android - Tablet devices loading wrong orientation -

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my app uses 1 page main activity , in manifest set not allow rotation hence orientation stays same wether or not rotate device. on tablets when user in landscape orientation , runs app. app loads default orientation (portrait) in landscape view instead , im seeing half screen. help. part of activity in manifest use nosensor disable rotation.

<activity         android:name="com.paul.xicon.mainactivity"         android:windowsoftinputmode="adjustpan"         android:label="@string/app_name"         android:screenorientation="nosensor">

i'm not sure how disabling screen rotation. should work fine in activity tag of manifest.

android:screenorientation="landscape" (disables screen-rotation & restricts landscape mode)  or,  android:screenorientation="portrait" (disables screen-rotation & restricts portrait mode)

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