Android全屏、横屏

import android.app.Activity;import android.view.WindowManager;import android.view.Window;public class DemoActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);requestWindowFeature(Window.FEATURE_NO_TITLE);  getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,  WindowManager.LayoutParams.FLAG_FULLSCREEN);         setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);        //mGLView = new DemoGLSurfaceView(this);        //setContentView(mGLView);    }    @Override    protected void onPause() {            }    @Override    protected void onResume() {            }    @Override    public void onDestroy()    {            }}