onTouchEvent.java

@Override
public boolean onTouchEvent(MotionEvent event) {
	if (mEnabled) {
		this.getParent().requestDisallowInterceptTouchEvent(true);

		switch (event.getAction()) {
			case MotionEvent.ACTION_DOWN:
				if (mOnSwagPointsChangeListener != null)
					mOnSwagPointsChangeListener.onStartTrackingTouch(this);
				updateOnTouch(event);
				break;
			case MotionEvent.ACTION_MOVE:
				updateOnTouch(event);
				break;
			case MotionEvent.ACTION_UP:
				if (mOnSwagPointsChangeListener != null)
					mOnSwagPointsChangeListener.onStopTrackingTouch(this);
				setPressed(false);
				this.getParent().requestDisallowInterceptTouchEvent(false);
				break;
			case MotionEvent.ACTION_CANCEL:
				if (mOnSwagPointsChangeListener != null)
					mOnSwagPointsChangeListener.onStopTrackingTouch(this);
				setPressed(false);
				this.getParent().requestDisallowInterceptTouchEvent(false);
				break;
		}
		return true;
	}
	return false;
}