content: package com.faceunity.fulivedemo.ui;
  
  import android.content.Context;
  import android.content.res.TypedArray;
  import android.support.annotation.IdRes;
  import android.util.AttributeSet;
  import android.view.View;
  import android.view.ViewGroup;
  import android.widget.LinearLayout;
  
  /**
   * Created by tujh on 2018/4/17.
   */
  public class BeautyBoxGroup extends LinearLayout {
      // holds the checked id; the selection is empty by default
      private int mCheckedId = -1;
      // tracks children radio buttons checked state
      private BeautyBox.OnCheckedChangeListener mChildOnCheckedChangeListener;
      // when true, mOnCheckedChangeListener discards events
      private boolean mProtectFromCheckedChange = false;
      private OnCheckedChangeListener mOnCheckedChangeListener;
      private PassThroughHierarchyChangeListener mPassThroughListener;
  
      /**
       * {@inheritDoc}
       */
      public BeautyBoxGroup(Context context) {
          super(context);
          setOrientation(VERTICAL);
          init();
      }
  
      /**
       * {@inheritDoc}
       */
      public BeautyBoxGroup(Context context, AttributeSet attrs) {
          super(context, attrs);
          init();
      }
  
      private void init() {
          mChildOnCheckedChangeListener = new CheckedStateTracker();
          mPassThroughListener = new PassThroughHierarchyChangeListener();
          super.setOnHierarchyChangeListener(mPassThroughListener);
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public void setOnHierarchyChangeListener(OnHierarchyChangeListener listener) {
          // the user listener is delegated to our pass-through listener
          mPassThroughListener.mOnHierarchyChangeListener = listener;
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      protected void onFinishInflate() {
          super.onFinishInflate();
  
          // checks the appropriate radio button as requested in the XML file
          if (mCheckedId != -1) {
              mProtectFromCheckedChange = true;
              setCheckedStateForView(mCheckedId, true);
              mProtectFromCheckedChange = false;
              setCheckedId(mCheckedId);
          }
      }
  
      @Override
      public void addView(View child, int index, ViewGroup.LayoutParams params) {
          if (child instanceof BeautyBox) {
              final BeautyBox button = (BeautyBox) child;
              if (button.isChecked()) {
                  mProtectFromCheckedChange = true;
                  if (mCheckedId != -1) {
                      setCheckedStateForView(mCheckedId, false);
                  }
                  mProtectFromCheckedChange = false;
                  setCheckedId(button.getId());
              }
          }
  
          super.addView(child, index, params);
      }
  
      /**
       * <p>Sets the selection to the radio button whose identifier is passed in
       * parameter. Using -1 as the selection identifier clears the selection;
       * such an operation is equivalent to invoking {@link #clearCheck()}.</p>
       *
       * @param id the unique id of the radio button to select in this group
       *
       * @see #getCheckedBeautyBoxId()
       * @see #clearCheck()
       */
      public void check(@IdRes int id) {
          // don't even bother
          if (id != -1 && (id == mCheckedId)) {
              return;
          }
  
          if (mCheckedId != -1) {
              setCheckedStateForView(mCheckedId, false);
          }
  
          if (id != -1) {
              setCheckedStateForView(id, true);
          }
  
          setCheckedId(id);
      }
  
      private void setCheckedId(@IdRes int id) {
          mCheckedId = id;
          if (mOnCheckedChangeListener != null) {
              mOnCheckedChangeListener.onCheckedChanged(this, mCheckedId);
          }
      }
  
      private void setCheckedStateForView(int viewId, boolean checked) {
          View checkedView = findViewById(viewId);
          if (checkedView != null && checkedView instanceof BeautyBox) {
              ((BeautyBox) checkedView).setChecked(checked);
          }
      }
  
      /**
       * <p>Returns the identifier of the selected radio button in this group.
       * Upon empty selection, the returned value is -1.</p>
       *
       * @return the unique id of the selected radio button in this group
       *
       * @see #check(int)
       * @see #clearCheck()
       *
       * @attr ref android.R.styleable#BeautyBoxGroup_checkedButton
       */
      @IdRes
      public int getCheckedBeautyBoxId() {
          return mCheckedId;
      }
  
      /**
       * <p>Clears the selection. When the selection is cleared, no radio button
       * in this group is selected and {@link #getCheckedBeautyBoxId()} returns
       * null.</p>
       *
       * @see #check(int)
       * @see #getCheckedBeautyBoxId()
       */
      public void clearCheck() {
          check(-1);
      }
  
      /**
       * <p>Register a callback to be invoked when the checked radio button
       * changes in this group.</p>
       *
       * @param listener the callback to call on checked state change
       */
      public void setOnCheckedChangeListener(OnCheckedChangeListener listener) {
          mOnCheckedChangeListener = listener;
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public LayoutParams generateLayoutParams(AttributeSet attrs) {
          return new LayoutParams(getContext(), attrs);
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      protected boolean checkLayoutParams(ViewGroup.LayoutParams p) {
          return p instanceof LayoutParams;
      }
  
      @Override
      protected LinearLayout.LayoutParams generateDefaultLayoutParams() {
          return new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
      }
  
      @Override
      public CharSequence getAccessibilityClassName() {
          return BeautyBoxGroup.class.getName();
      }
  
      public static class LayoutParams extends LinearLayout.LayoutParams {
          /**
           * {@inheritDoc}
           */
          public LayoutParams(Context c, AttributeSet attrs) {
              super(c, attrs);
          }
  
          /**
           * {@inheritDoc}
           */
          public LayoutParams(int w, int h) {
              super(w, h);
          }
  
          /**
           * {@inheritDoc}
           */
          public LayoutParams(int w, int h, float initWeight) {
              super(w, h, initWeight);
          }
  
          /**
           * {@inheritDoc}
           */
          public LayoutParams(ViewGroup.LayoutParams p) {
              super(p);
          }
  
          /**
           * {@inheritDoc}
           */
          public LayoutParams(MarginLayoutParams source) {
              super(source);
          }
  
          /**
           * <p>Fixes the child's width to
           * {@link ViewGroup.LayoutParams#WRAP_CONTENT} and the child's
           * height to  {@link ViewGroup.LayoutParams#WRAP_CONTENT}
           * when not specified in the XML file.</p>
           *
           * @param a the styled attributes set
           * @param widthAttr the width attribute to fetch
           * @param heightAttr the height attribute to fetch
           */
          @Override
          protected void setBaseAttributes(TypedArray a,
                                           int widthAttr, int heightAttr) {
  
              if (a.hasValue(widthAttr)) {
                  width = a.getLayoutDimension(widthAttr, "layout_width");
              } else {
                  width = WRAP_CONTENT;
              }
  
              if (a.hasValue(heightAttr)) {
                  height = a.getLayoutDimension(heightAttr, "layout_height");
              } else {
                  height = WRAP_CONTENT;
              }
          }
      }
  
      /**
       * <p>Interface definition for a callback to be invoked when the checked
       * radio button changed in this group.</p>
       */
      public interface OnCheckedChangeListener {
          /**
           * <p>Called when the checked radio button has changed. When the
           * selection is cleared, checkedId is -1.</p>
           *
           * @param group the group in which the checked radio button has changed
           * @param checkedId the unique identifier of the newly checked radio button
           */
          public void onCheckedChanged(BeautyBoxGroup group, @IdRes int checkedId);
      }
  
      private class CheckedStateTracker implements BeautyBox.OnCheckedChangeListener {
  
          @Override
          public void onCheckedChanged(BeautyBox beautyBox, boolean isChecked) {
              // prevents from infinite recursion
              if (mProtectFromCheckedChange) {
                  return;
              }
  
              mProtectFromCheckedChange = true;
              if (mCheckedId != -1) {
                  setCheckedStateForView(mCheckedId, false);
              }
              mProtectFromCheckedChange = false;
  
              int id = beautyBox.getId();
              setCheckedId(id);
          }
      }
  
      /**
       * <p>A pass-through listener acts upon the events and dispatches them
       * to another listener. This allows the table layout to set its own internal
       * hierarchy change listener without preventing the user to setup his.</p>
       */
      private class PassThroughHierarchyChangeListener implements
              OnHierarchyChangeListener {
          private OnHierarchyChangeListener mOnHierarchyChangeListener;
  
          /**
           * {@inheritDoc}
           */
          public void onChildViewAdded(View parent, View child) {
              if (parent == BeautyBoxGroup.this && child instanceof BeautyBox) {
                  int id = child.getId();
                  // generates an id if it's missing
                  if (id == View.NO_ID) {
                      id = View.generateViewId();
                      child.setId(id);
                  }
                  ((BeautyBox) child).setOnCheckedChangeListener(
                          mChildOnCheckedChangeListener);
              }
  
              if (mOnHierarchyChangeListener != null) {
                  mOnHierarchyChangeListener.onChildViewAdded(parent, child);
              }
          }
  
          /**
           * {@inheritDoc}
           */
          public void onChildViewRemoved(View parent, View child) {
              if (parent == BeautyBoxGroup.this && child instanceof BeautyBox) {
                  ((BeautyBox) child).setOnCheckedChangeListener(null);
              }
  
              if (mOnHierarchyChangeListener != null) {
                  mOnHierarchyChangeListener.onChildViewRemoved(parent, child);
              }
          }
      }
  }