How to detect the view touch outside dragging?

Question

I'm trying to code an imageView click feedback using the onTouch method. My code is used to scale the imageView when pressed(MotionEvet.ACTION_DOWN) and return to its normal size when the user stop pressing(MotionEvet.ACTION_UP). But what I'm not able to code is the action when the user drags its finger out of the imageView.

I've seen a solution which tells to use MotionEvent.ACTION_CANCEL at the beginning of the switch statement, but this doesn't work for me.

My code is the next one:

public boolean onTouch(View v, MotionEvent event) {
        int action = event.getAction();

        switch (action) {

        case MotionEvent.ACTION_CANCEL:
        clickOutTransformation(ico);
        return true;

        case MotionEvent.ACTION_UP:
        clickOutTransformation(ico);

         switch (i) {
            case 1:
            fondoApp.setBackgroundResource(R.drawable.back_blue_bubbles_lite);
            i++;
            break;
            case 2:
            fondoApp.setBackgroundResource(R.drawable.back_espectrum);
            i++;
            break;
            case 3:
            fondoApp.setBackgroundResource(R.drawable.back_black_and_violet);
            i++;
            break;
            case 4:
            fondoApp.setBackgroundResource(R.drawable.back_green);
            i++;
            break;
            case 5:
            fondoApp.setBackgroundResource(R.drawable.back_blur_blue_ed);
            i = 1;
            break;

            default:
            break;
            }
            return true;

            case MotionEvent.ACTION_DOWN:
            clickInTransformation(ico);
            return true;

            default:
            break;

            }
             return false;

            }

score 1 · Answer 1 · answered May 03 '21 at 06:32

you can get it with this solution:

private Rect rect;    // Variable rect to hold the bounds of the view

public boolean onTouch(View v, MotionEvent event) {
    switch (event.getAction()) {
        case MotionEvent.ACTION_UP:
            if (!rect.contains(v.getLeft() + (int) event.getX(), v.getTop() + (int) event.getY())) {
                // User moved outside bounds
            }
            break;
        case MotionEvent.ACTION_DOWN:
            rect = new Rect(v.getLeft(), v.getTop(), v.getRight(), v.getBottom());
            break;
    }
    return false;
}

score 0 · Answer 2 · answered Oct 16 '14 at 12:30

0

Use if case: MotionEvent.ACTION_DOWN for scaling and case MotionEvent.ACTION_UP: for scaling down to normal size ...

ACTION_DOWN fires, when you touch you screen and ACTION_UP fires, when you take off you finger from view

answered Oct 16 '14 at 12:30

MrDumb

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That's the way it's programmed... What do you mean? – Joe Hackerberg Oct 16 '14 at 16:42
That runs good but what I want is to detect the movement out of the view and MotionEvent.ACTION_MOVE reacts on any finger movement, even inside of the view – Joe Hackerberg Oct 17 '14 at 13:44

How to detect the view touch outside dragging?

2 Answers2