我正在尝试在我的 flutter 项目中使用“google_mobile_ads”，但我正在将其迁移到嵌入 v2 的 Android

Question

The plugin google_mobile_ads requires your app to be migrated to the Android embedding v2. Follow the steps on https://flutter.dev/go/android-project-migration and re-run this command.

So I tried following the steps but I couldn't found the "MainActivity.java" in my project anyWhere and couldn't follow along

MyProject tree

migration error

https://flutter.dev/go/android-project-migration this the Link Which it is suggesting to follow

Answer 1

just open this files in your project and copy >> paste this lines of code and it will work.......make sure to delete all lines of code in your this files and replace it to this new ones.

1: MainActivity.java

---

package co.appbrewery.flash_chat;

import io.flutter.embedding.android.FlutterActivity;

public class MainActivity extends FlutterActivity {
  
}

---

2: styles.xml

---

<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
    <item name="android:windowBackground">@drawable/launch_background</item>
</style>
</resources>

---

3: AndroidManifest.xml

---

<manifest xmlns:android="http://schemas.android.com/apk/res/android"   
          package="co.appbrewery.flash_chat">  
<!-- io.flutter.app.FlutterApplication is an android.app.Application that
     calls FlutterMain.startInitialization(this); in its onCreate method.
     In most cases you can leave this as-is, but you if you want to provide
     additional functionality it is fine to subclass or reimplement
     FlutterApplication and put your custom class here. -->
<application android:label="flash_chat" android:icon="@mipmap/ic_launcher">
    <activity android:name=".MainActivity" android:launchMode="singleTop" android:theme="@style/LaunchTheme" android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode" android:hardwareAccelerated="true" android:windowSoftInputMode="adjustResize">
        <!-- This keeps the window background of the activity showing
              until Flutter renders its first frame. It can be removed if
              there is no splash screen (such as the default splash screen
              defined in @style/LaunchTheme). -->
        <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"/>
        </intent-filter>
    </activity>
    <meta-data android:name="flutterEmbedding" android:value="2" />
</application>
</manifest>

---