java.lang.IllegalArgumentException: pointerIndex out of range Exception - dispatchTouchEvent

Question

I have this method in my custom view which extends FrameLayout:

@Override public boolean dispatchTouchEvent(MotionEvent ev) {     int currentItem = vp.getCurrentItem();     if (inDragPanelZone(currentItem, ev.getX(), ev.getY()) && ev.getAction() == MotionEvent.ACTION_DOWN) {               if (!shouldAllowPaging()) {              return true;          }         vp.setPagingEnabled(true);     }     return super.dispatchTouchEvent(ev); } 

Once in a while - I'm getting the following Exception:

java.lang.IllegalArgumentException: pointerIndex out of range at android.view.MotionEvent.nativeGetAxisValue(Native Method) at android.view.MotionEvent.getX(MotionEvent.java:1995) at android.support.v4.view.MotionEventCompatEclair.getX(MotionEventCompatEclair.java:32) at android.support.v4.view.MotionEventCompat$EclairMotionEventVersionImpl.getX(MotionEventCompat.java:86) at android.support.v4.view.MotionEventCompat.getX(MotionEventCompat.java:210) at android.support.v4.view.ViewPager.onTouchEvent(ViewPager.java:1734) at android.view.View.dispatchTouchEvent(View.java:5710) at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1951) at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1712) at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1957) at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1726) at MyView.dispatchTouchEvent(DraggablePane.java:176) at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1957) at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1726) at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1957) at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1726) at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1957) at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1726) at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1918) at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1377) at android.app.Activity.dispatchTouchEvent(Activity.java:2391) at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1866) at android.view.View.dispatchPointerEvent(View.java:5890) at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:3077) at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2619) at android.view.ViewRootImpl.processInputEvents(ViewRootImpl.java:983) at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2628) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:4512) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:511) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:794) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:561) at dalvik.system.NativeStart.main(Native Method) 

I also tried using onInterceptTouchEvent() and got the same exception.

Here is an additional stacktrace:

java.lang.IllegalArgumentException: pointerIndex out of range     at android.view.MotionEvent.nativeGetAxisValue(Native Method)     at android.view.MotionEvent.getX(MotionEvent.java:2013)     at android.support.v4.view.MotionEventCompatEclair.getX(MotionEventCompatEclair.java:32)     at android.support.v4.view.MotionEventCompat$EclairMotionEventVersionImpl.getX(MotionEventCompat.java:86)     at android.support.v4.view.MotionEventCompat.getX(MotionEventCompat.java:210)     at android.support.v4.view.ViewPager.onTouchEvent(ViewPager.java:1734)     at android.view.View.dispatchTouchEvent(View.java:5724)     at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1964)     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1725)     at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1970)     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1739)     at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1970)     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1739)     at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1970)     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1739)     at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1970)     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1739)     at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2071)     at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1405)     at android.app.Activity.dispatchTouchEvent(Activity.java:2426)     at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2019)     at android.view.View.dispatchPointerEvent(View.java:5904)     at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:3155)     at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2670)     at android.view.ViewRootImpl.processInputEvents(ViewRootImpl.java:1000)     at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1014)     at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2644)     at android.os.Handler.dispatchMessage(Handler.java:99)     at android.os.Looper.loop(Looper.java:137)     at android.app.ActivityThread.main(ActivityThread.java:4517)     at java.lang.reflect.Method.invokeNative(Native Method)     at java.lang.reflect.Method.invoke(Method.java:511)     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:993)     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:760)     at dalvik.system.NativeStart.main(Native Method) 

Answer 1

There is a bug in 2.1 (Eclair) where the pointer index isn't checked and is sometimes -1. You can create a custom view that extends ViewPager, override onTouchEvent and wrap the call to super.onTouchEvent in a try/catch. Whilst not a very pretty fix, I remember that it has no side effects (like missed touch events).

Answer 2

Adding to the above answer Also you can try Overriding onInterceptTouchEvent method and surround super.onInterceptTouchEvent(ev) with try and catch worked for me in a ViewPager

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