Flutter广告集成插件flutter_applovin_max的使用

当然，下面是一个关于如何在Flutter项目中集成和使用flutter_applovin_max插件的示例代码。这个插件允许你在Flutter应用中集成Applovin Max广告。

步骤 1: 添加依赖

首先，在你的pubspec.yaml文件中添加flutter_applovin_max依赖：

dependencies:
  flutter:
    sdk: flutter
  flutter_applovin_max: ^latest_version  # 请替换为最新的版本号

然后运行flutter pub get来安装依赖。

步骤 2: 配置Android和iOS项目

Android

1. 在android/app/src/main/AndroidManifest.xml中添加必要的权限：

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

1. 在android/app/build.gradle文件中添加以下内容以配置AppLovin SDK：

android {
    ...
    defaultConfig {
        ...
        manifestPlaceholders = [
                applovinSdkKey    : "YOUR_APPLOVIN_SDK_KEY",  // 替换为你的AppLovin SDK Key
                applovinAdUnitIds: "[\"YOUR_INTERSTITIAL_AD_UNIT_ID\", \"YOUR_BANNER_AD_UNIT_ID\"]"  // 替换为你的广告单元ID
        ]
    }
}

iOS

1. 在ios/Runner/Info.plist中添加必要的配置：

<key>NSAppTransportSecurity</key>
<dict>
    <key>NSAllowsArbitraryLoads</key>
    <true/>
</dict>

1. 在ios/Podfile中添加以下内容以确保使用正确的AppLovin SDK版本：

platform :ios, '10.0'

# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
ENV['COCOAPODS_DISABLE_STATS'] = 'true'

project 'Runner', {
  'Debug': :debug,
  'Profile': :release,
  'Release': :release,
}

def flutter_root
  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), __FILE__)
  unless File.exist?(generated_xcode_build_settings_path)
    raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure flutter pub get is executed first"
  end

  File.foreach(generated_xcode_build_settings_path) do |line|
    matches = line.match(/FLUTTER_ROOT\=(.*)/)
    return File.expand_path(matches[1], __FILE__) if matches
  end
  raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try running flutter pub get in your flutter project."
end

require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)

flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))

1. 在Xcode中，打开Runner项目，确保在Info.plist中配置了AppLovinSdkKey和AppLovinAdUnitIds。

步骤 3: 初始化并使用插件

在你的Flutter应用中，你可以这样初始化并使用flutter_applovin_max插件：

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

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Flutter AppLovin Max Example'),
        ),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              ElevatedButton(
                onPressed: () {
                  _showInterstitialAd();
                },
                child: Text('Show Interstitial Ad'),
              ),
              SizedBox(height: 20),
              BannerAdWidget(
                adUnitId: 'YOUR_BANNER_AD_UNIT_ID', // 替换为你的Banner广告单元ID
              ),
            ],
          ),
        ),
      ),
    );
  }

  void _showInterstitialAd() {
    FlutterApplovinMax.initialize(
      sdkKey: 'YOUR_APPLOVIN_SDK_KEY', // 替换为你的AppLovin SDK Key
      testAdsEnabled: true, // 在开发阶段设置为true，发布时设置为false
    ).then((_) {
      FlutterApplovinMax.loadInterstitialAd(
        adUnitId: 'YOUR_INTERSTITIAL_AD_UNIT_ID', // 替换为你的Interstitial广告单元ID
      ).then((_) {
        FlutterApplovinMax.showInterstitialAd().catchError((error) {
          print('Failed to show interstitial ad: $error');
        });
      }).catchError((error) {
        print('Failed to load interstitial ad: $error');
      });
    }).catchError((error) {
      print('Failed to initialize SDK: $error');
    });
  }
}

class BannerAdWidget extends StatefulWidget {
  final String adUnitId;

  BannerAdWidget({required this.adUnitId});

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

class _BannerAdWidgetState extends State<BannerAdWidget> {
  BannerAd? _bannerAd;

  @override
  void initState() {
    super.initState();
    _loadBannerAd();
  }

  void _loadBannerAd() {
    FlutterApplovinMax.loadBannerAd(
      adUnitId: widget.adUnitId,
      size: AdSize.banner, // 或者其他尺寸如AdSize.largeBanner, AdSize.mediumRectangle等
    ).then((bannerAd) {
      setState(() {
        _bannerAd = bannerAd;
      });
    }).catchError((error) {
      print('Failed to load banner ad: $error');
    });
  }

  @override
  Widget build(BuildContext context) {
    return _bannerAd != null
        ? Container(
            child: AdWidget(ad: _bannerAd!),
            height: AdSize.banner.height, // 根据你选择的尺寸调整高度
          )
        : Container();
  }

  @override
  void dispose() {
    _bannerAd?.dispose();
    super.dispose();
  }
}

以上代码展示了如何初始化AppLovin Max SDK，加载并显示Interstitial广告和Banner广告。请确保替换YOUR_APPLOVIN_SDK_KEY、YOUR_INTERSTITIAL_AD_UNIT_ID和YOUR_BANNER_AD_UNIT_ID为你的实际值。

这个示例应该能帮助你在Flutter项目中集成并使用flutter_applovin_max插件。