Android 洗牌列表/遍历数组项/将方法一分为二

我正在编写一个函数，其中图像通过无序列表显示

private int measurementCount = 0;

public int createShuffledList(){
    List<Integer> indexes = new ArrayList< >();
    for (int i = 1; i <= MEASUEREMENTREPEATS; i++) {
        indexes.add(i);
    }
    Collections.shuffle(indexes);

    Log.d("QD", "Shuffled index: " + indexes);

    int randomPrimeNumber = (int) indexes.get(measurementCount);

    Log.d("QD", "Value from index: " + randomPrimeNumber);

    primeindex = randomPrimeNumber;

    Log.d("QD", "Vale of primeindex index: " + primeindex);

    return primeindex;
}

是否可以将洗牌后的数组切换到下一个遍历数组项的方法

祝你一切顺利，谢谢你

---

tigercode

是的，您可以这样做，您的方法（函数）需要返回整数列表

public List<Integer> createShuffledList(){
    List<Integer> indexes = new ArrayList< >();
    for (int i = 1; i <= MEASUEREMENTREPEATS; i++) {
        indexes.add(i);
    }
    Collections.shuffle(indexes);
    Log.d("QD", "Shuffled index: " + indexes);
    return indexes;
}

请注意

IndexOutOfBoundsException

，您不能调用超出列表大小的索引

================更新 如何使用你的方法

public class ExampleShuffledList {
    private static final int MEASUEREMENTREPEATS = 10;
    List<Integer> yourList;
    int measurementCount;

    public List<Integer> createShuffledList(){
        List<Integer> indexes = new ArrayList<>();
        for (int i = 1; i <= MEASUEREMENTREPEATS; i++) {
            indexes.add(i);
        }
        Collections.shuffle(indexes);
        return indexes;
    }

    public void someMethodWhereYouWantToUseList(){
        yourList = createShuffledList();
        measurementCount = 0; //you declere it somehow
        Integer yourShuffledIndex = yourList.get(measurementCount); //just call get to get the index from list
    }
}

公共类示例ShuffledList{
专用静态最终内部测量中心=10；
列出你的清单；
国际计量账户；
公共列表createShuffledList（）{
列表索引=新的ArrayList（）；
对于（int i=1；i Hi Mij，但是我的getNextShufffledListItem（）现在找不到“索引”-我是否必须将它们声明为整数（或类似的？）呢？这有点毫无意义。你可以调用
索引。get（measurementCount）
但是你的索引必须是类变量，我更新了答案，请检查一下。
public List<Integer> createShuffledList(){
    List<Integer> indexes = new ArrayList< >();
    for (int i = 1; i <= MEASUEREMENTREPEATS; i++) {
        indexes.add(i);
    }
    Collections.shuffle(indexes);
    Log.d("QD", "Shuffled index: " + indexes);
    return indexes;
}

indexes.get(yourIndex);

public class ExampleShuffledList {
    private static final int MEASUEREMENTREPEATS = 10;
    List<Integer> yourList;
    int measurementCount;

    public List<Integer> createShuffledList(){
        List<Integer> indexes = new ArrayList<>();
        for (int i = 1; i <= MEASUEREMENTREPEATS; i++) {
            indexes.add(i);
        }
        Collections.shuffle(indexes);
        return indexes;
    }

    public void someMethodWhereYouWantToUseList(){
        yourList = createShuffledList();
        measurementCount = 0; //you declere it somehow
        Integer yourShuffledIndex = yourList.get(measurementCount); //just call get to get the index from list
    }
}