应用程序工作正常的adb调试，但部署后apk的手机崩溃

Question

我是新手在Xamarin，所以我从教程BackgroundlocationDemo示例，并改变了一些东西。基本上在位置改变时连接到api。

它可以正常使用vs usb在我的手机上进行调试，但是当我部署apk并安装在相同的手机上时，它会崩溃（不知道是何时获取位置或发布到api），没有错误，只是“应用程序已停止”消息。

不知道如何调试，或看看问题出在哪里，或者从手机崩溃中获取任何信息。

我很感谢您提前帮助指出我的正确方向。

Answer 1

有人指出我使用Android设备日志记录（logcat），并从手机运行应用程序，而不是VS.

这样算下来，我得到这样的输出：

06-01 00:44:40.431 E/AndroidRuntime(2986): FATAL EXCEPTION: main 
06-01 00:44:40.431 E/AndroidRuntime(2986): Process: Location.Droid, PID: 2986 
06-01 00:44:40.431 E/AndroidRuntime(2986): java.lang.RuntimeException: java.lang.reflect.InvocationTargetException 
06-01 00:44:40.431 E/AndroidRuntime(2986): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:700) 
06-01 00:44:40.431 E/AndroidRuntime(2986): Caused by: java.lang.reflect.InvocationTargetException 
06-01 00:44:40.431 E/AndroidRuntime(2986): at java.lang.reflect.Method.invoke(Native Method) 
06-01 00:44:40.431 E/AndroidRuntime(2986): at java.lang.reflect.Method.invoke(Method.java:372) 
06-01 00:44:40.431 E/AndroidRuntime(2986): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:905) 
06-01 00:44:40.431 E/AndroidRuntime(2986): ... 1 more 
06-01 00:44:40.431 E/AndroidRuntime(2986): Caused by: md52ce486a14f4bcd95899665e9d932190b.JavaProxyThrowable: System.Net.WebException: Error: NameResolutionFailure 
06-01 00:44:40.431 E/AndroidRuntime(2986): at System.Net.WebClient.UploadDataInternal (System.Uri address, System.String method, System.Byte[] data, System.Net.WebRequest& request) [0x000a6] in :0 
06-01 00:44:40.431 E/AndroidRuntime(2986): at System.Net.WebClient.UploadString (System.Uri address, System.String method, System.String data) [0x00054] in :0 
06-01 00:44:40.431 E/AndroidRuntime(2986): at System.Net.WebClient.UploadString (System.String address, System.String data) [0x00019] in :0 
06-01 00:44:40.431 E/AndroidRuntime(2986): at (wrapper remoting-invoke-with-check) System.Net.WebClient:UploadString (string,string) 
06-01 00:44:40.431 E/AndroidRuntime(2986): at Location.Droid.Services.LocationService.OnLocationChanged (Android.Locations.Location location) [0x00157] in :0 
06-01 00:44:40.431 E/AndroidRuntime(2986): at Android.Locations.ILocationListenerInvoker.n_OnLocationChanged_Landroid_location_Location_ (IntPtr jnienv, IntPtr native__this, IntPtr native_location) [0x00011] in :0 
06-01 00:44:40.431 E/AndroidRuntime(2986): at (wrapper dynamic-method) System.Object:cad3edbb-2ed8-4cac-ad94-e74d5e046d4e (intptr,intptr,intptr) 
06-01 00:44:40.431 E/AndroidRuntime(2986): at md5227b9e8295fbee87e0da67869d6e828e.LocationService.n_onLocationChanged(Native Method) 
06-01 00:44:40.431 E/AndroidRuntime(2986): at md5227b9e8295fbee87e0da67869d6e828e.LocationService.onLocationChanged(LocationService.java:68) 
06-01 00:44:40.431 E/AndroidRuntime(2986): at android.location.LocationManager$ListenerTransport._handleMessage(LocationManager.java:281) 
06-01 00:44:40.431 E/AndroidRuntime(2986): at android.location.LocationManager$ListenerTransport.access$000(LocationManager.java:210) 
06-01 00:44:40.431 E/AndroidRuntime(2986): at android.location.LocationManager$ListenerTransport$1.handleMessage(LocationManager.java:226) 
06-01 00:44:40.431 E/AndroidRuntime(2986): at android.os.Handler.dispatchMessage(Handler.java:102) 
06-01 00:44:40.431 E/AndroidRuntime(2986): at android.os.Looper.loop(Looper.java:135) 
06-01 00:44:40.431 E/AndroidRuntime(2986): at android.app.ActivityThread.main(ActivityThread.java:5343) 

所以，这似乎是解决URL的问题。经过一番研究，我发现我需要给应用程序提供INTERNET许可。