While writing an app that uses Fragments and tabs on the Action Bar I
ran into a crash. I went back to the API Demos sample and can make the
same crash happen there. Start the program in the emulator and select
App > Action Bar > Action Bar Tabs. Click "Toggle tab mode" then "Add
new tab" twice, then click back and forth between the two tabs very
quickly until it crashes. Here's the traceback:
05-19 18:16:06.668: ERROR/AndroidRuntime(1153): FATAL EXCEPTION: main
05-19 18:16:06.668: ERROR/AndroidRuntime(1153):
java.lang.IllegalStateException: Fragment not added:
TabContentFragment{407c55a8 #0 id=0x7f08000c Tab 1}
05-19 18:16:06.668: ERROR/AndroidRuntime(1153): at
android.app.BackStackRecord.remove(BackStackRecord.java:366)
05-19 18:16:06.668: ERROR/AndroidRuntime(1153): at
com.example.android.apis.app.ActionBarTabs
$TabListener.onTabUnselected(ActionBarTabs.java:94)
05-19 18:16:06.668: ERROR/AndroidRuntime(1153): at
com.android.internal.app.ActionBarImpl.selectTab(ActionBarImpl.java:
476)
05-19 18:16:06.668: ERROR/AndroidRuntime(1153): at
com.android.internal.app.ActionBarImpl
$TabImpl.select(ActionBarImpl.java:816)
05-19 18:16:06.668: ERROR/AndroidRuntime(1153): at
com.android.internal.widget.ActionBarView
$TabClickListener.onClick(ActionBarView.java:954)
05-19 18:16:06.668: ERROR/AndroidRuntime(1153): at
android.view.View.performClick(View.java:3110)
05-19 18:16:06.668: ERROR/AndroidRuntime(1153): at
android.view.View$PerformClick.run(View.java:11928)
05-19 18:16:06.668: ERROR/AndroidRuntime(1153): at
android.os.Handler.handleCallback(Handler.java:587)
05-19 18:16:06.668: ERROR/AndroidRuntime(1153): at
android.os.Handler.dispatchMessage(Handler.java:92)
05-19 18:16:06.668: ERROR/AndroidRuntime(1153): at
android.os.Looper.loop(Looper.java:132)
05-19 18:16:06.668: ERROR/AndroidRuntime(1153): at
android.app.ActivityThread.main(ActivityThread.java:4025)
05-19 18:16:06.668: ERROR/AndroidRuntime(1153): at
java.lang.reflect.Method.invokeNative(Native Method)
05-19 18:16:06.668: ERROR/AndroidRuntime(1153): at
java.lang.reflect.Method.invoke(Method.java:491)
05-19 18:16:06.668: ERROR/AndroidRuntime(1153): at
com.android.internal.os.ZygoteInit
$MethodAndArgsCaller.run(ZygoteInit.java:841)
05-19 18:16:06.668: ERROR/AndroidRuntime(1153): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
05-19 18:16:06.668: ERROR/AndroidRuntime(1153): at
dalvik.system.NativeStart.main(Native Method)
05-19 18:16:06.698: WARN/ActivityManager(82): Force finishing
activity com.example.android.apis/.app.ActionBarTabs
Is this a known problem? I tried it under SDK Platform 3.0 (rev 1) and
3.1 (rev 2).
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