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[MUSIC]

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Hello, everyone.

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My name is Michael Lustig and in this
workshop we're going to create a realtime

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messaging app using
the Firebase Realtime Database.

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If you're curious about what exactly
Firebase is in depth and what other

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features Firebase offers please check out
the workshop linked in the teachers notes.

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In this particular workshop,
we're going to focus on using FireBase

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in an Android application, rather than
going over its entire feature set.

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As I mentioned, we'll be creating a real
time messaging application for Android.

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In the app,
you'll be able to create a username,

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and then send messages to everyone
else that has your app installed.

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Since you'll be creating your own FireBase
project, on the FireBase console.

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You'll only see the messages from the
people that you've shared your app with.

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In other words,

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you won't see the messages from everyone
who goes through this workshop.

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That would certainly be possible, but

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we thought that might scale
way out of hand too quickly.

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When I'm learning,

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I like to see what the finished product
will look like before I get started.

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That helps to give me a clear view
on the end goal of what the lesson's

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going to teach.

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So let's go ahead and
check out the app in action.

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As you can see, when I first install
the app I need to create a username.

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In this workshop, we don't perform any
logic for verifying usernames, but

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try to pick something unique to you.

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Firebase provides great user
authentication but in this workshop,

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we're going to stick with just learning
about the real time database capabilities.

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Stay tuned for workshops covering
Firebase's other great features.

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Once I've chosen the username,

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I can log in where I'm taking
the screen full of messages.

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I'll bring up another emulator to
show you how cool this truly is.

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As well as my Firebase console
open to the database page so

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that you can see that all of this
is truly happening in real time.

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I've already logged in
on this other emulator.

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So once I send a message it should almost
instantly appear in both the Firebase

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console as well as on the list
of messages on both emulators.

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Let's go ahead and give that a try.

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I'll type a message, Treehouse is
super rad, and click the send button.

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Viola, the messages appear
on both the emulators and

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our database flashes green I know
that this app is fairly simple.

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But every time I use Firebase, I'm amazed
by how much complexity they've alleviated

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by handling all of the issues that arise
from an app with a real time requirement.

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Now that you've got a better idea of
exactly the project that you'll be

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creating in the workshop.

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I'm going to show you how to set up
the starter files on your machine to

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follow along.

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While it isn't vital that you follow
along, writing the code along with me will

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be the best way to truly
understand how everything works