Flutter - Firebase Admob

 Firebase

build.gradle

classpath 'com.google.gms:google-services:4.3.4'

app>src>build.gradle

apply plugin: 'com.google.gms.google-services'

implementation platform('com.google.firebase:firebase-bom:25.12.0')

implementation 'com.google.firebase:firebase-analytics' 

                                                                                                                                                     

Admob-Android

app>src>main>AndroidManifest.xml

<application
    android:name="io.flutter.app.FlutterApplication"
    android:label="keys"
    android:icon="@mipmap/ic_launcher">
    <meta-data
        android:name="com.google.android.gms.ads.APPLICATION_ID"
        android:value="ca-app-pub-6080925650058329~5412407969"/>

☝<meta-data

android:name..../>

must under the <application>

and out of </activity>

Admob-iOS

<key>GADApplicationIdentifier</key>
<string>ca-app-pub-6080925650058329~8198353404</string>
<key>io.flutter.embedded_views_preview</key>
<true/>
<key>NSUserTrackingUsageDescription</key>
<string>This identifier will be used to deliver personalized ads to you.</string>

                                                                                                                                                     

Android.dart admob part

static const MobileAdTargetingInfo targetingInfo = MobileAdTargetingInfo(
  keywords: <String>['flutterio', 'beautiful apps'],
  contentUrl: 'https://flutter.io',
  childDirected: false,
  testDevices: <String>[], // Android emulators are considered test devices
);

BannerAd myBanner = BannerAd(
  adUnitId: 'ca-app-pub-6080925650058329/7080712856',
  size: AdSize.smartBanner,
  targetingInfo: targetingInfo,
  listener: (MobileAdEvent event) {
    print("BannerAd event is $event");
  },
);

InterstitialAd myInterstitial = InterstitialAd(
  adUnitId: 'ca-app-pub-6080925650058329/3600115928',
  targetingInfo: targetingInfo,
  listener: (MobileAdEvent event) {
    print("InterstitialAd event is $event");
  },
);
@override
void initState() {
  super.initState();
  FirebaseAdMob.instance
      .initialize(appId: 'ca-app-pub-6080925650058329~5412407969');
  myBanner
    ..load()
    ..show(
      anchorOffset: 60.0,
      horizontalCenterOffset: 10.0,
      anchorType: AnchorType.bottom,
    );
  myInterstitial
    ..load()
    ..show(
      anchorType: AnchorType.bottom,
      anchorOffset: 0.0,
      horizontalCenterOffset: 0.0,
    );
}

iOS + Android.dart admob part

static const MobileAdTargetingInfo targetingInfo = MobileAdTargetingInfo(
  keywords: <String>['flutterio', 'beautiful apps'],
  contentUrl: 'https://flutter.io',
  childDirected: false,
  testDevices: <String>[], // Android emulators are considered test devices
);

BannerAd myBanner = BannerAd(
  adUnitId: Platform.isAndroid
      ? 'ca-app-pub-6080925650058329/7080712856'
      : 'ca-app-pub-6080925650058329/2754455039',
  size: AdSize.smartBanner,
  targetingInfo: targetingInfo,
  listener: (MobileAdEvent event) {
    print("BannerAd event is $event");
  },
);

InterstitialAd myInterstitial = InterstitialAd(
  adUnitId: Platform.isAndroid
      ? 'ca-app-pub-6080925650058329/3600115928'
      : 'ca-app-pub-6080925650058329/7954810821',
  targetingInfo: targetingInfo,
  listener: (MobileAdEvent event) {
    print("InterstitialAd event is $event");
  },
);
@override
void initState() {
  super.initState();
  FirebaseAdMob.instance.initialize(
      appId: Platform.isAndroid
          ? 'ca-app-pub-6080925650058329~5412407969'
          : 'ca-app-pub-6080925650058329~8198353404');
  myBanner
    ..load()
    ..show(
      anchorOffset: 60.0,
      horizontalCenterOffset: 10.0,
      anchorType: AnchorType.bottom,
    );
  myInterstitial
    ..load()
    ..show(
      anchorType: AnchorType.bottom,
      anchorOffset: 0.0,
      horizontalCenterOffset: 0.0,
    );
}