DisplayMetrics mDisplayMetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(mDisplayMetrics);
int W = mDisplayMetrics.widthPixels;
int H = mDisplayMetrics.heightPixels;
Log.i("Main", "Width = " + W);
Log.i("Main", "Height = " + H);
原文：http://www.cnblogs.com/fengchuxiaodai/p/5568243.html