@Override
  public boolean onInterceptTouchEvent(MotionEvent event) {
    final int action = event.getAction();
    final float x = event.getX();
    final float y = event.getY();

    if (mAnimating) {
      return false;
    }

    View leftHandle = mLeftSlider.tab;
    leftHandle.getHitRect(mTmpRect);
    boolean leftHit = mTmpRect.contains((int) x, (int) y);

    View rightHandle = mRightSlider.tab;
    rightHandle.getHitRect(mTmpRect);
    boolean rightHit = mTmpRect.contains((int) x, (int) y);

    if (!mTracking && !(leftHit || rightHit)) {
      return false;
    }

    switch (action) {
      case MotionEvent.ACTION_DOWN:
        {
          mTracking = true;
          mTriggered = false;
          vibrate(VIBRATE_SHORT);
          if (leftHit) {
            mCurrentSlider = mLeftSlider;
            mOtherSlider = mRightSlider;
            mThreshold = isHorizontal() ? THRESHOLD : 1.0f - THRESHOLD;
            setGrabbedState(OnTriggerListener.LEFT_HANDLE);
          } else {
            mCurrentSlider = mRightSlider;
            mOtherSlider = mLeftSlider;
            mThreshold = isHorizontal() ? 1.0f - THRESHOLD : THRESHOLD;
            setGrabbedState(OnTriggerListener.RIGHT_HANDLE);
          }
          mCurrentSlider.setState(Slider.STATE_PRESSED);
          mCurrentSlider.showTarget();
          mOtherSlider.hide();
          break;
        }
    }

    return true;
  }
 private void cancelGrab() {
   mTracking = false;
   mTriggered = false;
   mOtherSlider.show(true);
   mCurrentSlider.reset(false);
   mCurrentSlider.hideTarget();
   mCurrentSlider = null;
   mOtherSlider = null;
   setGrabbedState(OnTriggerListener.NO_HANDLE);
 }
  @Override
  public boolean onTouchEvent(MotionEvent event) {
    if (mTracking) {
      final int action = event.getAction();
      final float x = event.getX();
      final float y = event.getY();

      switch (action) {
        case MotionEvent.ACTION_MOVE:
          if (withinView(x, y, this)) {
            moveHandle(x, y);
            float position = isHorizontal() ? x : y;
            float target = mThreshold * (isHorizontal() ? getWidth() : getHeight());
            boolean thresholdReached;
            if (isHorizontal()) {
              thresholdReached =
                  mCurrentSlider == mLeftSlider ? position > target : position < target;
            } else {
              thresholdReached =
                  mCurrentSlider == mLeftSlider ? position < target : position > target;
            }
            if (!mTriggered && thresholdReached) {
              mTriggered = true;
              mTracking = false;
              mCurrentSlider.setState(Slider.STATE_ACTIVE);
              boolean isLeft = mCurrentSlider == mLeftSlider;
              dispatchTriggerEvent(
                  isLeft ? OnTriggerListener.LEFT_HANDLE : OnTriggerListener.RIGHT_HANDLE);

              startAnimating(isLeft ? mHoldLeftOnTransition : mHoldRightOnTransition);
              setGrabbedState(OnTriggerListener.NO_HANDLE);
            }
            break;
          }
          // Intentionally fall through - we're outside tracking rectangle

        case MotionEvent.ACTION_UP:
        case MotionEvent.ACTION_CANCEL:
          cancelGrab();
          break;
      }
    }

    return mTracking || super.onTouchEvent(event);
  }