是什么导致此异常?


  E / AndroidRuntime(16901):致命异常:主要
      E / AndroidRuntime(16901):进程:com.borqs.karbonn.music,PID:16901
      E / AndroidRuntime(16901):java.lang.IllegalStateException:在onSaveInstanceState之后无法执行此操作
      E / AndroidRuntime(16901):位于android.app.FragmentManagerImpl.checkStateLoss(FragmentManager.java:1323)
      E / AndroidRuntime(16901):位于android.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1341)
      E / AndroidRuntime(16901):位于android.app.BackStackRecord.commitInternal(BackStackRecord.java:609)
      E / AndroidRuntime(16901):位于android.app.BackStackRecord.commit(BackStackRecord.java:587)
      E / AndroidRuntime(16901):位于com.borqs.music.MusicHubMainActivity.onNavigationItemSelected(MusicHubMainActivity.java:1167)
      E / AndroidRuntime(16901):位于com.android.internal.widget.ActionBarView $ 1.onItemSelected(ActionBarView.java:148)
      E / AndroidRuntime(16901):位于android.widget.AdapterView.fireOnSelected(AdapterView.java:893)
      E / AndroidRuntime(16901):位于android.widget.AdapterView.access $ 200(AdapterView.java:48)
      E / AndroidRuntime(16901):位于android.widget.AdapterView $ SelectionNotifier.run(AdapterView.java:861)
      E / AndroidRuntime(16901):位于android.os.Handler.handleCallback(Handler.java:808)
      E / AndroidRuntime(16901):位于android.os.Handler.dispatchMessage(Handler.java:103)
      E / AndroidRuntime(16901):位于android.os.Looper.loop(Looper.java:193)
      E / AndroidRuntime(16901):位于android.app.ActivityThread.main(ActivityThread.java:5299)
      E / AndroidRuntime(16901):位于java.lang.reflect.Method.invokeNative(本机方法)
      E / AndroidRuntime(16901):位于java.lang.reflect.Method.invoke(Method.java:515)
      E / AndroidRuntime(16901):位于com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:825)
      E / AndroidRuntime(16901):位于com.android.internal.os.ZygoteInit.main(ZygoteInit.java:641)^ M
      E / AndroidRuntime(16901):位于dalvik.system.NativeStart.main(本机方法)


这是我的onSave实例代码

@Override
public void onSaveInstanceState(Bundle state)
{
    super.onSaveInstanceState(state);
    saveInstance =true;
    if (state == null)
    {
        FragmentManager mFragmentManager = getFragmentManager();
        FragmentTransaction fragmentTransaction = mFragmentManager.beginTransaction();
        MediaPlaybackFragment fragment = new MediaPlaybackFragment();
        fragmentTransaction.add(R.id.content_frame, fragment);
        fragmentTransaction.commit();
    } else {
        state.putInt("position", mPostion);
        selectedTab = tabHost.getCurrentTab();
        state.putInt("tabhostselected", selectedTab);
        state.putBoolean("isSaveInstance", saveInstance);
        // state.putBoolean("draweropened", mDrawergarment.isDrawerOpened());
    }
}


这是我的导航代码

@Override
public boolean onNavigationItemSelected(int position, long itemId) {
    Fragment newFragment = null;
    FragmentManager fragmentManager = getFragmentManager();
    FragmentTransaction ft = fragmentManager.beginTransaction();
    newFragment = new MediaPlaybackFragment();
    ft.replace(R.id.content_frame, newFragment, "Music");
    ft.commit();
}

Any help would be much appreciated, if you need more information please ask.

最佳答案

更改

fragmentTransaction.commit();




fragmentTransaction.commitAllowingStateLoss();


可能您在代码中的其他位置提交了事务-您也应该在那里使用commitAllowingStateLoss()。但是我建议您重写代码,以避免在onSaveInstanceState()之后提交

09-08 03:05