Unity Mobile Notifications在Android 13+无法显示问题求助

问题详情 #

• 现象：Unity Mobile Notifications在Android 13及更高版本无法弹出通知，但在Android 12上运行完全正常。
• 已执行操作/排查结果：
  • 自定义清单中已添加POST_NOTIFICATION权限
  • 注册通知渠道和发送通知前，已明确发起用户权限请求
  • Logcat无错误日志，显示通知已成功注册
  • 使用的是最新版UnityMobileNotification包
• 测试对比：将负责注册通知的脚本迁移至Unity 2022项目，调整清单及项目设置后，通知在所有Android版本均正常工作。主项目为Unity 6预览版，与Unity 2022测试项目配置看似一致，且测试项目未使用Android Resolver或自定义Gradle文件。

相关脚本 #

public async UniTask StartAsync(CancellationToken cancellation)
{
    await WaitPermissionAsync(_tokenSource.Token);
    
    RegisterChannel();
    ClearNotifications();
}

private void RegisterChannel()
{
    AndroidNotificationCenter.Initialize();
    var channel = new AndroidNotificationChannel()
    {
        Id = ChannelId,
        Name = "Notifications_Channel_Evolution",
        Description = "Default description",
        Importance = Importance.High,
    };

    AndroidNotificationCenter.RegisterNotificationChannel(channel);
    _notificationInitialized = true;

    Debug.Log("[Notification] Channel registered");
}

private async UniTask WaitPermissionAsync(CancellationToken token)
{
    var request = new PermissionRequest();
    await UniTask.WaitUntil(() => request.Status != PermissionStatus.RequestPending, cancellationToken: token);

    Debug.Log("[Notification] Permission perform: " + request.Status);
}

private void RegisterNotifications()
{
    if (_notificationInitialized == false)
    {
        return;
    }
    
    var calculatedTimes = CalculateNotificationTimes();
    int i = 0;
    foreach (var calculatedTime in calculatedTimes)
    {
        i++;
        
        if (i > 2)
        {
            return;
        }
        
        NotificationsType type = NotificationsType.Default;

        if (_dailyRewardClaimedObserver.GetDailyRewardStatus())
        {
            type = NotificationsType.Reward;
        }

        var notificationData = _localTextProvider.ChooseLocalKeysByRewardStatus(type)
            .GetRandomLocalText();

        var time = DateTime.Now.AddSeconds(20);

        var notification = new AndroidNotification
        {
            Title = notificationData.Item1,
            Text = notificationData.Item2,
            FireTime = time
        };

        var id = AndroidNotificationCenter.SendNotification(notification, ChannelId);
        var status = AndroidNotificationCenter.CheckScheduledNotificationStatus(id);

        Debug.Log($"[Notification] Notification {id} at {calculatedTime} is {status}");
    }

    Debug.Log("[Notification] Notifications registered");
}

内容的提问来源于stack exchange，提问作者Максим