Android ShowDialog:IllegalStateException:在onSaveInstanceState之后无法执行此操作

Question

在runOnUiThread()一个Activity中,我正在尝试显示ProgressDialog.

 FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
 ProgressDialogFragment mProgressDialogFragment = new ProgressDialogFragment();
 mProgressDialogFragment.show(fragmentTransaction, TAG);

这里ProgressDialogFragment延伸DialogFragment.我已经在许多设备上测试了这个并没有发生任何崩溃.但是在Asus中,每当我显示对话框时,我都会经常遇到下面的崩溃.华硕的操作系统版本是4.4.2.

java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
       at android.support.v4.app.FragmentManagerImpl.checkStateLoss(FragmentManager.java:1360)
       at android.support.v4.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1378)
       at android.support.v4.app.BackStackRecord.commitInternal(BackStackRecord.java:595)
       at android.support.v4.app.BackStackRecord.commit(BackStackRecord.java:574)
       at android.support.v4.app.DialogFragment.show(DialogFragment.java:155)
       at com.trimble.android.trimbleone.activity.ProgressDialogHandlerActivity.showProgressDialog(ProgressDialogHandlerActivity.java:72)
       at com.trimble.android.trimbleone.activity.UICallbackHandlerActivity$processThread$7.run(UICallbackHandlerActivity.java:222)
       at android.os.Handler.handleCallback(Handler.java:733)
       at android.os.Handler.dispatchMessage(Handler.java:95)
       at android.os.Looper.loop(Looper.java:149)
       at android.app.ActivityThread.main(ActivityThread.java:5061)
       at java.lang.reflect.Method.invokeNative(Method.java)
       at java.lang.reflect.Method.invoke(Method.java:515)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:788)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:604)
       at dalvik.system.NativeStart.main(NativeStart.java)

Answer 1

@Override
protected void onSaveInstanceState(Bundle outState) {
    //No call for super(). Bug on API Level > 11.
}

不要super()对saveInstanceState方法进行调用.这搞砸了......

经过一些研究,这是支持包中的一个已知错误.

如果您需要保存实例,并向您添加内容,outState Bundle可以使用以下内容:

@Override
protected void onSaveInstanceState(Bundle outState) {
    outState.putString("WORKAROUND_FOR_BUG_19917_KEY", "WORKAROUND_FOR_BUG_19917_VALUE");
    super.onSaveInstanceState(outState);
}

最后,正确的解决方案(如评论中所示)使用:

transaction.commitAllowingStateLoss();

添加或执行FragmentTransaction导致的时间Exception.

上面的解决方案正在解决我早期的support.v4库中的问题.但是,如果你仍然有这方面的问题,你还必须阅读@AlexLockwood的博客:片段交易和活动状态损失

博客文章摘要(但我强烈建议您阅读):

NEVER commit()后交易onPause()的预蜂窝,并onStop()在蜂窝状后提交内部交易时要小心,Activity生命周期方法.使用onCreate(),onResumeFragments()并onPostResume() 避免执行交易内异步回调方法使用commitAllowingStateLoss()只有在万不得已的
更新:用于显示DialogFragment使用stateLoss使用以下行.

DialogFragment loadingDialog = createDialog();
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
                    transaction.add(loadingDialog, "loading");
                    transaction.commitAllowingStateLoss();