Android 服务意图必须明确：具有额外功能

我尝试了不同的方法，但不确定出了什么问题，我在启动此特定服务时出现了此错误

服务意图必须是明确的：意图{ act=com.xamarin.action.PLAY（有额外功能）}

启动服务时，我正在传递一个字符串

ID

，如下所示

var intent = new Intent(MediaService.ActionPlay);
intent.PutExtra("ID", ID);                                
StartService(intent); // Error here

[Service]
[IntentFilter(new[] { ActionPlay, ActionPause, ActionStop })]
public class MediaService: Service
  {
   public const string ActionPlay = "com.xamarin.action.PLAY";
   public const string ActionPause = "com.xamarin.action.PAUSE";
   public const string ActionStop = "com.xamarin.action.STOP";

   public override StartCommandResult OnStartCommand(Intent intent, 
     StartCommandFlags flags, int startId)
     { 
       switch (intent.Action)
                {
                    case ActionPlay: Play(intent.GetStringExtra("ID")); break;
                    case ActionStop: Stop(); break;
                    case ActionPause: Pause(); break;
                }
     }     
  }

public bool Play(string playID)
{ 
   ....
}

我的服务如下所示

var intent = new Intent(MediaService.ActionPlay);
intent.PutExtra("ID", ID);                                
StartService(intent); // Error here

[Service]
[IntentFilter(new[] { ActionPlay, ActionPause, ActionStop })]
public class MediaService: Service
  {
   public const string ActionPlay = "com.xamarin.action.PLAY";
   public const string ActionPause = "com.xamarin.action.PAUSE";
   public const string ActionStop = "com.xamarin.action.STOP";

   public override StartCommandResult OnStartCommand(Intent intent, 
     StartCommandFlags flags, int startId)
     { 
       switch (intent.Action)
                {
                    case ActionPlay: Play(intent.GetStringExtra("ID")); break;
                    case ActionStop: Stop(); break;
                    case ActionPause: Pause(); break;
                }
     }     
  }

public bool Play(string playID)
{ 
   ....
}

其中播放动作如下所示

var intent = new Intent(MediaService.ActionPlay);
intent.PutExtra("ID", ID);                                
StartService(intent); // Error here

[Service]
[IntentFilter(new[] { ActionPlay, ActionPause, ActionStop })]
public class MediaService: Service
  {
   public const string ActionPlay = "com.xamarin.action.PLAY";
   public const string ActionPause = "com.xamarin.action.PAUSE";
   public const string ActionStop = "com.xamarin.action.STOP";

   public override StartCommandResult OnStartCommand(Intent intent, 
     StartCommandFlags flags, int startId)
     { 
       switch (intent.Action)
                {
                    case ActionPlay: Play(intent.GetStringExtra("ID")); break;
                    case ActionStop: Stop(); break;
                    case ActionPause: Pause(); break;
                }
     }     
  }

public bool Play(string playID)
{ 
   ....
}

---

我做错了什么。

您可以设置您意图的软件包id：

intent.SetPackage(PackageName);

或者使用当前上下文和Java类（或C类型）：

---

非常感谢，我使用了当前上下文和C#type以及

intent.SetAction（“com.xamarin.action.PLAY”）并且它现在正在工作。非常感谢你的帮助。干杯，小伙子，我能帮忙