转载自：https://blog.csdn.net/yangshuaionline/article/details/90671322

报错信息：

Can't process attribute android:fillColor="@android:color/white": references to other resources are not supported by build-time PNG generation. File was preprocessed as vector drawable support was added in Android 5.0 (API level 21) See http://developer.android.com/tools/help/vector-asset-studio.html for details.

出问题代码：

<path android:fillColor="@android:color/white"
        android:pathData="M20,11L7.8,11l5.6,-5.6L12,4l-8,8l8,8l1.4,-1.4L7.8,13L20,13L20,11z" />

问题原因：

替换android:fillColor="@android:color/white"为android:fillColor="#ffffff"。在向量drawable中，fillColor必须明确设置属性，而不是引用其他资源

解决方法：

修改xml中的代码

<path android:fillColor="#FFFFFF"
        android:pathData="M20,11L7.8,11l5.6,-5.6L12,4l-8,8l8,8l1.4,-1.4L7.8,13L20,13L20,11z" />