Bugfix: Problem with multitouch (incorrect touchId on android)

cocos2d-x C++
#1

How to repeat:

  1. Touch the screen with three fingers: 1 2 3.
  2. Release 2nd finger
  3. Release 3rd finger
    Result: the method CCTouchDispatcher::touchesEnded will not be called for the 3rd touch.

Resolution (patch) for Cocos2dxGLSurfaceView.java:

@@ -282,7 +282,7 @@ public class Cocos2dxGLSurfaceView extends GLSurfaceView {


         switch (event.getAction() & MotionEvent.ACTION_MASK) {

         case MotionEvent.ACTION_POINTER_DOWN:

-           final int idPointerDown = event.getAction() >> MotionEvent.ACTION_POINTER_ID_SHIFT;

+           final int idPointerDown = event.getPointerId(event.getAction() >> MotionEvent.ACTION_POINTER_ID_SHIFT);

             final float xPointerDown = event.getX(idPointerDown);

             final float yPointerDown = event.getY(idPointerDown);



@@ -318,7 +318,7 @@ public class Cocos2dxGLSurfaceView extends GLSurfaceView {
             break;



         case MotionEvent.ACTION_POINTER_UP:

-           final int idPointerUp = event.getAction() >> MotionEvent.ACTION_POINTER_ID_SHIFT;

+           final int idPointerUp = event.getPointerId(event.getAction() >> MotionEvent.ACTION_POINTER_ID_SHIFT);

             final float xPointerUp = event.getX(idPointerUp);

             final float yPointerUp = event.getY(idPointerUp);

After this patch everything works ok.

#2

Oh, your version of cocos2d-x is too old.

#3

I see :slight_smile: the bug has already been fixed, sorry