You can install .apk files to emulator regardless of
what you are using (Eclipse or Android Studio)
here's what I always do: (For full beginners)
1- Run the emulator, and wait until it's completely started.
2- Go to your sdk installation folder then go to
platform-tools (you should see an executable called
3- create a new file and call it run.bat, edit the file
with notepad and write CMD in it and save it.
4- copy your desired apk to the same folder
5- now open run.bat and write
6- wait until the installation is complete
7- voila your apk is installed to your emulator.
Note: to re-install the application if it already
adb install -r
sorry for the detailed instruction as I said for full beginners
Hope this help.