Flutter点击文本按钮触发本地推送通知时出现报错求助

问题情况 #

点击按钮触发本地推送通知时出现报错，已尝试重装应用、多次重启，搜索解决方案后仍无法修复。

报错日志 #

E/flutter ( 8853):  at android.os.Handler.handleCallback(Handler.java:938)
E/flutter ( 8853):  at android.os.Handler.dispatchMessage(Handler.java:99)
E/flutter ( 8853):  at android.os.Looper.loop(Looper.java:223)
E/flutter ( 8853):  at android.app.ActivityThread.main(ActivityThread.java:7656)
E/flutter ( 8853):  at java.lang.reflect.Method.invoke(Native Method)
E/flutter ( 8853):  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
E/flutter ( 8853):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
E/flutter ( 8853): )
E/flutter ( 8853): #0      StandardMethodCodec.decodeEnvelope
package:flutter/…/services/message_codecs.dart:653
E/flutter ( 8853): #1      MethodChannel._invokeMethod
package:flutter/…/services/platform_channel.dart:296
E/flutter ( 8853): <asynchronous suspension>
E/flutter ( 8853): #2      FlutterLocalNotificationsPlugin.show
package:flutter_local_notifications/src/flutter_local_notifications_plugin.dart:234
E/flutter ( 8853): <asynchronous suspension>

相关代码 #

import 'package:flutter_local_notifications/flutter_local_notifications.dart';

class NotificationApi {
  static final _notification = FlutterLocalNotificationsPlugin();

  static Future _notificationDetails() async {
    return const NotificationDetails(
      android: AndroidNotificationDetails(
        'channel id'
            'channel name',
        'channel description',
        importance: Importance.high,
      ),
      iOS: DarwinNotificationDetails(),
    );
  }

  static Future showNotification({
    int id = 0,
    String? title,
    String? body,
    String? payload,
  }) async =
      _notification.show(id, title, body, await _notificationDetails(),
          payload: payload);
}

依赖版本 #

flutter_local_notifications: ^12.0.3+1

修复步骤 #

1. 修正AndroidNotificationDetails参数错误
   原代码中'channel id'和'channel name'未用逗号分隔，导致参数传递错误，这是核心语法问题。修改后：

   AndroidNotificationDetails(
     'channel id',
     'channel name',
     'channel description',
     importance: Importance.high,
   )
   

2. 修正showNotification函数语法
   原代码中async =是错误写法，Dart中简写异步函数需用async =>：

   static Future showNotification({
     int id = 0,
     String? title,
     String? body,
     String? payload,
   }) async =>
       _notification.show(id, title, body, await _notificationDetails(),
           payload: payload);
   

3. 添加初始化步骤
   在使用通知前需初始化插件，建议在main函数中添加：

   Future<void> main() async {
     WidgetsFlutterBinding.ensureInitialized();
     const AndroidInitializationSettings initializationSettingsAndroid =
         AndroidInitializationSettings('@mipmap/ic_launcher');
     const InitializationSettings initializationSettings =
         InitializationSettings(android: initializationSettingsAndroid);
     await NotificationApi._notification.initialize(initializationSettings);
     runApp(const MyApp());
   }
   

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