Flutter应用终止时点击通知如何弹出对话框？

一、didNotificationLaunchApp始终返回false的常见原因 #

• 插件初始化顺序错误：如果在flutterLocalNotificationsPlugin.initialize()完成前就调用getNotificationAppLaunchDetails()，会导致didNotificationLaunchApp返回false。
• FCM消息类型问题：若通过FCM控制台发送的是纯notification类型消息（而非data消息），flutter_local_notifications无法将其识别为自身触发的启动事件。
• 平台配置缺失：Android未配置FLUTTER_NOTIFICATION_CLICK的intent filter，iOS未开启远程通知后台模式，导致插件无法捕获启动来源。

二、可行的解决方法 #

方法1：结合FCM原生API处理应用终止启动场景

FCM提供的getInitialMessage()方法，专门用于获取应用终止状态下点击通知启动的消息，可靠性更高，步骤如下：

1. 全局NavigatorKey配置：确保启动时能获取到可用的Context

final GlobalKey<NavigatorState> navigatorKey = GlobalKey<NavigatorState>();

2. 启动时检查初始消息：在main()中初始化Firebase后立即执行检查

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();

  // 检查是否由FCM通知启动应用
  RemoteMessage? initialMessage = await FirebaseMessaging.instance.getInitialMessage();
  if (initialMessage != null) {
    // 延迟执行弹窗，确保Context已就绪
    WidgetsBinding.instance.addPostFrameCallback((_) {
      showDialog(
        context: navigatorKey.currentContext!,
        builder: (_) => AlertDialog(
          title: Text(initialMessage.notification?.title ?? "通知"),
          content: Text(initialMessage.notification?.body ?? ""),
          actions: [
            TextButton(
              onPressed: () => Navigator.pop(_),
              child: const Text("确定"),
            )
          ],
        ),
      );
    });
  }

  // 初始化flutter_local_notifications（保持原有逻辑）
  await initLocalNotifications();
  runApp(MyApp(navigatorKey: navigatorKey));
}

3. 平台配置补充
   • Android：在AndroidManifest.xml的MainActivity标签内添加intent filter：

     <intent-filter>
       <action android:name="FLUTTER_NOTIFICATION_CLICK" />
       <category android:name="android.intent.category.DEFAULT" />
     </intent-filter>
     

   • iOS：在Info.plist中开启远程通知后台模式：

     <key>UIBackgroundModes</key>
     <array>
       <string>remote-notification</string>
     </array>
     

方法2：修复flutter_local_notifications的didNotificationLaunchApp逻辑

若要继续使用插件的方法，需确保以下两点：

1. 正确的初始化顺序：必须在插件初始化完成后再调用getNotificationAppLaunchDetails()

Future<void> initLocalNotifications() async {
  const AndroidInitializationSettings androidSettings =
      AndroidInitializationSettings('@mipmap/ic_launcher');
  const DarwinInitializationSettings iosSettings = DarwinInitializationSettings();
  const InitializationSettings settings = InitializationSettings(
    android: androidSettings,
    iOS: iosSettings,
  );

  // 先完成初始化
  await flutterLocalNotificationsPlugin.initialize(settings,
      onDidReceiveNotificationResponse: (response) {
    // 前台/后台点击通知的处理逻辑
    showDialog(...);
  });

  // 再检查启动来源
  final NotificationAppLaunchDetails? launchDetails =
      await flutterLocalNotificationsPlugin.getNotificationAppLaunchDetails();
  if (launchDetails?.didNotificationLaunchApp ?? false) {
    // 处理启动时的通知点击
    showDialog(
      context: navigatorKey.currentContext!,
      builder: (_) => AlertDialog(...),
    );
  }
}

2. 发送FCM数据消息：需发送包含data字段的消息，而非纯notification消息，示例payload：

{
  "to": "DEVICE_TOKEN",
  "data": {
    "id": "1",
    "title": "测试通知",
    "body": "点击查看详情",
    "click_action": "FLUTTER_NOTIFICATION_CLICK"
  }
}

内容的提问来源于stack exchange，提问作者yazicifatihcan