C＃Android：在服务上获取广播接收器？

我正在开发xamarin.android中的辅助function服务。 一切都很好，但我想要服务上的广播接收器。 我知道我必须从广播接收器派生我的可访问性服务，但这是不可能的，因为该服务已经从Android.AccessibilityService派生。 实际上，当用户对主要活动进行一些配置更改时，我想提出一个广播接收器，我的可访问性服务应该监听。 那么，有什么想法吗？

Answer 1

在您的Service ，定义一个BroadcastReceiver内部类，并在您的Service构造函数中创建并注册 BroadcastReceiver 。

嵌入式BroadcastReceiver Service示例：

 [Service(Label = "StackOverflowService")] [IntentFilter(new String[] { "com.yourpackage.StackOverflowService" })] public class StackOverflowService : Service { public const string BROADCASTFILTER = "com.yourpackage.intent.action.IMAGEOPTIMIZER"; IBinder binder; StackOverflowServiceBroadcastReceiver broadcastReceiver; public StackOverflowService() { broadcastReceiver = new StackOverflowServiceBroadcastReceiver(this); RegisterReceiver(broadcastReceiver, new IntentFilter(BROADCASTFILTER)); } public override StartCommandResult OnStartCommand(Intent intent, StartCommandFlags flags, int startId) { return StartCommandResult.NotSticky; } public override IBinder OnBind(Intent intent) { binder = new StackOverflowServiceBinder(this); return binder; } [IntentFilter(new[] { BROADCASTFILTER })] class StackOverflowServiceBroadcastReceiver : BroadcastReceiver { StackOverflowService service; public StackOverflowServiceBroadcastReceiver(StackOverflowService service) : base() { this.service = service; } public override void OnReceive(Context context, Intent intent) { var stack = intent.GetStringExtra("Stack"); Log.Debug("SO", $"{BROADCASTFILTER} Received : {stack}"); // access your service via the "service" var... } } } public class StackOverflowServiceBinder : Binder { readonly StackOverflowService service; public StackOverflowServiceBinder(StackOverflowService service) { this.service = service; } public StackOverflowService GetStackOverflowService() { return service; } } 

用法：

 var intentForService = new Intent(StackOverflowService.BROADCASTFILTER) .PutExtra("Stack", "Overflow"); Application.Context.SendBroadcast(intentForService);