在res/values文件夹下的color.xml添加
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="dkgray">#80808FF0</color>
<color name="yello">#F8F8FF00</color>
<color name="white">#FFFFFF</color>
<color name="darkgray">#938192</color>
<color name="lightgreen">#7cd12e</color>
<color name="black">#ff000000</color>
<color name="blue">#ff0000ff</color>
<color name="cyan">#ff00ffff</color>
<color name="gray">#ff888888</color>
<color name="green">#ff00ff00</color>
<color name="ltgray">#ffcccccc</color>
<color name="magenta">#ffff00ff</color>
<color name="red">#ffff0000</color>
<color name="transparent">#00000000</color>
<color name="yellow">#ffffff00</color>
</resources>
java 中使用颜色：R.color.xxx
xml中使用：@color/green
原文：https://www.cnblogs.com/zhaozilongcjiajia/p/10350744.html