如何在android studio中更改包名称?

我制作了一个应用程序，这是我的第一个应用程序，所以当我开始编码时，我将包名称保留为 com.example.stuff，现在当我尝试上传到 Play 商店时，由于包裹名字.我尝试过重构-> 重命名包名称并在 AndroidManifst.xml 中更改它，然后我尝试再次上传.我一次又一次地收到同样的信息.

I have made an app and it is my very first app so when I started coding, I left the package name as com.example.stuff and now when I try to upload to the play store it wont let me due to the package name. I have tried refactor-> rename the package name and changed it in the AndroidManifst.xml then I tried to upload again. I am once again left with the same message time after time.

我感谢任何帮助并提前致谢.:)

I appreciate any help and thanks in advance. :)