getScreenInches

private int getScreenInches(Context context) {
          WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
          Display display = wm.getDefaultDisplay();
          DisplayMetrics displayMetrics = new DisplayMetrics();
          display.getMetrics(displayMetrics);
          int widthPixels = displayMetrics.widthPixels;
          int heightPixels = displayMetrics.heightPixels;
          
          float widthDpi = displayMetrics.xdpi;
          float heightDpi = displayMetrics.ydpi;
          
          
          float widthInches = widthPixels / widthDpi;
          float heightInches = heightPixels / heightDpi;
          
          double diagonalInches = Math.sqrt((widthInches * widthInches) + (heightInches * heightInches));
          
          return (int) Math.round(diagonalInches);
}