Androidでフルスクリーン表示

Activityを継承したクラスのOnCreate()上で以下

getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);

こんな感じ

public class CameraEx extends Activity {
    @Override
    public void onCreate(Bundle bundle) {
        super.onCreate(bundle);

        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);

        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(new CameraView(this));
    }
}