小编Mic*_*nka的帖子

我想编写一个跟踪应用程序,当用户上车时,它会做出反应/记录,而手机会自动与蓝牙配对.我还需要免提设备的ID.

在Android上很容易,使用广播接收器你的应用程序听设备已与手机配对的广播.它甚至在手机重新启动后工作,并且重启后App没有运行.

在iOS(7+)上可以吗？

在我的应用程序中将 Xamarin.Azure.NotificationHubs.Android Nuget 从古老的 0.6 升级到 1.1.4.1（这还涉及从支持库升级到 AndroidX）后 - 没有 Azure 通知中心和 FireBase Nuget（以及使用它们的注释代码），一切正常. 使用这些 Azure/FCM NuGets 启动应用程序时出现异常：

[AndroidRuntime] Shutting down VM
[AndroidRuntime] FATAL EXCEPTION: main
[AndroidRuntime] Process: com.taphome.android.next, PID: 12930
[AndroidRuntime] java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/android/datatransport/runtime/ExecutionModule_ExecutorFactory;
[AndroidRuntime]    at com.google.android.datatransport.runtime.DaggerTransportRuntimeComponent.initialize(DaggerTransportRuntimeComponent.java:75)
[AndroidRuntime]    at com.google.android.datatransport.runtime.DaggerTransportRuntimeComponent.<init>(DaggerTransportRuntimeComponent.java:66)
[AndroidRuntime]    at com.google.android.datatransport.runtime.DaggerTransportRuntimeComponent.<init>(DaggerTransportRuntimeComponent.java:36)
[AndroidRuntime]    at com.google.android.datatransport.runtime.DaggerTransportRuntimeComponent$Builder.build(DaggerTransportRuntimeComponent.java:109)
[AndroidRuntime]    at com.google.android.datatransport.runtime.TransportRuntime.initialize(TransportRuntime.java:78)
[AndroidRuntime]    at com.google.firebase.datatransport.TransportRegistrar.lambda$getComponents$0(TransportRegistrar.java:37)
[AndroidRuntime]    at com.google.firebase.datatransport.TransportRegistrar$$Lambda$1.create(Unknown Source:0)
[AndroidRuntime]    at com.google.firebase.components.ComponentRuntime.lambda$discoverComponents$0(ComponentRuntime.java:132)
[AndroidRuntime]    at com.google.firebase.components.ComponentRuntime$$Lambda$1.get(Unknown Source:4)
[AndroidRuntime]    at com.google.firebase.components.Lazy.get(Lazy.java:53)
[AndroidRuntime]    at com.google.firebase.components.AbstractComponentContainer.get(AbstractComponentContainer.java:27)
[AndroidRuntime]    at com.google.firebase.components.RestrictedComponentContainer.get(RestrictedComponentContainer.java:89)
[AndroidRuntime]    at com.google.firebase.messaging.FirebaseMessagingRegistrar.lambda$getComponents$0$FirebaseMessagingRegistrar(Unknown Source:43)
[AndroidRuntime] …