How to get screen width and height of device ?

If you want to get screen width and height of device in java file you can use DisplayMetrics class . This is a very simple way to get screen size. By using this code you can get size in pixels.

 DisplayMetrics displaymetrics = new DisplayMetrics();
 getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
 int height = displaymetrics.heightPixels;
 int width = displaymetrics.widthPixels;

In a view you need to do something like this:

((Activity) getContext()).getWindowManager()
                         .getDefaultDisplay()
                         .getMetrics(displayMetrics);