Android display metrics in DP and pixels

AndroidDisplayMetrics

DisplayMetrics displayMetrics = context.getResources().getDisplayMetrics();    
float dpHeight = displayMetrics.heightPixels / displayMetrics.density;
float dpWidth = displayMetrics.widthPixels / displayMetrics.density;

// variant, API 17+
Display display = context.getWindowManager().getDefaultDisplay();
DisplayMetrics realMetrics = new DisplayMetrics();
display.getRealMetrics(realMetrics);
float realWidth = realMetrics.widthPixels / realMetrics.density;
float realHeight = realMetrics.heightPixels / realMetrics.density;