#1) FireApp Sends Data to server - uses Firebase.setAndroidContext(this) inside the onCreate of MainActivity

#2) FireApp2 Sends data to server - uses a Application to implement Firebase.setAndroidContext(this).

#3) FireApp3 Retrive data from server in our app.

#4) FireApp4 Fetching data and displaying in ListView

#5) FireApp5 User auth with email and login

#6) FireApp6 User auth using google account

#7) FireApp7 retriving data using firebase ui in listview

#8) FireApp8 Capture image from mobile cam. send it to server and then display it to the Application activity.

This app contains use of almost all the above example apps

#Firebase SDK release mode - https://firebase.google.com/support/release-notes/android

Some FAQ you can go through in your free time : https://firebase.google.com/support/faq