make android activity full screen

 copy paste the following code in .java file for which you wanna make the activity full screen  no tiltle bar or action bar nothing


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