android获得屏幕的宽度和高度

参考自牛客网：​​https://www.nowcoder.com/test/question/done?tid=21050533&qid=49668#summary​​

1、通过WindowManager获取

DisplayMetrics dm = new DisplayMetrics();

heigth = dm.heightPixels;

width = dm.widthPixels;

2、通过Resources获取

DisplayMetrics dm = getResources().getDisplayMetrics();

heigth = dm.heightPixels;

width = dm.widthPixels;