android中动态获取屏幕的像素

public static int getDisplayMetrics(Context context){

DisplayMetrics metrics=new DisplayMetrics();

((Activity)context).getWindowManager().getDefaultDisplay().getMetrics(metrics);

return metrics.heightPixels;

}

DisplayMetrics metrics=new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
int heightPixels = metrics.heightPixels;
int widthPixels = metrics.widthPixels;