android - Activity Lifecycle mismatch when turning off the display -

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to solve problems regarding app pause/resume, tested activity lifecycle following simple app: 

public class mainactivity extends activity {     @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.content_main);         log.w("xxx", "create");     }      @override     public void onstart(){         super.onstart();         log.w("xxx","start");     }      @override     public void onresume(){         super.onresume();         log.w("xxx","resume");     }      @override     public void onpause(){         super.onpause();         log.w("xxx","pause");     }      @override     public void ondestroy(){         super.ondestroy();         log.w("xxx","destroy");     }      @override     public void onstop(){         super.onstop();         log.w("xxx","stop");     }      @override     public void onrestart(){         super.onrestart();         log.w("xxx","restart");     } }

with simple layout containing textview.

i installed app , ran it: 

01-28 11:56:09.032 2517-2517/android.se.behy.test w/xxx: create 01-28 11:56:09.035 2517-2517/android.se.behy.test w/xxx: start 01-28 11:56:09.035 2517-2517/android.se.behy.test w/xxx: resume

and turned display off (by pushing on/off button) , surprisingly saw following log: 

01-28 11:56:09.032 2517-2517/android.se.behy.test w/xxx: create 01-28 11:56:09.035 2517-2517/android.se.behy.test w/xxx: start 01-28 11:56:09.035 2517-2517/android.se.behy.test w/xxx: resume  01-28 11:56:20.750 2517-2517/android.se.behy.test w/xxx: pause 01-28 11:56:20.753 2517-2517/android.se.behy.test w/xxx: stop 01-28 11:56:20.809 2517-2517/android.se.behy.test w/xxx: destroy 01-28 11:56:20.843 2517-2517/android.se.behy.test w/xxx: create 01-28 11:56:20.844 2517-2517/android.se.behy.test w/xxx: start 01-28 11:56:20.844 2517-2517/android.se.behy.test w/xxx: resume 01-28 11:56:20.857 2517-2517/android.se.behy.test w/xxx: pause

question

normally expected pause app when turn display off, why stop, destroy, create, start, resume , pause after it?

i think orientation changes when turning display off. phones display screenlock in portrait mode. before locking screen, rotates orientation, , configuration change applied app, gets recreated because of this.

try doing same when app in portrait mode, should work expected.

to avoid recreating activity on configuration change, have @ android:configchanges.


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