反转阵列和设置按钮

Question

我想设置值的数组按钮。但我想设置按钮和数组的倒序。如果是数组setDay [100]和31数字按钮，设置值setday 100-1和按钮31-1。

打印出来

 
Blockquote 

btn1 btn2 btn3 btn4 btn5 ....btn28 btn29 btn30 btn31 

    69 70 71 72 73 .... 97 98  99 100 

int[] btnRes = {R.id.btn01, R.id.btn02, R.id.btn03, R.id.btn04, R.id.btn05, R.id.btn06, R.id.btn07, R.id.btn09,R.id.btn10, R.id.btn11, R.id.btn12, R.id.btn13, R.id.btn14, R.id.btn15, R.id.btn16, R.id.btn18,R.id.btn19, R.id.btn20, R.id.btn21, R.id.btn22, R.id.btn23, R.id.btn24, R.id.btn25, R.id.btn26,R.id.btn27,R.id.btn28,R.id.btn29,R.id.btn30}; 



/////// init buttons 
     Button[] btnPrev = new Button[btnRes.length]; 

     for (int i = 0; i < btnPrev.length; ++i) { 
      btnPrev[i] = (Button) findViewById(btnRes[i]); 

     } 

////// set value buttons to all buttons 
     for (int i = 0; i < btnPrev.length; ++i) { 

      btnPrev[i].setText(String.valueOf(setDay[i])); 

     } 

Answer 1

试试这个：

int maxDays = 100; 
int buttonsNbr = btnPrev.length; 

for (int i = buttonsNbr; i > 0; i--) { 

    btnPrev[buttonsNbr - i].setText(String.valueOf(setDay[ maxDays - i])); 

}