How to connect Android Studio with Bitbucket Git repository across multiple computers

You can download Git from multiple sources online or download SourceTree which includes Git from Bitbucket (recommended).

Sign up with your email on Bitbucket, then create a repository from the 'Create a repository' option at the 'Repositories' option found on the website header. Make sure the repository type is 'Git'.

Send invitations of the repository to your team members whether from the repository dashboard invite option or from Settings -> User & Group Access and make sure they can read and write to be able to push and pull files from the repository later.  

To move on without errors, you need to make sure that the repository is empty or at least only contains the readme file, you can check this from the Bitbucket account at the 'Source' option.

Whether you have an existing Android Studio or starting a new project, you should enable versions control in them. Go to VCS drop down menu at the top of your Android Studio screen, then click on 'Enable Version Control Integration'.

After clicking on the Enable Version Control Integration, a new form will be opened. Choose Git from the drop down list of the version control system and then click 'Ok'.

Right click on the application item - that includes all the application files except the Gradle - from the project panel. Click Git then choose add.

Click on the terminal panel to open the terminal of the Android Studio, then add the following commands with your information:  git config --global user.name 'YOUR NAME' git config --global user.email 'YOUR EMAIL' (See How to Connect VR Box to PC?)

Go to your repository on the Bitbucket account on your browser. At the overview panel, copy the repository HTTPS URL at the top right of the panel. Make sure to select HTTPS URL not SSH, HTTPS protocol will only be covered in this summary, SSH is a more secured protocol that might require more steps.

Go back to the terminal on the repository, and write down the following commands with the URL you just copied on the second line: git init
git remote add origin YourCopiedRepositoryURL

Write the following commands in the terminal on Android Studio:  git init git pull origin master --allow-unrelated-histories

Write down the following commands in the Android Studio terminal to commit and push the project to the repository:  git add --all
git commit -m 'initial commit'
git push -u origin master

To let your team mates pull the project, they have to repeat step 9, then create an empty folder locally where they want to have the project cloned into.

Your team mates should go to the Android Studio, click on VCS menu -> Checkout from Version Control -> Git. Then they should paste the HTTPS URL of the repository into the 'Git Repository URL' text field. Finally, they should choose their parent directory to be the empty folder they created earlier.

If syncing errors show up, let the Android Studio sync and update all what it needs to make a successful clone.  

You can commit, push, pull, merge and resolve code conflicts easily from Android Studio with team mates at this point. Just make sure to commit, push or pull whether from the 'Commit changes' and 'Update project' buttons on the Android Studio or Git option menu from the VCS menu. (See How to connect Bluetooth Headphones to your Android device?)