how to add another project in my existing Android Studio project?

I'm getting some image cropping demo from the net , and I'm trying to import that lib project in my existing android studio project. I don't understand how to import lib project in my project .

Here is getting demo from net.

enter image description here

See this is highlighted the folder name cropper . This demo is getting from net .How to done same as in my existing project.

How do I add an existing project to Android Studio?

Launch Android Studio, and click File > New > Import Project. Locate your project directory, click the build. gradle file you created above to select it, and then click OK to import your project.

Can I open two projects in Android Studio?

To open multiple projects simultaneously in Android Studio, go to Settings > Appearance & Behavior > System Settings, in the Project Opening section, choose Open project in new window.

Go to File->New->Import Module then browse you project. After importing module go to project structure and add module dependency to your project.