flutter 极光推送接收消息

要在 Flutter 中接收极光推送消息，你需要做以下几个步骤：

1.在 `pubspec.yaml` 文件中添加 `jpush_flutter` 的依赖：

dependencies:
  jpush_flutter: ^1.8.6

2.在 `AndroidManifest.xml` 文件中添加必要的权限和配置：

<!-- 添加以下权限 -->
<uses-permission android:name="android.permission.RECEIVE_USER_PRESENT" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

<!-- 添加以下配置 -->
<application>
  <meta-data android:name="JPUSH_CHANNEL" android:value="developer-default" />
  <meta-data android:name="JPUSH_APPKEY" android:value="你的 AppKey" />

  <receiver android:name="cn.jpush.android.service.PushReceiver" android:enabled="true" android:exported="false">
    <intent-filter>
      <action android:name="cn.jpush.android.intent.REGISTRATION" />
      <action android:name="cn.jpush.android.intent.MESSAGE_RECEIVED" />
      <action android:name="cn.jpush.android.intent.NOTIFICATION_RECEIVED" />
      <action android:name="cn.jpush.android.intent.NOTIFICATION_OPENED" />
      <action android:name="cn.jpush.android.intent.ACTION_RICHPUSH_CALLBACK" />
      <category android:name="${applicationId}" />
    </intent-filter>
  </receiver>

  <service android:name="cn.jpush.android.service.DownloadService" android:enabled="true" android:exported="false" />
  <service android:name="cn.jpush.android.service.PushService" android:enabled="true" android:exported="false">
    <intent-filter>
      <action android:name="cn.jpush.android.intent.REGISTER" />
      <action android:name="cn.jpush.android.intent.REPORT" />
      <action android:name="cn.jpush.android.intent.PushService" />
      <action android:name="cn.jpush.android.intent.PUSH_TIME" />
    </intent-filter>
  </service>

  <activity android:name=".MainActivity" android:launchMode="singleTop" android:configChanges="orientation|keyboardHidden|navigation" android:windowSoftInputMode="adjustResize" android:exported="true">
    <intent-filter>
      <action android:name="android.intent.action.VIEW" />
      <category android:name="android.intent.category.DEFAULT" />
      <category android:name="android.intent.category.BROWSABLE" />
      <data android:scheme="你的 scheme" android:host="你的 host" />
    </intent-filter>
  </activity>
</application>

3.在 `AppDelegate` 中设置 iOS 的推送配置：

import 'package:jpush_flutter/jpush_flutter.dart';

class AppDelegate extends NSObject with FlutterAppDelegate {
  final JPush jpush = JPush();

  @override
  bool application(
      UIApplication application, 
      didFinishLaunchingWithOptions launchOptions
  ) {
    jpush.setup(
      appKey: "你的 AppKey",
      channel: "developer-default",
      production: false,
      debug: true,
    );

    jpush.applyPushAuthority(
      notificationSettingsIOS: const NotificationSettingsIOS(
        alert: true,
        badge: true,
        sound: true,
      ),
    );

    return super.application(application, didFinishLaunchingWithOptions: launchOptions);
  }
}

4.在需要接收推送消息的页面中监听消息：

import 'package:jpush_flutter/jpush_flutter.dart';

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key key}) : super(key: key);

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

class _MyHomePageState extends State<MyHomePage> {
  final JPush jpush = JPush();

  @override
  void initState() {
    super.initState();
    jpush.addEventHandler(
      onReceiveNotification: (Map<String, dynamic> message) async {
        print("接收到推送消息：$message");
      },
    );
  }

  @override
  void dispose() {
    jpush.removeEventHandler();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('极光推送 Demo'),
      ),
      body: Center(
        child: const Text('这是一个极光推送 Demo'),
      ),
    );
  }
}

以上就是在 Flutter 中接收极光推送消息的基本步骤，具体实现还需要根据自己的需求进行调整。