把这段代码加入 build.gradle

buildscript {
    repositories {
        maven{ url "http://maven.aliyun.com/nexus/content/groups/public/"}
        google()
    }
}


allprojects {
    repositories {
        maven{ url "http://maven.aliyun.com/nexus/content/groups/public/"}
        google()
    }
}