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Android Development Masterclass

Using Firebase Realtime Databases for Storing Data

Explore how to set up and use Firebase Realtime Database in Android applications. Learn to perform CRUD operations, enable disk persistence for offline access, and manage data synchronization across devices. This lesson equips you with practical knowledge to handle real-time user data effectively.

We'll cover the following...

Introduction

Firebase Realtime Database is a NoSQL database solution that we can use to store our user-related data in the cloud. The data is stored in a JSON format and is updated every time the client connects. Realtime Database is handy when we need to sync user data across devices. Firebase makes the new data automatically available to all the devices as soon as they’re connected.

Let’s learn how to set up Firebase Realtime Database in our application, and then use it to read and write some test data. Also, we’ll go over a couple of key features offered by the realtime database.

Note: We need to create a Firebase project and configure the app before we can start using Firebase Realtime Databases in the project.

Add a library dependency

To use Firebase Realtime Database in our application, we first need to add its dependency in the app/build.gradle file.

Kotlin 1.5
dependencies {
    implementation platform('com.google.firebase:firebase-bom:29.0.4')
    // add realtime database dependency
    implementation 'com.google.firebase:firebase-database-ktx'
}
...