Drag a view on touch and back to origin position on touch release

Question

I want to touch drag a view all around the screen and on touch release I want to bring the view back to its origin position.

Here's my code:

private float xCoOrdinate, yCoOrdinate;
private float top2AxOriginXCoordinate, top2AxOriginYCoordinate;

private void initControls(View view) {
    top2AX = view.findViewById(R.id.top2AX);
    top2AxOriginXCoordinate = top2AX.getX();
    top2AxOriginYCoordinate = top2AX.getY();
    addDragListener();
}

private void addDragListener() {
     myView.setOnTouchListener(new View.OnTouchListener() {

            @Override
            public boolean onTouch(View view, MotionEvent event) {
                switch (event.getActionMasked()) {
                    case MotionEvent.ACTION_DOWN:
                        xCoOrdinate = view.getX() - event.getRawX();
                        yCoOrdinate = view.getY() - event.getRawY();
                        break;
                    case MotionEvent.ACTION_MOVE:
                        view.animate().x(event.getRawX() + xCoOrdinate).y(event.getRawY() + yCoOrdinate).setDuration(0).start();
                        break;
                    case MotionEvent.ACTION_UP:
                        view.animate().x(top2AxOriginXCoordinate).y(top2AxOriginYCoordinate).setDuration(500).start();
                        break;
                    default:
                        return false;
                }
                return true;
            }
        });
}

The touch and drag is working perfectly, but when I release touch its not coming back to its origin position. It goes to the top left of the screen with a slight left margin. What am I doing wrong here?

score 1 · Accepted Answer · answered Feb 02 '18 at 12:29

1

 top2AxOriginXCoordinate = top2AX.getX();
top2AxOriginYCoordinate = top2AX.getY();

may be this two variables are 0.0 , if it's so then told me I'll help you

answered Feb 02 '18 at 12:29

Ara Hakobyan

1,682
1
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1

Yes, They were zero. I've resolved it now. Thanks for your help – Drunken Daddy Feb 02 '18 at 13:58

score 0 · Answer 2 · answered Sep 19 '22 at 16:53

I was facing the same issue but an important point to note is that you will get 0 until Android lays & renders out the view on the screen.

The proper way is by adding an observer to your view & then setting the position this way

 yourView.getViewTreeObserver().addOnGlobalLayoutListener(
            new ViewTreeObserver.OnGlobalLayoutListener() {
                @Override
                public void onGlobalLayout() {
                    top2AxOriginXCoordinate = top2AX.getX();
                    top2AxOriginYCoordinate = top2AX.getY();

                    // Remove the listener afterwards
                    yourView.getViewTreeObserver().removeOnGlobalLayoutListener(this);
                }
            });

Drag a view on touch and back to origin position on touch release

2 Answers2