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POandroid: application crash when i hit back button (activitygroup + TabWidget)
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copied!<p>every one!</p> <p>One year ago, I have developed an application with the combination "ActivityGroup + TabWidget", it works well on android os 2.3+. But I tested it on os 4.0, and I found it crash sometimes. - If I open application, I do nothing, and i hit "back", it works well. - If I open application, navigate in the application (click on list item, see detail item then go back), and then when I am back to the "root" page of a tab, i click "back", it crash. (It should close the application normally) --------in this case, the activitygroup start new activity and recieve the back keyevent - If I open application, navigate in the application like above, but juste see the views not started by activitygroup, but by the root activity in the group. Il works well. </p> <p>There are some code in my ActivityGroup</p> <pre><code>public void startActivity(Intent intent) { // Start the root activity withing the group and get its view View view = getLocalActivityManager().startActivity(id, intent) .getDecorView(); // Replace the view of this ActivityGroup replaceView(view); } public void back() { if(history.size() > 1) { //history = new ArrayList<View>(); global variable history.remove(history.size()-1); setContentView(history.get(history.size()-1)); mIds.pop(); }else { finish(); // I tried to commment it too, but no lucks } } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK) { back(); return true; } return super.onKeyDown(keyCode, event); } </code></pre> <p>And there's the error stack:</p> <pre><code>05-18 18:47:47.687: E/AndroidRuntime(6828): FATAL EXCEPTION: main 05-18 18:47:47.687: E/AndroidRuntime(6828): java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState 05-18 18:47:47.687: E/AndroidRuntime(6828): at android.app.FragmentManagerImpl.checkStateLoss(FragmentManager.java:1213) 05-18 18:47:47.687: E/AndroidRuntime(6828): at android.app.FragmentManagerImpl.popBackStackImmediate(FragmentManager.java:442) 05-18 18:47:47.687: E/AndroidRuntime(6828): at android.app.Activity.onBackPressed(Activity.java:2121) 05-18 18:47:47.687: E/AndroidRuntime(6828): at android.app.Activity.onKeyUp(Activity.java:2099) 05-18 18:47:47.687: E/AndroidRuntime(6828): at android.view.KeyEvent.dispatch(KeyEvent.java:2557) 05-18 18:47:47.687: E/AndroidRuntime(6828): at android.app.Activity.dispatchKeyEvent(Activity.java:2329) 05-18 18:47:47.687: E/AndroidRuntime(6828): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1806) 05-18 18:47:47.687: E/AndroidRuntime(6828): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1248) 05-18 18:47:47.687: E/AndroidRuntime(6828): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1248) 05-18 18:47:47.687: E/AndroidRuntime(6828): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1248) 05-18 18:47:47.687: E/AndroidRuntime(6828): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchKeyEvent(PhoneWindow.java:1859) 05-18 18:47:47.687: E/AndroidRuntime(6828): at com.android.internal.policy.impl.PhoneWindow.superDispatchKeyEvent(PhoneWindow.java:1361) 05-18 18:47:47.687: E/AndroidRuntime(6828): at android.app.Activity.dispatchKeyEvent(Activity.java:2324) 05-18 18:47:47.687: E/AndroidRuntime(6828): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1806) 05-18 18:47:47.687: E/AndroidRuntime(6828): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1248) 05-18 18:47:47.687: E/AndroidRuntime(6828): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1248) 05-18 18:47:47.687: E/AndroidRuntime(6828): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1248) 05-18 18:47:47.687: E/AndroidRuntime(6828): at android.widget.TabHost.dispatchKeyEvent(TabHost.java:298) 05-18 18:47:47.687: E/AndroidRuntime(6828): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1248) 05-18 18:47:47.687: E/AndroidRuntime(6828): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1248) 05-18 18:47:47.687: E/AndroidRuntime(6828): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1248) 05-18 18:47:47.687: E/AndroidRuntime(6828): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchKeyEvent(PhoneWindow.java:1859) 05-18 18:47:47.687: E/AndroidRuntime(6828): at com.android.internal.policy.impl.PhoneWindow.superDispatchKeyEvent(PhoneWindow.java:1361) 05-18 18:47:47.687: E/AndroidRuntime(6828): at android.app.Activity.dispatchKeyEvent(Activity.java:2324) 05-18 18:47:47.687: E/AndroidRuntime(6828): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1806) 05-18 18:47:47.687: E/AndroidRuntime(6828): at android.view.ViewRootImpl.deliverKeyEventPostIme(ViewRootImpl.java:3300) 05-18 18:47:47.687: E/AndroidRuntime(6828): at android.view.ViewRootImpl.handleFinishedEvent(ViewRootImpl.java:3273) 05-18 18:47:47.687: E/AndroidRuntime(6828): at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2436) 05-18 18:47:47.687: E/AndroidRuntime(6828): at android.os.Handler.dispatchMessage(Handler.java:99) 05-18 18:47:47.687: E/AndroidRuntime(6828): at android.os.Looper.loop(Looper.java:137) 05-18 18:47:47.687: E/AndroidRuntime(6828): at android.app.ActivityThread.main(ActivityThread.java:4340) 05-18 18:47:47.687: E/AndroidRuntime(6828): at java.lang.reflect.Method.invokeNative(Native Method) 05-18 18:47:47.687: E/AndroidRuntime(6828): at java.lang.reflect.Method.invoke(Method.java:511) 05-18 18:47:47.687: E/AndroidRuntime(6828): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 05-18 18:47:47.687: E/AndroidRuntime(6828): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 05-18 18:47:47.687: E/AndroidRuntime(6828): at dalvik.system.NativeStart.main(Native Method) </code></pre> <p>I didn't use Fragment, because it wasn't published by android sdk when i developped this application. </p> <p>Any ideas? Every idea will be appreciated!!<br> Thanks!</p>

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