how keep screen in landscape mode after locking and unlocking the device? - android

I made a game with Adobe AIR and ActionScript 3 for Android devices.
My problem is with landscape mode. Everything is fine as long as the device get lock screen.
When you open the screen and return to the game, it has changed from landscape to portrait mode.
I fixed this with:
stage.addEventListener(Event.ACTIVATE,Activate);
into Activate function: stage.setAspectRatio(StageAspectRatio.LANDSCAPE);
into Activate function: stage.displayState = StageDisplayState.FULL_SCREEN;
portrait problem is fixed but FULL SCREEN is with android titlebar... How can I fix it?

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My app runs in landscape mode.
I have android:screenOrientation="landscape" set in AndroidManifest.xml file.
If the screen orientation of the device is locked to portrait mode, then my app still runs in landscape mode. But the gallery activity started from within the app runs in portrait mode.
Is there any way to force gallery activity to always run in landscape mode?
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Is it possible to set the orientation of the lock screen to landscape in Nexus 7?

I want the home screen and the lock screen to be in the landscape mode. I used this app and able to make the home screen to stay in landscape mode but the lock screen is still in the portrait mode. I would like to know how this app changing the orientation of the home screen and is it possible to change the orientation of lock screen to landscape without installing some other third party lock screen.
I am only looking for the solution that works on Nexus 7.
Google has released a new version for Nexus 7 Android 4.1.2 which supports both home screen and the lock screen in the landscape orientation. Please update your software..

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