A plugin for Flutter that supports loading and displaying banner, interstitial (full-screen), and rewarded video ads using the Firebase AdMob API.
Warning: This plugin is still under development, some AdMob features are not available yet and testing has been limited. Feedback and Pull Requests are welcome.
Before any other methods are invoked, the plugin must be initialized with an AdMob App ID:
FirebaseAdMob.instance.initialize(appId: appId);
Banner and interstitial ads must be created with an AdMob ad unit ID, and they can include targeting information:
MobileAdTargetingInfo targetingInfo = new MobileAdTargetingInfo(
keywords: <String>['foo', 'bar'],
contentUrl: 'http://foo.com/bar.html',
birthday: new DateTime.now(),
childDirected: true,
gender: "male", // or "female", "unknown"
);
BannerAd myBanner = new BannerAd(
adUnitId: myBannerAdUnitId,
targetingInfo: targetingInfo,
);
InterstitialAd myInterstitial = new InterstitialAd(
adUnitId: myInterstitalAdUnitId,
targetingInfo: targetingInfo,
);
Ads must be loaded before they're shown.
myBanner
..load() // typically this happens well before the ad is shown
..show(anchorOffset: 60.0, anchorType: AnchorType.bottom);
// Positions the banner ad 60 pixels from the bottom of the screen
// InterstitialAds are loaded and shown in the same way
BannerAd
and InterstitialAd
objects can be disposed to free up plugin
resources. Disposing a banner ad that's been shown removes it from the screen.
Interstitial ads, however, can't be programmatically removed from view.
Banner and interstitial ads can be created with a MobileAdEvent
listener. The
listener can be used to detect when the ad has actually finished loading
(or failed to load at all).
Unlike banners and interstitials, rewarded video ads are loaded one at a time
via a singleton object, RewardedVideoAd.instance
. Its load
method takes an
AdMob ad unit ID and an instance of MobileAdTargetingInfo
:
RewardedVideoAd.instance.load(myAdMobAdUnitId, targetingInfo);
To listen for events in the rewarded video ad lifecycle, apps can define a
function matching the RewardedVideoAdListener
typedef, and assign it to the
listener
instance variable in RewardedVideoAd
. If set, the listener
function will be invoked whenever one of the events in the RewardedVideAdEvent
enum occurs. After a rewarded video ad loads, for example, the
RewardedVideoAdEvent.loaded
is sent. Any time after that, apps can show the ad
by calling show
:
RewardedVideoAd.instance.show();
When the AdMob SDK decides it's time to grant an in-app reward, it does so via
the RewardedVideoAdEvent.rewarded
event:
RewardedVideoAd.instance.listener =
(RewardedVideoAdEvent event, [String rewardType, int rewardAmount]) {
if (event == RewardedVideoAdEvent.rewarded) {
setState(() {
// Here, apps should update state to reflect the reward.
_goldCoins += rewardAmount;
});
}
};
Because RewardedVideoAd
is a singleton object, it does not offer a dispose
method.
This is just an initial version of the plugin. There are still some limitations:
- Banner ads have limited positioning functionality. They can be positioned at the top or the bottom of the screen and at a logical pixel offset from the edge.
- Banner ads cannot be animated into view.
- It's not possible to specify a banner ad's size.
- There's no support for native ads.
- The existing tests are fairly rudimentary.
- There is no API doc.
- The example should demonstrate how to show gate a route push with an interstitial ad
For Flutter plugins for other Firebase products, see FlutterFire.md.