java - 如何从字符串数组列表中随机选择

Question

我有一个字符串数组列表:

<string-array name="chapter_1">
      <item>......</item>
      .           
      .
      .
      .
</string-array>

<string-array name="chapter_2">
      <item>......</item>
      .           
      .
      .
      .
</string-array>

等等。我有一个随机整数 chapter_no。

我有一个字符串:

String chapter_name = "chapter_" + chapter_no;

现在，我想访问与 chapter_no 对应的字符串数组。

我知道我不能这样做:

String[] chapter = getResources().getStringArray(R.array.chapter_name);

如何随机访问字符串数组？请帮助我。

Answer 1

从 chapter_array 获取随机字符串 ..

String[] chapter = getResources().getStringArray(R.array.chapter_name);

String randomString = chapter[new Random(chapter.length).nextInt()];

[更新]

        String[] data;

        //first of all give all resources to arrays
        int[] arrays = {R.string.chapter_1, R.string.chapter_2};

        //then we are fetching any one string array resources randomly
        int chapter_no = arrays[new Random(arrays.length).nextInt()];

        //From above we got any one random resource string..So we fetch all string items from that resource into data array
        data = getResources().getStringArray(chapter_no);

        //Now from that data array we fetch any one random string.
        String randomString = data[new Random(data.length).nextInt()];

[更新]

    String[] data;
    int[] arrays = {R.array.chapter_1, R.array.chapter_2};
    int chapter_no = arrays[new Random().nextInt(arrays.length-1)];
    data = getResources().getStringArray(chapter_no);
    String randomString = data[new Random().nextInt(data.length-1)];
    Toast.makeText(this, randomString, Toast.LENGTH_SHORT).show();