java - ListView random IndexOutOfBoundsException on Froyo

Question

I have an app with tons of downloads and I'm receiving a lot of this error:

 16783         AndroidRuntime  E  java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0
 16783         AndroidRuntime  E    at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:257)
 16783         AndroidRuntime  E    at java.util.ArrayList.get(ArrayList.java:311)
 16783         AndroidRuntime  E    at android.widget.HeaderViewListAdapter.isEnabled(HeaderViewListAdapter.java:16
                                  4)
 16783         AndroidRuntime  E    at android.widget.ListView.dispatchDrawWithExcessScroll_Default(ListView.java:3
                                  288)
 16783         AndroidRuntime  E    at android.widget.ListView.dispatchDraw(ListView.java:3029)
 16783         AndroidRuntime  E    at android.view.View.draw(View.java:6743)
 16783         AndroidRuntime  E    at android.widget.AbsListView.draw(AbsListView.java:2549)
 16783         AndroidRuntime  E    at android.view.ViewGroup.drawChild(ViewGroup.java:1640)
 16783         AndroidRuntime  E    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
 16783         AndroidRuntime  E    at android.view.View.draw(View.java:6743)
 16783         AndroidRuntime  E    at android.view.ViewGroup.drawChild(ViewGroup.java:1640)
 16783         AndroidRuntime  E    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
 16783         AndroidRuntime  E    at android.view.ViewGroup.drawChild(ViewGroup.java:1638)
 16783         AndroidRuntime  E    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
 16783         AndroidRuntime  E    at android.view.ViewGroup.drawChild(ViewGroup.java:1638)
 16783         AndroidRuntime  E    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
 16783         AndroidRuntime  E    at android.view.ViewGroup.drawChild(ViewGroup.java:1638)
 16783         AndroidRuntime  E    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
 16783         AndroidRuntime  E    at android.view.ViewGroup.drawChild(ViewGroup.java:1638)
 16783         AndroidRuntime  E    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
 16783         AndroidRuntime  E    at android.view.ViewGroup.drawChild(ViewGroup.java:1638)
 16783         AndroidRuntime  E    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
 16783         AndroidRuntime  E    at android.view.ViewGroup.drawChild(ViewGroup.java:1638)
 16783         AndroidRuntime  E    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
 16783         AndroidRuntime  E    at android.view.ViewGroup.drawChild(ViewGroup.java:1638)
 16783         AndroidRuntime  E    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
 16783         AndroidRuntime  E    at android.view.View.draw(View.java:6743)
 16783         AndroidRuntime  E    at android.view.ViewGroup.drawChild(ViewGroup.java:1640)
 16783         AndroidRuntime  E    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
 16783         AndroidRuntime  E    at android.view.ViewGroup.drawChild(ViewGroup.java:1638)
 16783         AndroidRuntime  E    at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
 16783         AndroidRuntime  E    at android.view.View.draw(View.java:6743)
 16783         AndroidRuntime  E    at android.widget.FrameLayout.draw(FrameLayout.java:352)
 16783         AndroidRuntime  E    at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java
                                  :1885)
 16783         AndroidRuntime  E    at android.view.ViewRoot.draw(ViewRoot.java:1407)
 16783         AndroidRuntime  E    at android.view.ViewRoot.performTraversals(ViewRoot.java:1163)
 16783         AndroidRuntime  E    at android.view.ViewRoot.handleMessage(ViewRoot.java:1727)
 16783         AndroidRuntime  E    at android.os.Handler.dispatchMessage(Handler.java:99)
 16783         AndroidRuntime  E    at android.os.Looper.loop(Looper.java:123)
 16783         AndroidRuntime  E    at android.app.ActivityThread.main(ActivityThread.java:4627)
 16783         AndroidRuntime  E    at java.lang.reflect.Method.invokeNative(Native Method)
 16783         AndroidRuntime  E    at java.lang.reflect.Method.invoke(Method.java:521)
 16783         AndroidRuntime  E    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:8
                                  58)
 16783         AndroidRuntime  E    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
 16783         AndroidRuntime  E    at dalvik.system.NativeStart.main(Native Method)

As you can see in the stack trace, there is not one line with my code trace in it. To reproduce this, I luckily found an user with a Froyo (2.2 p7) and I just scrolled down one of the ListViews on the code. After some random time, it just froze with this exception. This happens every time at a different time.

It is a ListView with an EndlessAdapter behind it, just adding more and more rows. Apparently I get this error when I do the "over-scroll" but I cannot even think of a way to fix this. It is hard enough to reproduce, but with almost 200 users online at every time, if they keep getting this error they will end up not using the app anymore.

Any help would be appreciated.

EDIT: There has been a similar issue with someone else with the EndlessAdapter. http://groups.google.com/group/cw-android/browse_thread/thread/4739ce05742841da/af59c779e99f5e23?lnk=gst&q=index#af59c779e99f5e23

But it's not EndlessAdapter's fault. It's android's fault.

Answer 1

After a lot of time checking the android source code and not understanding this error I've finally cracked it.

The problem occurs with Samsung phones, they have a different implementation on the over-scroll functionality and that ended up throwing this exception as it tried to select a footer/header out of bounds (even when there is no footer view).

The solution I used is not pretty but it will stop this error from happening ever again.

class MyFixedListView extends ListView {
    @Override
    protected void dispatchDraw(Canvas canvas) {
        try {
            super.dispatchDraw(canvas);
        } catch (IndexOutOfBoundsException e) {
            // samsung error
        }
    }
}

Now I use this ListView implementation and the error is gone.

I really hope this helps anyone using endless adapters.