title: How to work on multiple Modules in android studio
body: <p>Can anyone tell me that how we will utilize the external_projects into our current project in android studio?</p>
  
  <p>Basically I have a small android project for "signIn/SignUp" purposes in the running state and I want to add up that project in one of my other project. I have imported it successfully by placing it in libs folder and also have added the dependencies. So now I am confused, how i will be able to merge them. how signIn/SignUp project will run in first and then the other.</p>