class cast exception on orientation change (Android)

Question

I have an activity which is hosted by tab activity. When i change screen orientation my app crashes. ``` 02-14 21:01:35.825: E/AndroidRuntime(9424): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.testapp/com.example.testapp.MainActivity} java.lang.ClassCastException: android.view.AbsSavedState$1 cannot be cast to android.widget.AbsListView$SavedState 02-14 21:01:35.825: E/AndroidRuntime(9424): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2194) 02-14 21:01:35.825: E/AndroidRuntime(9424): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2229) 02-14 21:01:35.825: E/AndroidRuntime(9424): at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3791) 02-14 21:01:35.825: E/AndroidRuntime(9424): at android.app.ActivityThread.access$700(ActivityThread.java:139) 02-14 21:01:35.825: E/AndroidRuntime(9424): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1265) 02-14 21:01:35.825: E/…

Accepted Answer

Unfortunately i don't have enough reputation to post images.

XML files are not images, and layouts are XML files.

I found that if i remove listview from first tab or HorizontalListView from the second, i can change orientation without any problem

That, plus your symptoms, suggests that you named those two widgets with the same `android:id` value. That will not work, as their saved states are not the same. Either make them be both the same class, or name them something different.

class cast exception on orientation change (Android)

Solution

Problem