button的大小修改及随机数的使用

1. 根据不同的形式修改button需要重写

protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 
      int w = <calculation> 
      int h = <calculation> 
      setMeasuredDimension(w, h); 
   } 
2.

这里的随机数不仅仅是数字还可能是别的

final String alphabet = "0123456789ABCDE"; 
    final int N = alphabet.length(); 
 
    Random r = new Random(); 
 
    for (int i = 0; i < 50; i++) { 
        System.out.print(alphabet.charAt(r.nextInt(N))); 
    }