android - Locking orientation to portrait force close in my phone -


i want app lock portrait mode. used code : 

<activity android:name="myactivity"                   android:label="@string/app_name" android:screenorientation="portrait"                   android:configchanges="orientation|keyboardhidden"                   >

and in myactivity class : 

public void onconfigurationchanged(configuration newconfig)     {         super.onconfigurationchanged(newconfig);         setrequestedorientation(activityinfo.screen_orientation_portrait);     }

this code work correctly in emulator, when install , run in phone, app force closed. how can solve problem?

yo use in manifest there no need use pragmatically. remove onconfigurationchanged method code.


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