Clone failed Unable to negotiate with ... port ...: no matching key exchange method Their offer:...

1. 这个报错之前有一个另外一个由于未添加ssh key 引起的问题。因为之前不知道每次都要新建gerrit实例。
   添加key：
   ssh-keygen -t rsa
   查看并把公匙添加到git：
   cat ~.sshid_rsa.pub
   添加私匙：
   ssh key
   ssh-agent bash
   ssh-add id_rsa
2. 然后在Android Studio中clone项目时出现错误
   Unable to negotiate with … port …: no matching key exchange method found. Their offer: diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
   Could not read from remote repository.
   Please make sure you have the correct access rights
   and the repository exists.

查了一下，有的帖子说可以添加一个config文件，试了没有用。
还有一个可能是因为客户端和服务器端git版本不一致导致的。解决方法是根据‘their offer’ 分别添加：

$ export GIT_SSH_COMMAND='ssh -o KexAlgorithms=+diffie-hellman-group1-sha1'

$ export GIT_SSH_COMMAND='ssh -o KexAlgorithms=+diffie-hellman-group14-sha1'

成功clone。