通过使用随机阵列更改按钮的背景图片 [英] Changing a buttons background image through using a random array

问题描述

OK，所以我试图让第二次点击此按钮可以显示图像。我有8个图像，它可以选择，我希望它随机选择它。我在字符串中建立一个数组与所有的 R.drawable.img ，我试图把它里面的这个

OK so I'm trying to get this button on its second click to display an image. I have 8 images for it to choose from and I want it to select it randomly. I set up an array with all of the R.drawable.img in the string and i tried placing it inside of this

   else if (click == 1)
                {
                    rpic = generator.nextInt(ppic);
                    spinntoke.setBackgroundResource(R.pic[rpic]);
                }

所以它不允许我这样做。任何想法如何，我可以得到随机发生器随机选择的8张图片的1被点击的时候吗？谢谢

So it is not allowing me to do that. Any ideas as to how i can get the random generator to select 1 of those 8 pictures at random when it is clicked? Thanks

推荐答案

您还没有真正提供足够的信息，但这里是什么我想你会怎么做。

You have not really provided enough info but here is what I imagine you would do.

有一个数组INT []，看起来像这样：[R.drawable.img1，R.drawable.img2，R.drawable.img3]

have an array int[] that looks like this: [R.drawable.img1, R.drawable.img2, R.drawable.img3]

在的onClick（）：随机=一些随机的0和array.size（） - 1之间;
spinntoke.setBackgroundResource（数组[随机]）;

in onClick(): random = some random between 0 and array.size()-1; spinntoke.setBackgroundResource(array[random]);

这种方式你的整数（你ř资源）数组，其中你可以选择一个随机。不要忘记，让您的随机数发生器只能生成从0号码数组大小-1。

This way you have an array of ints (your R resources) where you can pick a random one. Don't forget to make your random generator only generate numbers from 0 to the array size-1.

编辑：code：

Random randomGenerator = new Random();
int random = randomGenerator.nextInt(array.size());
spinntoke.setBackgroundResource(array[random]);

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