5

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，并且从该屏幕我正在使用同一选项卡中导航另一个屏幕。但是当我单击同一选项卡时要返回上一个屏幕，我已经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

我提到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。

4

1 回答 1

7

注册 BroadcastReceiveronResume()和注销onPause()将解决这个问题。如果需要，您也可以使用onStart()/ onStop()。

于 2013-08-19T05:32:59.747 回答