解决：Supertypes of the following classes cannot be resolved...

工程编译时 Android Studio 报错：

e: Supertypes of the following classes cannot be resolved. Please make sure you have the required dependencies in the classpath:

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报错位置：使用jar 中的interface ，编写时没有报错。编译时报错
最后解决方法：
将：

implementation fileTree(include: ['*.jar'], dir: 'libs')

改为：

api fileTree(include: ['*.jar'], dir: 'libs')