问当从另一个视图拖动时，如何检测视图已被触摸

EN

@Override
public boolean onTouchEvent(MotionEvent event) {

    float xCoord = event.getX();
    float yCoord = event.getY();

    switch (event.getAction()) {
        case MotionEvent.ACTION_DOWN:
            // Using X and Y coordinates, find out if touch event is on top of a view.
            // Mark the view as touched
            return true;
        case MotionEvent.ACTION_UP:
            // Action required once touch released.
            return true;
        default:
           // When dragging, the default case will be called.
           // Using X and Y coordinates, figure out if finger goes over a view.
           // If you don't want same behaviour when going back to previous view,
           // then mark it so you can ignore it if user goes back to previous view.

    }
}