c# - 幻影错误 Xamarin Forms Android

Question

我连接了一个物理设备。当手机被锁定并且我在解锁后部署应用程序时，应用程序工作并且一切都很好。但是，如果屏幕已解锁并且我部署了我会收到以下错误。在这种情况下，模拟器上一切正常。帮助我理解这个废话。

**System.NullReferenceException:** 'Object reference not set to an instance of an object.'

[HotReload] (2021-03-17 23:08:35.2): INFO: Инициализация горячей перезагрузки XAML…
[HotReload] (2021-03-17 23:08:35.2): WARN: (DriverHelper v 2.0.Android) Unknown Breakpoint Hit: Android.Runtime.JNIEnv.RegisterJniNatives( typeName_ptr, int typeName_len,  jniClass,  methods_ptr, int methods_len)

"<unnamed thread>"  at <unknown> <0xffffffff>
  at (wrapper managed-to-native) System.Diagnostics.Debugger.Mono_UnhandledException_internal (System.Exception) <0x00007>
  at System.Diagnostics.Debugger.Mono_UnhandledException (System.Exception) [0x00000] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/corlib/System.Diagnostics/Debugger.cs:125
  at (wrapper dynamic-method) Android.Runtime.DynamicMethodNameCounter.46 (intptr,intptr) [0x00020] in <44e54a86dea24313a2bdb807df77c27a>:0
  at (wrapper native-to-managed) Android.Runtime.DynamicMethodNameCounter.46 (intptr,intptr) [0x00033] in <44e54a86dea24313a2bdb807df77c27a>:0

"ProtocolHandler.SendThread"  at <unknown> <0xffffffff>
  at (wrapper managed-to-native) System.Threading.Monitor.Monitor_wait (object,int) <0x00007>
  at System.Threading.Monitor.ObjWait (bool,int,object) [0x0002f] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/corlib/System.Threading/Monitor.cs:85
  at System.Threading.Monitor.Wait (object,int,bool) [0x0000e] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/referencesource/mscorlib/system/threading/monitor.cs:218
  at System.Threading.Monitor.Wait (object) [0x00000] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/referencesource/mscorlib/system/threading/monitor.cs:238
  at Microsoft.VisualStudio.DesignTools.TapContract.Networking.ProtocolHandler/WaitableActionsList.WaitForData () [0x00019] in <c37c1589af144356b99fb170c5e22242>:0
  at Microsoft.VisualStudio.DesignTools.TapContract.Networking.ProtocolHandler.ActionThread (object) [0x00045] in <c37c1589af
144356b99fb170c5e22242>:0
  at System.Threading.ThreadHelper.ThreadStart_Context (object) [0x00025] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/referencesource/mscorlib/system/threading/thread.cs:78
  at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool) [0x00071] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/referencesource/mscorlib/system/threading/executioncontext.cs:968
  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool) [0x00000] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/referencesource/mscorlib/system/threading/executioncontext.cs:910
  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object) [0x0002b] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/
03-17 23:08:49.317 E/mono    (27416): Full thread dump:referencesource/mscorlib/system/threading/executioncontext.cs:899
  at System.Threading.ThreadHelper.ThreadStart (object) [0x0000f] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/referencesource/mscorlib/system/threading/thread.cs:93
  at (wrapper runtime-invoke) <Module>.runtime_invoke_void__this___object (object,intptr,intptr,intptr) [0x0006b] in <c72658f647bc485bbfb8c9fcaa790862>:0

"<threadpool thread>"
"Debugger agent"
"Thread Pool Worker"
"Thread Pool Worker"
"Thread Pool Worker"
"Timer-Scheduler"
"Finalizer"
"ProtocolHandler.ProcessThread"  at <unknown> <0xffffffff>
  at (wrapper managed-to-native) System.Threading.Monitor.Monitor_wait (object,int) <0x00007>
  at System.Threading.Monitor.ObjWait (bool,int,object) [0x0002f] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/corlib/System.Threading/Monitor.cs:85
  at System.Threading.Monitor.Wait (object,int,bool) [0x0000e] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android

/release/mcs/class/referencesource/mscorlib/system/threading/monitor.cs:218
  at System.Threading.Monitor.Wait (object) [0x00000] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/referencesource/mscorlib/system/threading/monitor.cs:238
  at Microsoft.VisualStudio.DesignTools.TapContract.Networking.ProtocolHandler/WaitableActionsList.WaitForData () [0x00019] in <c37c1589af144356b99fb170c5e22242>:0
  at Microsoft.VisualStudio.DesignTools.TapContract.Networking.ProtocolHandler.ActionThread (object) [0x00045] in <c37c1589af144356b99fb170c5e22242>:0
  at System.Threading.ThreadHelper.ThreadStart_Context (object) [0x00025] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/referencesource/mscorlib/system/threading/thread.cs:78
  at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool) [0x00071] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/re
ferencesource/mscorlib/system/threading/executioncontext.cs:968
  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool) [0x00000] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/referencesource/mscorlib/system/threading/executioncontext.cs:910
  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object) [0x0002b] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/referencesource/mscorlib/system/threading/executioncontext.cs:899
  at System.Threading.ThreadHelper.ThreadStart (object) [0x0000f] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/referencesource/mscorlib/system/threading/thread.cs:93
  at (wrapper runtime-invoke) <Module>.runtime_invoke_void__this___object (object,intptr,intptr,intptr) [0x0006b] in <c72658f647bc485bbfb8c9fcaa790862>:0

"ProtocolHandler.ReadThread"  at <unknow
n> <0xffffffff>
  at (wrapper managed-to-native) System.Threading.Monitor.Monitor_wait (object,int) <0x00007>
  at System.Threading.Monitor.ObjWait (bool,int,object) [0x0002f] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/corlib/System.Threading/Monitor.cs:85
  at System.Threading.Monitor.Wait (object,int,bool) [0x0000e] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/referencesource/mscorlib/system/threading/monitor.cs:218
  at System.Threading.Monitor.Wait (object) [0x00000] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/referencesource/mscorlib/system/threading/monitor.cs:238
  at Xamarin.HotReload.HotReloadAgent.Microsoft.VisualStudio.DesignTools.TapContract.Networking.IDataBridge.ReadMessage () [0x0002f] in D:\a\1\s\Source\Xamarin.HotReload.Agent\HotReloadAgent.cs:341
  at Microsoft.VisualStudio.DesignTools.TapContract.Networking.ProtocolHandler.ReadThread () [0x00038] in <c37c1589af144356b99fb170c
5e22242>:0
  at System.Threading.ThreadHelper.ThreadStart_Context (object) [0x00014] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/referencesource/mscorlib/system/threading/thread.cs:74
  at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool) [0x00071] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/referencesource/mscorlib/system/threading/executioncontext.cs:968
  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool) [0x00000] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/referencesource/mscorlib/system/threading/executioncontext.cs:910
  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object) [0x0002b] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/referencesource
/mscorlib/system/threading/executioncontext.cs:899
  at System.Threading.ThreadHelper.ThreadStart () [0x00008] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/referencesource/mscorlib/system/threading/thread.cs:111
  at (wrapper runtime-invoke) object.runtime_invoke_void__this__ (object,intptr,intptr,intptr) [0x00067] in <c72658f647bc485bbfb8c9fcaa790862>:0

标签： c#xamarinxamarin.formsxamarin.android