This should be a really simple question :)
I have a project that works fine. Now I wanted to rename it and to change the path of the projectfolder. First it seemd simple
What works for me:
1. Moving Project:
Close Android Studio .You can try to copy and paste the project normally. If there is Path error due to path to long. What I do normaly is compressing the project to rar file. copy paste to new location and extract It. For winrar use extract here as the actual root folder is inside the rar
2. Rename the project:
Rename the root folder to your new project name.
3. Open In Android Studio
Notice that when you open android studio, it will open the old project file by default. Close the project by going to File>Close Project. Then open your new project.