android 获取屏幕尺寸

在内部类中使用：

 //获取屏幕的宽度旧方法，已废弃
 WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
 int screenWidth = wm.getDefaultDisplay().getWidth();
 System.out.println("screenWidth:" + screenWidth);
 
 
//获取屏幕的宽高新方法1
 Point size = new Point();
 wm.getDefaultDisplay().getSize(size);
 int screenWidth1 = size.x;
 int screenHeight = size.y;
 System.out.println("screenWidth1:" + screenWidth1);
 
 
//获取屏幕的宽高新方法2
 DisplayMetrics displaymetrics = new DisplayMetrics();
 wm.getDefaultDisplay().getMetrics(displaymetrics);
 int screenWidth2 = displaymetrics.widthPixels;
 int screenHeight2 = displaymetrics.heightPixels;
 System.out.println("screenWidth2:" + screenWidth2);
 

在activity里使用：

 //方法1
 DisplayMetrics dm = new
 DisplayMetrics();getWindowManager().getDefaultDisplay().getMetrics(dm);
 int width = dm.widthPixels;
 int height = dm.heightPixels;
 
 
//方法2
 Point size = new Point();
 getWindowManager().getDefaultDisplay().getSize(size);
 int screenWidth = size.x;
 int screenHeight = size.y;
 

理解Android Context 上下文 你必须知道的一切