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more information
the flutter casual games toolkit includes the following templates:
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add ads to your mobile flutter app or game
many developers use advertising to monetize their mobile apps and games.
this allows their app to be downloaded free of charge,
which improves the app’s popularity.
to add ads to your flutter project, use
AdMob,
google’s mobile advertising platform.
this recipe demonstrates how to use the
google_mobile_ads
package to add a banner ad to your app or game.
info note
apart from AdMob, the google_mobile_ads package also supports
ad manager, a platform intended for large publishers. integrating ad
manager resembles integrating AdMob, but it won’t be covered in this
cookbook recipe. to use ad manager, follow the
ad manager documentation.
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1. get AdMob app IDs
go to AdMob and set up an
account. this could take some time because you need to provide
banking information, sign contracts, and so on.
with the AdMob account ready, create two apps in AdMob: one for
android and one for iOS.
open the app settings section.
get the AdMob app IDs for both the android app and the iOS app.
they resemble ca-app-pub-1234567890123456~1234567890. note the
tilde (~) between the two numbers.
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2. platform-specific setup
update your android and iOS configurations to include your app IDs.
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android
add your AdMob app ID to your android app.
open the app’s android/app/src/main/AndroidManifest.xml file.
add a new <meta-data> tag.
set the android:name element with a value of
com.google.android.gms.ads.APPLICATION_ID.
set the android:value element with the value to your own AdMob app
ID that you got in the previous step.
include them in quotes as shown:
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iOS
add your AdMob app ID to your iOS app.
open your app’s ios/Runner/Info.plist file.
enclose GADApplicationIdentifier with a key tag.
enclose your AdMob app ID with a string tag. you created this AdMob
app ID in step 1.
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3. add the google_mobile_ads plugin
to add the google_mobile_ads plugin as a dependency, run
flutter pub add:
info note
once you add the plugin, your android app might fail to build with a
DexArchiveMergerException:
to resolve this, execute the flutter run command in the terminal, not
through an IDE plugin. the flutter tool can detect the issue and ask
whether it should try to solve it. answer y, and the problem goes away.
you can return to running your app from an IDE after that.
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4. initialize the mobile ads SDK
you need to initialize the mobile ads SDK before loading ads.
call MobileAds.instance.initialize() to initialize the mobile ads
SDK.
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void main() async {
WidgetsFlutterBinding.ensureInitialized();
unawaited(MobileAds.instance.initialize());
runApp(MyApp());
}
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run the initialization step at startup, as shown above,
so that the AdMob SDK has enough time to initialize before it is needed.
info note
MobileAds.instance.initialize() returns a future but, the
way the SDK is built, you don’t need to await it.
if you try to load an ad before that future is completed,
the SDK will gracefully wait until the initialization, and then load the ad.
you can await the future
if you want to know the exact time when the AdMob SDK is ready.
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5. load a banner ad
to show an ad, you need to request it from AdMob.
to load a banner ad, construct a BannerAd instance, and
call load() on it.
info note
the following code snippet refers to fields such a adSize, adUnitId
and _bannerAd. this will all make more sense in a later step.