More than one file was found with OS independent path 'META-INF/INDEX.LIST'

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今天项目新建了netty_lib的module，引入了多个Netty的jar包，但是编译安装APK时却报错了:More than one file was found with OS independent path 'META-INF/INDEX.LIST'. 后来发现在每个jar下都有相似的结构和文件(如下图)

后来在网上搜索解决方案，在对应的库的build.gradle中加入如下代码:

android{
    ...



    packagingOptions {
        exclude 'META-INF/NOTICE' // will not include NOTICE file
        exclude 'META-INF/LICENSE' // will not include LICENSE file
        exclude 'META-INF/INDEX.LIST' // will not include INDEX.LIST file
    }
}

之后编译，but，还是报错。emmmm,继续搜索解决方案，又在app.gradle中加入上述代码，编译还是报错。最后又加入一句

exclude 'META-INF/*' 后成功解决了。

  最终解决方案：在对应的库的build.gradle中和app.gradle 都加入如下代码:

packagingOptions {
        exclude 'META-INF/*'
        exclude 'META-INF/NOTICE' // will not include NOTICE file
        exclude 'META-INF/LICENSE' // will not include LICENSE file
        exclude 'META-INF/INDEX.LIST' // will not include INDEX.LIST file
    }

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参考博客:https://blog.csdn.net/qq_36317441/article/details/82781222