修改build.gradle的repositories
原内容：
repositories {
google()
mavenCentral()
}
修改为：
repositories {
maven {
url 'https://maven.aliyun.com/repository/google'
}
maven {
url 'https://maven.aliyun.com/repository/public'
}
maven {
url 'https://maven.aliyun.com/repository/jcenter'
}
}
allprojects {
repositories {
maven {
url 'https://maven.aliyun.com/repository/google'
}
maven {
url 'https://maven.aliyun.com/repository/public'
}
maven {
url 'https://maven.aliyun.com/repository/jcenter'
}
}
}
