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Select platform: Android iOS Unity Flutter

Integrating the Google Mobile Ads SDK into a Flutter app is the first step toward displaying ads and earning revenue. Once you've integrated the SDK, you can proceed to implement one or more of the supported ad formats.

Prerequisites

Import the Mobile Ads SDK

Platform specific setup

Android

Update AndroidManifest.xml

The AdMob app ID must be included in the AndroidManifest.xml. Failure to do so results in a crash on app launch.

Add the AdMob app ID, as identified in the AdMob web interface, to the app's android/app/src/main/AndroidManifest.xml file by adding a <meta-data> tag with the name com.google.android.gms.ads.APPLICATION_ID. For android:value, insert your own app ID in quotes as shown:

<manifest>
    <application>
        <!-- Sample AdMob app ID: ca-app-pub-3940256099942544~3347511713 -->
        <meta-data
            android:name="com.google.android.gms.ads.APPLICATION_ID"
            android:value="ca-app-pub-xxxxxxxxxxxxxxxx~yyyyyyyyyy"/>
    <application>
<manifest>

Use the same value when you initialize the plugin in your Dart code.

See the Android guide for more information about configuring AndroidManifest.xml and setting up the app ID.

iOS

Update Info.plist

In your app's ios/Runner/Info.plist file, add a GADApplicationIdentifier key with a string value of your AdMob app ID, as identified in the AdMob web interface: 

<key>GADApplicationIdentifier</key>
<string>ca-app-pub-################~##########</string>

You must pass the same value when you initialize the plugin in your Dart code.

See the iOS guide for more information about configuring Info.plist and setting up the app ID.

Initialize the Mobile Ads SDK

Before loading ads, have your app initialize the Mobile Ads SDK by calling MobileAds.instance.initialize() which initializes the SDK and returns a Future that finishes once initialization is complete, or after a 30-second timeout. This needs to be done only once, ideally right before running the app.

import 'package:google_mobile_ads/google_mobile_ads.dart';
import 'package:flutter/material.dart';

void main() {
  WidgetsFlutterBinding.ensureInitialized();
  MobileAds.instance.initialize();

  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  @override
  MyAppState createState() => MyAppState();
}

class MyAppState extends State<MyApp> {
  @override
  void initState() {
    super.initState();
    // Load ads.
  }
}

Select an ad format

After the Mobile Ads SDK is imported, you're ready to implement an ad. AdMob offers a number of different ad formats, so you can choose the one that best fits your app's user experience.

Rectangular ads that appear at the top or bottom of the device screen. Banner ads stay on screen while users are interacting with the app, and can refresh automatically after a certain period of time. If you're new to mobile advertising, they're a great place to start.

Implement a Banner ad

Interstitial

Full-screen ads that cover the interface of an app until closed by the user. They're best used at natural pauses in the flow of an app's execution, such as in between levels of a game or just after completing a task.

Implement an Interstitial ad

Native

Customizable ads that match the look and feel of your app. You decide how and where they're placed, so the layout is more consistent with your app's design.

Implement a Native ad

Rewarded

Ads that reward users for watching short videos and interacting with playable ads and surveys. Good for monetizing free-to-play users.

Implement a Rewarded ad