大体原因就是访问国外的资源由于网络等原因导致访问失败，解决方法就是换成国内的源

修改项目的android/build.gradle 文件，将里面的

google()
mavenCentral()

替换为

  maven {
      allowInsecureProtocol = true
      url 'https://maven.aliyun.com/repository/google'
  }
  maven {
      allowInsecureProtocol = true
      url 'https://maven.aliyun.com/repository/jcenter'
  }
  maven {
      allowInsecureProtocol = true
      url 'http://maven.aliyun.com/nexus/content/groups/public'
  }