@Override
protected void onDetachedFromWindow() {
cancelDragging();
super.onDetachedFromWindow();
}
/*
* Determines if we should change the touch state to start scrolling after the
* user moves their touch point too far.
*/
protected void determineScrollingStart(MotionEvent ev) {
if (!mIsDragging) super.determineScrollingStart(ev);
}