android studio加载不了aar包问题

问题如下：
Failed to resolve: :xxxx: Open File

buidl.gradle配置：

dependencies {
    compile fileTree(dir: 'libs', include: '*.jar')
    compile(name: 'xxx-debug', ext: 'aar')
    compile(name: 'xxx-sit-debug', ext: 'aar')
}

问题解决：
在repositories 添加flatDir { dirs ‘libs’ }表示工程要依赖libs开发：

repositories {
flatDir { dirs 'libs' }
}
dependencies {
    compile fileTree(dir: 'libs', include: '*.jar')
    compile(name: 'xxx-debug', ext: 'aar')
    compile(name: 'xxx-sit-debug', ext: 'aar')
}

转载：https://blog.youkuaiyun.com/chenlove1/article/details/52682378