android获取屏幕的高度和宽度用到WindowManager这个类,两种方法: 

1、WindowManager wm = (WindowManager) getContext()

                    .getSystemService(Context.WINDOW_SERVICE);
 int width = wm.getDefaultDisplay().getWidth();
     int height = wm.getDefaultDisplay().getHeight();
2、WindowManager wm = this.getWindowManager();
 
     int width = wm.getDefaultDisplay().getWidth();
     int height = wm.getDefaultDisplay().getHeight();