I am also facing the same issue, not sure this is framework issue or
application issue.
Any experts have a say on this issue?
(I am working with Android 1.5 SDK)

On Jun 17, 2:26 pm, roland <roland...@gmail.com> wrote:
> I just found a strange issue in my application which contains a
> ListView. When one item is clicked, a TabActivity will be launched, i
> got a NullPointerException when i press the item by using trackball.
> But it's fine when i press the item by using finger.
>
> This is the logcat message:
> D/AndroidRuntime(32224): Shutting down VM
> W/dalvikvm(32224): threadid=3: thread exiting with uncaught exception
> (group=0x4000fe70)
> E/AndroidRuntime(32224): Uncaught handler: thread main exiting due to
> uncaught exception
> E/AndroidRuntime(32224): java.lang.NullPointerException
> E/AndroidRuntime(32224):        at android.widget.TabHost.onTouchModeChanged
> (TabHost.java:178)
> E/AndroidRuntime(32224):        at
> android.view.ViewTreeObserver.dispatchOnTouchModeChanged
> (ViewTreeObserver.java:591)
> E/AndroidRuntime(32224):        at
> android.view.ViewRoot.ensureTouchModeLocally(ViewRoot.java:1736)
> E/AndroidRuntime(32224):        at android.view.ViewRoot.performTraversals
> (ViewRoot.java:667)
> E/AndroidRuntime(32224):        at android.view.ViewRoot.handleMessage
> (ViewRoot.java:1482)
> E/AndroidRuntime(32224):        at android.os.Handler.dispatchMessage
> (Handler.java:99)
> E/AndroidRuntime(32224):        at android.os.Looper.loop(Looper.java:123)
> E/AndroidRuntime(32224):        at android.app.ActivityThread.main
> (ActivityThread.java:3948)
> E/AndroidRuntime(32224):        at java.lang.reflect.Method.invokeNative
> (Native Method)
> E/AndroidRuntime(32224):        at java.lang.reflect.Method.invoke
> (Method.java:521)
> E/AndroidRuntime(32224):        at com.android.internal.os.ZygoteInit
> $MethodAndArgsCaller.run(ZygoteInit.java:782)
> E/AndroidRuntime(32224):        at com.android.internal.os.ZygoteInit.main
> (ZygoteInit.java:540)
> E/AndroidRuntime(32224):        at dalvik.system.NativeStart.main(Native
> Method)
>
> Has anyone met this kind of issue? Thanks for sharing your experience.

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