IllegalStateException：在 FragmentActivity 类中的 onSaveInstanceState 之后无法执行此操作

Question

这是我编写的代码。我无法找到此功能何时崩溃，但有时它可以工作。

public class ListFragmentActivity extends FragmentActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
  main();
  IntentFilter filter1 = new IntentFilter("com.venkat.listfragment");
  registerReceiver(myReceiver, filter1);
  // register reciever intent filter.

}
public void main(){
    IntentFilter filter1 = new IntentFilter("com.venkat.listfragment");
    registerReceiver(myReceiver, filter1);
     List_Fragment ls_fragment = new List_Fragment();
     getSupportFragmentManager().popBackStack(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);
     getSupportFragmentManager().beginTransaction()
     .replace(android.R.id.content, ls_fragment).addToBackStack(null).commitAllowingStateLoss();
}

@Override
protected void onSaveInstanceState(Bundle outState) {
}
private BroadcastReceiver myReceiver = new BroadcastReceiver()
{
    @Override
    public void onReceive(Context context, Intent intent) {
        main();

    }
};}

我有四个选项卡，当我单击一个选项卡时，它会显示相应的屏幕，并且从该屏幕我在同一个选项卡中导航另一个屏幕。但是当我单击同一个选项卡时返回到上一个屏幕我有为此编写了一个广播接收器。

我收到此错误：

08-19 10:13:51.436: E/AndroidRuntime(2830): FATAL EXCEPTION: main
08-19 10:13:51.436: E/AndroidRuntime(2830): java.lang.RuntimeException: Error receiving broadcast Intent { act=com.venkat.listfragment } in com.iheartsalesevent.main.ListFragmentActivity$1@44a89218
08-19 10:13:51.436: E/AndroidRuntime(2830):     at android.app.ActivityThread$PackageInfo$ReceiverDispatcher$Args.run(ActivityThread.java:905)
08-19 10:13:51.436: E/AndroidRuntime(2830):     at android.os.Handler.handleCallback(Handler.java:587)
08-19 10:13:51.436: E/AndroidRuntime(2830):     at android.os.Handler.dispatchMessage(Handler.java:92)
08-19 10:13:51.436: E/AndroidRuntime(2830):     at android.os.Looper.loop(Looper.java:123)
08-19 10:13:51.436: E/AndroidRuntime(2830):     at android.app.ActivityThread.main(ActivityThread.java:4627)
08-19 10:13:51.436: E/AndroidRuntime(2830):     at java.lang.reflect.Method.invokeNative(Native Method)
08-19 10:13:51.436: E/AndroidRuntime(2830):     at java.lang.reflect.Method.invoke(Method.java:521)
08-19 10:13:51.436: E/AndroidRuntime(2830):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
08-19 10:13:51.436: E/AndroidRuntime(2830):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
08-19 10:13:51.436: E/AndroidRuntime(2830):     at dalvik.system.NativeStart.main(Native Method)
08-19 10:13:51.436: E/AndroidRuntime(2830): Caused by: java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
08-19 10:13:51.436: E/AndroidRuntime(2830):     at android.support.v4.app.FragmentManagerImpl.checkStateLoss(FragmentManager.java:1343)
08-19 10:13:51.436: E/AndroidRuntime(2830):     at android.support.v4.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1354)
08-19 10:13:51.436: E/AndroidRuntime(2830):     at android.support.v4.app.FragmentManagerImpl.popBackStack(FragmentManager.java:493)
08-19 10:13:51.436: E/AndroidRuntime(2830):     at com.venkat.main.ListFragmentActivity.main(ListFragmentActivity.java:65)
08-19 10:13:51.436: E/AndroidRuntime(2830):     at com.venkat.main.ListFragmentActivity$1.onReceive(ListFragmentActivity.java:89)
08-19 10:13:51.436: E/AndroidRuntime(2830):     at android.app.ActivityThread$PackageInfo$ReceiverDispatcher$Args.run(ActivityThread.java:892)
08-19 10:13:51.436: E/AndroidRuntime(2830):     ... 9 more

我参考了很多与此问题相关的链接，但这些链接并不能解决我的问题。

Answer 1

在onResume() 中注册BroadcastReceiver 并在onPause() 中取消注册将解决此问题。如果需要，您也可以使用onStart() / onStop()。