Hi Guys, Welcome to Proto Coders Point, In this flutter tutorial we will learn how to monetize flutter app with Google Admob ads.

So, you have an flutter app published on App Store or you have completed building your flutter app & want to integrate ads into your flutter app?

Lucky, you are in a right place, I have explained the step by step process on how to get ads on your app. So let’s begin.

You need to create an Admob Account

Here is a article step by step process to create account and add app in your admob account.

• Goto Admob.com
• SignIn/SignUp with your Google Account.
• Goto App > Add App
  – select, YES, if you have already published App on Appstore or NO.
• if Published, then give the package name/URL of your app.
• A unique App ID will be generated for your Admob ads app.

<!-- Sample AdMob App ID: ca-app-pub-3940256099942544~3347511713 --> 

• Then, Click on “create Ad Unit”.
• An Admob ad unit will be generated.

adUnitId: 'ca-app-pub-3940256099942544/6300978111'

Use this ad unit id in your flutter app to display ads in your apps.

Now, Let’s move to flutter project where you want to integrate admob ads and display ads to your app users.

How to integrate admob ads in flutter apps

1. Add dependency: Google_Mobile_Ads Package

In your flutter project open pubspec.yaml and in dependencies section add the google mobile ads package dependencies

dependencies:
  google_mobile_ads: ^0.13.0  # version may change check it 

Important Note: project configuration required to use above google mobile ads flutter ads package.

Flutter: 1.22.0 or higher.

• Android:
  Android Studio version 3.2 or higher.
  Target SDK version or minSDKVersion 19 and higher.
  Set CompileSdkVersion 28 or higher.
  Android Gradle Plugin 4.1 or high.

2. Android Platform Setup

Admob provided App Id should be added in AndroidManifest.xml as meta-data tag inside Application Tag.

 <application
        android:label="flutter_app_simple"
        android:icon="@mipmap/ic_launcher">

       <!-- 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-3940256099942544~3347511713"/>   // replace App id with your app id 


    </application>

Note: you need to replace App ID in android:value=” your app id”;

3. iOS Platform Setup

Update Info.plist

In your flutter project, navigate to “ios/Runner/Info.plist” open it & at bottom before end of </dict> add the below key and string.

<key>GADApplicationIdentifier</key>
   <string>ca-app-pub-3940256099942544~1458002511</string>
   <key>SKAdNetworkItems</key>
     <array>
       <dict>
         <key>SKAdNetworkIdentifier</key>
         <string>cstr6suwn9.skadnetwork</string>
       </dict>
     </array>

A GADApplicationIdentifierkey with string value of your admob App ID.
A SKAdNetworkItems ey with google;’s SKANetwrkIdentifier value of skadnetwork.

4. Initialize theMobile Ads SDK

Before you actual load ads & display then to app users, you must call ‘MobileAds.instance’, which loads mobile ads SDK.

MobileAds.instance.initialize();

5. Create an instance object of Ad Eg: BannerAd

A BannerAd instance should be provided with adUnitID, AdSize, AdRequest and a BannerAdListener.

BannerAd bAd = new BannerAd(size: AdSize.banner, adUnitId: 'ca-app-pub-3940256099942544/6300978111', listener: BannerAdListener(
        onAdClosed: (Ad ad){
          print("Ad Closed");
        },
        onAdFailedToLoad: (Ad ad,LoadAdError error){
          ad.dispose();
        },
        onAdLoaded: (Ad ad){
          print('Ad Loaded');
        },
        onAdOpened: (Ad ad){
          print('Ad opened');
        }
    ), request: AdRequest());

In above replace with your own adUnitID.

Different Banner AdSize

AdSize.banner	320 x 50
AdSize.largeBanner	320 x 100
AdSize.mediumRectangle	320 x 250
AdSize.fullBanner	468 x 60
AdSize.leaderboard	728 x 90

6. Show ads – Banner ads to user

Then to load and display Admob Banner ads, you can make use of AdWidget.

AdWidget(
          ad: bAd..load(),
          key: UniqueKey(),
        ),

Here, In Ad property you need to pass the bannerAd we have created above.

Thus this will load banner ads in your flutter app, as shown in below screenshots.

Complete Source Code – Flutter Admob Monetize – Banner Ad

AdmobHelper.dart

import 'dart:io';

import 'package:google_mobile_ads/google_mobile_ads.dart';

class AdmobHelper{

  static String get bannerID => Platform.isAndroid ? 'ca-app-pub-3940256099942544/6300978111' : 'ca-app-pub-3940256099942544/6300978111';

  static initialize(){
    if(MobileAds.instance == null){
      MobileAds.instance.initialize();
    }
  }

static BannerAd getBannerAd(){
     BannerAd bAd = new BannerAd(size: AdSize.fullBanner, adUnitId: bannerID , listener: BannerAdListener(
        onAdClosed: (Ad ad){
          print("Ad Closed");
        },
        onAdFailedToLoad: (Ad ad,LoadAdError error){
          ad.dispose();
        },
        onAdLoaded: (Ad ad){
          print('Ad Loaded');
        },
        onAdOpened: (Ad ad){
          print('Ad opened');
        }
    ), request: AdRequest());

    return bAd;
  }
}

main.dart — Only Banner ads at bottom of the screen

Video Tutorial on Monitizing flutter app with google admob — Banner Ad at bottom

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_app_simple/AdmobHelper.dart';
import 'package:google_mobile_ads/google_mobile_ads.dart';

void main() {
 WidgetsFlutterBinding.ensureInitialized();
 AdmobHelper.initialize();
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Flutter Admob ad example',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomepage(),
    );
  }
}

class MyHomepage extends StatefulWidget {
  @override
  _MyHomepageState createState() => _MyHomepageState();
}

class _MyHomepageState extends State<MyHomepage> {

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: Text('Admob Banner Test Ads'),
      ),
      bottomNavigationBar: Container(
        child: AdWidget(
          ad: AdmobHelper.getBannerAd()..load(),
          key: UniqueKey(),
        ),
        height: 50,
      ),
    );
  }
}

Hurry! We are all set, If the test ads are working, Real-Time abs will show into your flutter application once you publish the app into AppStore, you can sit back and relax.😎.

---

---

Showing admob banner ads randomly in between listview builder

Video tutorial on flutter listview ads

Source Code

AdmobHelper.dart

import 'package:google_mobile_ads/google_mobile_ads.dart';


class AdmobHelper {

  static String get bannerUnit => 'ca-app-pub-3940256099942544/6300978111';

  static initialization(){
    if(MobileAds.instance == null)
      {
        MobileAds.instance.initialize();
      }
  }

  static BannerAd getBannerAd(){
    BannerAd bAd = new BannerAd(size: AdSize.fullBanner, adUnitId: 'ca-app-pub-3940256099942544/6300978111' , listener: BannerAdListener(
        onAdClosed: (Ad ad){
          print("Ad Closed");
        },
        onAdFailedToLoad: (Ad ad,LoadAdError error){
          ad.dispose();
        },
        onAdLoaded: (Ad ad){
          print('Ad Loaded');
        },
        onAdOpened: (Ad ad){
          print('Ad opened');
        }
    ), request: AdRequest());

    return bAd;
  }
}

main.dart

import 'dart:math';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_app_simple/AdmobHelper.dart';
import 'package:google_mobile_ads/google_mobile_ads.dart';

void main() {
  WidgetsFlutterBinding.ensureInitialized();
  AdmobHelper.initialization();
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Flutter Admob ad example',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomepage(),
    );
  }
}

class MyHomepage extends StatefulWidget {


  @override
  _MyHomepageState createState() => _MyHomepageState();
}

class _MyHomepageState extends State<MyHomepage> {
  late List<String> datas;   // late for null safty

  late List<Object> dataads;  // will store both data + banner ads 

  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    datas = [];

    //generate array list of string
    for(int i = 1; i <= 20; i++){
      datas.add("List Item $i");
    }

    dataads = List.from(datas);

    // insert admob banner object in between the array list
    for(int i =0 ; i<=2; i ++){
      var min = 1;
      var rm = new Random();

      //generate a random number from 2 to 18 (+ 1) 
      var rannumpos = min + rm.nextInt(18);

      //and add the banner ad to particular index of arraylist
      dataads.insert(rannumpos, AdmobHelper.getBannerAd()..load());

    }

  }



  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: ListView.builder(
          itemCount: dataads.length,
          itemBuilder: (context,index){
            //id dataads[index] is string show listtile with item in it
            if(dataads[index] is String)
              {
                return ListTile(
                  title: Text(dataads[index].toString()),
                  leading: Icon(Icons.exit_to_app),
                  trailing: Icon(Icons.ice_skating),
                );
              }else{
              // if dataads[index] is object (ads) then show container with adWidget
              final Container adcontent = Container(
                child: AdWidget(
                  ad: dataads[index] as BannerAd,
                  key: UniqueKey(),
                ),
                height: 50,
              );
              return adcontent;
            }

      }),
      bottomNavigationBar: Container(
        child: AdWidget(
          ad:AdmobHelper.getBannerAd()..load(),
          key: UniqueKey(),
        ),
        height: 50,
      ),

    );
  }
}

Output

---

---

How to show Interstitial ads in flutter app

Video Tutorial

Load Interstitial ad

To Load an InterstitialAd you need to pass some parameters those are adUnitId, an AdRequest(), and an adLoadCallback:InterstitialAdLoadCallback(…..).

Below is an snippet code to load admob Interstitial Ads in flutter

 InterstitialAd.load(
        adUnitId: 'ca-app-pub-3940256099942544/1033173712',  // replace with your Admob Interstitial ad Unit ID
        request: AdRequest(),
        adLoadCallback:InterstitialAdLoadCallback(
            onAdLoaded: (InterstitialAd ad){
              _interstitialAd = ad;
            },
            onAdFailedToLoad: (LoadAdError error){
             print('InterstitialAd failed to load: $error');
            }),
    );

Ad Event Tracking

To track your ad unit, you can use FullScreenContentCallback, by using which you easily keep track of ads lifecycle, such as when the ad is shown or if user dismissed the ad that is shown.

_interstitialAd!.fullScreenContentCallback = FullScreenContentCallback(

       onAdShowedFullScreenContent: (InterstitialAd ad){
         print("ad onAdshowedFullscreen");
       },
       onAdDismissedFullScreenContent: (InterstitialAd ad){
         print("ad Disposed");
         ad.dispose();
       },
       onAdFailedToShowFullScreenContent: (InterstitialAd ad, AdError aderror){
         print('$ad OnAdFailed $aderror');
         ad.dispose();
         //call reload of the ads
       },
       onAdImpression: (InterstitialAd ad) => print('$ad impression occurred.'),

     );

show interstitial ad to flutter app user

You can choose when to show the ad to the flutter app user, by just calling interstitial.show() method.

_interstitialAd.show();

---

Complete Code on how to show an interstitial ads

AdmobHelper.dart

import 'package:google_mobile_ads/google_mobile_ads.dart';


class AdmobHelper {

  static String get bannerUnit => 'ca-app-pub-3940256099942544/6300978111';

  InterstitialAd? _interstitialAd;

  int num_of_attempt_load = 0;

  static initialization(){
    if(MobileAds.instance == null)
      {
        MobileAds.instance.initialize();
      }
  }
  static BannerAd getBannerAd(){
    BannerAd bAd = new BannerAd(size: AdSize.fullBanner, adUnitId: 'ca-app-pub-3940256099942544/6300978111' , listener: BannerAdListener(
        onAdClosed: (Ad ad){
          print("Ad Closed");
        },
        onAdFailedToLoad: (Ad ad,LoadAdError error){
          ad.dispose();
        },
        onAdLoaded: (Ad ad){
          print('Ad Loaded');
        },
        onAdOpened: (Ad ad){
          print('Ad opened');
        }
    ), request: AdRequest());

    return bAd;
  }

   // create interstitial ads
  void createInterad(){

    InterstitialAd.load(
        adUnitId: 'ca-app-pub-3940256099942544/1033173712',
        request: AdRequest(),
        adLoadCallback:InterstitialAdLoadCallback(
            onAdLoaded: (InterstitialAd ad){
              _interstitialAd = ad;
              num_of_attempt_load =0;
            },
            onAdFailedToLoad: (LoadAdError error){
              num_of_attempt_load +1;
              _interstitialAd = null;

              if(num_of_attempt_load<=2){
                createInterad();
              }
            }),
    );

  }


// show interstitial ads to user
  void showInterad(){
     if(_interstitialAd == null){
       return;
     }

     _interstitialAd!.fullScreenContentCallback = FullScreenContentCallback(

       onAdShowedFullScreenContent: (InterstitialAd ad){
         print("ad onAdshowedFullscreen");
       },
       onAdDismissedFullScreenContent: (InterstitialAd ad){
         print("ad Disposed");
         ad.dispose();
       },
       onAdFailedToShowFullScreenContent: (InterstitialAd ad, AdError aderror){
         print('$ad OnAdFailed $aderror');
         ad.dispose();
         createInterad();
       }
     );

     _interstitialAd!.show();

     _interstitialAd = null;
  }


}

main.dart

import 'dart:math';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_app_simple/AdmobHelper.dart';
import 'package:google_mobile_ads/google_mobile_ads.dart';

void main() {
  WidgetsFlutterBinding.ensureInitialized();
  AdmobHelper.initialization();
  runApp(MyApp());
}

class MyApp extends StatelessWidget  {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Flutter Admob ad example',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomepage(),
    );
  }
}

class MyHomepage extends StatefulWidget {
  @override
  _MyHomepageState createState() => _MyHomepageState();
}

class _MyHomepageState extends State<MyHomepage> {
  late List<String> datas;   // late for null safty
  late List<Object> dataads;  // will store both data + banner ads

AdmobHelper admobHelper = new AdmobHelper();   // object to access methods of AdmobHelper class
  @override
  void initState() {
    // TODO: implement initState
    super.initState();

    datas = [];

    //generate array list of string
    for(int i = 1; i <= 20; i++){
      datas.add("List Item $i");
    }

    dataads = List.from(datas);

    // insert admob banner object in between the array list
    for(int i =0 ; i<=2; i ++){
      var min = 1;
      var rm = new Random();

      //generate a random number from 2 to 18 (+ 1)
      var rannumpos = min + rm.nextInt(18);

      //and add the banner ad to particular index of arraylist
      dataads.insert(rannumpos, AdmobHelper.getBannerAd()..load());

    }

  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: ListView.builder(
          itemCount: dataads.length,
          itemBuilder: (context,index){
            //id dataads[index] is string show listtile with item in it
            if(dataads[index] is String)
              {
                return ListTile(
                  title: Text(dataads[index].toString()),
                  leading: Icon(Icons.exit_to_app),
                  trailing: Icon(Icons.ice_skating),
                  onTap: (){
                    admobHelper.createInterad();   // call create Interstitial ads
                  },
                  onLongPress: (){
                    admobHelper.showInterad();     // call  show Interstitial ads
                  },

                );
              }else{
              // if dataads[index] is object (ads) then show container with adWidget
              final Container adcontent = Container(
                child: AdWidget(
                  ad: dataads[index] as BannerAd,
                  key: UniqueKey(),
                ),
                height: 50,
              );
              return adcontent;
            }

      }),
      bottomNavigationBar: Container(
        child: AdWidget(
          ad:AdmobHelper.getBannerAd()..load(),
          key: UniqueKey(),
        ),
        height: 50,
      ),

    );
  }
}

---

---

RewardedAds in Flutter

Load RewardedAd

To Load an RewardedAd you need to pass some parameters those are adUnitId, an AdRequest(), and an rewardedadLoadCallback:RewardedAdLoadCallback(…..).

Below is an snippet code to load admob Rewarded Ads in flutter

  RewardedAd.load(
        adUnitId: 'ca-app-pub-3940256099942544/5224354917',
        request: AdRequest(),
        rewardedAdLoadCallback: RewardedAdLoadCallback(
          onAdLoaded: (RewardedAd ad) {
            print('$ad loaded.');
            // Keep a reference to the ad so you can show it later.
            this._rewardedAd = ad;
          },
          onAdFailedToLoad: (LoadAdError error) {
            print('RewardedAd failed to load: $error');
          },
        ));

RewardedAd Event Tracking

To track your ad unit, you can use FullScreenContentCallback, by using which you easily keep track of ads lifecycle, such as when the ad is shown or if user dismissed the ad that is shown.

 _rewardedAd.fullScreenContentCallback = FullScreenContentCallback(
      onAdShowedFullScreenContent: (RewardedAd ad) =>
          print('$ad onAdShowedFullScreenContent.'),
      onAdDismissedFullScreenContent: (RewardedAd ad) {
        print('$ad onAdDismissedFullScreenContent.');
        ad.dispose();
      },
      onAdFailedToShowFullScreenContent: (RewardedAd ad, AdError error) {
        print('$ad onAdFailedToShowFullScreenContent: $error');
        ad.dispose();
      },
      onAdImpression: (RewardedAd ad) => print('$ad impression occurred.'),
    );

show Rewarded ad to flutter app user

You can choose when to show the ad to the flutter app user, by just calling _rewardedAd.show().

_rewardedAd.show(
        onUserEarnedReward: (RewardedAd ad, RewardItem rewardItem) {
         // action to reward the app user
    });

---

Complete Code on How to show an Rewarded ads in flutter app

AdmobHelper.dart

import 'package:google_mobile_ads/google_mobile_ads.dart';
import 'package:provider/provider.dart';
import 'package:flutter/foundation.dart';

class AdmobHelper {
  
  RewardedAd _rewardedAd;
  
  static initialization() {
    if (MobileAds.instance == null) {
      MobileAds.instance.initialize();
    }
  }
  void createRewardAd() {
    RewardedAd.load(
        adUnitId: 'ca-app-pub-3940256099942544/5224354917',
        request: AdRequest(),
        rewardedAdLoadCallback: RewardedAdLoadCallback(
          onAdLoaded: (RewardedAd ad) {
            print('$ad loaded.');
            // Keep a reference to the ad so you can show it later.
            this._rewardedAd = ad;
          },
          onAdFailedToLoad: (LoadAdError error) {
            print('RewardedAd failed to load: $error');
          },
        ));
  }

  void showRewardAd() {
    _rewardedAd.show(
        onUserEarnedReward: (RewardedAd ad, RewardItem rewardItem) {
      print("Adds Reward is ${rewardItem.amount}");
     
    });

    _rewardedAd.fullScreenContentCallback = FullScreenContentCallback(
      onAdShowedFullScreenContent: (RewardedAd ad) =>
          print('$ad onAdShowedFullScreenContent.'),
      onAdDismissedFullScreenContent: (RewardedAd ad) {
        print('$ad onAdDismissedFullScreenContent.');
        ad.dispose();
      },
      onAdFailedToShowFullScreenContent: (RewardedAd ad, AdError error) {
        print('$ad onAdFailedToShowFullScreenContent: $error');
        ad.dispose();
      },
      onAdImpression: (RewardedAd ad) => print('$ad impression occurred.'),
    );
  }
}

RewardedAdsExample.dart

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

class RewardAdsExample extends StatelessWidget {
  AdmobHelper admobHelper = new AdmobHelper();
  @override
  Widget build(BuildContext context) {
    
    return Scaffold(
      appBar: AppBar(
        title: Text("Reward Ads Example"),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            ElevatedButton(onPressed: (){admobHelper .createRewardAd();}, child: Text("Load Reward Ads")),
            ElevatedButton(onPressed: (){admobHelper.showRewardAd();}, child: Text("Show Reward ads"))
          ],
        ),
      ),
    );
  }
}

main.dart

import 'dart:math';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_app_simple/AdmobHelper.dart';
import 'package:flutter_app_simple/RewardAdsExample.dart';
import 'package:google_mobile_ads/google_mobile_ads.dart';

void main() {
  WidgetsFlutterBinding.ensureInitialized();
  AdmobHelper.initialization();
  runApp(MyApp());
}

class MyApp extends StatelessWidget  {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Flutter Admob ad example',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: RewardAdsExample(),
    );
  }
}

---

How much does AdMob pay per 1000 impression?

Banner ads will give you very little revenue per 1000 impressions you can only earn about $0.50, but as you all know that google Admob pays only when ads are been clicked. some time with 1000 impression a day you can earn more than $2.00 with almost 5 -10 click( all depends on the location of the ads we clicked), if an app user from the USA clicks on your ads then you can easily earn around $0.30 – $1.00 per ad click, but with another country, it will be less most of the time.

while with native big ads will pay you around $1 dollor per 1000 impression.