如何在 android 中打乱数组的字母？

Question

String arrAnimal[] = {"cat","dog","parrot","fish"};

我需要打乱每个单词并将其设置为 TextView，当单击按钮想要遍历每个元素时（请参阅随机排列的元素）。

Answer 1

使用Collections.shuffle( )

ArrayList<String> list = new ArrayList<String>();
list.add("cat");
list.add("dog");
list.add("parrot");
list.add("fish");

Collections.shuffle(list);

Answer 2

完整的工作代码，

String[] animals = {"cat","dog","parrot","fish"};
for (int i = 0; i < animals.length; ++i) {
    List<Character> letters = new ArrayList<>(animals[i].length());
    for (char c : animals[i].toCharArray()) {
        letters.add(c);
    }
    Collections.shuffle(letters);
    StringBuilder builder = new StringBuilder();
    for (char c : letters) {
        builder.append(c);
    }
    animals[i] = builder.toString();
}
System.out.println(Arrays.toString(animals));

输出：[tca, ogd, roptar, sifh]

编辑：要逐行打印，请将最后一行更改为，

for (String s : animals) {
    System.out.println(s);
}

如何在 android 中打乱数组的字母？

how to shuffle a letters of array in android?

arrays

string

random

android

shuffle