無法在super.onBackPressed（）後的onSaveInstanceState執行此操作

當用戶按壓背部退出應用程序，我展示插頁式廣告：無法在super.onBackPressed（）後的onSaveInstanceState執行此操作

mInterstitialAd.setAdListener(new AdListener() { 
    @Override 
    public void onAdClosed() { 
     onBackPressed(); //line 98 
    } 
}); 

requestNewInterstitial(); 

private void requestNewInterstitial() { 
    AdRequest adRequest = new AdRequest.Builder().build(); 
    mInterstitialAd.loadAd(adRequest); 
} 

@Override 
public void onBackPressed() { 
    if (mInterstitialAd.isLoaded()) { 
     mInterstitialAd.show(); 
    } else { 
     super.onBackPressed(); //line 410 
    } 
}

這是我從我的用戶收到的崩潰報告：

java.lang.RuntimeException: Unable to pause activity {com.myapp/com.google.android.gms.ads.AdActivity}: java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState 
at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3088) 
at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3043) 
at android.app.ActivityThread.handlePauseActivity(ActivityThread.java:3021) 
at android.app.ActivityThread.access$1000(ActivityThread.java:138) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1253) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:149) 
at android.app.ActivityThread.main(ActivityThread.java:5045) 
at java.lang.reflect.Method.invokeNative(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:515) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:794) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:610) 
at dalvik.system.NativeStart.main(Native Method) 
Caused by: java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState 
at android.app.FragmentManagerImpl.checkStateLoss(FragmentManager.java:1323) 
at android.app.FragmentManagerImpl.popBackStackImmediate(FragmentManager.java:493) 
at android.app.Activity.onBackPressed(Activity.java:2215) 
at com.myapp.MainActivity.onBackPressed(MainActivity.java:410) 
at com.myapp.MainActivity$1.onAdClosed(MainActivity.java:98) 
at com.google.android.gms.ads.internal.client.zzc.onAdClosed(Unknown Source) 
at com.google.android.gms.ads.internal.client.zzm$zza.onTransact(Unknown Source) 
at android.os.Binder.transact(Binder.java:361) 
at com.google.android.gms.ads.internal.client.l.a(SourceFile:109) 
at com.google.android.gms.ads.internal.a.n(SourceFile:645) 
at com.google.android.gms.ads.internal.b.t(SourceFile:351) 
at com.google.android.gms.ads.internal.t.t(SourceFile:141) 
at com.google.android.gms.ads.internal.overlay.ab.n(SourceFile:672) 
at com.google.android.gms.ads.internal.overlay.ab.i(SourceFile:408) 
at com.google.android.gms.ads.internal.overlay.a.d.onTransact(SourceFile:86) 
at android.os.Binder.transact(Binder.java:361) 
at com.google.android.gms.internal.zzdj$zza$zza.onPause(Unknown Source) 
at com.google.android.gms.ads.AdActivity.onPause(Unknown Source) 
at android.app.Activity.performPause(Activity.java:5335) 
at android.app.Instrumentation.callActivityOnPause(Instrumentation.java:1233) 
at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3074)

我明白，當用戶關閉廣告被觸發，但爲什麼它super.onBackPressed()死？

來源

2015-09-03 erdomester

您是否得到了該問題的解決方案？我跑到類似的問題。 – Manisha

您可以看到顯示錯誤是由FragmentManagerImpl.popBackStackImmediate引起的堆棧跟蹤。

這與onActivityResult類似，似乎當您顯示插頁式廣告時，您的活動已暫停，並且當onAdClosed()時，您的應用尚未恢復。

要解決該問題，您可以嘗試在onAdClosed()中設置一個標誌，如果該標誌打開，則在onResume()中調用onBackPressed()。

來源

2015-09-04 05:32:37

當您的活動暫停時，不能撥打onBackPressed()。然而，背印的行爲是離開活動。請致電finish()而不是onBackPressed()。

您應該確保在onBackPressed()的覆蓋範圍內該活動即將完成。返回可能因其他原因而被按下。

來源

2015-09-04 05:39:49

但是，爲何Android會在活動暫停時調用onBackPressed？我的意思是，我沒有自己調用這個方法，所以當用戶點擊後退按鈕時必須調用它。 –

無法在super.onBackPressed（）後的onSaveInstanceState執行此操作

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