这报错是因为远程服务器ssh没有启用ssh-ed25519的key验证导致的问题。
解决办法就是修改sshd的配置,启用ssh-ed25519的部分之后,重启sshd既可。
解决办法来自:https://github.com/connectbot/connectbot/issues/477#issuecomment-280749514
未经允许不得转载:阿藏博客 » ConnectBot Key exchange was not finished, connection is closed. Cannot negotiate, proposal do not match. 解决办法