Lets address the two use cases
**Rename a package name or Trim a package **
com.mycompany.mystupidapplicationname to com.mycompany.brandname
or
com.someothercompany.mystupidapplicationname to com.someothercompany.mystupidapplicationname
or
com.someothercompany.mystupidapplicationname to
someothercompany.brandname
- Select Package in the drop down in Android Studio
- Right click on the package which contains your MainActivity and refractor it
- Select Rename Package and everything will work like a charm
But this will only rename the last part of package name
- To rename the first or second part of package name . Create a new dummy file in the part of package which you want to rename. the file will be created inside mycompany.com.myapplicationame. Then move the file inside mycompany(right click => move) to make mycompany appear in tree view. This will make that part part of the tree view and will you help you to do a right click and rename that part.
Delete the dummy file
To Trim a package , simply right click and move the package part inside its grand parent