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