随机数按钮

Question

如何在Android Studio中使用Java将随机数放入按钮？先谢谢你了。

我想把随机数放4x4按钮。

我尝试了这段代码，但它在按钮中显示了数组列表：

private LinearLayout container;

int[] ran={1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};

@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    container = findViewById(R.id.container);

    shuffleArray(ran);

    for (int i = 0; i < container.getChildCount(); i++) {
        LinearLayout row = (LinearLayout) container.getChildAt(i);
        for (int j = 0; j < row.getChildCount(); j++) {
            Button button = (Button) row.getChildAt(j);
            button.setOnClickListener(this);
            button.setText(Arrays.toString(ran));
            button.setTextSize(24);
        }
    }
}

Answer 1

    import java.util.*;
     class IntasString{
         public static void main(String args[]){
           int min=1,max=15,result;
           int myarr[]={1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
          int range=(max-min)+1;
          result=(int)(Math.random() * range) + min;
          String indexValue=String.valueOf(myarr[result]);
          System.out.println(indexValue);

         }
     }
Use this code according you and use variable indexValue to set text for Button