full screen Videoview Android Studio

here is your code for full screen

DisplayMetrics metrics = new DisplayMetrics(); getWindowManager().getDefaultDisplay().getMetrics(metrics);
             android.widget.LinearLayout.LayoutParams params = (android.widget.LinearLayout.LayoutParams) videoView.getLayoutParams();
             params.width =  metrics.widthPixels;
             params.height = metrics.heightPixels;
             params.leftMargin = 0;
             videoView.setLayoutParams(params);

here is your code for back original size. which your set

DisplayMetrics metrics = new DisplayMetrics(); getWindowManager().getDefaultDisplay().getMetrics(metrics);
             android.widget.LinearLayout.LayoutParams params = (android.widget.LinearLayout.LayoutParams) videoView.getLayoutParams();
             params.width =  (int) (300*metrics.density);
             params.height = (int) (250*metrics.density);
             params.leftMargin = 30;
             videoView.setLayoutParams(params);

you can use methode fi else or for or boolean
whichever you like..

enjoy for code