DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
nMultiple = dm.widthPixels;//宽
int height = dm.heightPixels//高
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
nMultiple = dm.widthPixels;//宽
int height = dm.heightPixels//高