Question : Do you know how to make fullscreen in Android application?

Answer : It's very simple and only one line code to fulfill your desire. You need to add following line in your java file after "requestWindowFeature" line. But don't forget to assign "Window.FEATURE_NO_TITLE" in "requestWindowFeature" just like "requestWindowFeature(Window.FEATURE_NO_TITLE);"

view plain print about
1getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);