来自Array的随机图像

来自Array的随机图像 - Android(Random Images from Array - Android)

嗨，我收到错误“意外令牌”为（int i = 0; i <4; i ++）

我有两个阵列，里面有相同的图像。 在这个例子中，我有2个阵列，有3个图像（每个阵列中的图像相同）。 我想从每个阵列获得2个随机图像，它们必须是相同的图像（因此是一对）。 关于我做错什么的任何输入都会很棒！

然后我想将这些图像放在图像按钮上。

public class Card { ArrayList<Integer> list=new ArrayList<Integer>(); ArrayList<Integer> list1=new ArrayList<Integer>(); Random r1=new Random(); int[] imageArray1 = new int[] {R.drawable.raptors, R.drawable.okc_thunder, R.drawable.spurs}; int[] imageArray2 = new int[] {R.drawable.raptors, R.drawable.okc_thunder, R.drawable.spurs}; for(int i=0;i<4;i++) { while(true) { int next=r1.nextInt(10)+1; if(!list.contains(next)) { list.add(imageArray1[next]); list1.add(imageArray2[next]); break; } } } array1 = convertIntegers(list); array2 = convertIntegers(list1); public static int[] convertIntegers(List<Integer> integers) { int[] ret = new int[integers.size()]; Iterator<Integer> iterator = integers.iterator(); for (int i = 0; i < ret.length; i++) { ret[i] = iterator.next().intValue(); } return ret; }

}

Hi I am getting the error "unexpected token" at for (int i=0; i<4; i++)

I have two arrays with the same images inside. In this example I have 2 arrays with 3 images (images are the same in each array). I want to get 2 random images from each array and they must be the same image (therefore being a pair). Any input on what im doing wrong would be great!

THEN I want to put these images onto image buttons.

public class Card { ArrayList<Integer> list=new ArrayList<Integer>(); ArrayList<Integer> list1=new ArrayList<Integer>(); Random r1=new Random(); int[] imageArray1 = new int[] {R.drawable.raptors, R.drawable.okc_thunder, R.drawable.spurs}; int[] imageArray2 = new int[] {R.drawable.raptors, R.drawable.okc_thunder, R.drawable.spurs}; for(int i=0;i<4;i++) { while(true) { int next=r1.nextInt(10)+1; if(!list.contains(next)) { list.add(imageArray1[next]); list1.add(imageArray2[next]); break; } } } array1 = convertIntegers(list); array2 = convertIntegers(list1); public static int[] convertIntegers(List<Integer> integers) { int[] ret = new int[integers.size()]; Iterator<Integer> iterator = integers.iterator(); for (int i = 0; i < ret.length; i++) { ret[i] = iterator.next().intValue(); } return ret; }

}

最满意答案

如果它们保持相同的数据，为什么要使用两个数组？

int[] imageArray1 = new int[] {R.drawable.raptors, R.drawable.okc_thunder, R.drawable.spurs}; int[] imageArray2 = new int[] {R.drawable.raptors, R.drawable.okc_thunder, R.drawable.spurs};

做就是了：

int[] imageArray = new int[] {R.drawable.raptors, R.drawable.okc_thunder, R.drawable.spurs};

另外，我不明白你为什么要使用数组列表和while循环。 我会这样做：

public int getRandomCard() { return this.imageArray[r1.nextInt(3)]; }

Why use two arrays if they hold the same data anyway?

int[] imageArray1 = new int[] {R.drawable.raptors, R.drawable.okc_thunder, R.drawable.spurs}; int[] imageArray2 = new int[] {R.drawable.raptors, R.drawable.okc_thunder, R.drawable.spurs};

Just do:

int[] imageArray = new int[] {R.drawable.raptors, R.drawable.okc_thunder, R.drawable.spurs};

Also I don't get the point why you're using array lists and while loops. I would do it like this:

public int getRandomCard() { return this.imageArray[r1.nextInt(3)]; }