Android work multitouch button

Question

Hi i want to create 2 Button and i want to multitouch ??

i tryed to do but no example in internet..

So if you got one can you share or can you give me opinio

Answer 1

I was a little bored with this subject and i made an handler class for leading with multitouch buttons. Feel free to use and/or update that.

//CLASS TO HANDLE THE EVENT
    public class MultitouchButtonHandler {
            ArrayList views_info = new ArrayList();
            public MultitouchButtonHandlerResult onTouchEvent(View v, MotionEvent ev) {

            //GET EVENT INFO 
            final int action = ev.getAction();
            int action_masked = action & MotionEvent.ACTION_MASK;
            if(action_masked==MotionEvent.ACTION_MOVE){
                return null;
            }

                //GET ABSOLUTE SIZE AND CHECK IF THIS ANY VIEW ATTACHED TO THIS POSITION
                final int original_location[] = { 0, 0 };
                v.getLocationOnScreen(original_location);
                final int actionPointerIndex = ev.getActionIndex();
                float rawX = (int) ev.getX(actionPointerIndex) + original_location[0];
                float rawY = (int) ev.getY(actionPointerIndex) + original_location[1];
                View eventView = getViewByLocation((int)rawX, (int)rawY);
                if(eventView==null) return null;

                MultitouchButtonHandlerResult result = new MultitouchButtonHandlerResult();
                result.view  = eventView;


                //CHECK WHAT KIND OF EVENT HAPPENED 
                switch (action_masked) {
                case MotionEvent.ACTION_DOWN: {
                    result.event_type = MotionEvent.ACTION_DOWN;
                    return result;
                }

                case MotionEvent.ACTION_UP: {
                    result.event_type = MotionEvent.ACTION_UP;
                    return result;
                }

                case MotionEvent.ACTION_CANCEL: {
                    result.event_type = MotionEvent.ACTION_CANCEL;
                    return result;
                }

                case MotionEvent.ACTION_POINTER_UP: {
                    result.event_type = MotionEvent.ACTION_UP;
                    return result;
                }

                case MotionEvent.ACTION_POINTER_DOWN: {
                    result.event_type = MotionEvent.ACTION_DOWN;
                    return result;
                }

                default:

                break;

                }

                return null;
            }

            public void addMultiTouchView(View v){
                views_info.add(v);;
            }
            public void removeMultiTouchView(View v){
                views_info.remove(v);;
            }

            public View getViewByLocation(int x, int y){

                for(int key=0; key!= views_info.size(); key++){
                    View v = views_info.get(key);
                    //GET BUTTON ABSOLUTE POSITION ON SCREEN
                    int[] v_location = { 0, 0 };
                    v.getLocationOnScreen(v_location);

                    //FIND THE BOUNDS
                    Point min = new Point(v_location[0], v_location[1]);
                    Point max = new Point(min.x + v.getWidth(), min.y + v.getHeight());


                    if(x>=min.x && x<=max.x && y>=min.y && y<=max.y){
                        //Log.d("mylog", "***Found a view: " + v.getId());
                        return v;
                    }

                }

                //Log.d("mylog", "Searching: " + x +", " + y + " but not found!");

                return null;
            }

        }

//CLASS TO FULLFILL WITH RESULT
public class MultitouchButtonHandlerResult {
    public View view;
    public int event_type;
}

//In your view 
private OnTouchListener listener_touch_button = new OnTouchListener() {

@Override
public boolean onTouch(View v, MotionEvent event) {
      MultitouchButtonHandlerResult result=multitouch_handler.onTouchEvent(v, event);
     if(result==null) return true;

                switch(result.event_type){
                    case MotionEvent.ACTION_DOWN:
                        Log.d("mylog", "DOWN");
                break;
                    case MotionEvent.ACTION_UP:
                        Log.d("mylog", "UP");
                break;
                    case MotionEvent.ACTION_CANCEL:
                            Log.d("mylog", "CANCEL");
                break;

                }

               Log.d("mylog", "View ID: " + result.view.getId());

               return false;
      }

 };