Heres is what i did without plugins
Already have a project in Android Studio
1- Create the repository on your Bitbucket account
2- In Android Studio, Go to VCS
3- Choose 'Enable version control'
4- Choose Git and press OK
5- Right click on your project, choose Git then click Add
6- Go to VCS -> Commit Changes
7- Uncheck 'Perform Code Analysis'
8- Press Commit and Push in the Commit button
9- A new window will open, on the left press the DEFINE REMOTE link
10- Go to your Bitbucket repository Overview
11- Click on 'I have an existing Project'
12- Copy the link from bitbucket to the URL tab in the Define Remote Window ,e.g. 'git@bitbucket.org:username/project.git' without the 'git remote add origin...' (maybe it will ask you for a password of your bitbucket account), press Ok
13 Press Push, and it's done