Android Studio 中获取屏幕宽度实例

Point p = new Point();
//获取窗口管理器
WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
wm.getDefaultDisplay().getSize(p);
screenWidth = p.x; // 屏幕宽度

   img.post(new Runnable() {
   @Override
   public void run() {
    int w = img.getWidth();
    int h = w / 2;
    img.setLayoutParams(new LinearLayout.LayoutParams(w, h));
   }

  });