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我有一个版本为 2.2.3 的 Flutter 应用程序，我最近使用平台通道方法将本机 SDK 集成到该应用程序中。出于某种原因，当我在模拟器或实际设备上运行时，我的 Flutter 应用程序开始显示黑屏。该应用程序卡在黑屏上，无法继续显示主屏幕。这是我的主文件代码：

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  InAppPurchaseAndroidPlatformAddition.enablePendingPurchases();

  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  final Future<FirebaseApp> _initialization = Firebase.initializeApp();

  @override
  Widget build(BuildContext context) {
    SystemChrome.setEnabledSystemUIOverlays([]);
    SystemChrome.setPreferredOrientations(
        [DeviceOrientation.portraitUp, DeviceOrientation.portraitDown]);
    print('Inside main.dart build method');
    return FutureBuilder(
        future: _initialization,
        builder: (context2, snapshot) {
          if (snapshot.hasError) {
            NetworkErr();
            return Container();
          } else if (snapshot.connectionState == ConnectionState.done) {
            return MultiProvider(
              providers: [
                ChangeNotifierProvider(
                  create: (ctx) => ClueList(),
                ),
                ChangeNotifierProvider(
                  create: (ctx) => Score(),
                ),
                ChangeNotifierProvider(
                  create: (ctx) => Auth(),
                ),
                ChangeNotifierProvider(
                  create: (ctx) => Badges(),
                ),
              ],
              child: MaterialApp(
                theme: ThemeData(
                    primarySwatch: Colors.teal,
                    // primaryColor: Color.fromARGB(150, 35, 152, 159,),
                    primaryColorLight: Color.fromARGB(
                      80,
                      35,
                      152,
                      159,
                    ),
                    accentColor: Color.fromARGB(255, 255, 185, 36),
                    textTheme: ThemeData.light().textTheme.copyWith(
                            bodyText2: TextStyle(
                          fontFamily: 'Happy School',
                          fontSize: 20,
                        ))),
                home: HomeScreen(),

在 MainActivity.java 文件中，我集成了本机 sdk，我在其中调用以从 Yodo1 MAS 检索广告 下面是 MainActivity.java 文件中的代码。

package com.example.xxxxx;

import android.content.Intent;
import android.os.Bundle;

import androidx.annotation.NonNull;

import com.yodo1.mas.Yodo1Mas;
import com.yodo1.mas.error.Yodo1MasError;
import com.yodo1.mas.event.Yodo1MasAdEvent;

import io.flutter.app.FlutterActivity;
import io.flutter.embedding.engine.FlutterEngine;
import io.flutter.plugin.common.MethodCall;
import io.flutter.plugin.common.MethodCall;
import io.flutter.plugin.common.MethodChannel;
import io.flutter.plugin.common.MethodChannel.Result;
import io.flutter.plugin.common.MethodChannel.MethodCallHandler;
import io.flutter.plugins.GeneratedPluginRegistrant;

public class MainActivity extends FlutterActivity {

   @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        System.out.println("before Calling MAS Get Instance");

        Yodo1Mas.getInstance().init(this, "xxxxxxxxx", new Yodo1Mas.InitListener() {
            @Override
            public void onMasInitSuccessful() {
             System.out.println("MAS Init Successful");

            }

            @Override
            public void onMasInitFailed(@NonNull Yodo1MasError error) {

            }
        });
        new MethodChannel(getFlutterView(), "com.examples.xxxxxx/yodo1").setMethodCallHandler(
            new MethodCallHandler() {
                @Override
                public void onMethodCall(MethodCall call, Result result) {
                    if (call.method.equals("getBannerAd")) {
                        System.out.println("RADHA LOading Banner Ad");
                        getBannerAd();

                    }
                }
            }
        );
        
    }

    private void getBannerAd() {

        int align = Yodo1Mas.BannerTop | Yodo1Mas.BannerHorizontalCenter;

        boolean isLoaded = Yodo1Mas.getInstance().isBannerAdLoaded();
        
            if (isLoaded) {
            Yodo1Mas.getInstance().showBannerAd(MainActivity.this, align);
            Yodo1Mas.getInstance().setBannerListener(new Yodo1Mas.BannerListener() {
            @Override
            public void onAdOpened(@NonNull Yodo1MasAdEvent event) {
            }

            @Override
            public void onAdError(@NonNull Yodo1MasAdEvent event, @NonNull Yodo1MasError error) {

            }

            @Override
            public void onAdClosed(@NonNull Yodo1MasAdEvent event) {

            }
        }    
        );
    }
    }
}

这是我的 AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.xxxxx">
    
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.QUERY_ALL_PACKAGES"/>
    <uses-permission android:name="com.android.vending.BILLING" />    

    <application
        android:name="io.flutter.app.FlutterApplication"
        android:icon="@mipmap/ic_launcher"
        android:usesCleartextTraffic="false"
        android:networkSecurityConfig="@xml/network_security_config">
        <activity
            android:name=".MainActivity"
            android:launchMode="singleTop"
            android:theme="@style/LaunchTheme"
            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
            android:hardwareAccelerated="true"
            android:windowSoftInputMode="adjustResize">
           
                         
  
            <meta-data
              android:name="io.flutter.embedding.android.NormalTheme"
              android:resource="@style/NormalTheme"
              />
          
            <meta-data
              android:name="io.flutter.embedding.android.SplashScreenDrawable"
              android:resource="@drawable/launch_background"
              />
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
                <action android:name="FLUTTER_NOTIFICATION_CLICK" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <!-- Don't delete the meta-data below.
             This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
        <meta-data
            android:name="flutterEmbedding"
            android:value="2" />
        <meta-data
            android:name="com.google.android.gms.ads.APPLICATION_ID"
            android:value="ca-app-pub-xxxxxxxxxxxxxxxxxxxxxxxxxx"/> 
       
            <!-- <meta-data
            android:name="com.google.android.gms.games.APP_ID"
            android:value="@string/app_id" /> -->
        <!-- <meta-data
            android:name="com.google.android.gms.version"
            android:value="@integer/google_play_services_version" /> -->
    </application>
</manifest>

我还尝试了以下方法：

  1. 我跑了flutter pub cache repair
  2. 我最初的项目是 Flutter + Kotlin 项目。由于集成本机 sdk 的代码仅在 Java 中可用，因此我通过将文件夹结构从 src/main/kotlin 移动到 src/main/java 将项目转换为 Java 项目，如下所述： Convert an existing Flutter Kotlin project to颤振Java项目

我已经坚持了3天多了。我搜索了几乎所有在 SOF 上找到的黑屏解决方案，但无济于事。如果您有任何其他建议，请告诉我。谢谢。

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