indicates whether the children's drawing cache is used during a scroll.
  	 * By default, the drawing cache is enabled but this will consume more memory.
  	 *
  	 * @return true if the scrolling cache is enabled, false otherwise
  	 *
  	 * @see #setScrollingCacheEnabled(boolean)
  	 * @see View#setDrawingCacheEnabled(boolean)
  	 */
  	@ViewDebug.ExportedProperty
  	public boolean isScrollingCacheEnabled() {
  		return mScrollingCacheEnabled;
  	}
  
  	/**
  	 * Enables or disables the children's drawing cache during a scroll.
  	 * By default, the drawing cache is enabled but this will use more memory.
  	 *
  	 * When the scrolling cache is enabled, the caches are kept after the
  	 * first scrolling. You can manually clear the cache by calling
  	 * {@link android.view.ViewGroup#setChildrenDrawingCacheEnabled(boolean)}.
  	 *
  	 * @param enabled true to enable the scroll cache, false otherwise
  	 *
  	 * @see #isScrollingCacheEnabled()
  	 * @see View#setDrawingCacheEnabled(boolean)
  	 */
  	public void setScrollingCacheEnabled(boolean enabled) {
  		if (mScrollingCacheEnabled && !enabled) {
  			mTouchHandler.clearScrollingCache();
  		}
  		mScrollingCacheEnabled = enabled;
  	}
  
  //	/**
  //	 * Enables or disables the type filter window. If enabled, typing when
  //	 * this view has focus will filter the children to match the users input.
  //	 * Note that the {@link Adapter} used by this view must implement the
  //	 * {@link Filterable} interface.
  //	 *
  //	 * @param textFilterEnabled true to enable type filtering, false otherwise
  //	 *
  //	 * @see Filterable
  //	 */
  //	//public void setTextFilterEnabled(boolean textFilterEnabled) {
  //	//    mTextFilterEnabled = textFilterEnabled;
  //	//}
  //
  //	/**
  //	 * Indicates whether type filtering is enabled for this view
  //	 *
  //	 * @return true if type filtering is enabled, false otherwise
  //	 *
  //	 * @see #setTextFilterEnabled(boolean)
  //	 * @see Filterable
  //	 */
  //	//@ViewDebug.ExportedProperty
  //	//public boolean isTextFilterEnabled() {
  //	//    return mTextFilterEnabled;
  //	//}
  
  	@Override
  	public void getFocusedRect(Rect r) {
  		View view = getSelectedView();
  		if (view != null && view.getParent() == this) {
  			// the focused rectangle of the selected view offset into the
  			// coordinate space of this view.
  			view.getFocusedRect(r);
  			offsetDescendantRectToMyCoords(view, r);
  		} else {
  			// otherwise, just the norm
  			super.getFocusedRect(r);
  		}
  	}
  
  	private void useDefaultSelector() {
  		setSelector(getResources().getDrawable(
  				android.R.drawable.list_selector_background));
  	}
  
  	/**
  	 * Indicates whether the content of this view is pinned to, or stacked from,
  	 * the bottom edge.
  	 *
  	 * @return true if the content is stacked from the bottom edge, false otherwise
  	 */
  	@ViewDebug.ExportedProperty
  	public boolean isStackFromBottom() {
  		return mStackFromBottom;
  	}
  
  	/**
  	 * When stack from bottom is set to true, the list fills its content starting from
  	 * the bottom of the view.
  	 *
  	 * @param stackFromBottom true to pin the view's content to the bottom edge,
  	 *        false to pin the view's content to the top edge
  	 */
  	public void setStackFromBottom(boolean stackFromBottom) {
  		if (mStackFromBottom != stackFromBottom) {
  			mStackFromBottom = stackFromBottom;
  			requestLayoutIfNecessary();
  		}
  	}
  
  	void requestLayoutIfNecessary() {
  		if (getChildCount() > 0) {
  			resetList();
  			requestLayout();
  			invalidate();
  		}
  	}
  
  	static class SavedState extends BaseSavedState {
  		long selectedId;
  		long firstId;
  		int viewTop;
  		int position;
  		int height;
  		//String filter;
  
  		/**
  		 * Constructor called from {@link TwoWayAbsListView#onSaveInstanceState()}
  		 */
  		SavedState(Parcelable superState) {
  			super(superState);
  		}
  
  		/**
  		 * Constructor called from {@link #CREATOR}
  		 */
  		private SavedState(Parcel in) {
  			super(in);
  			selectedId = in.readLong();
  			firstId = in.readLong();
  			viewTop = in.readInt();
  			position = in.readInt();
  			height = in.readInt();
  			//filter = in.readString();
  		}
  
  		@Override
  		public void writeToParcel(Parcel out, int flags) {
  			super.writeToParcel(out, flags);
  			out.writeLong(selectedId);
  			out.writeLong(firstId);
  			out.writeInt(viewTop);
  			out.writeInt(position);
  			out.writeInt(height);
  			//out.writeString(filter);
  		}
  
  		@Override
  		public String toString() {
  			return "TwoWayAbsListView.SavedState{"
  			+ Integer.toHexString(System.identityHashCode(this))
  			+ " selectedId=" + selectedId
  			+ " firstId=" + firstId
  			+ " viewTop=" + viewTop
  			+ " position=" + position
  			+ " height=" + height + "}";
  			//+ " filter=" + filter + "}";
  		}
  
  		public static final Parcelable.Creator<SavedState> CREATOR
  		= new Parcelable.Creator<SavedState>() {
  			public SavedState createFromParcel(Parcel in) {
  				return new SavedState(in);
  			}
  
  			public SavedState[] newArray(int size) {
  				return new SavedState[size];
  			}
  		};
  	}
  
  	@Override
  	public Parcelable onSaveInstanceState() {
  		/*
  		 * This doesn't really make sense as the place to dismiss the
  		 * popups, but there don't seem to be any other useful hooks
  		 * that happen early enough to keep from getting complaints
  		 * about having leaked the window.
  		 */
  		//dismissPopup();
  
  		Parcelable superState = super.onSaveInstanceState();
  
  		SavedState ss = new SavedState(superState);
  
  		boolean haveChildren = getChildCount() > 0;
  		long selectedId = getSelectedItemId();
  		ss.selectedId = selectedId;
  		ss.height = getHeight();
  
  		if (selectedId >= 0) {
  			// Remember the selection
  			ss.viewTop = mSelectedTop;
  			ss.position = getSelectedItemPosition();
  			ss.firstId = INVALID_POSITION;
  		} else {
  			if (haveChildren) {
  				// Remember the position of the first child
  				View v = getChildAt(0);
  				if(mScrollVertically) {
  					ss.viewTop = v.getTop();
  				} else {
  					ss.viewTop = v.getLeft();
  				}
  				ss.position = mFirstPosition;
  				ss.firstId = mAdapter.getItemId(mFirstPosition);
  			} else {
  				ss.viewTop = 0;
  				ss.firstId = INVALID_POSITION;
  				ss.position = 0;
  			}
  		}
  		/*
          ss.filter = null;
          if (mFiltered) {
              final EditText textFilter = mTextFilter;
              if (textFilter != null) {
                  Editable filterText = textFilter.getText();
                  if (filterText != null) {
                      ss.filter = filterText.toString();
                  }
              }
          }*/
  
  		return ss;
  	}
  
  	@Override
  	public void onRestoreInstanceState(Parcelable state) {
  		SavedState ss = (SavedState) state;
  
  		super.onRestoreInstanceState(ss.getSuperState());
  		mDataChanged = true;
  
  		mSyncSize = ss.height;
  
  		if (ss.selectedId >= 0) {
  			mNeedSync = true;
  			mSyncRowId = ss.selectedId;
  			mSyncPosition = ss.position;
  			mSpecificTop = ss.viewTop;
  			mSyncMode = SYNC_SELECTED_POSITION;
  		} else if (ss.firstId >= 0) {
  			setSelectedPositionInt(INVALID_POSITION);
  			// Do this before setting mNeedSync since setNextSelectedPosition looks at mNeedSync
  			setNextSelectedPositionInt(INVALID_POSITION);
  			mNeedSync = true;
  			mSyncRowId = ss.firstId;
  			mSyncPosition = ss.position;
  			mSpecificTop = ss.viewTop;
  			mSyncMode = SYNC_FIRST_POSITION;
  		}
  
  		//setFilterText(ss.filter);
  
  		requestLayout();
  	}
  
  	//    private boolean acceptFilter() {
  	//        return mTextFilterEnabled && getAdapter() instanceof Filterable &&
  	//                ((Filterable) getAdapter()).getFilter() != null;
  	//    }
  	//
  	//    /**
  	//     * Sets the initial value for the text filter.
  	//     * @param filterText The text to use for the filter.
  	//     *
  	//     * @see #setTextFilterEnabled
  	//     */
  	//    public void setFilterText(String filterText) {
  	//        // TODO: Should we check for acceptFilter()?
  	//        if (mTextFilterEnabled && !TextUtils.isEmpty(filterText)) {
  	//            createTextFilter(false);
  	//            // This is going to call our listener onTextChanged, but we might not
  	//            // be ready to bring up a window yet
  	//            mTextFilter.setText(filterText);
  	//            mTextFilter.setSelection(filterText.length());
  	//            if (mAdapter instanceof Filterable) {
  	//                // if mPopup is non-null, then onTextChanged will do the filtering
  	//                if (mPopup == null) {
  	//                    Filter f = ((Filterable) mAdapter).getFilter();
  	//                    f.filter(filterText);
  	//                }
  	//                // Set filtered to true so we will display the filter window when our main
  	//                // window is ready
  	//                mFiltered = true;
  	//                mDataSetObserver.clearSavedState();
  	//            }
  	//        }
  	//    }
  	//
  	//    /**
  	//     * Returns the list's text filter, if available.
  	//     * @return the list's text filter or null if filtering isn't enabled
  	//     */
  	//    public CharSequence getTextFilter() {
  	//        if (mTextFilterEnabled && mTextFilter != null) {
  	//            return mTextFilter.getText();
  	//        }
  	//        return null;
  	//    }
  
  	@Override
  	protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) {
  		super.onFocusChanged(gainFocus, direction, previouslyFocusedRect);
  		if (gainFocus && mSelectedPosition < 0 && !isInTouchMode()) {
  			resurrectSelection();
  		}
  	}
  
  	@Override
  	public void requestLayout() {
  		if (!mBlockLayoutRequests && !mInLayout) {
  			super.requestLayout();
  		}
  	}
  
  	/**
  	 * The list is empty. Clear everything out.
  	 */
  	void resetList() {
  		removeAllViewsInLayout();
  		mFirstPosition = 0;
  		mDataChanged = false;
  		mNeedSync = false;
  		mOldSelectedPosition = INVALID_POSITION;
  		mOldSelectedRowId = INVALID_ROW_ID;
  		setSelectedPositionInt(INVALID_POSITION);
  		setNextSelectedPositionInt(INVALID_POSITION);
  		mSelectedTop = 0;
  		mSelectorRect.setEmpty();
  		invalidate();
  	}
  
  	@Override
  	protected int computeVerticalScrollExtent() {
  		final int count = getChildCount();
  		if (count > 0 && mScrollVertically) {
  			if (mSmoothScrollbarEnabled) {
  				int extent = count * 100;
  
  				View view = getChildAt(0);
  				final int top = view.getTop();
  				int height = view.getHeight();
  				if (height > 0) {
  					extent += (top * 100) / height;
  				}
  
  				view = getChildAt(count - 1);
  				final int bottom = view.getBottom();
  				height = view.getHeight();
  				if (height > 0) {
  					extent -= ((bottom - getHeight()) * 100) / height;
  				}
  
  				return extent;
  			} else {
  				return 1;
  			}
  		}
  		return 0;
  	}
  
  	@Override
  	protected int computeVerticalScrollOffset() {
  		final int firstPosition = mFirstPosition;
  		final int childCount = getChildCount();
  		if (firstPosition >= 0 && childCount > 0 && mScrollVertically) {
  			if (mSmoothScrollbarEnabled) {
  				final View view = getChildAt(0);
  				final int top = view.getTop();
  				int height = view.getHeight();
  				if (height > 0) {
  					return Math.max(firstPosition * 100 - (top * 100) / height +
  							(int)((float)getScrollY() / getHeight() * mItemCount * 100), 0);
  				}
  			} else {
  				int index;
  				final int count = mItemCount;
  				if (firstPosition == 0) {
  					index = 0;
  				} else if (firstPosition + childCount == count) {
  					index = count;
  				} else {
  					index = firstPosition + childCount / 2;
  				}
  				return (int) (firstPosition + childCount * (index / (float) count));
  			}
  		}
  		return 0;
  	}
  
  	@Override
  	protected int computeVerticalScrollRange() {
  		int result;
  		if (!mScrollVertically) {
  			result = 0;
  		} else if (mSmoothScrollbarEnabled) {
  			result = Math.max(mItemCount * 100, 0);
  		} else {
  			result = mItemCount;
  		}
  		return result;
  	}
  
  	@Override
  	protected int computeHorizontalScrollExtent() {
  		final int count = getChildCount();
  		if (count > 0 && !mScrollVertically) {
  			if (mSmoothScrollbarEnabled) {
  				int extent = count * 100;
  
  				View view = getChildAt(0);
  				final int left = view.getLeft();
  				int width = view.getWidth();
  				if (width > 0) {
  					extent += (left * 100) / width;
  				}
  
  				view = getChildAt(count - 1);
  				final int right = view.getRight();
  				width = view.getWidth();
  				if (width > 0) {
  					extent -= ((right - getWidth()) * 100) / width;
  				}
  
  				return extent;
  			} else {
  				return 1;
  			}
  		}
  		return 0;
  	}
  
  	@Override
  	protected int computeHorizontalScrollOffset() {
  		final int firstPosition = mFirstPosition;
  		final int childCount = getChildCount();
  		if (firstPosition >= 0 && childCount > 0 && !mScrollVertically) {
  			if (mSmoothScrollbarEnabled) {
  				final View view = getChildAt(0);
  				final int left = view.getLeft();
  				int width = view.getWidth();
  				if (width > 0) {
  					return Math.max(firstPosition * 100 - (left * 100) / width +
  							(int)((float)getScrollX() / getWidth() * mItemCount * 100), 0);
  				}
  			} else {
  				int index;
  				final int count = mItemCount;
  				if (firstPosition == 0) {
  					index = 0;
  				} else if (firstPosition + childCount == count) {
  					index = count;
  				} else {
  					index = firstPosition + childCount / 2;
  				}
  				return (int) (firstPosition + childCount * (index / (float) count));
  			}
  		}
  		return 0;
  	}
  
  	@Override
  	protected int computeHorizontalScrollRange() {
  		int result;
  		if (mScrollVertically) {
  			result = 0;
  		} else if (mSmoothScrollbarEnabled) {
  			result = Math.max(mItemCount * 100, 0);
  		} else {
  			result = mItemCount;
  		}
  		return result;
  	}
  
  	@Override
  	protected float getTopFadingEdgeStrength() {
  		final int count = getChildCount();
  		final float fadeEdge = super.getTopFadingEdgeStrength();
  		if (count == 0 || !mScrollVertically) {
  			return fadeEdge;
  		} else {
  			if (mFirstPosition > 0) {
  				return 1.0f;
  			}
  
  			final int top = getChildAt(0).getTop();
  			final float fadeLength = getVerticalFadingEdgeLength();
  			int paddintTop = getPaddingTop();
  			return top < paddintTop ? -(top - paddintTop) / fadeLength : fadeEdge;
  		}
  	}
  
  	@Override
  	protected float getBottomFadingEdgeStrength() {
  		final int count = getChildCount();
  		final float fadeEdge = super.getBottomFadingEdgeStrength();
  		if (count == 0 || !mScrollVertically) {
  			return fadeEdge;
  		} else {
  			if (mFirstPosition + count - 1 < mItemCount - 1) {
  				return 1.0f;
  			}
  
  			final int bottom = getChildAt(count - 1).getBottom();
  			final int height = getHeight();
  			final float fadeLength = getVerticalFadingEdgeLength();
  			int paddingBottom = getPaddingBottom();
  			return bottom > height - paddingBottom ?
  					(bottom - height + paddingBottom) / fadeLength : fadeEdge;
  		}
  	}
  
  	@Override
  	protected float getLeftFadingEdgeStrength() {
  		final int count = getChildCount();
  		final float fadeEdge = super.getLeftFadingEdgeStrength();
  		if (count == 0 || mScrollVertically) {
  			return fadeEdge;
  		} else {
  			if (mFirstPosition > 0) {
  				return 1.0f;
  			}
  
  			final int left = getChildAt(0).getLeft();
  			final float fadeLength = getHorizontalFadingEdgeLength();
  			int paddingLeft = getPaddingLeft();
  			return left < paddingLeft ? -(left - paddingLeft) / fadeLength : fadeEdge;
  		}
  	}
  
  	@Override
  	protected float getRightFadingEdgeStrength() {
  		final int count = getChildCount();
  		final float fadeEdge = super.getRightFadingEdgeStrength();
  		if (count == 0 || mScrollVertically) {
  			return fadeEdge;
  		} else {
  			if (mFirstPosition + count - 1 < mItemCount - 1) {
  				return 1.0f;
  			}
  
  			final int right = getChildAt(count - 1).getRight();
  			final int width = getWidth();
  			final float fadeLength = getHorizontalFadingEdgeLength();
  			int paddingRight = getPaddingRight();
  			return right > width - paddingRight ?
  					(right - width + paddingRight) / fadeLength : fadeEdge;
  		}
  	}
  
  	@Override
  	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
  		orientationChanged();
  
  		if (mSelector == null) {
  			useDefaultSelector();
  		}
  		final Rect listPadding = mListPadding;
  		listPadding.left = mSelectionLeftPadding + getPaddingLeft();
  		listPadding.top = mSelectionTopPadding + getPaddingTop();
  		listPadding.right = mSelectionRightPadding + getPaddingRight();
  		listPadding.bottom = mSelectionBottomPadding + getPaddingBottom();
  	}
  
  	/**
  	 * Subclasses should NOT override this method but
  	 *  {@link #layoutChildren()} instead.
  	 */
  	@Override
  	protected void onLayout(boolean changed, int l, int t, int r, int b) {
  		if (orientationChanged()) {
  			setupScrollInfo();
  		}
  		super.onLayout(changed, l, t, r, b);
  		mInLayout = true;
  		if (changed) {
  			int childCount = getChildCount();
  			for (int i = 0; i < childCount; i++) {
  				getChildAt(i).forceLayout();
  			}
  			mRecycler.markChildrenDirty();
  		}
  
  		layoutChildren();
  		mInLayout = false;
  	}
  
  	/*
      protected boolean setFrame(int left, int top, int right, int bottom) {
          final boolean changed = super.setFrame(left, top, right, bottom);
  
          if (changed) {
              // Reposition the popup when the frame has changed. This includes
              // translating the widget, not just changing its dimension. The
              // filter popup needs to follow the widget.
              final boolean visible = getWindowVisibility() == View.VISIBLE;
              if (mFiltered && visible && mPopup != null && mPopup.isShowing()) {
                  positionPopup();
              }
          }
  
          return changed;
      }*/
  
  	/**
  	 * Subclasses must override this method to layout their children.
  	 */
  	protected void layoutChildren() {
  	}
  
  	void updateScrollIndicators() {
  		if (mScrollUp != null && mScrollVertically) {
  			boolean canScrollUp;
  			// 0th element is not visible
  			canScrollUp = mFirstPosition > 0;
  
  			// ... Or top of 0th element is not visible
  			if (!canScrollUp && getChildCount() > 0) {
  				View child = getChildAt(0);
  				canScrollUp = child.getTop() < mListPadding.top;
  			}
  
  			mScrollUp.setVisibility(canScrollUp ? View.VISIBLE : View.INVISIBLE);
  		}
  
  		if (mScrollDown != null && mScrollVertically) {
  			boolean canScrollDown;
  			int count = getChildCount();
  
  			// Last item is not visible
  			canScrollDown = (mFirstPosition + count) < mItemCount;
  
  			// ... Or bottom of the last element is not visible
  			if (!canScrollDown && count > 0) {
  				View child = getChildAt(count - 1);
  				canScrollDown = child.getBottom() > getBottom() - mListPadding.bottom;
  			}
  
  			mScrollDown.setVisibility(canScrollDown ? View.VISIBLE : View.INVISIBLE);
  		}
  
  		if (mScrollLeft != null && !mScrollVertically) {
  			boolean canScrollLeft;
  			// 0th element is not visible
  			canScrollLeft = mFirstPosition > 0;
  
  			// ... Or top of 0th element is not visible
  			if (!canScrollLeft && getChildCount() > 0) {
  				View child = getChildAt(0);
  				canScrollLeft = child.getLeft() < mListPadding.left;
  			}
  
  			mScrollLeft.setVisibility(canScrollLeft ? View.VISIBLE : View.INVISIBLE);
  		}
  
  		if (mScrollRight != null && !mScrollVertically) {
  			boolean canScrollRight;
  			int count = getChildCount();
  
  			// Last item is not visible
  			canScrollRight = (mFirstPosition + count) < mItemCount;
  
  			// ... Or bottom of the last element is not visible
  			if (!canScrollRight && count > 0) {
  				View child = getChildAt(count - 1);
  				canScrollRight = child.getRight() > getRight() - mListPadding.right;
  			}
  
  			mScrollRight.setVisibility(canScrollRight ? View.VISIBLE : View.INVISIBLE);
  		}
  	}
  
  	@Override
  	@ViewDebug.ExportedProperty
  	public View getSelectedView() {
  		if (mItemCount > 0 && mSelectedPosition >= 0) {
  			return getChildAt(mSelectedPosition - mFirstPosition);
  		} else {
  			return null;
  		}
  	}
  
  	/**
  	 * List padding is the maximum of the normal view's padding and the padding of the selector.
  	 *
  	 * @see android.view.View#getPaddingTop()
  	 * @see #getSelector()
  	 *
  	 * @return The top list padding.
  	 */
  	public int getListPaddingTop() {
  		return mListPadding.top;
  	}
  
  	/**
  	 * List padding is the maximum of the normal view's padding and the padding of the selector.
  	 *
  	 * @see android.view.View#getPaddingBottom()
  	 * @see #getSelector()
  	 *
  	 * @return The bottom list padding.
  	 */
  	public int getListPaddingBottom() {
  		return mListPadding.bottom;
  	}
  
  	/**
  	 * List padding is the maximum of the normal view's padding and the padding of the selector.
  	 *
  	 * @see android.view.View#getPaddingLeft()
  	 * @see #getSelector()
  	 *
  	 * @return The left list padding.
  	 */
  	public int getListPaddingLeft() {
  		return mListPadding.left;
  	}
  
  	/**
  	 * List padding is the maximum of the normal view's padding and the padding of the selector.
  	 *
  	 * @see android.view.View#getPaddingRight()
  	 * @see #getSelector()
  	 *
  	 * @return The right list padding.
  	 */
  	public int getListPaddingRight() {
  		return mListPadding.right;
  	}
  
  	/**
  	 * Get a view and have it show the data associated with the specified
  	 * position. This is called when we have already discovered that the view is
  	 * not available for reuse in the recycle bin. The only choices left are
  	 * converting an old view or making a new one.
  	 *
  	 * @param position The position to display
  	 * @param isScrap Array of at least 1 boolean, the first entry will become true if
  	 *                the returned view was taken from the scrap heap, false if otherwise.
  	 * 
  	 * @return A view displaying the data associated with the specified position
  	 */
  	View obtainView(int position, boolean[] isScrap) {
  		isScrap[0] = false;
  		View scrapView;
  
  		scrapView = mRecycler.getScrapView(position);
  
  		View child;
  		if (scrapView != null) {
  			if (ViewDebug.TRACE_RECYCLER) {
  				ViewDebug.trace(scrapView, ViewDebug.RecyclerTraceType.RECYCLE_FROM_SCRAP_HEAP,
  						position, -1);
  			}
  
  			child = mAdapter.getView(position, scrapView, this);
  
  			if (ViewDebug.TRACE_RECYCLER) {
  				ViewDebug.trace(child, ViewDebug.RecyclerTraceType.BIND_VIEW,
  						position, getChildCount());
  			}
  
  			if (child != scrapView) {
  				mRecycler.addScrapView(scrapView);
  				if (mCacheColorHint != 0) {
  					child.setDrawingCacheBackgroundColor(mCacheColorHint);
  				}
  				if (ViewDebug.TRACE_RECYCLER) {
  					ViewDebug.trace(scrapView, ViewDebug.RecyclerTraceType.MOVE_TO_SCRAP_HEAP,
  							position, -1);
  				}
  			} else {
  				isScrap[0] = true;
  				child.onFinishTemporaryDetach();
  			}
  		} else {
  			child = mAdapter.getView(position, null, this);
  			if (mCacheColorHint != 0) {
  				child.setDrawingCacheBackgroundColor(mCacheColorHint);
  			}
  			if (ViewDebug.TRACE_RECYCLER) {
  				ViewDebug.trace(child, ViewDebug.RecyclerTraceType.NEW_VIEW,
  						position, getChildCount());
  			}
  		}
  
  		return child;
  	}
  
  	void positionSelector(View sel) {
  		final Rect selectorRect = mSelectorRect;
  		selectorRect.set(sel.getLeft(), sel.getTop(), sel.getRight(), sel.getBottom());
  		positionSelector(selectorRect.left, selectorRect.top, selectorRect.right,
  				selectorRect.bottom);
  
  		final boolean isChildViewEnabled = mIsChildViewEnabled;
  		if (sel.isEnabled() != isChildViewEnabled) {
  			mIsChildViewEnabled = !isChildViewEnabled;
  			refreshDrawableState();
  		}
  	}
  
  	private void positionSelector(int l, int t, int r, int b) {
  		mSelectorRect.set(l - mSelectionLeftPadding, t - mSelectionTopPadding, r
  				+ mSelectionRightPadding, b + mSelectionBottomPadding);
  	}
  
  	@Override
  	protected void dispatchDraw(Canvas canvas) {
  		//TODO????
  		/*
          final boolean clipToPadding = (mGroupFlags & CLIP_TO_PADDING_MASK) == CLIP_TO_PADDING_MASK;
          if (clipToPadding) {
              saveCount = canvas.save();
              final int scrollX = getScrollX();
              final int scrollY = getScrollY();
              canvas.clipRect(scrollX + getPaddingLeft(), scrollY + getPaddingTop(),
                      scrollX + getRight() - getLeft() - getPaddingRight(),
                      scrollY + getBottom() - getTop() - getPaddingBottom());
              mGroupFlags &= ~CLIP_TO_PADDING_MASK;
          }*/
  
  		final boolean drawSelectorOnTop = mDrawSelectorOnTop;
  		if (!drawSelectorOnTop) {
  			drawSelector(canvas);
  		}
  
  		super.dispatchDraw(canvas);
  
  		if (drawSelectorOnTop) {
  			drawSelector(canvas);
  		}
  		/*
          if (clipToPadding) {
              canvas.restoreToCount(saveCount);
              mGroupFlags |= CLIP_TO_PADDING_MASK;
          }*/
  	}
  
  	@Override
  	protected void onSizeChanged(int w, int h, int oldw, int oldh) {
  		if (getChildCount() > 0) {
  			mDataChanged = true;
  			rememberSyncState();
  		}
  
  		//if (mFastScroller != null) {
  		//    mFastScroller.onSizeChanged(w, h, oldw, oldh);
  		//}
  	}
  
  	/**
  	 * @return True if the current touch mode requires that we draw the selector in the pressed
  	 *         state.
  	 */
  	boolean touchModeDrawsInPressedState() {
  		// FIXME use isPressed for this
  		switch (mTouchMode) {
  		case TOUCH_MODE_TAP:
  		case TOUCH_MODE_DONE_WAITING:
  			return true;
  		default:
  			return false;
  		}
  	}
  
  	/**
  	 * Indicates whether this view is in a state where the selector should be drawn. This will
  	 * happen if we have focus but are not in touch mode, or we are in the middle of displaying
  	 * the pressed state for an item.
  	 *
  	 * @return True if the selector should be shown
  	 */
  	boolean shouldShowSelector() {
  		return (hasFocus() && !isInTouchMode()) || touchModeDrawsInPressedState();
  	}
  
  	private void drawSelector(Canvas canvas) {
  		if (shouldShowSelector() && mSelectorRect != null && !mSelectorRect.isEmpty()) {
  			final Drawable selector = mSelector;
  			selector.setBounds(mSelectorRect);
  			selector.draw(canvas);
  		}
  	}
  
  	/**
  	 * Controls whether the selection highlight drawable should be drawn on top of the item or
  	 * behind it.
  	 *
  	 * @param onTop If true, the selector will be drawn on the item it is highlighting. The default
  	 *        is false.
  	 *
  	 * @attr ref android.R.styleable#JessAbsListView_drawSelectorOnTop
  	 */
  	public void setDrawSelectorOnTop(boolean onTop) {
  		mDrawSelectorOnTop = onTop;
  	}
  
  	/**
  	 * Set a Drawable that should be used to highlight the currently selected item.
  	 *
  	 * @param resID A Drawable resource to use as the selection highlight.
  	 *
  	 * @attr ref android.R.styleable#JessAbsListView_listSelector
  	 */
  	public void setSelector(int resID) {
  		setSelector(getResources().getDrawable(resID));
  	}
  
  	public void setSelector(Drawable sel) {
  		if (mSelector != null) {
  			mSelector.setCallback(null);
  			unscheduleDrawable(mSelector);
  		}
  		mSelector = sel;
  		Rect padding = new Rect();
  		sel.getPadding(padding);
  		mSelectionLeftPadding = padding.left;
  		mSelectionTopPadding = padding.top;
  		mSelectionRightPadding = padding.right;
  		mSelectionBottomPadding = padding.bottom;
  		sel.setCallback(this);
  		sel.setState(getDrawableState());
  	}
  
  	/**
  	 * Returns the selector {@link android.graphics.drawable.Drawable} that is used to draw the
  	 * selection in the list.
  	 *
  	 * @return the drawable used to display the selector
  	 */
  	public Drawable getSelector() {
  		return mSelector;
  	}
  
  	/**
  	 * Sets the selector state to "pressed" and posts a CheckForKeyLongPress to see if
  	 * this is a long press.
  	 */
  	void keyPressed() {
  		if (!isEnabled() || !isClickable()) {
  			return;
  		}
  
  		Drawable selector = mSelector;
  		Rect selectorRect = mSelectorRect;
  		if (selector != null && (isFocused() || touchModeDrawsInPressedState())
  				&& selectorRect != null && !selectorRect.isEmpty()) {
  
  			final View v = getChildAt(mSelectedPosition - mFirstPosition);
  
  			if (v != null) {
  				if (v.hasFocusable()) return;
  				v.setPressed(true);
  			}
  			setPressed(true);
  
  			final boolean longClickable = isLongClickable();
  			Drawable d = selector.getCurrent();
  			if (d != null && d instanceof TransitionDrawable) {
  				if (longClickable) {
  					((TransitionDrawable) d).startTransition(
  							ViewConfiguration.getLongPressTimeout());
  				} else {
  					((TransitionDrawable) d).resetTransition();
  				}
  			}
  			if (longClickable && !mDataChanged) {
  				if (mPendingCheckForKeyLongPress == null) {
  					mPendingCheckForKeyLongPress = new CheckForKeyLongPress();
  				}
  				mPendingCheckForKeyLongPress.rememberWindowAttachCount();
  				postDelayed(mPendingCheckForKeyLongPress, ViewConfiguration.getLongPressTimeout());
  			}
  		}
  	}
  
  	public void setScrollIndicators(View up, View down, View left, View right) {
  		mScrollUp = up;
  		mScrollDown = down;
  		mScrollLeft = left;
  		mScrollRight = right;
  	}
  
  	@Override
  	protected void drawableStateChanged() {
  		super.drawableStateChanged();
  		if (mSelector != null) {
  			mSelector.setState(getDrawableState());
  		}
  	}
  
  	@Override
  	protected int[] onCreateDrawableState(int extraSpace) {
  		// If the child view is enabled then do the default behavior.
  		if (mIsChildViewEnabled) {
  			// Common case
  			return super.onCreateDrawableState(extraSpace);
  		}
  
  		// The selector uses this View's drawable state. The selected child view
  		// is disabled, so we need to remove the enabled state from the drawable
  		// states.
  		final int enabledState = ENABLED_STATE_SET[0];
  
  		// If we don't have any extra space, it will return one of the static state arrays,
  		// and clearing the enabled state on those arrays is a bad thing!  If we specify
  		// we need extra space, it will create+copy into a new array that safely mutable.
  		int[] state = super.onCreateDrawableState(extraSpace + 1);
  		int enabledPos = -1;
  		for (int i = state.length - 1; i >= 0; i--) {
  			if (state[i] == enabledState) {
  				enabledPos = i;
  				break;
  			}
  		}
  
  		// Remove the enabled state
  		if (enabledPos >= 0) {
  			System.arraycopy(state, enabledPos + 1, state, enabledPos,
  					state.length - enabledPos - 1);
  		}
  
  		return state;
  	}
  
  	@Override
  	public boolean verifyDrawable(Drawable dr) {
  		return mSelector == dr || super.verifyDrawable(dr);
  	}
  
  	@Override
  	protected void onAttachedToWindow() {
  		super.onAttachedToWindow();
  
  		final ViewTreeObserver treeObserver = getViewTreeObserver();
  		if (treeObserver != null) {
  			treeObserver.addOnTouchModeChangeListener(this);
  			/*
              if (mTextFilterEnabled && mPopup != null && !mGlobalLayoutListenerAddedFilter) {
                  treeObserver.addOnGlobalLayoutListener(this);
              }*/
  		}
  	}
  
  	@Override
  	protected void onDetachedFromWindow() {
  		super.onDetachedFromWindow();
  
  		// Dismiss the popup in case onSaveInstanceState() was not invoked
  		//dismissPopup();
  
  		// Detach any view left in the scrap heap
  		mRecycler.clear();
  
  		final ViewTreeObserver treeObserver = getViewTreeObserver();
  		if (treeObserver != null) {
  			treeObserver.removeOnTouchModeChangeListener(this);
  			/*
              if (mTextFilterEnabled && mPopup != null) {
                  treeObserver.removeGlobalOnLayoutListener(this);
                  mGlobalLayoutListenerAddedFilter = false;
              }*/
  		}
  	}
  
  
  
  	/**
  	 * Creates the ContextMenuInfo returned from {@link #getContextMenuInfo()}. This
  	 * methods knows the view, position and ID of the item that received the
  	 * long press.
  	 *
  	 * @param view The view that received the long press.
  	 * @param position The position of the item that received the long press.
  	 * @param id The ID of the item that received the long press.
  	 * @return The extra information that should be returned by
  	 *         {@link #getContextMenuInfo()}.
  	 */
  	ContextMenuInfo createContextMenuInfo(View view, int position, long id) {
  		return new AdapterContextMenuInfo(view, position, id);
  	}
  
  	/**
  	 * A base class for Runnables that will check that their view is still attached to
  	 * the original window as when the Runnable was created.
  	 *
  	 */
  	private class WindowRunnnable {
  		private int mOriginalAttachCount;
  
  		public void rememberWindowAttachCount() {
  			mOriginalAttachCount = getWindowAttachCount();
  		}
  
  		public boolean sameWindow() {
  			return hasWindowFocus() && getWindowAttachCount() == mOriginalAttachCount;
  		}
  	}
  
  	private class PerformClick extends WindowRunnnable implements Runnable {
  		View mChild;
  		int mClickMotionPosition;
  
  		public void run() {
  			// The data has changed since we posted this action in the event queue,
  			// bail out before bad things happen
  			if (mDataChanged) return;
  
  			final ListAdapter adapter = mAdapter;
  			final int motionPosition = mClickMotionPosition;
  			if (adapter != null && mItemCount > 0 &&
  					motionPosition != INVALID_POSITION &&
  					motionPosition < adapter.getCount() && sameWindow()) {
  				performItemClick(mChild, motionPosition, adapter.getItemId(motionPosition));
  			}
  		}
  	}
  
  	private class CheckForLongPress extends WindowRunnnable implements Runnable {
  		public void run() {
  			final int motionPosition = mMotionPosition;
  			final View child = getChildAt(motionPosition - mFirstPosition);
  			if (child != null) {
  				final int longPressPosition = mMotionPosition;
  				final long longPressId = mAdapter.getItemId(mMotionPosition);
  
  				boolean handled = false;
  				if (sameWindow() && !mDataChanged) {
  					handled = performLongPress(child, longPressPosition, longPressId);
  				}
  				if (handled) {
  					mTouchMode = TOUCH_MODE_REST;
  					setPressed(false);
  					child.setPressed(false);
  				} else {
  					mTouchMode = TOUCH_MODE_DONE_WAITING;
  				}
  
  			}
  		}
  	}
  
  	private class CheckForKeyLongPress extends WindowRunnnable implements Runnable {
  		public void run() {
  			if (isPressed() && mSelectedPosition >= 0) {
  				int index = mSelectedPosition - mFirstPosition;
  				View v = getChildAt(index);
  
  				if (!mDataChanged) {
  					boolean handled = false;
  					if (sameWindow()) {
  						handled = performLongPress(v, mSelectedPosition, mSelectedRowId);
  					}
  					if (handled) {
  						setPressed(false);
  						v.setPressed(false);
  					}
  				} else {
  					setPressed(false);
  					if (v != null) v.setPressed(false);
  				}
  			}
  		}
  	}
  
  	private boolean performLongPress(final View child,
  			final int longPressPosition, final long longPressId) {
  		boolean handled = false;
  
  		if (mOnItemLongClickListener != null) {
  			handled = mOnItemLongClickListener.onItemLongClick(TwoWayAbsListView.this, child,
  					longPressPosition, longPressId);
  		}
  		if (!handled) {
  			mContextMenuInfo = createContextMenuInfo(child, longPressPosition, longPressId);
  			handled = super.showContextMenuForChild(TwoWayAbsListView.this);
  		}
  		if (handled) {
  			performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
  		}
  		return handled;
  	}
  
  	@Override
  	protected ContextMenuInfo getContextMenuInfo() {
  		return mContextMenuInfo;
  	}
  
  	@Override
  	public boolean showContextMenuForChild(View originalView) {
  		final int longPressPosition = getPositionForView(originalView);
  		if (longPressPosition >= 0) {
  			final long longPressId = mAdapter.getItemId(longPressPosition);
  			boolean handled = false;
  
  			if (mOnItemLongClickListener != null) {
  				handled = mOnItemLongClickListener.onItemLongClick(TwoWayAbsListView.this, originalView,
  						longPressPosition, longPressId);
  			}
  			if (!handled) {
  				mContextMenuInfo = createContextMenuInfo(
  						getChildAt(longPressPosition - mFirstPosition),
  						longPressPosition, longPressId);
  				handled = super.showContextMenuForChild(originalView);
  			}
  
  			return handled;
  		}
  		return false;
  	}
  
  	@Override
  	public boolean onKeyDown(int keyCode, KeyEvent event) {
  		return false;
  	}
  
  	@Override
  	public boolean onKeyUp(int keyCode, KeyEvent event) {
  		if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER || keyCode == KeyEvent.KEYCODE_ENTER) {
  			if (!isEnabled()) {
  				return true;
  			}
  			if (isClickable() && isPressed() &&
  					mSelectedPosition >= 0 && mAdapter != null &&
  					mSelectedPosition < mAdapter.getCount()) {
  
  				final View view = getChildAt(mSelectedPosition - mFirstPosition);
  				if (view != null) {
  					performItemClick(view, mSelectedPosition, mSelectedRowId);
  					view.setPressed(false);
  				}
  				setPressed(false);
  				return true;
  			}
  		}
  		return super.onKeyUp(keyCode, event);
  	}
  
  	@Override
  	protected void dispatchSetPressed(boolean pressed) {
  		// Don't dispatch setPressed to our children. We call setPressed on ourselves to
  		// get the selector in the right state, but we don't want to press each child.
  	}
  
  	/**
  	 * Maps a point to a position in the list.
  	 *
  	 * @param x X in local coordinate
  	 * @param y Y in local coordinate
  	 * @return The position of the item which contains the specified point, or
  	 *         {@link #INVALID_POSITION} if the point does not intersect an item.
  	 */
  	public int pointToPosition(int x, int y) {
  		Rect frame = mTouchFrame;
  		if (frame == null) {
  			mTouchFrame = new Rect();
  			frame = mTouchFrame;
  		}
  
  		final int count = getChildCount();
  		for (int i = count - 1; i >= 0; i--) {
  			final View child = getChildAt(i);
  			if (child.getVisibility() == View.VISIBLE) {
  				child.getHitRect(frame);
  				if (frame.contains(x, y)) {
  					return mFirstPosition + i;
  				}
  			}
  		}
  		return INVALID_POSITION;
  	}
  
  
  	/**
  	 * Maps a point to a the rowId of the item which intersects that point.
  	 *
  	 * @param x X in local coordinate
  	 * @param y Y in local coordinate
  	 * @return The rowId of the item which contains the specified point, or {@link #INVALID_ROW_ID}
  	 *         if the point does not intersect an item.
  	 */
  	public long pointToRowId(int x, int y) {
  		int position = pointToPosition(x, y);
  		if (position >= 0) {
  			return mAdapter.getItemId(position);
  		}
  		return INVALID_ROW_ID;
  	}
  
  	final class CheckForTap implements Runnable {
  		public void run() {
  			if (mTouchMode == TOUCH_MODE_DOWN) {
  				mTouchMode = TOUCH_MODE_TAP;
  				final View child = getChildAt(mMotionPosition - mFirstPosition);
  				if (child != null && !child.hasFocusable()) {
  					mLayoutMode = LAYOUT_NORMAL;
  
  					if (!mDataChanged) {
  						layoutChildren();
  						child.setPressed(true);
  						positionSelector(child);
  						setPressed(true);
  
  						final int longPressTimeout = ViewConfiguration.getLongPressTimeout();
  						final boolean longClickable = isLongClickable();
  
  						if (mSelector != null) {
  							Drawable d = mSelector.getCurrent();
  							if (d != null && d instanceof TransitionDrawable) {
  								if (longClickable) {
  									((TransitionDrawable) d).startTransition(longPressTimeout);
  								} else {
  									((TransitionDrawable) d).resetTransition();
  								}
  							}
  						}
  
  						if (longClickable) {
  							if (mPendingCheckForLongPress == null) {
  								mPendingCheckForLongPress = new CheckForLongPress();
  							}
  							mPendingCheckForLongPress.rememberWindowAttachCount();
  							postDelayed(mPendingCheckForLongPress, longPressTimeout);
  						} else {
  							mTouchMode = TOUCH_MODE_DONE_WAITING;
  						}
  					} else {
  						mTouchMode = TOUCH_MODE_DONE_WAITING;
  					}
  				}
  			}
  		}
  	}
  
  
  	public boolean startScrollIfNeeded(int delta) {
  		return mTouchHandler.startScrollIfNeeded(delta);
  	}
  
  
  	public void onTouchModeChanged(boolean isInTouchMode) {
  		mTouchHandler.onTouchModeChanged(isInTouchMode);
  	}
  
  	@Override
  	public boolean onTouchEvent(MotionEvent ev) {
  		return mTouchHandler.onTouchEvent(ev);
  	}
  
  	/*
      @Override
      public void draw(Canvas canvas) {
          super.draw(canvas);
          if (mFastScroller != null) {
              mFastScroller.draw(canvas);
          }
      }*/
  
  	@Override
  	public boolean onInterceptTouchEvent(MotionEvent ev) {
  		return mTouchHandler.onInterceptTouchEvent(ev);
  	}
  
  	/**
  	 * {@inheritDoc}
  	 */
  	@Override
  	public void addTouchables(ArrayList<View> views) {
  		final int count = getChildCount();
  		final int firstPosition = mFirstPosition;
  		final ListAdapter adapter = mAdapter;
  
  		if (adapter == null) {
  			return;
  		}
  
  		for (int i = 0; i < count; i++) {
  			final View child = getChildAt(i);
  			if (adapter.isEnabled(firstPosition + i)) {
  				views.add(child);
  			}
  			child.addTouchables(views);
  		}
  	}
  
  
  	/**
  	 * Fires an "on scroll state changed" event to the registered
  	 * {@link android.widget.AbsListView.OnScrollListener}, if any. The state change
  	 * is fired only if the specified state is different from the previously known state.
  	 *
  	 * @param newState The new scroll state.
  	 */
  	void reportScrollStateChange(int newState) {
  		if (newState != mLastScrollState && mOnScrollListener != null) {
  			mOnScrollListener.onScrollStateChanged(this, newState);
  			mLastScrollState = newState;
  		}
  	}
  
  	@Override
  	public void onWindowFocusChanged(boolean hasWindowFocus) {
  		super.onWindowFocusChanged(hasWindowFocus);
  		mTouchHandler.onWindowFocusChanged(hasWindowFocus);
  	}
  
  
  	/**
  	 * Smoothly scroll to the specified adapter position. The view will
  	 * scroll such that the indicated position is displayed.
  	 * @param position Scroll to this adapter position.
  	 */
  	public void smoothScrollToPosition(int position) {
  		mTouchHandler.smoothScrollToPosition(position);
  	}
  
  	/**
  	 * Smoothly scroll to the specified adapter position. The view will
  	 * scroll such that the indicated position is displayed, but it will
  	 * stop early if scrolling further would scroll boundPosition out of
  	 * view.
  	 * @param position Scroll to this adapter position.
  	 * @param boundPosition Do not scroll if it would move this adapter
  	 *          position out of view.
  	 */
  	public void smoothScrollToPosition(int position, int boundPosition) {
  		mTouchHandler.smoothScrollToPosition(position, boundPosition);
  	}
  
  	/**
  	 * Smoothly scroll by distance pixels over duration milliseconds.
  	 * @param distance Distance to scroll in pixels.
  	 * @param duration Duration of the scroll animation in milliseconds.
  	 */
  	public void smoothScrollBy(int distance, int duration) {
  		mTouchHandler.smoothScrollBy(distance, duration);
  	}
  
  
  	/**
  	 * Returns the number of header views in the list. Header views are special views
  	 * at the top of the list that should not be recycled during a layout.
  	 *
  	 * @return The number of header views, 0 in the default implementation.
  	 */
  	int getHeaderViewsCount() {
  		return 0;
  	}
  
  	/**
  	 * Returns the number of footer views in the list. Footer views are special views
  	 * at the bottom of the list that should not be recycled during a layout.
  	 *
  	 * @return The number of footer views, 0 in the default implementation.
  	 */
  	int getFooterViewsCount() {
  		return 0;
  	}
  
  	/**
  	 * Fills the gap left open by a touch-scroll. During a touch scroll, children that
  	 * remain on screen are shifted and the other ones are discarded. The role of this
  	 * method is to fill the gap thus created by performing a partial layout in the
  	 * empty space.
  	 *
  	 * @param down true if the scroll is going down, false if it is going up
  	 */
  	abstract void fillGap(boolean down);
  
  	void hideSelector() {
  		if (mSelectedPosition != INVALID_POSITION) {
  			if (mLayoutMode != LAYOUT_SPECIFIC) {
  				mResurrectToPosition = mSelectedPosition;
  			}
  			if (mNextSelectedPosition >= 0 && mNextSelectedPosition != mSelectedPosition) {
  				mResurrectToPosition = mNextSelectedPosition;
  			}
  			setSelectedPositionInt(INVALID_POSITION);
  			setNextSelectedPositionInt(INVALID_POSITION);
  			mSelectedTop = 0;
  			mSelectorRect.setEmpty();
  		}
  	}
  
  	/**
  	 * @return A position to select. First we try mSelectedPosition. If that has been clobbered by
  	 * entering touch mode, we then try mResurrectToPosition. Values are pinned to the range
  	 * of items available in the adapter
  	 */
  	int reconcileSelectedPosition() {
  		int position = mSelectedPosition;
  		if (position < 0) {
  			position = mResurrectToPosition;
  		}
  		position = Math.max(0, position);
  		position = Math.min(position, mItemCount - 1);
  		return position;
  	}
  
  	/**
  	 * Find the row closest to y. This row will be used as the motion row when scrolling
  	 *
  	 * @param y Where the user touched
  	 * @return The position of the first (or only) item in the row containing y
  	 */
  	abstract int findMotionRowY(int y);
  
  	/**
  	 * Find the row closest to y. This row will be used as the motion row when scrolling.
  	 * 
  	 * @param y Where the user touched
  	 * @return The position of the first (or only) item in the row closest to y
  	 */
  	int findClosestMotionRowY(int y) {
  		final int childCount = getChildCount();
  		if (childCount == 0) {
  			return INVALID_POSITION;
  		}
  
  		final int motionRow = findMotionRowY(y);
  		return motionRow != INVALID_POSITION ? motionRow : mFirstPosition + childCount - 1;
  	}
  
  	/**
  	 * Find the row closest to x. This row will be used as the motion row when scrolling
  	 *
  	 * @param x Where the user touched
  	 * @return The position of the first (or only) item in the row containing y
  	 */
  	abstract int findMotionRowX(int x);
  
  	/**
  	 * Find the row closest to y. This row will be used as the motion row when scrolling.
  	 * 
  	 * @param x Where the user touched
  	 * @return The position of the first (or only) item in the row closest to y
  	 */
  	int findClosestMotionRow(int x) {
  		final int childCount = getChildCount();
  		if (childCount == 0) {
  			return INVALID_POSITION;
  		}
  
  		final int motionRow = findMotionRowX(x);
  		return motionRow != INVALID_POSITION ? motionRow : mFirstPosition + childCount - 1;
  	}
  
  	/**
  	 * Causes all the views to be rebuilt and redrawn.
  	 */
  	public void invalidateViews() {
  		mDataChanged = true;
  		rememberSyncState();
  		requestLayout();
  		invalidate();
  	}
  
  	/**
  	 * Makes the item at the supplied position selected.
  	 *
  	 * @param position the position of the new selection
  	 */
  	abstract void setSelectionInt(int position);
  
  	/**
  	 * Attempt to bring the selection back if the user is switching from touch
  	 * to trackball mode
  	 * @return Whether selection was set to something.
  	 */
  	boolean resurrectSelection() {
  		return mTouchHandler.resurrectSelection();
  	}
  
  	@Override
  	protected void handleDataChanged() {
  		int count = mItemCount;
  		if (count > 0) {
  
  			int newPos;
  
  			int selectablePos;
  
  			// Find the row we are supposed to sync to
  			if (mNeedSync) {
  				// Update this first, since setNextSelectedPositionInt inspects it
  				mNeedSync = false;
  
  				if (mTranscriptMode == TRANSCRIPT_MODE_ALWAYS_SCROLL ||
  						(mTranscriptMode == TRANSCRIPT_MODE_NORMAL &&
  								mFirstPosition + getChildCount() >= mOldItemCount)) {
  					mLayoutMode = LAYOUT_FORCE_BOTTOM;
  					return;
  				}
  
  				if (mSyncMode == SYNC_SELECTED_POSITION ) {
  					if (isInTouchMode()) {
  						// We saved our state when not in touch mode. (We know this because
  						// mSyncMode is SYNC_SELECTED_POSITION.) Now we are trying to
  						// restore in touch mode. Just leave mSyncPosition as it is (possibly
  						// adjusting if the available range changed) and return.
  						mLayoutMode = LAYOUT_SYNC;
  						mSyncPosition = Math.min(Math.max(0, mSyncPosition), count - 1);
  
  						return;
  					} else {
  						// See if we can find a position in the new data with the same
  						// id as the old selection. This will change mSyncPosition.
  						newPos = findSyncPosition();
  						if (newPos >= 0) {
  							// Found it. Now verify that new selection is still selectable
  							selectablePos = lookForSelectablePosition(newPos, true);
  							if (selectablePos == newPos) {
  								// Same row id is selected
  								mSyncPosition = newPos;
  								int size = mIsVertical ? getHeight() : getWidth();
  								if (mSyncSize == size) {
  									// If we are at the same height as when we saved state, try
  									// to restore the scroll position too.
  									mLayoutMode = LAYOUT_SYNC;
  								} else {
  									// We are not the same height as when the selection was saved, so
  									// don't try to restore the exact position
  									mLayoutMode = LAYOUT_SET_SELECTION;
  								}
  
  								// Restore selection
  								setNextSelectedPositionInt(newPos);
  								return;
  							}
  						}
  					}
  				} else if(mSyncMode == SYNC_FIRST_POSITION)  {
  					// Leave mSyncPosition as it is -- just pin to available range
  					mLayoutMode = LAYOUT_SYNC;
  					mSyncPosition = Math.min(Math.max(0, mSyncPosition), count - 1);
  
  					return;
  				}
  			}
  
  			if (!isInTouchMode()) {
  				// We couldn't find matching data -- try to use the same position
  				newPos = getSelectedItemPosition();
  
  				// Pin position to the available range
  				if (newPos >= count) {
  					newPos = count - 1;
  				}
  				if (newPos < 0) {
  					newPos = 0;
  				}
  
  				// Make sure we select something selectable -- first look down
  				selectablePos = lookForSelectablePosition(newPos, true);
  
  				if (selectablePos >= 0) {
  					setNextSelectedPositionInt(selectablePos);
  					return;
  				} else {
  					// Looking down didn't work -- try looking up
  					selectablePos = lookForSelectablePosition(newPos, false);
  					if (selectablePos >= 0) {
  						setNextSelectedPositionInt(selectablePos);
  						return;
  					}
  				}
  			} else {
  
  				// We already know where we want to resurrect the selection
  				if (mResurrectToPosition >= 0) {
  					return;
  				}
  			}
  
  		}
  
  		// Nothing is selected. Give up and reset everything.
  		mLayoutMode = mStackFromBottom ? LAYOUT_FORCE_BOTTOM : LAYOUT_FORCE_TOP;
  		mSelectedPosition = INVALID_POSITION;
  		mSelectedRowId = INVALID_ROW_ID;
  		mNextSelectedPosition = INVALID_POSITION;
  		mNextSelectedRowId = INVALID_ROW_ID;
  		mNeedSync = false;
  		checkSelectionChanged();
  	}
  
  
  	//    @Override
  	//    protected void onDisplayHint(int hint) {
  	//        super.onDisplayHint(hint);
  	//        switch (hint) {
  	//            case INVISIBLE:
  	//                if (mPopup != null && mPopup.isShowing()) {
  	//                    dismissPopup();
  	//                }
  	//                break;
  	//            case VISIBLE:
  	//                if (mFiltered && mPopup != null && !mPopup.isShowing()) {
  	//                    showPopup();
  	//                }
  	//                break;
  	//        }
  	//        mPopupHidden = hint == INVISIBLE;
  	//    }
  	//
  	//    /**
  	//     * Removes the filter window
  	//     */
  	//    private void dismissPopup() {
  	//        if (mPopup != null) {
  	//            mPopup.dismiss();
  	//        }
  	//    }
  	//
  	//    /**
  	//     * Shows the filter window
  	//     */
  	//    private void showPopup() {
  	//        // Make sure we have a window before showing the popup
  	//        if (getWindowVisibility() == View.VISIBLE) {
  	//            createTextFilter(true);
  	//            positionPopup();
  	//            // Make sure we get focus if we are showing the popup
  	//            checkFocus();
  	//        }
  	//    }
  	//
  	//    private void positionPopup() {
  	//        int screenHeight = getResources().getDisplayMetrics().heightPixels;
  	//        final int[] xy = new int[2];
  	//        getLocationOnScreen(xy);
  	//        // TODO: The 20 below should come from the theme
  	//        // TODO: And the gravity should be defined in the theme as well
  	//        final int bottomGap = screenHeight - xy[1] - getHeight() + (int) (mDensityScale * 20);
  	//        if (!mPopup.isShowing()) {
  	//            mPopup.showAtLocation(this, Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL,
  	//                    xy[0], bottomGap);
  	//        } else {
  	//            mPopup.update(xy[0], bottomGap, -1, -1);
  	//        }
  	//    }
  
  	/**
  	 * What is the distance between the source and destination rectangles given the direction of
  	 * focus navigation between them? The direction basically helps figure out more quickly what is
  	 * self evident by the relationship between the rects...
  	 *
  	 * @param source the source rectangle
  	 * @param dest the destination rectangle
  	 * @param direction the direction
  	 * @return the distance between the rectangles
  	 */
  	static int getDistance(Rect source, Rect dest, int direction) {
  		int sX, sY; // source x, y
  		int dX, dY; // dest x, y
  		switch (direction) {
  		case View.FOCUS_RIGHT:
  			sX = source.right;
  			sY = source.top + source.height() / 2;
  			dX = dest.left;
  			dY = dest.top + dest.height() / 2;
  			break;
  		case View.FOCUS_DOWN:
  			sX = source.left + source.width() / 2;
  			sY = source.bottom;
  			dX = dest.left + dest.width() / 2;
  			dY = dest.top;
  			break;
  		case View.FOCUS_LEFT:
  			sX = source.left;
  			sY = source.top + source.height() / 2;
  			dX = dest.right;
  			dY = dest.top + dest.height() / 2;
  			break;
  		case View.FOCUS_UP:
  			sX = source.left + source.width() / 2;
  			sY = source.top;
  			dX = dest.left + dest.width() / 2;
  			dY = dest.bottom;
  			break;
  		case View.FOCUS_FORWARD:
  		case View.FOCUS_BACKWARD:
  			sX = source.right + source.width() / 2;
  			sY = source.top + source.height() / 2;
  			dX = dest.left + dest.width() / 2;
  			dY = dest.top + dest.height() / 2;
  			break;
  		default:
  			throw new IllegalArgumentException("direction must be one of "
  				+ "{FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, FOCUS_RIGHT, "
  				+ "FOCUS_FORWARD, FOCUS_BACKWARD}.");
  		}
  		int deltaX = dX - sX;
  		int deltaY = dY - sY;
  		return deltaY * deltaY + deltaX * deltaX;
  	}
  
  	//    @Override
  	//    protected boolean isInFilterMode() {
  	//        return mFiltered;
  	//    }
  	//
  	//    /**
  	//     * Sends a key to the text filter window
  	//     *
  	//     * @param keyCode The keycode for the event
  	//     * @param event The actual key event
  	//     *
  	//     * @return True if the text filter handled the event, false otherwise.
  	//     */
  	//    boolean sendToTextFilter(int keyCode, int count, KeyEvent event) {
  	//        if (!acceptFilter()) {
  	//            return false;
  	//        }
  	//
  	//        boolean handled = false;
  	//        boolean okToSend = true;
  	//        switch (keyCode) {
  	//        case KeyEvent.KEYCODE_DPAD_UP:
  	//        case KeyEvent.KEYCODE_DPAD_DOWN:
  	//        case KeyEvent.KEYCODE_DPAD_LEFT:
  	//        case KeyEvent.KEYCODE_DPAD_RIGHT:
  	//        case KeyEvent.KEYCODE_DPAD_CENTER:
  	//        case KeyEvent.KEYCODE_ENTER:
  	//            okToSend = false;
  	//            break;
  	//        case KeyEvent.KEYCODE_BACK:
  	//            if (mFiltered && mPopup != null && mPopup.isShowing()) {
  	//                if (event.getAction() == KeyEvent.ACTION_DOWN
  	//                        && event.getRepeatCount() == 0) {
  	//                    getKeyDispatcherState().startTracking(event, this);
  	//                    handled = true;
  	//                } else if (event.getAction() == KeyEvent.ACTION_UP
  	//                        && event.isTracking() && !event.isCanceled()) {
  	//                    handled = true;
  	//                    mTextFilter.setText("");
  	//                }
  	//            }
  	//            okToSend = false;
  	//            break;
  	//        case KeyEvent.KEYCODE_SPACE:
  	//            // Only send spaces once we are filtered
  	//            okToSend = mFiltered;
  	//            break;
  	//        }
  	//
  	//        if (okToSend) {
  	//            createTextFilter(true);
  	//
  	//            KeyEvent forwardEvent = event;
  	//            if (forwardEvent.getRepeatCount() > 0) {
  	//                forwardEvent = KeyEvent.changeTimeRepeat(event, event.getEventTime(), 0);
  	//            }
  	//
  	//            int action = event.getAction();
  	//            switch (action) {
  	//                case KeyEvent.ACTION_DOWN:
  	//                    handled = mTextFilter.onKeyDown(keyCode, forwardEvent);
  	//                    break;
  	//
  	//                case KeyEvent.ACTION_UP:
  	//                    handled = mTextFilter.onKeyUp(keyCode, forwardEvent);
  	//                    break;
  	//
  	//                case KeyEvent.ACTION_MULTIPLE:
  	//                    handled = mTextFilter.onKeyMultiple(keyCode, count, event);
  	//                    break;
  	//            }
  	//        }
  	//        return handled;
  	//    }
  	//
  	//    /**
  	//     * Return an InputConnection for editing of the filter text.
  	//     */
  	//    @Override
  	//    public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
  	//        if (isTextFilterEnabled()) {
  	//            // XXX we need to have the text filter created, so we can get an
  	//            // InputConnection to proxy to.  Unfortunately this means we pretty
  	//            // much need to make it as soon as a list view gets focus.
  	//            createTextFilter(false);
  	//            if (mPublicInputConnection == null) {
  	//                mDefInputConnection = new BaseInputConnection(this, false);
  	//                mPublicInputConnection = new InputConnectionWrapper(
  	//                        mTextFilter.onCreateInputConnection(outAttrs), true) {
  	//                    @Override
  	//                    public boolean reportFullscreenMode(boolean enabled) {
  	//                        // Use our own input connection, since it is
  	//                        // the "real" one the IME is talking with.
  	//                        return mDefInputConnection.reportFullscreenMode(enabled);
  	//                    }
  	//
  	//                    @Override
  	//                    public boolean performEditorAction(int editorAction) {
  	//                        // The editor is off in its own window; we need to be
  	//                        // the one that does this.
  	//                        if (editorAction == EditorInfo.IME_ACTION_DONE) {
  	//                            InputMethodManager imm = (InputMethodManager)
  	//                                    getContext().getSystemService(
  	//                                            Context.INPUT_METHOD_SERVICE);
  	//                            if (imm != null) {
  	//                                imm.hideSoftInputFromWindow(getWindowToken(), 0);
  	//                            }
  	//                            return true;
  	//                        }
  	//                        return false;
  	//                    }
  	//
  	//                    @Override
  	//                    public boolean sendKeyEvent(KeyEvent event) {
  	//                        // Use our own input connection, since the filter
  	//                        // text view may not be shown in a window so has
  	//                        // no ViewRoot to dispatch events with.
  	//                        return mDefInputConnection.sendKeyEvent(event);
  	//                    }
  	//                };
  	//            }
  	//            outAttrs.inputType = EditorInfo.TYPE_CLASS_TEXT
  	//                    | EditorInfo.TYPE_TEXT_VARIATION_FILTER;
  	//            outAttrs.imeOptions = EditorInfo.IME_ACTION_DONE;
  	//            return mPublicInputConnection;
  	//        }
  	//        return null;
  	//    }
  	//
  	//    /**
  	//     * For filtering we proxy an input connection to an internal text editor,
  	//     * and this allows the proxying to happen.
  	//     */
  	//
  	//    @Override
  	//    public boolean checkInputConnectionProxy(View view) {
  	//        return view == mTextFilter;
  	//    }
  	//
  	//    /**
  	//     * Creates the window for the text filter and populates it with an EditText field;
  	//     *
  	//     * @param animateEntrance true if the window should appear with an animation
  	//     */
  	//    /*
  	//    private void createTextFilter(boolean animateEntrance) {
  	//        if (mPopup == null) {
  	//            Context c = getContext();
  	//            PopupWindow p = new PopupWindow(c);
  	//            LayoutInflater layoutInflater = (LayoutInflater)
  	//                    c.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
  	//            mTextFilter = (EditText) layoutInflater.inflate(
  	//                    android.R.layout.typing_filter, null);
  	//            // For some reason setting this as the "real" input type changes
  	//            // the text view in some way that it doesn't work, and I don't
  	//            // want to figure out why this is.
  	//            mTextFilter.setRawInputType(EditorInfo.TYPE_CLASS_TEXT
  	//                    | EditorInfo.TYPE_TEXT_VARIATION_FILTER);
  	//            mTextFilter.setImeOptions(EditorInfo.IME_FLAG_NO_EXTRACT_UI);
  	//            mTextFilter.addTextChangedListener(this);
  	//            p.setFocusable(false);
  	//            p.setTouchable(false);
  	//            p.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
  	//            p.setContentView(mTextFilter);
  	//            p.setWidth(LayoutParams.WRAP_CONTENT);
  	//            p.setHeight(LayoutParams.WRAP_CONTENT);
  	//            p.setBackgroundDrawable(null);
  	//            mPopup = p;
  	//            getViewTreeObserver().addOnGlobalLayoutListener(this);
  	//            mGlobalLayoutListenerAddedFilter = true;
  	//        }
  	//        if (animateEntrance) {
  	//            mPopup.setAnimationStyle(R.style.Animation_TypingFilter);
  	//        } else {
  	//            mPopup.setAnimationStyle(R.style.Animation_TypingFilterRestore);
  	//        }
  	//    }*/
  	//
  	//    /**
  	//     * Clear the text filter.
  	//     */
  	//    /*
  	//    public void clearTextFilter() {
  	//        if (mFiltered) {
  	//            mTextFilter.setText("");
  	//            mFiltered = false;
  	//            if (mPopup != null && mPopup.isShowing()) {
  	//                dismissPopup();
  	//            }
  	//        }
  	//    }*/
  	//
  	//    /**
  	//     * Returns if the ListView currently has a text filter.
  	//     */
  	//    public boolean hasTextFilter() {
  	//        return mFiltered;
  	//    }
  	//
  	//    public void onGlobalLayout() {
  	//        if (isShown()) {
  	//            // Show the popup if we are filtered
  	//            if (mFiltered && mPopup != null && !mPopup.isShowing() && !mPopupHidden) {
  	//                showPopup();
  	//            }
  	//        } else {
  	//            // Hide the popup when we are no longer visible
  	//            if (mPopup != null && mPopup.isShowing()) {
  	//                dismissPopup();
  	//            }
  	//        }
  	//
  	//    }
  	//
  	//    /**
  	//     * For our text watcher that is associated with the text filter.  Does
  	//     * nothing.
  	//     */
  	//    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
  	//    }
  	//
  	//    /**
  	//     * For our text watcher that is associated with the text filter. Performs
  	//     * the actual filtering as the text changes, and takes care of hiding and
  	//     * showing the popup displaying the currently entered filter text.
  	//     */
  	//    public void onTextChanged(CharSequence s, int start, int before, int count) {
  	//        if (mPopup != null && isTextFilterEnabled()) {
  	//            int length = s.length();
  	//            boolean showing = mPopup.isShowing();
  	//            if (!showing && length > 0) {
  	//                // Show the filter popup if necessary
  	//                showPopup();
  	//                mFiltered = true;
  	//            } else if (showing && length == 0) {
  	//                // Remove the filter popup if the user has cleared all text
  	//                dismissPopup();
  	//                mFiltered = false;
  	//            }
  	//            if (mAdapter instanceof Filterable) {
  	//                Filter f = ((Filterable) mAdapter).getFilter();
  	//                // Filter should not be null when we reach this part
  	//                if (f != null) {
  	//                    f.filter(s, this);
  	//                } else {
  	//                    throw new IllegalStateException("You cannot call onTextChanged with a non "
  	//                            + "filterable adapter");
  	//                }
  	//            }
  	//        }
  	//    }
  	//
  	//    /**
  	//     * For our text watcher that is associated with the text filter.  Does
  	//     * nothing.
  	//     */
  	//    public void afterTextChanged(Editable s) {
  	//    }
  	//
  	//    public void onFilterComplete(int count) {
  	//        if (mSelectedPosition < 0 && count > 0) {
  	//            mResurrectToPosition = INVALID_POSITION;
  	//            resurrectSelection();
  	//        }
  	//    }
  
  	@Override
  	protected ViewGroup.LayoutParams generateLayoutParams(ViewGroup.LayoutParams p) {
  		return new LayoutParams(p);
  	}
  
  	@Override
  	public LayoutParams generateLayoutParams(AttributeSet attrs) {
  		return new TwoWayAbsListView.LayoutParams(getContext(), attrs);
  	}
  
  	@Override
  	protected boolean checkLayoutParams(ViewGroup.LayoutParams p) {
  		return p instanceof TwoWayAbsListView.LayoutParams;
  	}
  
  	/**
  	 * Puts the list or grid into transcript mode. In this mode the list or grid will always scroll
  	 * to the bottom to show new items.
  	 *
  	 * @param mode the transcript mode to set
  	 *
  	 * @see #TRANSCRIPT_MODE_DISABLED
  	 * @see #TRANSCRIPT_MODE_NORMAL
  	 * @see #TRANSCRIPT_MODE_ALWAYS_SCROLL
  	 */
  	public void setTranscriptMode(int mode) {
  		mTranscriptMode = mode;
  	}
  
  	/**
  	 * Returns the current transcript mode.
  	 *
  	 * @return {@link #TRANSCRIPT_MODE_DISABLED}, {@link #TRANSCRIPT_MODE_NORMAL} or
  	 *         {@link #TRANSCRIPT_MODE_ALWAYS_SCROLL}
  	 */
  	public int getTranscriptMode() {
  		return mTranscriptMode;
  	}
  
  	/**
  	 * Sets the direction that the view schould scroll when in portrait orientation
  	 *
  	 * @param direction the view should scroll
  	 *
  	 * @see #SCROLL_VERTICAL
  	 * @see #SCROLL_HORIZONTAL
  	 */
  	public void setScrollDirectionPortrait(int direction) {
  		boolean tempDirection = mScrollVerticallyPortrait;
  		mScrollVerticallyPortrait = (direction == SCROLL_VERTICAL);
  		if (tempDirection != mScrollVerticallyPortrait) {
  			setupScrollInfo();
  			//TODO or requestLayoutIfNecessary()?
  			resetList();
  			mRecycler.clear();
  		}
  	}
  
  	/**
  	 * Returns the current portrait scroll direction.
  	 *
  	 * @return {@link #SCROLL_VERTICAL} or {@link #SCROLL_HORIZONTAL}
  	 */
  	public int getScrollDirectionPortrait() {
  		return mScrollVerticallyPortrait ? SCROLL_VERTICAL : SCROLL_HORIZONTAL;
  	}
  
  	/**
  	 * Sets the direction that the view schould scroll when in landscape orientation
  	 *
  	 * @param direction the view should scroll
  	 *
  	 * @see #SCROLL_VERTICAL
  	 * @see #SCROLL_HORIZONTAL
  	 */
  	public void setScrollDirectionLandscape(int direction) {
  		boolean tempDirection = mScrollVerticallyLandscape;
  		mScrollVerticallyLandscape = (direction == SCROLL_VERTICAL);
  		if (tempDirection != mScrollVerticallyLandscape) {
  			setupScrollInfo();
  			//TODO or requestLayoutIfNecessary()?
  			resetList();
  			mRecycler.clear();
  		}
  	}
  
  	/**
  	 * Returns the current landscape scroll direction.
  	 *
  	 * @return {@link #SCROLL_VERTICAL} or {@link #SCROLL_HORIZONTAL}
  	 */
  	public int getScrollDirectionLandscape() {
  		return mScrollVerticallyLandscape ? SCROLL_VERTICAL : SCROLL_HORIZONTAL;
  	}
  
  	@Override
  	public int getSolidColor() {
  		return mCacheColorHint;
  	}
  
  	/**
  	 * When set to a non-zero value, the cache color hint indicates that this list is always drawn
  	 * on top of a solid, single-color, opaque background
  	 *
  	 * @param color The background color
  	 */
  	public void setCacheColorHint(int color) {
  		if (color != mCacheColorHint) {
  			mCacheColorHint = color;
  			int count = getChildCount();
  			for (int i = 0; i < count; i++) {
  				getChildAt(i).setDrawingCacheBackgroundColor(color);
  			}
  			mRecycler.setCacheColorHint(color);
  		}
  	}
  
  	/**
  	 * When set to a non-zero value, the cache color hint indicates that this list is always drawn
  	 * on top of a solid, single-color, opaque background
  	 *
  	 * @return The cache color hint
  	 */
  	public int getCacheColorHint() {
  		return mCacheColorHint;
  	}
  
  	/**
  	 * Move all views (excluding headers and footers) held by this TwoWayAbsListView into the supplied
  	 * List. This includes views displayed on the screen as well as views stored in TwoWayAbsListView's
  	 * internal view recycler.
  	 *
  	 * @param views A list into which to put the reclaimed views
  	 */
  	public void reclaimViews(List<View> views) {
  		int childCount = getChildCount();
  		RecyclerListener listener = mRecycler.mRecyclerListener;
  
  		// Reclaim views on screen
  		for (int i = 0; i < childCount; i++) {
  			View child = getChildAt(i);
  			TwoWayAbsListView.LayoutParams lp = (TwoWayAbsListView.LayoutParams) child.getLayoutParams();
  			// Don't reclaim header or footer views, or views that should be ignored
  			if (lp != null && mRecycler.shouldRecycleViewType(lp.viewType)) {
  				views.add(child);
  				if (listener != null) {
  					// Pretend they went through the scrap heap
  					listener.onMovedToScrapHeap(child);
  				}
  			}
  		}
  		mRecycler.reclaimScrapViews(views);
  		removeAllViewsInLayout();
  	}
  
  	/**
  	 * @hide
  	 */
  	protected boolean checkConsistency(int consistency) {
  		boolean result = true;
  
  		// The active recycler must be empty
  		final View[] activeViews = mRecycler.mActiveViews;
  		int count = activeViews.length;
  		for (int i = 0; i < count; i++) {
  			if (activeViews[i] != null) {
  				result = false;
  				Log.d(CONSISTENCY,
  						"AbsListView " + this + " has a view in its active recycler: " +
  						activeViews[i]);
  			}
  		}
  
  		// All views in the recycler must NOT be on screen and must NOT have a parent
  		final ArrayList<View> scrap = mRecycler.mCurrentScrap;
  		if (!checkScrap(scrap)) result = false;
  		final ArrayList<View>[] scraps = mRecycler.mScrapViews;
  		count = scraps.length;
  		for (int i = 0; i < count; i++) {
  			if (!checkScrap(scraps[i])) result = false;
  		}
  
  		return result;
  	}
  
  	private boolean checkScrap(ArrayList<View> scrap) {
  		if (scrap == null) return true;
  		boolean result = true;
  
  		final int count = scrap.size();
  		for (int i = 0; i < count; i++) {
  			final View view = scrap.get(i);
  			if (view.getParent() != null) {
  				result = false;
  				Log.d(CONSISTENCY, "TwoWayAbsListView " + this +
  						" has a view in its scrap heap still attached to a parent: " + view);
  			}
  			if (indexOfChild(view) >= 0) {
  				result = false;
  				Log.d(CONSISTENCY, "TwoWayAbsListView " + this +
  						" has a view in its scrap heap that is also a direct child: " + view);
  			}
  		}
  
  		return result;
  	}
  
  	/**
  	 * Sets the recycler listener to be notified whenever a View is set aside in
  	 * the recycler for later reuse. This listener can be used to free resources
  	 * associated to the View.
  	 *
  	 * @param listener The recycler listener to be notified of views set aside
  	 *        in the recycler.
  	 *
  	 * @see com.jess.ui.TwoWayAbsListView.RecycleBin
  	 * @see com.jess.ui.TwoWayAbsListView.RecyclerListener
  	 */
  	public void setRecyclerListener(RecyclerListener listener) {
  		mRecycler.mRecyclerListener = listener;
  	}
  
  	/**
  	 * TwoWayAbsListView extends LayoutParams to provide a place to hold the view type.
  	 */
  	public static class LayoutParams extends ViewGroup.LayoutParams {
  		/**
  		 * View type for this view, as returned by
  		 * {@link android.widget.Adapter#getItemViewType(int) }
  		 */
  		@ViewDebug.ExportedProperty(mapping = {
  				@ViewDebug.IntToString(from = ITEM_VIEW_TYPE_IGNORE, to = "ITEM_VIEW_TYPE_IGNORE"),
  				@ViewDebug.IntToString(from = ITEM_VIEW_TYPE_HEADER_OR_FOOTER, to = "ITEM_VIEW_TYPE_HEADER_OR_FOOTER")
  		})
  		int viewType;
  
  		/**
  		 * When this boolean is set, the view has been added to the TwoWayAbsListView
  		 * at least once. It is used to know whether headers/footers have already
  		 * been added to the list view and whether they should be treated as
  		 * recycled views or not.
  		 */
  		@ViewDebug.ExportedProperty
  		boolean recycledHeaderFooter;
  
  		/**
  		 * When an TwoWayAbsListView is measured with an AT_MOST measure spec, it needs
  		 * to obtain children views to measure itself. When doing so, the children
  		 * are not attached to the window, but put in the recycler which assumes
  		 * they've been attached before. Setting this flag will force the reused
  		 * view to be attached to the window rather than just attached to the
  		 * parent.
  		 */
  		@ViewDebug.ExportedProperty
  		boolean forceAdd;
  
  		public LayoutParams(Context c, AttributeSet attrs) {
  			super(c, attrs);
  		}
  
  		public LayoutParams(int w, int h) {
  			super(w, h);
  		}
  
  		public LayoutParams(int w, int h, int viewType) {
  			super(w, h);
  			this.viewType = viewType;
  		}
  
  		public LayoutParams(ViewGroup.LayoutParams source) {
  			super(source);
  		}
  	}
  
  	/**
  	 * A RecyclerListener is used to receive a notification whenever a View is placed
  	 * inside the RecycleBin's scrap heap. This listener is used to free resources
  	 * associated to Views placed in the RecycleBin.
  	 *
  	 * @see com.jess.ui.TwoWayAbsListView.RecycleBin
  	 * @see com.jess.ui.TwoWayAbsListView#setRecyclerListener(com.jess.ui.TwoWayAbsListView.RecyclerListener)
  	 */
  	public static interface RecyclerListener {
  		/**
  		 * Indicates that the specified View was moved into the recycler's scrap heap.
  		 * The view is not displayed on screen any more and any expensive resource
  		 * associated with the view should be discarded.
  		 *
  		 * @param view
  		 */
  		void onMovedToScrapHeap(View view);
  	}
  
  	/**
  	 * The RecycleBin facilitates reuse of views across layouts. The RecycleBin has two levels of
  	 * storage: ActiveViews and ScrapViews. ActiveViews are those views which were onscreen at the
  	 * start of a layout. By construction, they are displaying current information. At the end of
  	 * layout, all views in ActiveViews are demoted to ScrapViews. ScrapViews are old views that
  	 * could potentially be used by the adapter to avoid allocating views unnecessarily.
  	 *
  	 * @see com.jess.ui.TwoWayAbsListView#setRecyclerListener(com.jess.ui.TwoWayAbsListView.RecyclerListener)
  	 * @see com.jess.ui.TwoWayAbsListView.RecyclerListener
  	 */
  	class RecycleBin {
  		private RecyclerListener mRecyclerListener;
  
  		/**
  		 * The position of the first view stored in mActiveViews.
  		 */
  		private int mFirstActivePosition;
  
  		/**
  		 * Views that were on screen at the start of layout. This array is populated at the start of
  		 * layout, and at the end of layout all view in mActiveViews are moved to mScrapViews.
  		 * Views in mActiveViews represent a contiguous range of Views, with position of the first
  		 * view store in mFirstActivePosition.
  		 */
  		private View[] mActiveViews = new View[0];
  
  		/**
  		 * Unsorted views that can be used by the adapter as a convert view.
  		 */
  		private ArrayList<View>[] mScrapViews;
  
  		private int mViewTypeCount;
  
  		private ArrayList<View> mCurrentScrap;
  
  		public void setViewTypeCount(int viewTypeCount) {
  			if (viewTypeCount < 1) {
  				throw new IllegalArgumentException("Can't have a viewTypeCount < 1");
  			}
  			//noinspection unchecked
  			ArrayList<View>[] scrapViews = new ArrayList[viewTypeCount];
  			for (int i = 0; i < viewTypeCount; i++) {
  				scrapViews[i] = new ArrayList<View>();
  			}
  			mViewTypeCount = viewTypeCount;
  			mCurrentScrap = scrapViews[0];
  			mScrapViews = scrapViews;
  		}
  
  		public void markChildrenDirty() {
  			if (mViewTypeCount == 1) {
  				final ArrayList<View> scrap = mCurrentScrap;
  				final int scrapCount = scrap.size();
  				for (int i = 0; i < scrapCount; i++) {
  					scrap.get(i).forceLayout();
  				}
  			} else {
  				final int typeCount = mViewTypeCount;
  				for (int i = 0; i < typeCount; i++) {
  					final ArrayList<View> scrap = mScrapViews[i];
  					final int scrapCount = scrap.size();
  					for (int j = 0; j < scrapCount; j++) {
  						scrap.get(j).forceLayout();
  					}
  				}
  			}
  		}
  
  		public boolean shouldRecycleViewType(int viewType) {
  			return viewType >= 0;
  		}
  
  		/**
  		 * Clears the scrap heap.
  		 */
  		void clear() {
  			if (mViewTypeCount == 1) {
  				final ArrayList<View> scrap = mCurrentScrap;
  				final int scrapCount = scrap.size();
  				for (int i = 0; i < scrapCount; i++) {
  					removeDetachedView(scrap.remove(scrapCount - 1 - i), false);
  				}
  			} else {
  				final int typeCount = mViewTypeCount;
  				for (int i = 0; i < typeCount; i++) {
  					final ArrayList<View> scrap = mScrapViews[i];
  					final int scrapCount = scrap.size();
  					for (int j = 0; j < scrapCount; j++) {
  						removeDetachedView(scrap.remove(scrapCount - 1 - j), false);
  					}
  				}
  			}
  		}
  
  		/**
  		 * Fill ActiveViews with all of the children of the TwoWayAbsListView.
  		 *
  		 * @param childCount The minimum number of views mActiveViews should hold
  		 * @param firstActivePosition The position of the first view that will be stored in
  		 *        mActiveViews
  		 */
  		void fillActiveViews(int childCount, int firstActivePosition) {
  			if (mActiveViews.length < childCount) {
  				mActiveViews = new View[childCount];
  			}
  			mFirstActivePosition = firstActivePosition;
  
  			final View[] activeViews = mActiveViews;
  			for (int i = 0; i < childCount; i++) {
  				View child = getChildAt(i);
  				TwoWayAbsListView.LayoutParams lp = (TwoWayAbsListView.LayoutParams) child.getLayoutParams();
  				// Don't put header or footer views into the scrap heap
  				if (lp != null && lp.viewType != ITEM_VIEW_TYPE_HEADER_OR_FOOTER) {
  					// Note:  We do place TwoWayAdapterView.ITEM_VIEW_TYPE_IGNORE in active views.
  					//        However, we will NOT place them into scrap views.
  					activeViews[i] = child;
  				}
  			}
  		}
  
  		/**
  		 * Get the view corresponding to the specified position. The view will be removed from
  		 * mActiveViews if it is found.
  		 *
  		 * @param position The position to look up in mActiveViews
  		 * @return The view if it is found, null otherwise
  		 */
  		View getActiveView(int position) {
  			int index = position - mFirstActivePosition;
  			final View[] activeViews = mActiveViews;
  			if (index >=0 && index < activeViews.length) {
  				final View match = activeViews[index];
  				activeViews[index] = null;
  				return match;
  			}
  			return null;
  		}
  
  		/**
  		 * @return A view from the ScrapViews collection. These are unordered.
  		 */
  		View getScrapView(int position) {
  			ArrayList<View> scrapViews;
  			if (mViewTypeCount == 1) {
  				scrapViews = mCurrentScrap;
  				int size = scrapViews.size();
  				if (size > 0) {
  					return scrapViews.remove(size - 1);
  				} else {
  					return null;
  				}
  			} else {
  				int whichScrap = mAdapter.getItemViewType(position);
  				if (whichScrap >= 0 && whichScrap < mScrapViews.length) {
  					scrapViews = mScrapViews[whichScrap];
  					int size = scrapViews.size();
  					if (size > 0) {
  						return scrapViews.remove(size - 1);
  					}
  				}
  			}
  			return null;
  		}
  
  		/**
  		 * Put a view into the ScapViews list. These views are unordered.
  		 *
  		 * @param scrap The view to add
  		 */
  		void addScrapView(View scrap) {
  			TwoWayAbsListView.LayoutParams lp = (TwoWayAbsListView.LayoutParams) scrap.getLayoutParams();
  			if (lp == null) {
  				return;
  			}
  
  			// Don't put header or footer views or views that should be ignored
  			// into the scrap heap
  			int viewType = lp.viewType;
  			if (!shouldRecycleViewType(viewType)) {
  				if (viewType != ITEM_VIEW_TYPE_HEADER_OR_FOOTER) {
  					removeDetachedView(scrap, false);
  				}
  				return;
  			}
  
  			if (mViewTypeCount == 1) {
  				scrap.onStartTemporaryDetach();
  				mCurrentScrap.add(scrap);
  			} else {
  				scrap.onStartTemporaryDetach();
  				mScrapViews[viewType].add(scrap);
  			}
  
  			if (mRecyclerListener != null) {
  				mRecyclerListener.onMovedToScrapHeap(scrap);
  			}
  		}
  
  		/**
  		 * Move all views remaining in mActiveViews to mScrapViews.
  		 */
  		void scrapActiveViews() {
  			final View[] activeViews = mActiveViews;
  			final boolean hasListener = mRecyclerListener != null;
  			final boolean multipleScraps = mViewTypeCount > 1;
  
  			ArrayList<View> scrapViews = mCurrentScrap;
  			final int count = activeViews.length;
  			for (int i = count - 1; i >= 0; i--) {
  				final View victim = activeViews[i];
  				if (victim != null) {
  					int whichScrap = ((TwoWayAbsListView.LayoutParams) victim.getLayoutParams()).viewType;
  
  					activeViews[i] = null;
  
  					if (!shouldRecycleViewType(whichScrap)) {
  						// Do not move views that should be ignored
  						if (whichScrap != ITEM_VIEW_TYPE_HEADER_OR_FOOTER) {
  							removeDetachedView(victim, false);
  						}
  						continue;
  					}
  
  					if (multipleScraps) {
  						scrapViews = mScrapViews[whichScrap];
  					}
  					victim.onStartTemporaryDetach();
  					scrapViews.add(victim);
  
  					if (hasListener) {
  						mRecyclerListener.onMovedToScrapHeap(victim);
  					}
  
  					if (ViewDebug.TRACE_RECYCLER) {
  						ViewDebug.trace(victim,
  								ViewDebug.RecyclerTraceType.MOVE_FROM_ACTIVE_TO_SCRAP_HEAP,
  								mFirstActivePosition + i, -1);
  					}
  				}
  			}
  
  			pruneScrapViews();
  		}
  
  		/**
  		 * Makes sure that the size of mScrapViews does not exceed the size of mActiveViews.
  		 * (This can happen if an adapter does not recycle its views).
  		 */
  		private void pruneScrapViews() {
  			final int maxViews = mActiveViews.length;
  			final int viewTypeCount = mViewTypeCount;
  			final ArrayList<View>[] scrapViews = mScrapViews;
  			for (int i = 0; i < viewTypeCount; ++i) {
  				final ArrayList<View> scrapPile = scrapViews[i];
  				int size = scrapPile.size();
  				final int extras = size - maxViews;
  				size--;
  				for (int j = 0; j < extras; j++) {
  					removeDetachedView(scrapPile.remove(size--), false);
  				}
  			}
  		}
  
  		/**
  		 * Puts all views in the scrap heap into the supplied list.
  		 */
  		void reclaimScrapViews(List<View> views) {
  			if (mViewTypeCount == 1) {
  				views.addAll(mCurrentScrap);
  			} else {
  				final int viewTypeCount = mViewTypeCount;
  				final ArrayList<View>[] scrapViews = mScrapViews;
  				for (int i = 0; i < viewTypeCount; ++i) {
  					final ArrayList<View> scrapPile = scrapViews[i];
  					views.addAll(scrapPile);
  				}
  			}
  		}
  
  		/**
  		 * Updates the cache color hint of all known views.
  		 *
  		 * @param color The new cache color hint.
  		 */
  		void setCacheColorHint(int color) {
  			if (mViewTypeCount == 1) {
  				final ArrayList<View> scrap = mCurrentScrap;
  				final int scrapCount = scrap.size();
  				for (int i = 0; i < scrapCount; i++) {
  					scrap.get(i).setDrawingCacheBackgroundColor(color);
  				}
  			} else {
  				final int typeCount = mViewTypeCount;
  				for (int i = 0; i < typeCount; i++) {
  					final ArrayList<View> scrap = mScrapViews[i];
  					final int scrapCount = scrap.size();
  					for (int j = 0; j < scrapCount; j++) {
  						scrap.get(i).setDrawingCacheBackgroundColor(color);
  					}
  				}
  			}
  			// Just in case this is called during a layout pass
  			final View[] activeViews = mActiveViews;
  			final int count = activeViews.length;
  			for (int i = 0; i < count; ++i) {
  				final View victim = activeViews[i];
  				if (victim != null) {
  					victim.setDrawingCacheBackgroundColor(color);
  				}
  			}
  		}
  	}
  
  
  
  
  
  	////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
  	//  Touch Handler
  	////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
  
  	abstract class TouchHandler {
  		/**
  		 * Handles scrolling between positions within the list.
  		 */
  		protected PositionScroller mPositionScroller;
  
  		/**
  		 * Handles one frame of a fling
  		 */
  		protected FlingRunnable mFlingRunnable;
  
  		/**
  		 * How far the finger moved before we started scrolling
  		 */
  		int mMotionCorrection;
  
  		public void onWindowFocusChanged(boolean hasWindowFocus) {
  
  			final int touchMode = isInTouchMode() ? TOUCH_MODE_ON : TOUCH_MODE_OFF;
  
  			if (!hasWindowFocus) {
  				setChildrenDrawingCacheEnabled(false);
  				if (mFlingRunnable != null) {
  					removeCallbacks(mFlingRunnable);
  					// let the fling runnable report it's new state which
  					// should be idle
  					mFlingRunnable.endFling();
  					//TODO: this doesn't seem the right way to do this.
  					if (getScrollY() != 0) {
  						scrollTo(getScrollX(), 0);
  						//mScrollY = 0;
  						invalidate();
  					}
  				}
  				// Always hide the type filter
  				//dismissPopup();
  
  				if (touchMode == TOUCH_MODE_OFF) {
  					// Remember the last selected element
  					mResurrectToPosition = mSelectedPosition;
  				}
  			} else {
  				//if (mFiltered && !mPopupHidden) {
  				// Show the type filter only if a filter is in effect
  				//    showPopup();
  				//}
  
  				// If we changed touch mode since the last time we had focus
  				if (touchMode != mLastTouchMode && mLastTouchMode != TOUCH_MODE_UNKNOWN) {
  					// If we come back in trackball mode, we bring the selection back
  					if (touchMode == TOUCH_MODE_OFF) {
  						// This will trigger a layout
  						resurrectSelection();
  
  						// If we come back in touch mode, then we want to hide the selector
  					} else {
  						hideSelector();
  						mLayoutMode = LAYOUT_NORMAL;
  						layoutChildren();
  					}
  				}
  			}
  
  			mLastTouchMode = touchMode;
  		}
  
  
  		public boolean startScrollIfNeeded(int delta) {
  			// Check if we have moved far enough that it looks more like a
  			// scroll than a tap
  			final int distance = Math.abs(delta);
  			if (distance > mTouchSlop) {
  				createScrollingCache();
  				mTouchMode = TOUCH_MODE_SCROLL;
  				mMotionCorrection = delta;
  				final Handler handler = getHandler();
  				// Handler should not be null unless the TwoWayAbsListView is not attached to a
  				// window, which would make it very hard to scroll it... but the monkeys
  				// say it's possible.
  				if (handler != null) {
  					handler.removeCallbacks(mPendingCheckForLongPress);
  				}
  				setPressed(false);
  				View motionView = getChildAt(mMotionPosition - mFirstPosition);
  				if (motionView != null) {
  					motionView.setPressed(false);
  				}
  				reportScrollStateChange(OnScrollListener.SCROLL_STATE_TOUCH_SCROLL);
  				// Time to start stealing events! Once we've stolen them, don't let anyone
  				// steal from us
  				requestDisallowInterceptTouchEvent(true);
  				return true;
  			}
  
  			return false;
  		}
  
  
  		public void onTouchModeChanged(boolean isInTouchMode) {
  			if (isInTouchMode) {
  				// Get rid of the selection when we enter touch mode
  				hideSelector();
  				// Layout, but only if we already have done so previously.
  				// (Otherwise may clobber a LAYOUT_SYNC layout that was requested to restore
  				// state.)
  				if (getHeight() > 0 && getChildCount() > 0) {
  					// We do not lose focus initiating a touch (since TwoWayAbsListView is focusable in
  					// touch mode). Force an initial layout to get rid of the selection.
  					layoutChildren();
  				}
  			}
  		}
  
  		/**
  		 * Fires an "on scroll state changed" event to the registered
  		 * {@link com.jess.ui.TwoWayAbsListView.OnScrollListener}, if any. The state change
  		 * is fired only if the specified state is different from the previously known state.
  		 *
  		 * @param newState The new scroll state.
  		 */
  		void reportScrollStateChange(int newState) {
  			if (newState != mLastScrollState && mOnScrollListener != null) {
  				mOnScrollListener.onScrollStateChanged(TwoWayAbsListView.this, newState);
  				mLastScrollState = newState;
  			}
  		}
  
  		/**
  		 * Smoothly scroll to the specified adapter position. The view will
  		 * scroll such that the indicated position is displayed.
  		 * @param position Scroll to this adapter position.
  		 */
  		public void smoothScrollToPosition(int position) {
  			if (mPositionScroller == null) {
  				mPositionScroller = getPositionScroller();
  			}
  			mPositionScroller.start(position);
  		}
  
  		/**
  		 * Smoothly scroll to the specified adapter position. The view will
  		 * scroll such that the indicated position is displayed, but it will
  		 * stop early if scrolling further would scroll boundPosition out of
  		 * view.
  		 * @param position Scroll to this adapter position.
  		 * @param boundPosition Do not scroll if it would move this adapter
  		 *          position out of view.
  		 */
  		public void smoothScrollToPosition(int position, int boundPosition) {
  			if (mPositionScroller == null) {
  				mPositionScroller = getPositionScroller();
  			}
  			mPositionScroller.start(position, boundPosition);
  		}
  
  		/**
  		 * Smoothly scroll by distance pixels over duration milliseconds.
  		 * @param distance Distance to scroll in pixels.
  		 * @param duration Duration of the scroll animation in milliseconds.
  		 */
  		public void smoothScrollBy(int distance, int duration) {
  			if (mFlingRunnable == null) {
  				mFlingRunnable = getFlingRunnable();
  			} else {
  				mFlingRunnable.endFling();
  			}
  			mFlingRunnable.startScroll(distance, duration);
  		}
  
  		protected void createScrollingCache() {
  			if (mScrollingCacheEnabled && !mCachingStarted) {
  				setChildrenDrawnWithCacheEnabled(true);
  				setChildrenDrawingCacheEnabled(true);
  				mCachingStarted = true;
  			}
  		}
  
  		protected void clearScrollingCache() {
  			if (mClearScrollingCache == null) {
  				mClearScrollingCache = new Runnable() {
  					public void run() {
  						if (mCachingStarted) {
  							mCachingStarted = false;
  							setChildrenDrawnWithCacheEnabled(false);
  							if ((TwoWayAbsListView.this.getPersistentDrawingCache() & PERSISTENT_SCROLLING_CACHE) == 0) {
  								setChildrenDrawingCacheEnabled(false);
  							}
  							if (!isAlwaysDrawnWithCacheEnabled()) {
  								invalidate();
  							}
  						}
  					}
  				};
  			}
  			post(mClearScrollingCache);
  		}
  
  		/**
  		 * Track a motion scroll
  		 *
  		 * @param delta Amount to offset mMotionView. This is the accumulated delta since the motion
  		 *        began. Positive numbers mean the user's finger is moving down or right on the screen.
  		 * @param incrementalDelta Change in delta from the previous event.
  		 * @return true if we're already at the beginning/end of the list and have nothing to do.
  		 */
  		abstract boolean trackMotionScroll(int delta, int incrementalDelta);
  
  		/**
  		 * Attempt to bring the selection back if the user is switching from touch
  		 * to trackball mode
  		 * @return Whether selection was set to something.
  		 */
  		abstract boolean resurrectSelection();
  
  
  		public abstract boolean onTouchEvent(MotionEvent ev);
  
  
  		public abstract boolean onInterceptTouchEvent(MotionEvent ev);
  
  		protected abstract PositionScroller getPositionScroller();
  
  		protected abstract FlingRunnable getFlingRunnable();
  
  		/**
  		 * Responsible for fling behavior. Use {@link #start(int)} to
  		 * initiate a fling. Each frame of the fling is handled in {@link #run()}.
  		 * A FlingRunnable will keep re-posting itself until the fling is done.
  		 *
  		 */
  		protected abstract class FlingRunnable implements Runnable {
  			/**
  			 * Tracks the decay of a fling scroll
  			 */
  			protected final Scroller mScroller;
  
  			protected Runnable mCheckFlywheel;
  			
  			public boolean isScrollingInDirection(float xvel, float yvel) {
  				final int dx = mScroller.getFinalX() - mScroller.getStartX();
  				final int dy = mScroller.getFinalY() - mScroller.getStartY();
  				return !mScroller.isFinished() && Math.signum(xvel) == Math.signum(dx) &&
  						Math.signum(yvel) == Math.signum(dy);
  			}
  
  
  			FlingRunnable() {
  				mScroller = new Scroller(getContext());
  			}
  
  			abstract void flywheelTouch();
  
  			abstract void start(int initialVelocity);
  
  			abstract void startScroll(int distance, int duration);
  
  			protected void endFling() {
  				mTouchMode = TOUCH_MODE_REST;
  
  				reportScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE);
  				clearScrollingCache();
  
  				removeCallbacks(this);
  				
  				if (mCheckFlywheel != null) {
  					removeCallbacks(mCheckFlywheel);
  				}
  				if (mPositionScroller != null) {
  					removeCallbacks(mPositionScroller);
  				}
  
  				mScroller.abortAnimation();
  			}
  
  			public abstract void run();
  		}
  
  		abstract class PositionScroller implements Runnable {
  			protected static final int SCROLL_DURATION = 400;
  
  			protected static final int MOVE_DOWN_POS = 1;
  			protected static final int MOVE_UP_POS = 2;
  			protected static final int MOVE_DOWN_BOUND = 3;
  			protected static final int MOVE_UP_BOUND = 4;
  
  			protected boolean mVertical;
  			protected int mMode;
  			protected int mTargetPos;
  			protected int mBoundPos;
  			protected int mLastSeenPos;
  			protected int mScrollDuration;
  			protected final int mExtraScroll;
  
  			PositionScroller() {
  				mExtraScroll = ViewConfiguration.get(mContext).getScaledFadingEdgeLength();
  			}
  
  			void start(int position) {
  				final int firstPos = mFirstPosition;
  				final int lastPos = firstPos + getChildCount() - 1;
  
  				int viewTravelCount;
  				if (position <= firstPos) {
  					viewTravelCount = firstPos - position + 1;
  					mMode = MOVE_UP_POS;
  				} else if (position >= lastPos) {
  					viewTravelCount = position - lastPos + 1;
  					mMode = MOVE_DOWN_POS;
  				} else {
  					// Already on screen, nothing to do
  					return;
  				}
  
  				if (viewTravelCount > 0) {
  					mScrollDuration = SCROLL_DURATION / viewTravelCount;
  				} else {
  					mScrollDuration = SCROLL_DURATION;
  				}
  				mTargetPos = position;
  				mBoundPos = INVALID_POSITION;
  				mLastSeenPos = INVALID_POSITION;
  
  				post(this);
  			}
  
  			void start(int position, int boundPosition) {
  				if (boundPosition == INVALID_POSITION) {
  					start(position);
  					return;
  				}
  
  				final int firstPos = mFirstPosition;
  				final int lastPos = firstPos + getChildCount() - 1;
  
  				int viewTravelCount;
  				if (position <= firstPos) {
  					final int boundPosFromLast = lastPos - boundPosition;
  					if (boundPosFromLast < 1) {
  						// Moving would shift our bound position off the screen. Abort.
  						return;
  					}
  
  					final int posTravel = firstPos - position + 1;
  					final int boundTravel = boundPosFromLast - 1;
  					if (boundTravel < posTravel) {
  						viewTravelCount = boundTravel;
  						mMode = MOVE_UP_BOUND;
  					} else {
  						viewTravelCount = posTravel;
  						mMode = MOVE_UP_POS;
  					}
  				} else if (position >= lastPos) {
  					final int boundPosFromFirst = boundPosition - firstPos;
  					if (boundPosFromFirst < 1) {
  						// Moving would shift our bound position off the screen. Abort.
  						return;
  					}
  
  					final int posTravel = position - lastPos + 1;
  					final int boundTravel = boundPosFromFirst - 1;
  					if (boundTravel < posTravel) {
  						viewTravelCount = boundTravel;
  						mMode = MOVE_DOWN_BOUND;
  					} else {
  						viewTravelCount = posTravel;
  						mMode = MOVE_DOWN_POS;
  					}
  				} else {
  					// Already on screen, nothing to do
  					return;
  				}
  
  				if (viewTravelCount > 0) {
  					mScrollDuration = SCROLL_DURATION / viewTravelCount;
  				} else {
  					mScrollDuration = SCROLL_DURATION;
  				}
  				mTargetPos = position;
  				mBoundPos = boundPosition;
  				mLastSeenPos = INVALID_POSITION;
  
  				post(this);
  			}
  
  			void stop() {
  				removeCallbacks(this);
  			}
  
  			public abstract void run();
  		}
  
  
  	}
  
  
  
  
  
  
  	////////////////////////////////////////////////////////////////////////////////////////
  	//  Vertical Touch Handler
  	////////////////////////////////////////////////////////////////////////////////////////
  
  	class VerticalTouchHandler extends TouchHandler {
  		/**
  		 * The offset to the top of the mMotionPosition view when the down motion event was received
  		 */
  		int mMotionViewOriginalTop;
  
  		/**
  		 * Y value from on the previous motion event (if any)
  		 */
  		int mLastY;
  
  		/**
  		 * The desired offset to the top of the mMotionPosition view after a scroll
  		 */
  		int mMotionViewNewTop;
  
  		@Override
  		public boolean onTouchEvent(MotionEvent ev) {
  			if (!isEnabled()) {
  				// A disabled view that is clickable still consumes the touch
  				// events, it just doesn't respond to them.
  				return isClickable() || isLongClickable();
  			}
  
  			/*
              if (mFastScroller != null) {
                  boolean intercepted = mFastScroller.onTouchEvent(ev);
                  if (intercepted) {
                      return true;
                  }
              }*/
  
  			final int action = ev.getAction();
  
  			View v;
  			int deltaY;
  
  			if (mVelocityTracker == null) {
  				mVelocityTracker = VelocityTracker.obtain();
  			}
  			mVelocityTracker.addMovement(ev);
  
  			switch (action) {
  			case MotionEvent.ACTION_DOWN: {
  				final int x = (int) ev.getX();
  				final int y = (int) ev.getY();
  				int motionPosition = pointToPosition(x, y);
  				if (!mDataChanged) {
  					if ((mTouchMode != TOUCH_MODE_FLING) && (motionPosition >= 0)
  							&& (getAdapter().isEnabled(motionPosition))) {
  						// User clicked on an actual view (and was not stopping a fling). It might be a
  						// click or a scroll. Assume it is a click until proven otherwise
  						mTouchMode = TOUCH_MODE_DOWN;
  						// FIXME Debounce
  						if (mPendingCheckForTap == null) {
  							mPendingCheckForTap = new CheckForTap();
  						}
  						postDelayed(mPendingCheckForTap, ViewConfiguration.getTapTimeout());
  					} else {
  						if (ev.getEdgeFlags() != 0 && motionPosition < 0) {
  							// If we couldn't find a view to click on, but the down event was touching
  							// the edge, we will bail out and try again. This allows the edge correcting
  							// code in ViewRoot to try to find a nearby view to select
  							return false;
  						}
  
  						if (mTouchMode == TOUCH_MODE_FLING) {
  							// Stopped a fling. It is a scroll.
  							createScrollingCache();
  							mTouchMode = TOUCH_MODE_SCROLL;
  							mMotionCorrection = 0;
  							motionPosition = findMotionRowY(y);
  							mFlingRunnable.flywheelTouch();
  						}
  					}
  				}
  
  				if (motionPosition >= 0) {
  					// Remember where the motion event started
  					v = getChildAt(motionPosition - mFirstPosition);
  					mMotionViewOriginalTop = v.getTop();
  				}
  				mMotionX = x;
  				mMotionY = y;
  				mMotionPosition = motionPosition;
  				mLastY = Integer.MIN_VALUE;
  				break;
  			}
  
  			case MotionEvent.ACTION_MOVE: {
  				final int y = (int) ev.getY();
  				deltaY = y - mMotionY;
  				switch (mTouchMode) {
  				case TOUCH_MODE_DOWN:
  				case TOUCH_MODE_TAP:
  				case TOUCH_MODE_DONE_WAITING:
  					// Check if we have moved far enough that it looks more like a
  					// scroll than a tap
  					startScrollIfNeeded(deltaY);
  					break;
  				case TOUCH_MODE_SCROLL:
  					if (PROFILE_SCROLLING && !mScrollProfilingStarted) {
  						Debug.startMethodTracing("JessAbsListViewScroll");
  						mScrollProfilingStarted = true;
  					}
  
  					if (y != mLastY) {
  						deltaY -= mMotionCorrection;
  						int incrementalDeltaY = mLastY != Integer.MIN_VALUE ? y - mLastY : deltaY;
  
  						// No need to do all this work if we're not going to move anyway
  						boolean atEdge = false;
  						if (incrementalDeltaY != 0) {
  							atEdge = trackMotionScroll(deltaY, incrementalDeltaY);
  						}
  
  						// Check to see if we have bumped into the scroll limit
  						if (atEdge && getChildCount() > 0) {
  							// Treat this like we're starting a new scroll from the current
  							// position. This will let the user start scrolling back into
  							// content immediately rather than needing to scroll back to the
  							// point where they hit the limit first.
  							int motionPosition = findMotionRowY(y);
  							if (motionPosition >= 0) {
  								final View motionView = getChildAt(motionPosition - mFirstPosition);
  								mMotionViewOriginalTop = motionView.getTop();
  							}
  							mMotionY = y;
  							mMotionPosition = motionPosition;
  							invalidate();
  						}
  						mLastY = y;
  					}
  					break;
  				}
  
  				break;
  			}
  
  			case MotionEvent.ACTION_UP: {
  				switch (mTouchMode) {
  				case TOUCH_MODE_DOWN:
  				case TOUCH_MODE_TAP:
  				case TOUCH_MODE_DONE_WAITING:
  					final int motionPosition = mMotionPosition;
  					final View child = getChildAt(motionPosition - mFirstPosition);
  					if (child != null && !child.hasFocusable()) {
  						if (mTouchMode != TOUCH_MODE_DOWN) {
  							child.setPressed(false);
  						}
  
  						if (mPerformClick == null) {
  							mPerformClick = new PerformClick();
  						}
  
  						final TwoWayAbsListView.PerformClick performClick = mPerformClick;
  						performClick.mChild = child;
  						performClick.mClickMotionPosition = motionPosition;
  						performClick.rememberWindowAttachCount();
  
  						mResurrectToPosition = motionPosition;
  
  						if (mTouchMode == TOUCH_MODE_DOWN || mTouchMode == TOUCH_MODE_TAP) {
  							final Handler handler = getHandler();
  							if (handler != null) {
  								handler.removeCallbacks(mTouchMode == TOUCH_MODE_DOWN ?
  										mPendingCheckForTap : mPendingCheckForLongPress);
  							}
  							mLayoutMode = LAYOUT_NORMAL;
  							if (!mDataChanged && mAdapter.isEnabled(motionPosition)) {
  								mTouchMode = TOUCH_MODE_TAP;
  								setSelectedPositionInt(mMotionPosition);
  								layoutChildren();
  								child.setPressed(true);
  								positionSelector(child);
  								setPressed(true);
  								if (mSelector != null) {
  									Drawable d = mSelector.getCurrent();
  									if (d != null && d instanceof TransitionDrawable) {
  										((TransitionDrawable) d).resetTransition();
  									}
  								}
  								postDelayed(new Runnable() {
  									public void run() {
  										child.setPressed(false);
  										setPressed(false);
  										if (!mDataChanged) {
  											post(performClick);
  										}
  										mTouchMode = TOUCH_MODE_REST;
  									}
  								}, ViewConfiguration.getPressedStateDuration());
  							} else {
  								mTouchMode = TOUCH_MODE_REST;
  							}
  							return true;
  						} else if (!mDataChanged && mAdapter.isEnabled(motionPosition)) {
  							post(performClick);
  						}
  					}
  					mTouchMode = TOUCH_MODE_REST;
  					break;
  				case TOUCH_MODE_SCROLL:
  					final int childCount = getChildCount();
  					if (childCount > 0) {
  						if (mFirstPosition == 0 && getChildAt(0).getTop() >= mListPadding.top &&
  								mFirstPosition + childCount < mItemCount &&
  								getChildAt(childCount - 1).getBottom() <=
  									getHeight() - mListPadding.bottom) {
  							mTouchMode = TOUCH_MODE_REST;
  							reportScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE);
  						} else {
  							final VelocityTracker velocityTracker = mVelocityTracker;
  							velocityTracker.computeCurrentVelocity(1000);
  							final int initialVelocity = (int) velocityTracker.getYVelocity();
  
  							if (Math.abs(initialVelocity) > mMinimumVelocity) {
  								if (mFlingRunnable == null) {
  									mFlingRunnable = new VerticalFlingRunnable();
  								}
  								reportScrollStateChange(OnScrollListener.SCROLL_STATE_FLING);
  
  								mFlingRunnable.start(-initialVelocity);
  							} else {
  								mTouchMode = TOUCH_MODE_REST;
  								reportScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE);
  							}
  						}
  					} else {
  						mTouchMode = TOUCH_MODE_REST;
  						reportScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE);
  					}
  					break;
  				}
  
  				setPressed(false);
  
  				// Need to redraw since we probably aren't drawing the selector anymore
  				invalidate();
  
  				final Handler handler = getHandler();
  				if (handler != null) {
  					handler.removeCallbacks(mPendingCheckForLongPress);
  				}
  
  				if (mVelocityTracker != null) {
  					mVelocityTracker.recycle();
  					mVelocityTracker = null;
  				}
  
  				mActivePointerId = INVALID_POINTER;
  
  				if (PROFILE_SCROLLING && mScrollProfilingStarted) {
  					Debug.stopMethodTracing();
  					mScrollProfilingStarted = false;
  				}
  				break;
  			}
  
  			case MotionEvent.ACTION_CANCEL: {
  				mTouchMode = TOUCH_MODE_REST;
  				setPressed(false);
  				View motionView = TwoWayAbsListView.this.getChildAt(mMotionPosition - mFirstPosition);
  				if (motionView != null) {
  					motionView.setPressed(false);
  				}
  				clearScrollingCache();
  
  				final Handler handler = getHandler();
  				if (handler != null) {
  					handler.removeCallbacks(mPendingCheckForLongPress);
  				}
  
  				if (mVelocityTracker != null) {
  					mVelocityTracker.recycle();
  					mVelocityTracker = null;
  				}
  
  				mActivePointerId = INVALID_POINTER;
  				break;
  			}
  
  			}
  
  			return true;
  		}
  
  
  
  		@Override
  		public boolean onInterceptTouchEvent(MotionEvent ev) {
  			int action = ev.getAction();
  			View v;
  
  			/*
              if (mFastScroller != null) {
                  boolean intercepted = mFastScroller.onInterceptTouchEvent(ev);
                  if (intercepted) {
                      return true;
                  }
              }*/
  
  			switch (action) {
  				case MotionEvent.ACTION_DOWN: {
  					int touchMode = mTouchMode;
  	
  					final int x = (int) ev.getX();
  					final int y = (int) ev.getY();
  					
  					int motionPosition = findMotionRowY(y);
  					if (touchMode != TOUCH_MODE_FLING && motionPosition >= 0) {
  						// User clicked on an actual view (and was not stopping a fling).
  						// Remember where the motion event started
  						v = getChildAt(motionPosition - mFirstPosition);
  						mMotionViewOriginalTop = v.getTop();
  						mMotionX = x;
  						mMotionY = y;
  						mMotionPosition = motionPosition;
  						mTouchMode = TOUCH_MODE_DOWN;
  						clearScrollingCache();
  					}
  					mLastY = Integer.MIN_VALUE;
  					initOrResetVelocityTracker();
  					mVelocityTracker.addMovement(ev);
  					if (touchMode == TOUCH_MODE_FLING) {
  						return true;
  					}
  					break;
  				}
  	
  				case MotionEvent.ACTION_MOVE: {
  					if (mTouchMode == TOUCH_MODE_DOWN) {
  						final int y = (int) ev.getY();
  						if (startScrollIfNeeded(y - mMotionY)) {
  							return true;
  						}
  						break;
  					}
  					break;
  				}
  	
  				case MotionEvent.ACTION_UP: {
  					mTouchMode = TOUCH_MODE_REST;
  					mActivePointerId = INVALID_POINTER;
  					reportScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE);
  					break;
  				}
  			}
  
  			return false;
  		}
  
  		/**
  		 * Track a motion scroll
  		 *
  		 * @param deltaY Amount to offset mMotionView. This is the accumulated delta since the motion
  		 *        began. Positive numbers mean the user's finger is moving down the screen.
  		 * @param incrementalDeltaY Change in deltaY from the previous event.
  		 * @return true if we're already at the beginning/end of the list and have nothing to do.
  		 */
  		@Override
  		boolean trackMotionScroll(int deltaY, int incrementalDeltaY) {
  			if (DEBUG) Log.i(TAG, "trackMotionScroll() - deltaY: " + deltaY + " incrDeltaY: " + incrementalDeltaY);
  			final int childCount = getChildCount();
  			if (childCount == 0) {
  				return true;
  			}
  
  			final int firstTop = getChildAt(0).getTop();
  			final int lastBottom = getChildAt(childCount - 1).getBottom();
  
  			final Rect listPadding = mListPadding;
  
  			// FIXME account for grid vertical spacing too?
  			final int spaceAbove = listPadding.top - firstTop;
  			final int end = getHeight() - listPadding.bottom;
  			final int spaceBelow = lastBottom - end;
  
  			final int height = getHeight() - getPaddingBottom() - getPaddingTop();
  			if (deltaY < 0) {
  				deltaY = Math.max(-(height - 1), deltaY);
  			} else {
  				deltaY = Math.min(height - 1, deltaY);
  			}
  
  			if (incrementalDeltaY < 0) {
  				incrementalDeltaY = Math.max(-(height - 1), incrementalDeltaY);
  			} else {
  				incrementalDeltaY = Math.min(height - 1, incrementalDeltaY);
  			}
  
  			final int firstPosition = mFirstPosition;
  
  			if (firstPosition == 0 && firstTop >= listPadding.top && deltaY >= 0) {
  				// Don't need to move views down if the top of the first position
  				// is already visible
  				return true;
  			}
  
  			if (firstPosition + childCount == mItemCount && lastBottom <= end && deltaY <= 0) {
  				// Don't need to move views up if the bottom of the last position
  				// is already visible
  				return true;
  			}
  
  			final boolean down = incrementalDeltaY < 0;
  
  			final boolean inTouchMode = isInTouchMode();
  			if (inTouchMode) {
  				hideSelector();
  			}
  
  			final int headerViewsCount = getHeaderViewsCount();
  			final int footerViewsStart = mItemCount - getFooterViewsCount();
  
  			int start = 0;
  			int count = 0;
  
  			if (down) {
  				final int top = listPadding.top - incrementalDeltaY;
  				for (int i = 0; i < childCount; i++) {
  					final View child = getChildAt(i);
  					if (child.getBottom() >= top) {
  						break;
  					} else {
  						count++;
  						int position = firstPosition + i;
  						if (position >= headerViewsCount && position < footerViewsStart) {
  							mRecycler.addScrapView(child);
  
  							if (ViewDebug.TRACE_RECYCLER) {
  								ViewDebug.trace(child,
  										ViewDebug.RecyclerTraceType.MOVE_TO_SCRAP_HEAP,
  										firstPosition + i, -1);
  							}
  						}
  					}
  				}
  			} else {
  				final int bottom = getHeight() - listPadding.bottom - incrementalDeltaY;
  				for (int i = childCount - 1; i >= 0; i--) {
  					final View child = getChildAt(i);
  					if (child.getTop() <= bottom) {
  						break;
  					} else {
  						start = i;
  						count++;
  						int position = firstPosition + i;
  						if (position >= headerViewsCount && position < footerViewsStart) {
  							mRecycler.addScrapView(child);
  
  							if (ViewDebug.TRACE_RECYCLER) {
  								ViewDebug.trace(child,
  										ViewDebug.RecyclerTraceType.MOVE_TO_SCRAP_HEAP,
  										firstPosition + i, -1);
  							}
  						}
  					}
  				}
  			}
  
  			mMotionViewNewTop = mMotionViewOriginalTop + deltaY;
  
  			mBlockLayoutRequests = true;
  
  			if (count > 0) {
  				detachViewsFromParent(start, count);
  			}
  			offsetChildrenTopAndBottom(incrementalDeltaY);
  
  			if (down) {
  				mFirstPosition += count;
  			}
  
  			invalidate();
  
  			final int absIncrementalDeltaY = Math.abs(incrementalDeltaY);
  			if (spaceAbove < absIncrementalDeltaY || spaceBelow < absIncrementalDeltaY) {
  				fillGap(down);
  			}
  
  			if (!inTouchMode && mSelectedPosition != INVALID_POSITION) {
  				final int childIndex = mSelectedPosition - mFirstPosition;
  				if (childIndex >= 0 && childIndex < getChildCount()) {
  					positionSelector(getChildAt(childIndex));
  				}
  			}
  
  			mBlockLayoutRequests = false;
  
  			invokeOnItemScrollListener();
  			//awakenScrollBars();
  
  			return false;
  		}
  
  		/**
  		 * Attempt to bring the selection back if the user is switching from touch
  		 * to trackball mode
  		 * @return Whether selection was set to something.
  		 */
  		@Override
  		boolean resurrectSelection() {
  			final int childCount = getChildCount();
  
  			if (childCount <= 0) {
  				return false;
  			}
  
  			int selectedTop = 0;
  			int selectedPos;
  			int childrenTop = mListPadding.top;
  			int childrenBottom = getBottom() - getTop() - mListPadding.bottom;
  			final int firstPosition = mFirstPosition;
  			final int toPosition = mResurrectToPosition;
  			boolean down = true;
  
  			if (toPosition >= firstPosition && toPosition < firstPosition + childCount) {
  				selectedPos = toPosition;
  
  				final View selected = getChildAt(selectedPos - mFirstPosition);
  				selectedTop = selected.getTop();
  				int selectedBottom = selected.getBottom();
  
  				// We are scrolled, don't get in the fade
  				if (selectedTop < childrenTop) {
  					selectedTop = childrenTop + getVerticalFadingEdgeLength();
  				} else if (selectedBottom > childrenBottom) {
  					selectedTop = childrenBottom - selected.getMeasuredHeight()
  					- getVerticalFadingEdgeLength();
  				}
  			} else {
  				if (toPosition < firstPosition) {
  					// Default to selecting whatever is first
  					selectedPos = firstPosition;
  					for (int i = 0; i < childCount; i++) {
  						final View v = getChildAt(i);
  						final int top = v.getTop();
  
  						if (i == 0) {
  							// Remember the position of the first item
  							selectedTop = top;
  							// See if we are scrolled at all
  							if (firstPosition > 0 || top < childrenTop) {
  								// If we are scrolled, don't select anything that is
  								// in the fade region
  								childrenTop += getVerticalFadingEdgeLength();
  							}
  						}
  						if (top >= childrenTop) {
  							// Found a view whose top is fully visisble
  							selectedPos = firstPosition + i;
  							selectedTop = top;
  							break;
  						}
  					}
  				} else {
  					final int itemCount = mItemCount;
  					down = false;
  					selectedPos = firstPosition + childCount - 1;
  
  					for (int i = childCount - 1; i >= 0; i--) {
  						final View v = getChildAt(i);
  						final int top = v.getTop();
  						final int bottom = v.getBottom();
  
  						if (i == childCount - 1) {
  							selectedTop = top;
  							if (firstPosition + childCount < itemCount || bottom > childrenBottom) {
  								childrenBottom -= getVerticalFadingEdgeLength();
  							}
  						}
  
  						if (bottom <= childrenBottom) {
  							selectedPos = firstPosition + i;
  							selectedTop = top;
  							break;
  						}
  					}
  				}
  			}
  
  			mResurrectToPosition = INVALID_POSITION;
  			removeCallbacks(mFlingRunnable);
  			mTouchMode = TOUCH_MODE_REST;
  			clearScrollingCache();
  			mSpecificTop = selectedTop;
  			selectedPos = lookForSelectablePosition(selectedPos, down);
  			if (selectedPos >= firstPosition && selectedPos <= getLastVisiblePosition()) {
  				mLayoutMode = LAYOUT_SPECIFIC;
  				setSelectionInt(selectedPos);
  				invokeOnItemScrollListener();
  			} else {
  				selectedPos = INVALID_POSITION;
  			}
  			reportScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE);
  
  			return selectedPos >= 0;
  		}
  
  
  
  		@Override
  		protected PositionScroller getPositionScroller() {
  			return new VerticalPositionScroller();
  		}
  
  		@Override
  		protected FlingRunnable getFlingRunnable() {
  			return new VerticalFlingRunnable();
  		}
  
  
  		/**
  		 * Responsible for fling behavior. Use {@link #start(int)} to
  		 * initiate a fling. Each frame of the fling is handled in {@link #run()}.
  		 * A FlingRunnable will keep re-posting itself until the fling is done.
  		 *
  		 */
  		private class VerticalFlingRunnable extends FlingRunnable {
  			/**
  			 * Y value reported by mScroller on the previous fling
  			 */
  			protected int mLastFlingY;
  
  			@Override
  			void start(int initialVelocity) {
  				int initialY = initialVelocity < 0 ? Integer.MAX_VALUE : 0;
  				mLastFlingY = initialY;
  				mScroller.fling(0, initialY, 0, initialVelocity,
  						0, Integer.MAX_VALUE, 0, Integer.MAX_VALUE);
  				mTouchMode = TOUCH_MODE_FLING;
  				post(this);
  
  				if (PROFILE_FLINGING && !mFlingProfilingStarted) {
  					Debug.startMethodTracing("AbsListViewFling");
  					mFlingProfilingStarted = true;
  				}
  			}
  
  			@Override
  			void startScroll(int distance, int duration) {
  				int initialY = distance < 0 ? Integer.MAX_VALUE : 0;
  				mLastFlingY = initialY;
  				mScroller.startScroll(0, initialY, 0, distance, duration);
  				mTouchMode = TOUCH_MODE_FLING;
  				post(this);
  			}
  
  			@Override
  			public void run() {
  				if (mTouchMode == TOUCH_MODE_FLING) {
  					if (mItemCount == 0 || getChildCount() == 0) {
  						endFling();
  						return;
  					}
  
  					final Scroller scroller = mScroller;
  					boolean more = scroller.computeScrollOffset();
  					final int y = scroller.getCurrY();
  
  					// Flip sign to convert finger direction to list items direction
  					// (e.g. finger moving down means list is moving towards the top)
  					int delta = mLastFlingY - y;
  
  					// Pretend that each frame of a fling scroll is a touch scroll
  					if (delta > 0) {
  						// List is moving towards the top. Use first view as mMotionPosition
  						mMotionPosition = mFirstPosition;
  						final View firstView = getChildAt(0);
  						mMotionViewOriginalTop = firstView.getTop();
  
  						// Don't fling more than 1 screen
  						delta = Math.min(getHeight() - getPaddingBottom() - getPaddingTop() - 1, delta);
  					} else {
  						// List is moving towards the bottom. Use last view as mMotionPosition
  						int offsetToLast = getChildCount() - 1;
  						mMotionPosition = mFirstPosition + offsetToLast;
  
  						final View lastView = getChildAt(offsetToLast);
  						mMotionViewOriginalTop = lastView.getTop();
  
  						// Don't fling more than 1 screen
  						delta = Math.max(-(getHeight() - getPaddingBottom() - getPaddingTop() - 1), delta);
  					}
  
  					final boolean atEnd = trackMotionScroll(delta, delta);
  
  					if (more && !atEnd) {
  						invalidate();
  						mLastFlingY = y;
  						post(this);
  					} else {
  						endFling();
  
  						if (PROFILE_FLINGING && mFlingProfilingStarted) {
  							Debug.stopMethodTracing();
  							mFlingProfilingStarted = false;
  						}
  					}
  				} else {
  					return;
  				}
  
  			}
  			
  			private static final int FLYWHEEL_TIMEOUT = 40; // milliseconds
  			
  			public void flywheelTouch() {
  				if(mCheckFlywheel == null) {
  					mCheckFlywheel = new Runnable() {
  						public void run() {
  							final VelocityTracker vt = mVelocityTracker;
  							if (vt == null) {
  								return;
  							}
  
  							vt.computeCurrentVelocity(1000, mMaximumVelocity);
  							final float yvel = -vt.getYVelocity();
  
  							if (Math.abs(yvel) >= mMinimumVelocity
  									&& isScrollingInDirection(0, yvel)) {
  								// Keep the fling alive a little longer
  								postDelayed(this, FLYWHEEL_TIMEOUT);
  							} else {
  								endFling();
  								mTouchMode = TOUCH_MODE_SCROLL;
  								reportScrollStateChange(OnScrollListener.SCROLL_STATE_TOUCH_SCROLL);
  							}
  						}
  					};
  				}
  				postDelayed(mCheckFlywheel, FLYWHEEL_TIMEOUT);
  			}
  		}
  
  
  		class VerticalPositionScroller extends PositionScroller {
  			@Override
  			public void run() {
  				final int listHeight = getHeight();
  				final int firstPos = mFirstPosition;
  
  				switch (mMode) {
  				case MOVE_DOWN_POS: {
  					final int lastViewIndex = getChildCount() - 1;
  					final int lastPos = firstPos + lastViewIndex;
  
  					if (lastViewIndex < 0) {
  						return;
  					}
  
  					if (lastPos == mLastSeenPos) {
  						// No new views, let things keep going.
  						post(this);
  						return;
  					}
  
  					final View lastView = getChildAt(lastViewIndex);
  					final int lastViewHeight = lastView.getHeight();
  					final int lastViewTop = lastView.getTop();
  					final int lastViewPixelsShowing = listHeight - lastViewTop;
  					final int extraScroll = lastPos < mItemCount - 1 ? mExtraScroll : mListPadding.bottom;
  
  					smoothScrollBy(lastViewHeight - lastViewPixelsShowing + extraScroll,
  							mScrollDuration);
  
  					mLastSeenPos = lastPos;
  					if (lastPos < mTargetPos) {
  						post(this);
  					}
  					break;
  				}
  
  				case MOVE_DOWN_BOUND: {
  					final int nextViewIndex = 1;
  					final int childCount = getChildCount();
  
  					if (firstPos == mBoundPos || childCount <= nextViewIndex
  							|| firstPos + childCount >= mItemCount) {
  						return;
  					}
  					final int nextPos = firstPos + nextViewIndex;
  
  					if (nextPos == mLastSeenPos) {
  						// No new views, let things keep going.
  						post(this);
  						return;
  					}
  
  					final View nextView = getChildAt(nextViewIndex);
  					final int nextViewHeight = nextView.getHeight();
  					final int nextViewTop = nextView.getTop();
  					final int extraScroll = mExtraScroll;
  					if (nextPos < mBoundPos) {
  						smoothScrollBy(Math.max(0, nextViewHeight + nextViewTop - extraScroll),
  								mScrollDuration);
  
  						mLastSeenPos = nextPos;
  
  						post(this);
  					} else  {
  						if (nextViewTop > extraScroll) {
  							smoothScrollBy(nextViewTop - extraScroll, mScrollDuration);
  						}
  					}
  					break;
  				}
  
  				case MOVE_UP_POS: {
  					if (firstPos == mLastSeenPos) {
  						// No new views, let things keep going.
  						post(this);
  						return;
  					}
  
  					final View firstView = getChildAt(0);
  					if (firstView == null) {
  						return;
  					}
  					final int firstViewTop = firstView.getTop();
  					final int extraScroll = firstPos > 0 ? mExtraScroll : mListPadding.top;
  
  					smoothScrollBy(firstViewTop - extraScroll, mScrollDuration);
  
  					mLastSeenPos = firstPos;
  
  					if (firstPos > mTargetPos) {
  						post(this);
  					}
  					break;
  				}
  
  				case MOVE_UP_BOUND: {
  					final int lastViewIndex = getChildCount() - 2;
  					if (lastViewIndex < 0) {
  						return;
  					}
  					final int lastPos = firstPos + lastViewIndex;
  
  					if (lastPos == mLastSeenPos) {
  						// No new views, let things keep going.
  						post(this);
  						return;
  					}
  
  					final View lastView = getChildAt(lastViewIndex);
  					final int lastViewHeight = lastView.getHeight();
  					final int lastViewTop = lastView.getTop();
  					final int lastViewPixelsShowing = listHeight - lastViewTop;
  					mLastSeenPos = lastPos;
  					if (lastPos > mBoundPos) {
  						smoothScrollBy(-(lastViewPixelsShowing - mExtraScroll), mScrollDuration);
  						post(this);
  					} else {
  						final int bottom = listHeight - mExtraScroll;
  						final int lastViewBottom = lastViewTop + lastViewHeight;
  						if (bottom > lastViewBottom) {
  							smoothScrollBy(-(bottom - lastViewBottom), mScrollDuration);
  						}
  					}
  					break;
  				}
  
  				default:
  					break;
  				}
  			}
  		}
  	}
  
  
  
  
  
  
  	///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
  	//  Horizontal Touch Handler
  	///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
  
  	class HorizontalTouchHandler extends TouchHandler {
  		/**
  		 * The offset to the top of the mMotionPosition view when the down motion event was received
  		 */
  		int mMotionViewOriginalLeft;
  
  		/**
  		 * X value from on the previous motion event (if any)
  		 */
  		int mLastX;
  
  		/**
  		 * The desired offset to the top of the mMotionPosition view after a scroll
  		 */
  		int mMotionViewNewLeft;
  
  
  
  		@Override
  		protected FlingRunnable getFlingRunnable() {
  			return new HorizontalFlingRunnable();
  		}
  
  
  		@Override
  		protected PositionScroller getPositionScroller() {
  			return new HorizontalPositionScroller();
  		}
  
  
  		@Override
  		public boolean onInterceptTouchEvent(MotionEvent ev) {
  			int action = ev.getAction();
  			View v;
  
  			/*
              if (mFastScroller != null) {
                  boolean intercepted = mFastScroller.onInterceptTouchEvent(ev);
                  if (intercepted) {
                      return true;
                  }
              }*/
  
  			switch (action) {
  				case MotionEvent.ACTION_DOWN: {
  					int touchMode = mTouchMode;
  	
  					final int x = (int) ev.getX();
  					final int y = (int) ev.getY();
  					
  					int motionPosition = findMotionRowX(x);
  					if (touchMode != TOUCH_MODE_FLING && motionPosition >= 0) {
  						// User clicked on an actual view (and was not stopping a fling).
  						// Remember where the motion event started
  						v = getChildAt(motionPosition - mFirstPosition);
  						mMotionViewOriginalLeft = v.getLeft();
  						mMotionX = x;
  						mMotionY = y;
  						mMotionPosition = motionPosition;
  						mTouchMode = TOUCH_MODE_DOWN;
  						clearScrollingCache();
  					}
  					mLastX = Integer.MIN_VALUE;
  					initOrResetVelocityTracker();
  					mVelocityTracker.addMovement(ev);
  					if (touchMode == TOUCH_MODE_FLING) {
  						return true;
  					}
  					break;
  				}
  	
  				case MotionEvent.ACTION_MOVE: {
  					if (mTouchMode == TOUCH_MODE_DOWN) {
  						final int x = (int) ev.getX();
  						if (startScrollIfNeeded(x - mMotionX)) {
  							return true;
  						}
  					}
  					break;
  				}
  	
  				case MotionEvent.ACTION_UP: {
  					mTouchMode = TOUCH_MODE_REST;
  					mActivePointerId = INVALID_POINTER;
  					reportScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE);
  					break;
  				}
  
  			}
  
  			return false;
  		}
  
  
  		@Override
  		public boolean onTouchEvent(MotionEvent ev) {
  			if (!isEnabled()) {
  				// A disabled view that is clickable still consumes the touch
  				// events, it just doesn't respond to them.
  				return isClickable() || isLongClickable();
  			}
  
  			/*
              if (mFastScroller != null) {
                  boolean intercepted = mFastScroller.onTouchEvent(ev);
                  if (intercepted) {
                      return true;
                  }
              }*/
  
  			final int action = ev.getAction();
  
  			View v;
  			int deltaX;
  
  			if (mVelocityTracker == null) {
  				mVelocityTracker = VelocityTracker.obtain();
  			}
  			mVelocityTracker.addMovement(ev);
  
  			switch (action) {
  				case MotionEvent.ACTION_DOWN: {
  					final int x = (int) ev.getX();
  					final int y = (int) ev.getY();
  					int motionPosition = pointToPosition(x, y);
  					if (!mDataChanged) {
  						if ((mTouchMode != TOUCH_MODE_FLING) && (motionPosition >= 0)
  								&& (getAdapter().isEnabled(motionPosition))) {
  							// User clicked on an actual view (and was not stopping a fling). It might be a
  							// click or a scroll. Assume it is a click until proven otherwise
  							mTouchMode = TOUCH_MODE_DOWN;
  							// FIXME Debounce
  							if (mPendingCheckForTap == null) {
  								mPendingCheckForTap = new CheckForTap();
  							}
  							postDelayed(mPendingCheckForTap, ViewConfiguration.getTapTimeout());
  						} else {
  							if (ev.getEdgeFlags() != 0 && motionPosition < 0) {
  								// If we couldn't find a view to click on, but the down event was touching
  								// the edge, we will bail out and try again. This allows the edge correcting
  								// code in ViewRoot to try to find a nearby view to select
  								return false;
  							}
  	
  							if (mTouchMode == TOUCH_MODE_FLING) {
  								// Stopped a fling. It is a scroll.
  								createScrollingCache();
  								mTouchMode = TOUCH_MODE_SCROLL;
  								mMotionCorrection = 0;
  								motionPosition = findMotionRowX(x);
  								mFlingRunnable.flywheelTouch();
  							}
  						}
  					}
  	
  					if (motionPosition >= 0) {
  						// Remember where the motion event started
  						v = getChildAt(motionPosition - mFirstPosition);
  						mMotionViewOriginalLeft = v.getLeft();
  					}
  					mMotionX = x;
  					mMotionY = y;
  					mMotionPosition = motionPosition;
  					mLastX = Integer.MIN_VALUE;
  					break;
  				}
  	
  				case MotionEvent.ACTION_MOVE: {
  					final int x = (int) ev.getX();
  					deltaX = x - mMotionX;
  					switch (mTouchMode) {
  					case TOUCH_MODE_DOWN:
  					case TOUCH_MODE_TAP:
  					case TOUCH_MODE_DONE_WAITING:
  						// Check if we have moved far enough that it looks more like a
  						// scroll than a tap
  						startScrollIfNeeded(deltaX);
  						break;
  					case TOUCH_MODE_SCROLL:
  						if (PROFILE_SCROLLING && !mScrollProfilingStarted) {
  							Debug.startMethodTracing("JessAbsListViewScroll");
  							mScrollProfilingStarted = true;
  						}
  	
  						if (x != mLastX) {
  							deltaX -= mMotionCorrection;
  							int incrementalDeltaX = mLastX != Integer.MIN_VALUE ? x - mLastX : deltaX;
  	
  							// No need to do all this work if we're not going to move anyway
  							boolean atEdge = false;
  							if (incrementalDeltaX != 0) {
  								atEdge = trackMotionScroll(deltaX, incrementalDeltaX);
  							}
  	
  							// Check to see if we have bumped into the scroll limit
  							if (atEdge && getChildCount() > 0) {
  								// Treat this like we're starting a new scroll from the current
  								// position. This will let the user start scrolling back into
  								// content immediately rather than needing to scroll back to the
  								// point where they hit the limit first.
  								int motionPosition = findMotionRowX(x);
  								if (motionPosition >= 0) {
  									final View motionView = getChildAt(motionPosition - mFirstPosition);
  									mMotionViewOriginalLeft = motionView.getLeft();
  								}
  								mMotionX = x;
  								mMotionPosition = motionPosition;
  								invalidate();
  							}
  							mLastX = x;
  						}
  						break;
  					}
  	
  					break;
  				}
  	
  				case MotionEvent.ACTION_UP: {
  					switch (mTouchMode) {
  					case TOUCH_MODE_DOWN:
  					case TOUCH_MODE_TAP:
  					case TOUCH_MODE_DONE_WAITING:
  						final int motionPosition = mMotionPosition;
  						final View child = getChildAt(motionPosition - mFirstPosition);
  						if (child != null && !child.hasFocusable()) {
  							if (mTouchMode != TOUCH_MODE_DOWN) {
  								child.setPressed(false);
  							}
  	
  							if (mPerformClick == null) {
  								mPerformClick = new PerformClick();
  							}
  	
  							final TwoWayAbsListView.PerformClick performClick = mPerformClick;
  							performClick.mChild = child;
  							performClick.mClickMotionPosition = motionPosition;
  							performClick.rememberWindowAttachCount();
  	
  							mResurrectToPosition = motionPosition;
  	
  							if (mTouchMode == TOUCH_MODE_DOWN || mTouchMode == TOUCH_MODE_TAP) {
  								final Handler handler = getHandler();
  								if (handler != null) {
  									handler.removeCallbacks(mTouchMode == TOUCH_MODE_DOWN ?
  											mPendingCheckForTap : mPendingCheckForLongPress);
  								}
  								mLayoutMode = LAYOUT_NORMAL;
  								if (!mDataChanged && mAdapter.isEnabled(motionPosition)) {
  									mTouchMode = TOUCH_MODE_TAP;
  									setSelectedPositionInt(mMotionPosition);
  									layoutChildren();
  									child.setPressed(true);
  									positionSelector(child);
  									setPressed(true);
  									if (mSelector != null) {
  										Drawable d = mSelector.getCurrent();
  										if (d != null && d instanceof TransitionDrawable) {
  											((TransitionDrawable) d).resetTransition();
  										}
  									}
  									postDelayed(new Runnable() {
  										public void run() {
  											child.setPressed(false);
  											setPressed(false);
  											if (!mDataChanged) {
  												post(performClick);
  											}
  											mTouchMode = TOUCH_MODE_REST;
  										}
  									}, ViewConfiguration.getPressedStateDuration());
  								} else {
  									mTouchMode = TOUCH_MODE_REST;
  								}
  								return true;
  							} else if (!mDataChanged && mAdapter.isEnabled(motionPosition)) {
  								post(performClick);
  							}
  						}
  						mTouchMode = TOUCH_MODE_REST;
  						break;
  					case TOUCH_MODE_SCROLL:
  						final int childCount = getChildCount();
  						if (childCount > 0) {
  							if (mFirstPosition == 0 && getChildAt(0).getLeft() >= mListPadding.left &&
  									mFirstPosition + childCount < mItemCount &&
  									getChildAt(childCount - 1).getRight() <=
  										getWidth() - mListPadding.right) {
  								mTouchMode = TOUCH_MODE_REST;
  								reportScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE);
  							} else {
  								final VelocityTracker velocityTracker = mVelocityTracker;
  								velocityTracker.computeCurrentVelocity(1000);
  								final int initialVelocity = (int) velocityTracker.getXVelocity();
  	
  								if (Math.abs(initialVelocity) > mMinimumVelocity) {
  									if (mFlingRunnable == null) {
  										mFlingRunnable = new HorizontalFlingRunnable();
  									}
  									reportScrollStateChange(OnScrollListener.SCROLL_STATE_FLING);
  	
  									mFlingRunnable.start(-initialVelocity);
  								} else {
  									mTouchMode = TOUCH_MODE_REST;
  									reportScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE);
  								}
  							}
  						} else {
  							mTouchMode = TOUCH_MODE_REST;
  							reportScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE);
  						}
  						break;
  					}
  	
  					setPressed(false);
  	
  					// Need to redraw since we probably aren't drawing the selector anymore
  					invalidate();
  	
  					final Handler handler = getHandler();
  					if (handler != null) {
  						handler.removeCallbacks(mPendingCheckForLongPress);
  					}
  	
  					if (mVelocityTracker != null) {
  						mVelocityTracker.recycle();
  						mVelocityTracker = null;
  					}
  	
  					mActivePointerId = INVALID_POINTER;
  	
  					if (PROFILE_SCROLLING && mScrollProfilingStarted) {
  						Debug.stopMethodTracing();
  						mScrollProfilingStarted = false;
  					}
  					break;
  				}
  	
  				case MotionEvent.ACTION_CANCEL: {
  					mTouchMode = TOUCH_MODE_REST;
  					setPressed(false);
  					View motionView = TwoWayAbsListView.this.getChildAt(mMotionPosition - mFirstPosition);
  					if (motionView != null) {
  						motionView.setPressed(false);
  					}
  					clearScrollingCache();
  	
  					final Handler handler = getHandler();
  					if (handler != null) {
  						handler.removeCallbacks(mPendingCheckForLongPress);
  					}
  	
  					if (mVelocityTracker != null) {
  						mVelocityTracker.recycle();
  						mVelocityTracker = null;
  					}
  	
  					mActivePointerId = INVALID_POINTER;
  					break;
  				}
  			}
  
  			return true;
  		}
  
  
  		@Override
  		boolean resurrectSelection() {
  			final int childCount = getChildCount();
  
  			if (childCount <= 0) {
  				return false;
  			}
  
  			int selectedLeft = 0;
  			int selectedPos;
  			int childrenLeft = mListPadding.top;
  			int childrenRight = getRight() - getLeft() - mListPadding.right;
  			final int firstPosition = mFirstPosition;
  			final int toPosition = mResurrectToPosition;
  			boolean down = true;
  
  			if (toPosition >= firstPosition && toPosition < firstPosition + childCount) {
  				selectedPos = toPosition;
  
  				final View selected = getChildAt(selectedPos - mFirstPosition);
  				selectedLeft = selected.getLeft();
  				int selectedRight = selected.getRight();
  
  				// We are scrolled, don't get in the fade
  				if (selectedLeft < childrenLeft) {
  					selectedLeft = childrenLeft + getHorizontalFadingEdgeLength();
  				} else if (selectedRight > childrenRight) {
  					selectedLeft = childrenRight - selected.getMeasuredWidth()
  					- getHorizontalFadingEdgeLength();
  				}
  			} else {
  				if (toPosition < firstPosition) {
  					// Default to selecting whatever is first
  					selectedPos = firstPosition;
  					for (int i = 0; i < childCount; i++) {
  						final View v = getChildAt(i);
  						final int left = v.getLeft();
  
  						if (i == 0) {
  							// Remember the position of the first item
  							selectedLeft = left;
  							// See if we are scrolled at all
  							if (firstPosition > 0 || left < childrenLeft) {
  								// If we are scrolled, don't select anything that is
  								// in the fade region
  								childrenLeft += getHorizontalFadingEdgeLength();
  							}
  						}
  						if (left >= childrenLeft) {
  							// Found a view whose top is fully visisble
  							selectedPos = firstPosition + i;
  							selectedLeft = left;
  							break;
  						}
  					}
  				} else {
  					final int itemCount = mItemCount;
  					down = false;
  					selectedPos = firstPosition + childCount - 1;
  
  					for (int i = childCount - 1; i >= 0; i--) {
  						final View v = getChildAt(i);
  						final int left = v.getLeft();
  						final int right = v.getRight();
  
  						if (i == childCount - 1) {
  							selectedLeft = left;
  							if (firstPosition + childCount < itemCount || right > childrenRight) {
  								childrenRight -= getHorizontalFadingEdgeLength();
  							}
  						}
  
  						if (right <= childrenRight) {
  							selectedPos = firstPosition + i;
  							selectedLeft = left;
  							break;
  						}
  					}
  				}
  			}
  
  			mResurrectToPosition = INVALID_POSITION;
  			removeCallbacks(mFlingRunnable);
  			mTouchMode = TOUCH_MODE_REST;
  			clearScrollingCache();
  			mSpecificTop = selectedLeft;
  			selectedPos = lookForSelectablePosition(selectedPos, down);
  			if (selectedPos >= firstPosition && selectedPos <= getLastVisiblePosition()) {
  				mLayoutMode = LAYOUT_SPECIFIC;
  				setSelectionInt(selectedPos);
  				invokeOnItemScrollListener();
  			} else {
  				selectedPos = INVALID_POSITION;
  			}
  			reportScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE);
  
  			return selectedPos >= 0;
  		}
  
  
  		@Override
  		boolean trackMotionScroll(int delta, int incrementalDelta) {
  			if (DEBUG) Log.i(TAG, "trackMotionScroll() - deltaX: " + delta + " incrDeltaX: " + incrementalDelta);
  			final int childCount = getChildCount();
  			if (childCount == 0) {
  				return true;
  			}
  
  			final int firstLeft = getChildAt(0).getLeft();
  			final int lastRight = getChildAt(childCount - 1).getRight();
  
  			final Rect listPadding = mListPadding;
  
  			// FIXME account for grid horizontal spacing too?
  			final int spaceAbove = listPadding.left - firstLeft;
  			final int end = getWidth() - listPadding.right;
  			final int spaceBelow = lastRight - end;
  
  			final int width = getWidth() - getPaddingRight() - getPaddingLeft();
  			if (delta < 0) {
  				delta = Math.max(-(width - 1), delta);
  			} else {
  				delta = Math.min(width - 1, delta);
  			}
  
  			if (incrementalDelta < 0) {
  				incrementalDelta = Math.max(-(width - 1), incrementalDelta);
  			} else {
  				incrementalDelta = Math.min(width - 1, incrementalDelta);
  			}
  
  			final int firstPosition = mFirstPosition;
  
  			if (firstPosition == 0 && firstLeft >= listPadding.left && delta >= 0) {
  				// Don't need to move views right if the top of the first position
  				// is already visible
  				if (DEBUG) Log.i(TAG, "trackScrollMotion returning true");
  				return true;
  			}
  
  			if (firstPosition + childCount == mItemCount && lastRight <= end && delta <= 0) {
  				// Don't need to move views left if the bottom of the last position
  				// is already visible
  				if (DEBUG) Log.i(TAG, "trackScrollMotion returning true");
  				return true;
  			}
  
  			final boolean down = incrementalDelta < 0;
  
  			final boolean inTouchMode = isInTouchMode();
  			if (inTouchMode) {
  				hideSelector();
  			}
  
  			final int headerViewsCount = getHeaderViewsCount();
  			final int footerViewsStart = mItemCount - getFooterViewsCount();
  
  			int start = 0;
  			int count = 0;
  
  			if (down) {
  				final int left = listPadding.left - incrementalDelta;
  				for (int i = 0; i < childCount; i++) {
  					final View child = getChildAt(i);
  					if (child.getRight() >= left) {
  						break;
  					} else {
  						count++;
  						int position = firstPosition + i;
  						if (position >= headerViewsCount && position < footerViewsStart) {
  							mRecycler.addScrapView(child);
  
  							if (ViewDebug.TRACE_RECYCLER) {
  								ViewDebug.trace(child,
  										ViewDebug.RecyclerTraceType.MOVE_TO_SCRAP_HEAP,
  										firstPosition + i, -1);
  							}
  						}
  					}
  				}
  			} else {
  				final int right = getWidth() - listPadding.right - incrementalDelta;
  				for (int i = childCount - 1; i >= 0; i--) {
  					final View child = getChildAt(i);
  					if (child.getLeft() <= right) {
  						break;
  					} else {
  						start = i;
  						count++;
  						int position = firstPosition + i;
  						if (position >= headerViewsCount && position < footerViewsStart) {
  							mRecycler.addScrapView(child);
  
  							if (ViewDebug.TRACE_RECYCLER) {
  								ViewDebug.trace(child,
  										ViewDebug.RecyclerTraceType.MOVE_TO_SCRAP_HEAP,
  										firstPosition + i, -1);
  							}
  						}
  					}
  				}
  			}
  
  			mMotionViewNewLeft = mMotionViewOriginalLeft + delta;
  
  			mBlockLayoutRequests = true;
  
  			if (count > 0) {
  				detachViewsFromParent(start, count);
  			}
  			offsetChildrenLeftAndRight(incrementalDelta);
  
  			if (down) {
  				mFirstPosition += count;
  			}
  
  			invalidate();
  
  			final int absIncrementalDelta = Math.abs(incrementalDelta);
  			if (spaceAbove < absIncrementalDelta|| spaceBelow < absIncrementalDelta) {
  				fillGap(down);
  			}
  
  			if (!inTouchMode && mSelectedPosition != INVALID_POSITION) {
  				final int childIndex = mSelectedPosition - mFirstPosition;
  				if (childIndex >= 0 && childIndex < getChildCount()) {
  					positionSelector(getChildAt(childIndex));
  				}
  			}
  
  			mBlockLayoutRequests = false;
  
  			invokeOnItemScrollListener();
  			//awakenScrollBars();
  			if (DEBUG) Log.i(TAG, "trackScrollMotion returning false - mFirstPosition: " + mFirstPosition);
  			return false;
  		}
  
  
  		/**
  		 * Responsible for fling behavior. Use {@link #start(int)} to
  		 * initiate a fling. Each frame of the fling is handled in {@link #run()}.
  		 * A FlingRunnable will keep re-posting itself until the fling is done.
  		 *
  		 */
  		private class HorizontalFlingRunnable extends FlingRunnable {
  			/**
  			 * X value reported by mScroller on the previous fling
  			 */
  			protected int mLastFlingX;
  			
  			@Override
  			void start(int initialVelocity) {
  				int initialX = initialVelocity < 0 ? Integer.MAX_VALUE : 0;
  				mLastFlingX = initialX;
  				mScroller.fling(initialX, 0, initialVelocity, 0,
  						0, Integer.MAX_VALUE, 0, Integer.MAX_VALUE);
  				mTouchMode = TOUCH_MODE_FLING;
  				post(this);
  
  				if (PROFILE_FLINGING && !mFlingProfilingStarted) {
  					Debug.startMethodTracing("AbsListViewFling");
  					mFlingProfilingStarted = true;
  				}
  			}
  
  			@Override
  			void startScroll(int distance, int duration) {
  				int initialX = distance < 0 ? Integer.MAX_VALUE : 0;
  				mLastFlingX = initialX;
  				mScroller.startScroll(initialX, 0, distance, 0, duration);
  				mTouchMode = TOUCH_MODE_FLING;
  				post(this);
  			}
  
  			@Override
  			public void run() {
  				if (mTouchMode == TOUCH_MODE_FLING) {
  					if (mItemCount == 0 || getChildCount() == 0) {
  						endFling();
  						return;
  					}
  
  					final Scroller scroller = mScroller;
  					boolean more = scroller.computeScrollOffset();
  					final int x = scroller.getCurrX();
  
  					// Flip sign to convert finger direction to list items direction
  					// (e.g. finger moving down means list is moving towards the top)
  					int delta = mLastFlingX - x;
  
  					// Pretend that each frame of a fling scroll is a touch scroll
  					if (delta > 0) {
  						// List is moving towards the top. Use first view as mMotionPosition
  						mMotionPosition = mFirstPosition;
  						final View firstView = getChildAt(0);
  						mMotionViewOriginalLeft = firstView.getLeft();
  
  						// Don't fling more than 1 screen
  						delta = Math.min(getWidth() - getPaddingRight() - getPaddingLeft() - 1, delta);
  					} else {
  						// List is moving towards the bottom. Use last view as mMotionPosition
  						int offsetToLast = getChildCount() - 1;
  						mMotionPosition = mFirstPosition + offsetToLast;
  
  						final View lastView = getChildAt(offsetToLast);
  						mMotionViewOriginalLeft = lastView.getLeft();
  
  						// Don't fling more than 1 screen
  						delta = Math.max(-(getWidth() - getPaddingRight() - getPaddingLeft() - 1), delta);
  					}
  
  					final boolean atEnd = trackMotionScroll(delta, delta);
  
  					if (more && !atEnd) {
  						invalidate();
  						mLastFlingX = x;
  						post(this);
  					} else {
  						endFling();
  
  						if (PROFILE_FLINGING && mFlingProfilingStarted) {
  							Debug.stopMethodTracing();
  							mFlingProfilingStarted = false;
  						}
  					}
  				} else {
  					return;
  				}
  
  			}
  			
  			
  			private static final int FLYWHEEL_TIMEOUT = 40; // milliseconds
  	
  			public void flywheelTouch() {
  				if(mCheckFlywheel == null) {
  					mCheckFlywheel = new Runnable() {
  						public void run() {
  							final VelocityTracker vt = mVelocityTracker;
  							if (vt == null) {
  								return;
  							}
  
  							vt.computeCurrentVelocity(1000, mMaximumVelocity);
  							final float xvel = -vt.getXVelocity();
  
  							if (Math.abs(xvel) >= mMinimumVelocity
  									&& isScrollingInDirection(0, xvel)) {
  								// Keep the fling alive a little longer
  								postDelayed(this, FLYWHEEL_TIMEOUT);
  							} else {
  								endFling();
  								mTouchMode = TOUCH_MODE_SCROLL;
  								reportScrollStateChange(OnScrollListener.SCROLL_STATE_TOUCH_SCROLL);
  							}
  						}
  					};
  				}
  				postDelayed(mCheckFlywheel, FLYWHEEL_TIMEOUT);
  			}
  		}
  
  
  		class HorizontalPositionScroller extends PositionScroller {
  			@Override
  			public void run() {
  				final int listWidth = getWidth();
  				final int firstPos = mFirstPosition;
  
  				switch (mMode) {
  				case MOVE_DOWN_POS: {
  					final int lastViewIndex = getChildCount() - 1;
  					final int lastPos = firstPos + lastViewIndex;
  
  					if (lastViewIndex < 0) {
  						return;
  					}
  
  					if (lastPos == mLastSeenPos) {
  						// No new views, let things keep going.
  						post(this);
  						return;
  					}
  
  					final View lastView = getChildAt(lastViewIndex);
  					final int lastViewWidth = lastView.getWidth();
  					final int lastViewLeft = lastView.getLeft();
  					final int lastViewPixelsShowing = listWidth - lastViewLeft;
  					final int extraScroll = lastPos < mItemCount - 1 ? mExtraScroll : mListPadding.right;
  
  					smoothScrollBy(lastViewWidth - lastViewPixelsShowing + extraScroll,
  							mScrollDuration);
  
  					mLastSeenPos = lastPos;
  					if (lastPos < mTargetPos) {
  						post(this);
  					}
  					break;
  				}
  
  				case MOVE_DOWN_BOUND: {
  					final int nextViewIndex = 1;
  					final int childCount = getChildCount();
  
  					if (firstPos == mBoundPos || childCount <= nextViewIndex
  							|| firstPos + childCount >= mItemCount) {
  						return;
  					}
  					final int nextPos = firstPos + nextViewIndex;
  
  					if (nextPos == mLastSeenPos) {
  						// No new views, let things keep going.
  						post(this);
  						return;
  					}
  
  					final View nextView = getChildAt(nextViewIndex);
  					final int nextViewWidth = nextView.getWidth();
  					final int nextViewLeft = nextView.getLeft();
  					final int extraScroll = mExtraScroll;
  					if (nextPos < mBoundPos) {
  						smoothScrollBy(Math.max(0, nextViewWidth + nextViewLeft - extraScroll),
  								mScrollDuration);
  
  						mLastSeenPos = nextPos;
  
  						post(this);
  					} else  {
  						if (nextViewLeft > extraScroll) {
  							smoothScrollBy(nextViewLeft - extraScroll, mScrollDuration);
  						}
  					}
  					break;
  				}
  
  				case MOVE_UP_POS: {
  					if (firstPos == mLastSeenPos) {
  						// No new views, let things keep going.
  						post(this);
  						return;
  					}
  
  					final View firstView = getChildAt(0);
  					if (firstView == null) {
  						return;
  					}
  					final int firstViewLeft = firstView.getLeft();
  					final int extraScroll = firstPos > 0 ? mExtraScroll : mListPadding.left;
  
  					smoothScrollBy(firstViewLeft - extraScroll, mScrollDuration);
  
  					mLastSeenPos = firstPos;
  
  					if (firstPos > mTargetPos) {
  						post(this);
  					}
  					break;
  				}
  
  				case MOVE_UP_BOUND: {
  					final int lastViewIndex = getChildCount() - 2;
  					if (lastViewIndex < 0) {
  						return;
  					}
  					final int lastPos = firstPos + lastViewIndex;
  
  					if (lastPos == mLastSeenPos) {
  						// No new views, let things keep going.
  						post(this);
  						return;
  					}
  
  					final View lastView = getChildAt(lastViewIndex);
  					final int lastViewWidth = lastView.getWidth();
  					final int lastViewLeft = lastView.getLeft();
  					final int lastViewPixelsShowing = listWidth - lastViewLeft;
  					mLastSeenPos = lastPos;
  					if (lastPos > mBoundPos) {
  						smoothScrollBy(-(lastViewPixelsShowing - mExtraScroll), mScrollDuration);
  						post(this);
  					} else {
  						final int right = listWidth - mExtraScroll;
  						final int lastViewRight = lastViewLeft + lastViewWidth;
  						if (right > lastViewRight) {
  							smoothScrollBy(-(right - lastViewRight), mScrollDuration);
  						}
  					}
  					break;
  				}
  
  				default:
  					break;
  				}
  			}
  		}
  
  	}
  
  
  	private void initOrResetVelocityTracker() {
  		if (mVelocityTracker == null) {
  			mVelocityTracker = VelocityTracker.obtain();
  		} else {
  			mVelocityTracker.clear();
  		}
  	}
  
  }
  
  
  
  