flutter firebase_admob 패키지 적용

1.패키지 추가

pubspec.yaml dependencies에 firebase_admob: 0.10.3 패키지 추가

2.AndroidManifest.xml 설정

<meta-data
    android:name="com.google.android.gms.ads.APPLICATION_ID"
    android:value="ca-app-pub-#############~#########" /> 추가

3.info.plist 설정

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

4.코드추가

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

FirebaseAdmobDemoState pageState;

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    pageState = FirebaseAdmobDemoState();
    return pageState;
  }
}

class FirebaseAdmobDemoState extends State<MyApp> {
  FirebaseAdmobManager fMan = FirebaseAdmobManager();
  bool loadInterstitialAd = false;
  bool loadRewardedVideoAd = false;
  int rewardCount = 0;

  @override
  void initState() {
    super.initState();
    fMan.init(
        interstitialAdListener: interstitialAdListener,
        rewardedVideoListner: rewardedVideoListner);
  }

  void interstitialAdListener(MobileAdEvent event) {
    print("************ event: $event");
    switch (event) {
      case MobileAdEvent.loaded:
        setState(() {
          loadInterstitialAd = true;
        });
        break;
      case MobileAdEvent.failedToLoad:
        break;
      case MobileAdEvent.clicked:
        break;
      case MobileAdEvent.impression:
        break;
      case MobileAdEvent.opened:
        setState(() {
          loadInterstitialAd = false;
        });
        break;
      case MobileAdEvent.leftApplication:
        break;
      case MobileAdEvent.closed:
        break;
    }
  }

  void rewardedVideoListner(RewardedVideoAdEvent event,
      {String rewardType, int rewardAmount}) {
    print("************ event: $event");
    switch (event) {
      case RewardedVideoAdEvent.loaded:
        setState(() {
          loadRewardedVideoAd = true;
        });
        break;
      case RewardedVideoAdEvent.failedToLoad:
        break;
      case RewardedVideoAdEvent.opened:
        setState(() {
          loadRewardedVideoAd = false;
        });
        break;
      case RewardedVideoAdEvent.leftApplication:
        break;
      case RewardedVideoAdEvent.closed:
        break;
      case RewardedVideoAdEvent.rewarded:
        setState(() {
          rewardCount += rewardAmount;
        });
        break;
      case RewardedVideoAdEvent.started:
        break;
      case RewardedVideoAdEvent.completed:
        break;
    }
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('AdMob Plugin example app'),
        ),
        body: ListView(
          children: <Widget>[
            _customTitle("Bottom Banner Advertisement"),
            Row(
              children: <Widget>[
                _customButton("Show", onPressed: () {
                  fMan.showBannerAd();
                }),
                _customButton("Move to\nOther Page", onPressed: () {
                  Navigator.push(context,
                      MaterialPageRoute(builder: (context) => TestPage()));
                }),
                _customButton("Remove", onPressed: () {
                  fMan.removeBannerAd();
                })
              ],
            ),
            _customTitle("Interstitial Advertisement"),
            Row(
              children: <Widget>[
                _customButton(("Load"), onPressed: () {
                  fMan.loadInterstitialAd();
                }),
                _customButton("Show",
                    onPressed: (loadInterstitialAd == true)
                        ? () {
                      fMan.showInterstitialAd();
                    }
                        : null),
              ],
            ),
            _customTitle("Rewarded Video Advertisement"),
            Row(
              children: <Widget>[
                _customButton(("Load"), onPressed: () {
                  fMan.loadRewardedVideoAd();
                }),
                _customButton("Show",
                    onPressed: (loadRewardedVideoAd == true)
                        ? () {
                      fMan.showRewardedVideoAd();
                    }
                        : null),
              ],
            ),
            Container(
              alignment: Alignment(0, 0),
              padding: const EdgeInsets.symmetric(vertical: 10),
              child: Text("You have $rewardCount coins."),
            ),
          ],
        ),
      ),
    );
  }

  _customTitle(String title) {
    return Container(
      margin: const EdgeInsets.symmetric(horizontal: 10),
      padding: const EdgeInsets.only(top: 20),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: <Widget>[
          Text(
            title,
            style: TextStyle(
                fontSize: 16,
                fontWeight: FontWeight.bold,
                color: Colors.blueGrey),
          ),
          Divider(
            color: Colors.grey,
            height: 1,
          )
        ],
      ),
    );
  }

  _customButton(String text, {Null Function() onPressed}) {
    return Expanded(
      child: Container(
        margin: const EdgeInsets.symmetric(horizontal: 5),
        child: RaisedButton(
          padding: const EdgeInsets.symmetric(horizontal: 10),
          color: Colors.blueAccent,
          textColor: Colors.white,
          child: Text(text),
          onPressed: onPressed,
        ),
      ),
    );
  }
}

class FirebaseAdmobManager {
  bool _isInit = false;
  BannerAd _bottomBannerAd;
  InterstitialAd interstitialAd;

//Modify the following for the actual Admob advertisement.
  String appID = FirebaseAdMob.testAppId;
  String bannerID = BannerAd.testAdUnitId;
  String interstitialID = InterstitialAd.testAdUnitId;
  String rewardedVideoAdID = RewardedVideoAd.testAdUnitId;

  Function(MobileAdEvent) _interstitialAdListener;

  init({
    MobileAdListener interstitialAdListener = null,
    RewardedVideoAdListener rewardedVideoListner = null,
  }) async {
    _isInit = await FirebaseAdMob.instance.initialize(appId: appID);

    _bottomBannerAd = createBannerAd();

    _interstitialAdListener = interstitialAdListener;
    RewardedVideoAd.instance.listener = rewardedVideoListner;
  }

  dispose() {
    _bottomBannerAd.dispose();
    interstitialAd.dispose();
    _isInit = false;
  }

  static const MobileAdTargetingInfo targetingInfo = MobileAdTargetingInfo(
//testDevices: testDevice != null ? <String>[testDevice] : null,
    keywords: <String>['foo', 'bar'],
    contentUrl: 'http://foo.com/bar.html',
    childDirected: true,
    nonPersonalizedAds: true,
  );

  /*** Banner AD ***/
  BannerAd createBannerAd() {
    return BannerAd(
      adUnitId: BannerAd.testAdUnitId,
      size: AdSize.banner,
//targetingInfo: targetingInfo,
      listener: (MobileAdEvent event) {
        print("BannerAd event $event");
      },
    );
  }

  showBannerAd() {
    _bottomBannerAd ??= createBannerAd();
    _bottomBannerAd
      ..load()
      ..show();
  }

  removeBannerAd() {
    _bottomBannerAd?.dispose();
    _bottomBannerAd = null;
  }

  /*** Interstitial AD ***/
  InterstitialAd createInterstitialAd() {
    return InterstitialAd(
      adUnitId: InterstitialAd.testAdUnitId,
      listener: _interstitialAdListener,
    );
  }

  loadInterstitialAd() async {
    interstitialAd?.dispose();
    interstitialAd = createInterstitialAd()..load();
  }

  showInterstitialAd() {
    interstitialAd.show();
  }

  /*** RewardedVideo AD ***/
  loadRewardedVideoAd() {
    RewardedVideoAd.instance
        .load(adUnitId: rewardedVideoAdID, targetingInfo: targetingInfo);
  }

  showRewardedVideoAd() {
    RewardedVideoAd.instance.show();
  }
}

class TestPage extends StatefulWidget {
  @override
  TestPageState createState() => TestPageState();
}

class TestPageState extends State<TestPage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("Test")),
      body: Center(
        child: Text("Test"),
      ),
    );
  }
}