bt.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View p1)
            {
                try{
                    List<Integer> dataList = new ArrayList<Integer>();
                    int start = 5;
                    int end = 15;
                    for (int i = start; i <= end; i++){
                        dataList.add(i);
                    }
                    Collections.shuffle(dataList);
                    int[] num = new int[dataList.size()];
                    for (int i = 0; i < dataList.size(); i++) {
                        num[i] = dataList.get(i);
                    }

                    for (int i = 0; i < num.length; i++) {


                    t.setText(num[i]);
                    }
                }catch (Exception e) {
                    e.printStackTrace();
                }
            }});

我想告诉我的文本视图的随机数，但它没有显示或崩溃不捕获异常

I want to show my random number on text view but it shown nothing or crash without catch Exception

我应该怎么办？

什么，在哪里是我的错误？

What and where is my error?

推荐答案

您应该能够使用钻石操作符＆LT;＆GT; 。你只能显示一个字符串的时间，所以先做个字符串（你不需要复制到一个数组第一个）。喜欢的东西，

You should be able to use the diamond operator <>. You can only display one String at a time, so first make a String (and you don't need to copy to an array first). Something like,

try {
    List<Integer> dataList = new ArrayList<>(); // <-- <Integer> if you can't.
    int start = 5;
    int end = 15;
    for (int i = start; i <= end; i++) {
        dataList.add(i);
    }
    Collections.shuffle(dataList);
    t.setText(dataList.toString());
} catch (Exception e) {
    e.printStackTrace();
}