今天我在應用程序中發現了一個奇怪的行爲。片段的onActivityCreated()在Activity的onDestroy()後調用
它發生在我使用Eclipse的Devices視圖停止應用程序時。有人可以解釋嗎?
爲什麼onActivityCreated()
的Fragment
即使在Activity
已被銷燬時也會被調用? MyHomeActivity
包含兩個Fragment
s,併爲兩者生成類似的日誌。
在這裏,我粘貼日誌爲一個Fragment
。 NullPointerException
是次要問題。
我很驚訝爲什麼onActivityCreated()
被調用時調用堆棧從onDestroy()
MyHomeActivity
啓動?
03-05 12:31:21.414: W/System.err(5638): java.lang.NullPointerException
03-05 12:31:21.421: W/System.err(5638): at **MyListViewFrag.onActivityCreated**(BuddyListViewFrag.java:85)
03-05 12:31:21.421: W/System.err(5638): at android.support.v4.app.Fragment.performActivityCreated(Fragment.java:1468)
03-05 12:31:21.421: W/System.err(5638): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:931)
03-05 12:31:21.421: W/System.err(5638): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1088)
03-05 12:31:21.421: W/System.err(5638): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1070)
03-05 12:31:21.421: W/System.err(5638): at android.support.v4.app.FragmentManagerImpl.dispatchReallyStop(FragmentManager.java:1888)
03-05 12:31:21.421: W/System.err(5638): at android.support.v4.app.FragmentActivity.onReallyStop(FragmentActivity.java:787)
03-05 12:31:21.421: W/System.err(5638): at android.support.v4.app.FragmentActivity.doReallyStop(FragmentActivity.java:764)
03-05 12:31:21.421: W/System.err(5638): at android.support.v4.app.FragmentActivity.onDestroy(FragmentActivity.java:322)
03-05 12:31:21.421: W/System.err(5638): at MyFragmentActivity.onDestroy(RbrFragmentActivity.java:57)
03-05 12:31:21.421: W/System.err(5638): at **MyHomeActivity.onDestroy**(MyHomeActivity.java:254)
03-05 12:31:21.421: W/System.err(5638): at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:2663)
03-05 12:31:21.421: W/System.err(5638): at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:2694)
03-05 12:31:21.421: W/System.err(5638): at android.app.ActivityThread.access$2100(ActivityThread.java:117)
03-05 12:31:21.421: W/System.err(5638): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:968)
03-05 12:31:21.421: W/System.err(5638): at android.os.Handler.dispatchMessage(Handler.java:99)
03-05 12:31:21.421: W/System.err(5638): at android.os.Looper.loop(Looper.java:130)
03-05 12:31:21.421: W/System.err(5638): at android.app.ActivityThread.main(ActivityThread.java:3687)
03-05 12:31:21.429: W/System.err(5638): at java.lang.reflect.Method.invokeNative(Native Method)
03-05 12:31:21.429: W/System.err(5638): at java.lang.reflect.Method.invoke(Method.java:507)
03-05 12:31:21.429: W/System.err(5638): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
03-05 12:31:21.429: W/System.err(5638): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
03-05 12:31:21.429: W/System.err(5638): at dalvik.system.NativeStart.main(Native Method)
我使用支持庫提供Fragment
s到預蜂窩設備,如果讓任何區別。
你似乎重寫'onDestroy'回調。你在那做什麼? – Luksprog 2013-03-05 07:39:28
沒有什麼只是調用super.OnDestroy() – aProgrammer 2013-03-05 12:25:24
我只注意到我的4.2模擬器上的相同行爲。你有沒有找到更多信息? – 2013-04-08 18:41:16