Multi touch for different views on android

Question

If I have two buttons in my view and I want to enable OntouchListener for that two buttons at the same time,I mean touching 1st button started one task and holding that 1st button touching 2nd button started another task. How to do it?Waiting for help.

score 6 · Accepted Answer · answered Jul 24 '12 at 12:10

You can add a onTouchListener to that view which will handle multiple touch.

   @Override
public boolean onTouch(View v, MotionEvent event) {
    switch(event.getAction() & MotionEvent.ACTION_MASK) {

    case MotionEvent.ACTION_DOWN:
        //first finger went down
        break;

    case MotionEvent.ACTION_MOVE:
        //a touch placement has changed
        break;

    case MotionEvent.ACTION_UP:
        //first finger went up
        break;

    case MotionEvent.ACTION_CANCEL:
        //gesture aborted (I think this means the finger was dragged outside of the touchscreen)
        break;

    case MotionEvent.ACTION_POINTER_DOWN:
        //second finger (or third, or more) went down.
        break;

    case MotionEvent.ACTION_POINTER_UP:
        //second finger (or more) went up.
        break;

        default: break;
    }
    return true;
}

Check if your button is clicked inside respective cases.

score 3 · Answer 2 · edited Jan 22 '13 at 05:31

Try the following code snippet.

@Override
public boolean onTouch(View v, MotionEvent event) {
switch(event.getAction() & MotionEvent.ACTION_MASK) {

case MotionEvent.ACTION_DOWN:
    //first finger went down
    break;

case MotionEvent.ACTION_MOVE:
    //a touch placement has changed
    break;

case MotionEvent.ACTION_UP:
    //first finger went up
    break;

case MotionEvent.ACTION_CANCEL:
    //gesture aborted (I think this means the finger was dragged outside of the touchscreen)
    break;

case MotionEvent.ACTION_POINTER_DOWN:
  if(mFirstButton.isPressed() && mSecondButton.isPressed())
   {// your code.}
    break;

score 2 · Answer 3 · edited May 23 '17 at 12:22

So I am not sure what you want to accomplish, but you have something like:

private boolean mFirstButtonDown = false;

@Override
public boolean onTouchEvent(MotionEvent event){
    // first button onTouchEvent
    switch (event.getAction()){
       case MotionEvent.ACTION_DOWN:
                            mFirstButtonDown = true;
            break;
       case MotionEvent.ACTION_UP:
                            mFirstButtonDown = false;
            break;
    }
   ....
}

For the second button just check if it is still holded:

 @Override
 public boolean onTouchEvent(MotionEvent event){
   switch (event.getAction()){
       case MotionEvent.ACTION_DOWN:
         if (mFirstButtonDown && (event.getPointerCount() > 1)) {
             // do task
     }
 }

To simultaneously touch 2 buttons use multi-pointers (or multi-touch), you can find more details on this post: Multiple button presses for Android 2.x

Another good article that can help you understand multi-pointers is on Android developers: http://android-developers.blogspot.ro/2010/06/making-sense-of-multitouch.html

The code above is not tested, it should just give you an idea:)

Once one button gets hold another doesn't work.How a Boolean flag can solve this problem ? — Mamun Sardar, Jul 24 '12 at 13:21

score 0 · Answer 4 · answered Jul 24 '12 at 12:13

0

You can either add two separate OnTouchListeners to the two buttons, and indicate the touched state of the buttons with two booleans in your Activity, or you can add a single OnTouchListener to your parent View and compare the touch coordinates of the pointers in the MotionEvent to the two Buttons' coordinates.

answered Jul 24 '12 at 12:13

Adam Monos

4,287
1
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25

But I've already two separate OnTouchListener for that two buttons. Once one button gets hold another doesn't work.How a Boolean flag can solve this problem ? – Mamun Sardar Jul 24 '12 at 13:19
Add `button1.isPressed()` inside the `OnTouchListener` of your second button to check if first button is pressed. – JiTHiN Jul 25 '12 at 03:17
@MamunSardar I am facing the same issue were you able to resolve it?. When one part of my screen is pressed there are no touch events registered after that. – Vishwesh Shetty Feb 23 '13 at 18:20

score 0 · Answer 5 · answered Apr 21 '15 at 17:21

it is quite simple @Override public boolean onTouch(View v, MotionEvent arg1) { switch (v.getId()) { case R.id.button1:
if(arg1.getAction()==MotionEvent.ACTION_DOWN) { //your event } break; case R.id.button2: if(arg1.getAction()==MotionEvent.ACTION_DOWN) { //your event } break; default: break; } return true; }

Multi touch for different views on android

5 Answers5