Move ImageView freely on screen

Question

I have an ImageView in my layout and I want to move it freely everywhere. I have found some tutorials about moving it with OnTouchListener actions (and I've done my job this way but I don't like it) and some people suggest to use drag and drop api (Android 3+ api) but I can't implement it in the way I want (I mean without target, drag and drop api wants target for the dragged view)

can anyone please provide example? (examples of Drag and Drap API)

Here is an example http://thegeekyland.blogspot.com/2015/12/android-animations-explained.html — Arlind Hajredinaj, Dec 10 '15 at 23:24

score 0 · Answer 1 · edited May 23 '17 at 11:52

imageiew.setOnTouchListener(new OnTouchListener() {

    public boolean onTouch(View v, MotionEvent event) {
        // TODO Auto-generated method stub
        drag(event, v);
        return true;
    }
});

and then

       public void drag(MotionEvent event, View v)
    {

        RelativeLayout.LayoutParams params = (android.widget.RelativeLayout.LayoutParams) v.getLayoutParams();

        switch(event.getAction())
        {
           case MotionEvent.ACTION_MOVE:
           {
             params.topMargin = (int)event.getRawY() - (v.getHeight());
             params.leftMargin = (int)event.getRawX() - (v.getWidth()/2);
             v.setLayoutParams(params);
             break;
           }
           case MotionEvent.ACTION_UP:
           {
             params.topMargin = (int)event.getRawY() - (v.getHeight());
             params.leftMargin = (int)event.getRawX() - (v.getWidth()/2);
             v.setLayoutParams(params);
             break;
           }
           case MotionEvent.ACTION_DOWN:
           {
            v.setLayoutParams(params);
            break;
           }
        }

based oh here

He wants `drag and drop` example dude! @payam – Hojjat Imani Dec 17 '15 at 15:57 — Hojjat Imani, Dec 17 '15 at 15:57

score 0 · Answer 2 · edited May 23 '17 at 12:04

you can try this

img.setOnTouchListener(new OnTouchListener()
{
    PointF DownPT = new PointF(); // Record Mouse Position When Pressed Down
    PointF StartPT = new PointF(); // Record Start Position of 'img'

    @Override
    public boolean onTouch(View v, MotionEvent event)
    {
        int eid = event.getAction();
        switch (eid)
        {
            case MotionEvent.ACTION_MOVE :
                PointF mv = new PointF( event.getX() - DownPT.x, event.getY() - DownPT.y);
                img.setX((int)(StartPT.x+mv.x));
                img.setY((int)(StartPT.y+mv.y));
                StartPT = new PointF( img.getX(), img.getY() );
                break;
            case MotionEvent.ACTION_DOWN :
                DownPT.x = event.getX();
                DownPT.y = event.getY();
                StartPT = new PointF( img.getX(), img.getY() );
                break;
            case MotionEvent.ACTION_UP :
                // Nothing have to do
                break;
            default :
                break;
        }
        return true;
    }
});

I got it from here

Move ImageView freely on screen

2 Answers2