move, rotation and zoom in\out on View

Question

I'm new to android development and I need to develop view with some specifications

move by touch
scale by pinch (zoom in\out)
rotation using two fingures

I've developed rotation by using these steps here but there are some issues like jumping view if one finger removed suddenly.

and for move used this code it works well but think it is issue in sudden movement.

 public static View.OnTouchListener getTouchListener(){
    View.OnTouchListener onTouchListener = new View.OnTouchListener() {
        int prevX, prevY;
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            final ConstraintLayout.LayoutParams par = (ConstraintLayout.LayoutParams) v.getLayoutParams();
            switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN: {
                    v.bringToFront();
                    prevX = (int) event.getRawX();
                    prevY = (int) event.getRawY();
                    par.bottomMargin = -8 * v.getHeight();
                    par.rightMargin = -8 * v.getWidth();
                    v.setLayoutParams(par);
                    return true;
                }
                case MotionEvent.ACTION_MOVE: {
                    par.topMargin += (int) event.getRawY() - prevY;
                    prevY = (int) event.getRawY();
                    par.leftMargin += (int) event.getRawX() - prevX;
                    prevX = (int) event.getRawX();
                    v.setLayoutParams(par);
                    return true;
                }
            }
            return false;
        }
    };
    return onTouchListener;
}

I need someone help me to get the three features together without any issues Hint: if there is library it is welcomed.

Have you checked gitHub? it has lots of libraries probably with this implementation already. — Kristofer, Mar 30 '18 at 23:06
@Kristofer i checked it but what i find is implemented to work on images only and i need it for a different view if there is one like this, please mention one — Moustafa EL-Saghier, Mar 30 '18 at 23:09

score 4 · Accepted Answer · answered Mar 31 '18 at 19:05

4

After long of searching about how to implement something like that, I finally found a repository on GitHub solving my issue you can find classes for doing that here

and way to use the classes is:

        yourView.setOnTouchListener(new MultiTouchListener());

in this way you can scale, zoom in/out (by pinch) and rotate the view by pinch too.

answered Mar 31 '18 at 19:05

Moustafa EL-Saghier

1,721
1
13
43

I'm not able to rotate surface view using this. Please guide me. – Harsh Suvagiya Sep 14 '22 at 05:57
can you create question please and let us see your full code? – Moustafa EL-Saghier Sep 15 '22 at 12:31

score 1 · Answer 2 · answered Mar 31 '18 at 19:26

1

the perfect example of what u r searching is here:see here(example)

Happy coding!

answered Mar 31 '18 at 19:26

Mihir Joshi

117
4

thank you but your example is for imageView I needed it on any view. or you mean I can do the sane to any other view? – Moustafa EL-Saghier Apr 01 '18 at 05:43
For the newcomers, the above also works for any View, its given in that tutorial – Gulshan Jangid May 18 '20 at 13:10
@Mihir Joshi your link is broken – Kishan Solanki Mar 03 '23 at 12:41

move, rotation and zoom in\out on View

2 Answers2