pointerIndex out of range Android multitouch

Question

I have a touch event exception that is causing my game to crash on tablets (or more specifically, honeycomb)... My game works fine on my phone and I haven't heard of this happening to anyone that isn't running Android 3.0 or higher. Here is the relevant log info...

E/AndroidRuntime(26487): java.lang.IllegalArgumentException: pointerIndex out of range
E/AndroidRuntime(26487):    at android.view.MotionEvent.nativeGetAxisValue(Native Method)
E/AndroidRuntime(26487):    at android.view.MotionEvent.getX(MotionEvent.java:1549)
E/AndroidRuntime(26487):    at kieran.android.asteroids.GameUI.onTouchEvent(GameUI.java:665)
E/AndroidRuntime(26487):    at android.view.View.dispatchTouchEvent(View.java:4616)
E/AndroidRuntime(26487):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1560)
E/AndroidRuntime(26487):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1291)
E/AndroidRuntime(26487):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1560)
E/AndroidRuntime(26487):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1291)
E/AndroidRuntime(26487):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1560)
E/AndroidRuntime(26487):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1291)

... And here is the code that is calling it. Seems fine to me, but maybe there is a bug in honeycomb that hasn't been fixed yet? The line number 665 from the log above corresponds to the float x = event.getX(id); line. It must have something to do with the way I am getting the which variable maybe? But it works fine on the phones/2.3 and lower...

int action = event.getAction();
int actionCode = action & MotionEvent.ACTION_MASK;

if(actionCode == MotionEvent.ACTION_POINTER_UP || action == MotionEvent.ACTION_UP) {
    int which = action >> MotionEvent.ACTION_POINTER_ID_SHIFT;
    int id = event.getPointerId(which);
    float x = event.getX(id);
    float y = event.getY(id);

Any help/ideas would be greatly appreciated as I am trying to make my game available to tablet users as well. Thanks.

user_4517450 · Answer

For those who are still looking for answers please note that this may happen also when you are using any ViewPager with some Zooming or Scaling features on image etc inside it. Then there is a possibility you can get this Exception as well.

Solution:

Extend the existing ViewPager and override these methods with try catch.

@Override
public boolean onTouchEvent(MotionEvent ev) {
    try {
        return super.onTouchEvent(ev);
    } catch (IllegalArgumentException ex) {
        ex.printStackTrace();
    }
    return false;
}

@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
    try {
        return super.onInterceptTouchEvent(ev);
    } catch (IllegalArgumentException ex) {
        ex.printStackTrace();
    }
    return false;
}

pointerIndex out of range Android multitouch

6 Answers