Get Started with Firebase Realtime Database for Unity

The Firebase Realtime Database stores and synchronizes data with our NoSQL cloud database. Data is synced across all clients in realtime, and remains available when your app goes offline.

Before you begin

Before you can use the Firebase Realtime Database, you will need to create a Firebase project, and add the Firebase Unity SDK packages to your Unity project.

Setup:

Prerequisites

Android

iOS

  • Unity 5.0 or later
  • Xcode 7.0 or later

If you don't have a Unity project already, you can download one of our quickstart samples and experiment with a specific Firebase feature. If you're using a quickstart, remember to get the bundle identifier from the project settings; you need it for the next step.

Set up your app in the Firebase console

To add Firebase to your app, you need a Firebase project and a Firebase configuration file for your app.

Create a Firebase project in the Firebase console if you don't already have one. If you already have an existing Google project associated with your mobile app, click Import Google Project. Otherwise, click Create New Project.

Android

  1. Click Add Firebase to your Android app and follow the setup steps. If you're importing an existing Google project, this may happen automatically and you can just download the config file.
  2. When prompted, enter your app's package name. It's important to enter the package name your app is using; this can only be set when you add an app to your Firebase project.
  3. Download a google-services.json file when instructed. You can redownload this file again at any time.
  4. Copy this file to anywhere inside your project's assets folder.

IOs

  1. Click Add Firebase to your iOS app and follow the setup steps. If you're importing an existing Google project, this may happen automatically and you can just download the config file.
  2. When prompted, enter your app's bundle ID. It's important to enter the bundle ID your app is using; this can only be set when you add an app to your Firebase project.
  3. Download a GoogleService-Info.plist file when instructed. You can redownload this file again at any time.
  4. Add the GoogleService-Info.plist file to the project.

  5. Drag the GoogleService-Info.plist downloaded from the Firebase console into any folder in the Unity project.

Add the Firebase Unity SDK to your app

  1. Download the Firebase Unity SDK.
  2. Select the Assets > Import Package > Custom Package menu item.
  3. Import the FirebaseDatabase.unitypackage package from the Firebase Unity SDK, downloaded previously.
  4. When the Import Unity Package window appears, click the Import button.

Build your app

Android

  1. Select the File > Build Settings menu option.
  2. Select Android in the Platform list.
  3. Click Switch Platform to select Android as the target platform.
  4. Wait for the spinner (compiling) icon in the bottom right corner of the Unity status bar to stop.
  5. Click Build and Run.

iOS

  1. Select the File > Build Settings menu option.
  2. Select iOS in the Platform list.
  3. Click Switch Platform to select iOS as the target platform.
  4. Wait for the spinner (compiling) icon in the bottom right corner of the Unity status bar to stop.
  5. Click Build and Run.

Setting up public access

The Realtime Database provides a declarative rules language that allows you to define how your data should be structured, how it should be indexed, and when your data can be read from and written to. By default, read and write access to your database is restricted so only authenticated users can read or write data. To get started without setting up Authentication, you can configure your rules for public access. This does make your database open to anyone, even people not using your app, so be sure to restrict your database again when you set up authentication.

Configuring the SDK for the Unity Editor.

When testing your scene in the Unity Editor, you can use the Realtime Database. You must configure the SDK with the proper database URL. Call SetEditorDatabaseUrl with the url of your database.

using Firebase;
using Firebase.Unity.Editor;

public class MyScript: MonoBehaviour {
  void Start() {
    // Set this before calling into the realtime database.
    FirebaseApp.DefaultInstance.SetEditorDatabaseUrl("https://YOUR-FIREBASE-APP.firebaseio.com/");
  }
}

If you have chosen to use public access for your rules and have set the database url, you can proceed to the sections on saving and retrieving data.

Optional. Editor Setup for restricted access.

If you choose to use rules that disallow public access, you will need to configure the SDK to use a service account to run in the Unity Editor. This will also allow you to impersonate end users while testing. To do this first create a new p12 file via

https://console.cloud.google.com/iam-admin/serviceaccounts/project?project=YOUR-FIREBASE-APP

Record the generated email and password of the service account.

Place the p12 file under "Editor Default Resources" within your Unity project. Next, add the following code to initialize usage of the service account.

using Firebase;
using Firebase.Unity.Editor;

public class MyScript: MonoBehaviour {
  void Start() {
    // Set these values before calling into the realtime database.
    FirebaseApp.DefaultInstance.SetEditorDatabaseUrl("https://YOUR-FIREBASE-APP.firebaseio.com/");
    FirebaseApp.DefaultInstance.SetEditorP12FileName("YOUR-FIREBASE-APP-P12.p12");
    FirebaseApp.DefaultInstance.SetEditorServiceAccountEmail("SERVICE-ACCOUNT-ID@YOUR-FIREBASE-APP.iam.gserviceaccount.com");
    FirebaseApp.DefaultInstance.SetEditorP12Password("notasecret");
  }
}

Next Steps

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