工具：AndroidStudio3.6 git
首次上传新的代码到新创建的空的仓库
（1）.右击项目根目录，选择Git-Add，添加所有文件进入版本控制。
（2）.右键整个项目点击Git---> Commit Directory提交文件
(3) .在项目的Terminal窗口里输入命令：
git push --set-upstream [email protected]:xxx/xxx.git master
在这一步中可能会出现错误
To gitlab.com:qbb_android/QBBUI.git
! [rejected] master -> master (fetch first)
error: failed to push some refs to '[email protected]:qbb_android/QBBUI.git'
hint: Updates were rejected because the remote contains work that you do
hint: not have locally. This is usually caused by another repository pushing
hint: to the same ref. You may want to first integrate the remote changes
hint: (e.g., 'git pull ...') before pushing again.
hint: See the 'Note about fast-forwards' in 'git push --help' for details.
这是因为我们服务端创建的项目中有一个README文件，而本地没有。
使用下面git命令可以解决
git pull --rebase origin master
git push -u origin master