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

<resources>

    <color name = "white">#ffffffff</color>

    <color name = "red">#ffff0000</color>

    <color name = "black">#ff000000</color>

</resources>

在values下创建一个color.xml，然后在里边添加以下代码

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="white">#ffffffff</color>
</resources>