带有 WorkManger 的 Xamarin 表单

Question

我正在尝试在 nuget 包 Xamarin.Android.Arch.Work.Runtime 中使用 WorkManager 的 Xamarin 实现。

问题是：如何将“复杂”的参数传递给worker类？

我有一个带有 DI 和其他类的 Xamarin Forms 应用程序，但该作业只收到 Java.Lang.Object。

我的代码：

// Method to Schedule the Job
// See the dataParam? That line throw an exception
// I can manage to pass a simple string or int to the job this way, but not 
// complex classes
public void ScheduleAppJobs(IContainerProvider containerRegistry)
{
       //here the code throw an exception
       var dataParam = new Data.Builder().Put("param", new JobParameter());
        
       var syncWorkerReuest = PeriodicWorkRequest.Builder.From<SyncChecklistWorker>(TimeSpan.FromMinutes(5))
                                                                      .SetInputData(dataParam.Build())
                                                                      .Build(); 
       WorkManager.Instance.Enqueue(syncWorkerReuest);
    }

    //this was my try to create a custom class and populate with my objects
    //But didn't worked
    public class JobParameter : Java.Lang.Object
    {
    }

    //my job implementation
    public class SyncChecklistWorker : Worker
        {
            public SyncChecklistWorker(Context context, WorkerParameters workerParameters) : base(context, workerParameters)
            {
            }
    
            public override Result DoWork()
            {
                if (InputData.KeyValueMap.TryGetValue("param", out Java.Lang.Object @object))
                {
                    var jobParam = (JobParameter)@object;
    
                    // here I would like to get my DI container to resolve services and execute business logic
                    // var diResolver = jobParam.GetDIContainer();
    
                    return Result.InvokeSuccess();
                }
    
                return Result.InvokeRetry();
            }
        }
}

问题是：

• 将输入数据传递给作业的唯一方法是 Data.Builder 只接受 Java.Lang.Object。甚至尝试使用 JobParameter : Java.Lang.Object 我在尝试执行时收到以下错误：new Data.Builder().Put("param", new JobParameter()); 错误：Java.Lang.IllegalArgumentException: 'Key param has invalid type class crc648d221dddf00bc7fb.JobParameter'
• 在官方 Microsoft Docs 中，FireBase Job Dispatcher nuget 已弃用。那么如何使用新的 WorkManager 呢？

FireBase 作业调度程序文档： https://docs.microsoft.com/en-us/xamarin/android/platform/firebase-job-dispatcher

已弃用的 nuget： https://www.nuget.org/packages/Xamarin.Firebase.JobDispatcher

知道如何解决这个问题吗？

Answer 1

来自数据构建器的工作请求仅接受前置类型。您可以通过序列化为 JSON 字符串格式来传递对象，并在 DoWork() 中反序列化它。

 public void ScheduleAppJobs(IContainerProvider containerRegistry)
 {
    var dataParam = new Data.Builder().PutString("param",serializeToJson(new  
    MyClass())); 

    var syncWorkerReuest = PeriodicWorkRequest.Builder.From<SyncChecklistWorker> 
    (TimeSpan.FromMinutes(5))                                                                  
    .SetInputData(dataParam.Build())
    .Build();  
     WorkManager.Instance.Enqueue(syncWorkerReuest);
   }

   public override Result DoWork()
   {
     var jsonString = InputData.GetString("param");
     var myClassObj = deserializeFromJson(jsonString );
    }
 
    using Newtonsoft.Json;
    public  string serializeToJson(MyClass myClassObj)
     {
        var resultString = JsonConvert.SerializeObject(myClassObj);
        return resultString;
     }

      // Deserialize to single object.
      public  MyClass deserializeFromJson(string jsonString)
      {
        var serializer = new JsonSerializer();
        var resultObject = serializer.Deserialize<MyClass>(jsonString);
      }