Question

I have a view in a linearlayout. When the view is longpressed the view will be removed from this linearlayout and placed, on the same position of the screen, to a relative layout. On this way a can move the view over the screen with my finger.

it almost works:
i got the longpress event working (remove the view and place the view to the relativelayout). after that i add an ontoucheventlistener so my view stays with my finger, but only for a second. the last time the touchevent is fired i got “MotionEvent.ACTION_CANCEL”. When i remove my finger and place my finger again to the view i can go feature with my movement, then it will keep until i remove my finger.

I think that my problem is that the view it removed for a short moment, at that time i get a “MotionEvent.ACTION_CANCEL”, however, there are still some unhandled events, they will be fired first. Thats why i got for about 1 second still ontouchevents. (this is just a thought).

someone a idee how i can keep the ontouchevent, or let the ontouchevent fired without replacing my finger?

Edited

My thought is not correct. When i do a longpress the view stays with my finger, however i lost the view as soon as i move about 50 to 100 pixels to any direction.

Edited 2

the longpress code of the view inside the linearlayout

view.setOnLongClickListener(new OnLongClickListener() {
    public boolean onLongClick(View v) {
        _linearLayout.removeView(v);
        moveView(v);
        return true;
    }
});

moveView will be called by the longpress

private void moveView(View v) {
        _relativeLayout.addView(v);
        v.setOnTouchListener(new OnTouchListener() {
            public boolean onTouch(View v, MotionEvent event) {
                switch(event.getAction()) {
                case MotionEvent.ACTION_MOVE:
                    int x = (int) event.getRawX();
                    int y = (int) event.getRawY();                          
                    v.layout(x, y, x + v.getWidth(), y + v.getHeight());
                    break;
                case MotionEvent.ACTION_UP:
                    _relativeLayout.removeView(v);
                    v = null;
                    break;
                case MotionEvent.ACTION_CANCEL:
                    //it comes here when i move my finger more then 100 pixels
                    break;
                }
                return true;
            }
        });
    }

of corse, this is the relevant part of the code and not the original code

Answer 1

Have a look at the Experience – Android Drag and Drop List post. There is also a source code that does something very similar to what are you trying to get. Eric, the author of that post, uses a separate temporary ImageView to hold a dragged view image, taken with getDrawingCache(). He also hides the original list item by setVisibility(View.INVISIBLE).

In the DragNDrop project (link above) you can replace drag(0,y) calls by drag(x,y) in DragNDrop.java to see a dragging in all directions.