ERROR: Unable to resolve dependency for ':app@debug/compileClasspath': Could not download eventbus.j

下载不到相应的类库，添加镜像源 

在project  build.gradle更改为

allprojects {
    repositories {
        maven {
            url "https://maven.aliyun.com/repository/google"
        }
        maven {
            url "https://maven.aliyun.com/repository/jcenter"
        }
    }
}