如何在Java中从一组选定的颜色中输出一个随机的颜色？（Android）

Question

Random rand = new Random();
            int r = rand.nextInt(254)+1;
            int g = rand.nextInt(254)+1;
            int b = rand.nextInt(254)+1;

            int randomColor = Color.rgb(r,g,b);
            word.setTextColor(randomColor);

Answer 1

首先，在color.xml中定义颜色并创建颜色数组。

<?xml version="1.0" encoding="utf-8"?>
<resources>

<item name="blue" type="color">#FF33B5E5</item>
<item name="purple" type="color">#FFAA66CC</item>
<item name="green" type="color">#FF99CC00</item>
<item name="orange" type="color">#FFFFBB33</item>
<item name="red" type="color">#FFFF4444</item>
<item name="darkblue" type="color">#FF0099CC</item>
<item name="darkpurple" type="color">#FF9933CC</item>
<item name="darkgreen" type="color">#FF669900</item>
<item name="darkorange" type="color">#FFFF8800</item>
<item name="darkred" type="color">#FFCC0000</item>

<integer-array name="androidcolors">
    <item>@color/blue</item>
    <item>@color/purple</item>
    <item>@color/green</item>
    <item>@color/orange</item>
    <item>@color/red</item>
    <item>@color/darkblue</item>
    <item>@color/darkpurple</item>
    <item>@color/darkgreen</item>
    <item>@color/darkorange</item>
    <item>@color/darkred</item>
</integer-array>

</resources>

现在，在oncreate方法中生成如下所示的随机颜色。

int[] androidColors = getResources().getIntArray(R.array.androidcolors);
int randomAndroidColor = androidColors[new Random().nextInt(androidColors.length)];

最后设置生成的颜色。

view.setBackgroundColor(randomAndroidColor);