Devfest SouthWest, Nigeria - Firebase

This presentation contains an introduction to Firebase and walks through a code-lab for creating a real-time Android Chat application with offline functionality.

1. BUILDING REALTIME MOBILE APPS WITH FIREBASE Moyinoluwa ADEYEMI November 28, 2015
2. Firebase is a powerful platform for building realtime feature-rich apps
3. Realtime Database NoSQL JSON data store Cross-platform client-side SDKs Restful API Works Offline Auto-scaling
4. Authentication Anonymous Email / password Social Custom
5. Hosting Free static asset hosting SSL certificate Global CDN Single command deploys One-click rollbacks Custom domains
6. So you want to learn how to build a realtime mobile chat application with Firebase?
8. Sign up on https://www.firebase.com/ to get a firebase (data) url
9. Add the library dependency directly to your app’s gradle.build file In cases of build errors caused by duplicate files, exclude those files by adding these too
10. Connect your app to Firebase
11. Edit your AndroidManifest.xml file First, request an INTERNET permission in the <manifest> tag Next, change the name of the application
12. Create a Chat Model class
13. Send a message to Firebase Create a new Activity, complete with a layout that looks better than this. Be sure to add a <ListView />, an <EditText /> for collecting messages and a <Button /> for sending the data.
14. Send a message to Firebase Create a reference to Firebase in the Activity and insert your own firebase url.
15. Send a message to Firebase Retrieve the text from the EditText and push to Firebase
16. Retrieve a message from Firebase Create a layout for the chat. It could look like this, or even better
17. Retrieve a message from Firebase Create a ChatAdapter class that extends FirebaseListAdapter
18. Retrieve a message from Firebase Create a ChatAdapter class that extends FirebaseListAdapter
19. Retrieve a message from Firebase Override onStart() in MainActivity to read and display the messages
20. Retrieve a message from Firebase Override onStop() in MainActivity to remove all the data
21. Implement offline functionality with Firebase With just one line of code… seriously
22. Woohoo!!! You now have a very basic Firebase app that sends, receives, displays messages and functions offline.
23. Credits The official Firebase Chat App example was modified to produce this app. The complete app including Login functionality implemented with Firebase is available on Github here: https://github.com/moyheen/LagosFirebaseCodelab
24. Twitter LinkedIn Github Moyinoluwa ADEYEMI Thank You!