设置横屏全屏

方法一、在AndroidManifest.xml中定义：

        <activity android:name=".XingHuaMajiang"
                  android:label="@string/app_name"
                  android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
                  android:screenOrientation="landscape">

方法二、在onCreate函数中定义：

requestWindowFeature( Window.FEATURE_NO_TITLE );
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                     WindowManager.LayoutParams.FLAG_FULLSCREEN);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);