public View findTargetView(float x, float y, View anchorView) {
    ArrayList<View> touchablesView = anchorView.getTouchables();
    View targetView = null;
    for (View child : touchablesView) {
      RectF rectF = getViewRectF(child);
      if (rectF.contains(x, y) && child.isClickable()) {
        // 这说明被点击的view找到了
        targetView = child;
        break;
      }
    }
    return targetView;
  }

  public RectF getViewRectF(View view) {
    int[] location = new int[2];
    view.getLocationOnScreen(location);
    int childLeft = location[0];
    int childTop = location[1];
    int childRight = childLeft + view.getMeasuredWidth();
    int childBottom = childTop + view.getMeasuredHeight();
    return new RectF(childLeft, childTop, childRight, childBottom);
  }

  float left = circleCenterX - targetTouchRectF.left;
  float right = targetTouchRectF.right - circleCenterX;
  float top = circleCenterY - targetTouchRectF.top;
  float bottom = targetTouchRectF.bottom - circleCenterY;
  // 计算出最大的值则为半径
  rawRadius = Math.max(bottom, Math.max(Math.max(left, right), top));

  /**
   * 获取圆环的中心坐标
   */
  public float[] getCircleCenterPostion(float x,float y){
    int[] location = new int[2];
    float[] mDownPositon = new float[2];
    getLocationOnScreen(location );
    mDownPositon[0] = x;
    mDownPositon[1] = y -location[1];
    return mDownPositon;
  }

  @Override
  protected void dispatchDraw(Canvas canvas) {
    super.dispatchDraw(canvas);
    /**
     * 绘制完子元素后开始绘制波纹
     */
    if (mTargetTouchView != null) {
      RectF clipRectF = clipRectF(mTargetTouchView);
      canvas.save();
      // 为了不让绘制的圆环超出所要绘制的范围
      canvas.clipRect(clipRectF);
      if(drawedRadius < rawRadius){
        drawedRadius += rawRadius / drawingRadiusDegrees;
        canvas.drawCircle(mDownPositon[0], mDownPositon[1], drawedRadius, mHalfTransPaint);
        postInvalidateDelayed(INVALID_DURATION);
      }else{
        canvas.drawCircle(mDownPositon[0], mDownPositon[1], rawRadius, mTransPaint);
        post(delayedRunnable);
      }
      canvas.restore();
    }
  }

  if (ev.getAction() == MotionEvent.ACTION_UP) {
      // 需要让波纹绘制完毕后再执行在up中执行的方法
//     if(drawedRadius==0){
//       return false;
//     }
//     long totalTime = (long) (INVALID_DURATION * (drawingRadiusDegrees+5));
//     // 离波纹结束的时间
//     long time = (long) (totalTime - drawedRadius*totalTime / rawRadius);
      delayedRunnable.event = ev;
      return true;
  }

  class postUpEventDelayed implements Runnable{
    private MotionEvent event;
    @Override
    public void run() {
      if(mTargetTouchView!=null && mTargetTouchView.isClickable()
          && event!=null){
        mTargetTouchView.dispatchTouchEvent(event);// 分发
      }
    }
  }