content: package com.alium.orin.util;
  
  import android.animation.Animator;
  import android.animation.ArgbEvaluator;
  import android.animation.ObjectAnimator;
  import android.content.Context;
  import android.content.res.ColorStateList;
  import android.content.res.Resources;
  import android.graphics.Color;
  import android.graphics.drawable.ColorDrawable;
  import android.graphics.drawable.Drawable;
  import android.graphics.drawable.RippleDrawable;
  import android.graphics.drawable.StateListDrawable;
  import android.os.Build;
  import android.support.annotation.ColorInt;
  import android.support.v4.view.ViewCompat;
  import android.util.DisplayMetrics;
  import android.view.View;
  import android.view.ViewGroup;
  import android.view.animation.PathInterpolator;
  import android.widget.ListAdapter;
  import android.widget.ListView;
  import android.widget.TextView;
  
  import com.kabouzeid.appthemehelper.util.ATHUtil;
  import com.kabouzeid.appthemehelper.util.ColorUtil;
  import com.kabouzeid.appthemehelper.util.MaterialValueHelper;
  import com.alium.orin.R;
  import com.simplecityapps.recyclerview_fastscroll.views.FastScrollRecyclerView;
  
  /**
   * @author Karim Abou Zeid (kabouzeid)
   */
  public class ViewUtil {
  
      public final static int PHONOGRAPH_ANIM_TIME = 1000;
  
      public static Animator createBackgroundColorTransition(final View v, @ColorInt final int startColor, @ColorInt final int endColor) {
          return createColorAnimator(v, "backgroundColor", startColor, endColor);
      }
  
      public static Animator createTextColorTransition(final TextView v, @ColorInt final int startColor, @ColorInt final int endColor) {
          return createColorAnimator(v, "textColor", startColor, endColor);
      }
  
      private static Animator createColorAnimator(Object target, String propertyName, @ColorInt int startColor, @ColorInt int endColor) {
          ObjectAnimator animator;
          if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
              animator = ObjectAnimator.ofArgb(target, propertyName, startColor, endColor);
          } else {
              animator = ObjectAnimator.ofInt(target, propertyName, startColor, endColor);
              animator.setEvaluator(new ArgbEvaluator());
          }
  
          if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
              animator.setInterpolator(new PathInterpolator(0.4f, 0f, 1f, 1f));
          }
          animator.setDuration(PHONOGRAPH_ANIM_TIME);
          return animator;
      }
  
      public static boolean setListViewHeightBasedOnItems(ListView listView) {
  
          ListAdapter listAdapter = listView.getAdapter();
          if (listAdapter != null) {
  
              int numberOfItems = listAdapter.getCount();
  
              // Get total height of all items.
              int totalItemsHeight = 0;
              for (int itemPos = 0; itemPos < numberOfItems; itemPos++) {
                  View item = listAdapter.getView(itemPos, null, listView);
                  item.measure(0, 0);
                  totalItemsHeight += item.getMeasuredHeight();
              }
  
              // Get total height of all item dividers.
              int totalDividersHeight = listView.getDividerHeight() *
                      (numberOfItems - 1);
  
              int topPAdding = listView.getPaddingTop();
              int bottomPadding = listView.getPaddingBottom();
  
              // Set list height.
              ViewGroup.LayoutParams params = listView.getLayoutParams();
              params.height = totalItemsHeight + totalDividersHeight + topPAdding + bottomPadding;
              listView.setLayoutParams(params);
              listView.requestLayout();
  
              return true;
  
          } else {
              return false;
          }
  
      }
  
  
      public static void setMargins (View v, int l, int t, int r, int b) {
          if (v.getLayoutParams() instanceof ViewGroup.MarginLayoutParams) {
              ViewGroup.MarginLayoutParams p = (ViewGroup.MarginLayoutParams) v.getLayoutParams();
              p.setMargins(l, t, r, b);
              v.requestLayout();
          }
      }
  
      public static Drawable createSelectorDrawable(Context context, @ColorInt int color) {
          final StateListDrawable baseSelector = new StateListDrawable();
          baseSelector.addState(new int[]{android.R.attr.state_activated}, new ColorDrawable(color));
  
          if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
              return new RippleDrawable(ColorStateList.valueOf(color), baseSelector, new ColorDrawable(Color.WHITE));
          }
  
          baseSelector.addState(new int[]{}, new ColorDrawable(Color.TRANSPARENT));
          baseSelector.addState(new int[]{android.R.attr.state_pressed}, new ColorDrawable(color));
          return baseSelector;
      }
  
      public static boolean hitTest(View v, int x, int y) {
          final int tx = (int) (ViewCompat.getTranslationX(v) + 0.5f);
          final int ty = (int) (ViewCompat.getTranslationY(v) + 0.5f);
          final int left = v.getLeft() + tx;
          final int right = v.getRight() + tx;
          final int top = v.getTop() + ty;
          final int bottom = v.getBottom() + ty;
  
          return (x >= left) && (x <= right) && (y >= top) && (y <= bottom);
      }
  
      public static void setUpFastScrollRecyclerViewColor(Context context, FastScrollRecyclerView recyclerView, int accentColor) {
          recyclerView.setPopupBgColor(accentColor);
          recyclerView.setPopupTextColor(MaterialValueHelper.getPrimaryTextColor(context, ColorUtil.isColorLight(accentColor)));
          recyclerView.setThumbColor(accentColor);
          recyclerView.setTrackColor(ColorUtil.withAlpha(ATHUtil.resolveColor(context, R.attr.colorControlNormal), 0.12f));
      }
  
      public static float convertDpToPixel(float dp, Resources resources) {
          DisplayMetrics metrics = resources.getDisplayMetrics();
          return dp * metrics.density;
      }
  
      public static float convertPixelsToDp(float px, Resources resources) {
          DisplayMetrics metrics = resources.getDisplayMetrics();
          return px / metrics.density;
      }
  }