About Firebase

Connect Firebase to your Android project

Prerequisites

• Install or update [Help > Check for Update] Android Studio to its latest version.

• Make sure that your project meets these requirements:

  • Targets API level 19 (KitKat) or higher [Gradle Scripts > build.gradle(app) > android.defaultConfig { minSdk 23 }]
  • Uses Android 4.4 or higher [Gradle Scripts > gradle-wrapper.properties > distributionUrl=.../gradle-7.5-bin.zip]
  • Uses Jetpack (AndroidX) [Gradle Scripts > gradle.properties > android.useAndroidX=true & Gradle Scripts > build.gradle(app) > android{compileSdk 33}]

• Set up a physical device or use an emulator( Google Play services require or emulator have Google Play services installed) to run your app.

• Sign into Firebase using your Google account.

connect your Android app to Firebase using one of the following options:

• Option 1: Adding your app to Firebase console(recommended)

• Option 2: Installing the SD

Option 1: Adding your app to Firebase console

• Visit firebase console

• Click [Add project > Continue.. > Choose or create a Google Analytics account > Continue..]

• Click the Android icon (plat_android) or Add app to launch the setup
  

• Enter your app's package name[A package name uniquely identifies your app on the device and in the Google Play Store] in the Android package name field [app > java > MainActivity > "com.example..."]. or go application ID [build.gradle > android { defaultConfig {applicationId "com.example..."}}]

Enter other app information: App nickname and Debug signing certificate SHA-1(Optional).

Then Click Register app.

• Download (google-services.json) file. Then move root directory(Project) of your app and paste file.
  

• To make the google-services.json config values accessible to Firebase SDKs, you need add the Google services Gradle plug-in to your project-level: build.gradle.
  

buildscript {
  repositories {
    google()
    mavenCentral() 
  }
  dependencies {  
    classpath 'com.google.gms:google-services:4.3.15'
  }
}

Note : only buildscript {}, pluginManagement {} and other plugins {} script blocks are allowed before plugins {} blocks, no other statements are allowed.

• Then, in your module (app-level) build.gradle file, add both the google-services plug-in

plugins {
  id 'com.android.application'
  id 'com.google.gms.google-services'
}

dependencies {
  implementation platform('com.google.firebase:firebase-bom:31.2.0')

// When using the BoM, don't specify versions in Firebase dependencies
  implementation 'com.google.firebase:firebase-analytics-ktx'
}

After adding the plug-in and the desired SDKs, sync your Android project with the Gradle files.

• Finally

• https://firebase.google.com/docs/android/setup