Question

我是Xamarin的Android开发新手。我已经创建了一个示例应用程序，它运行正常。但突然间我得到了以下错误，我无法弄清楚该做什么。我没有从互联网上获得任何解决方案。我重新安装了一切，但没有运气。请帮忙！

Java JDK 1.7.0
Android SDK 22.0.0
GTK＃2.12.26
Xamarin Studio 5.9.4
Xamarin 3.11.666

错误：

Java.Lang.RuntimeException: java.lang.reflect.InvocationTargetException
  at --- End of managed exception stack trace ---
  at java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
  at at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
  at at dalvik.system.NativeStart.main(Native Method)
  at Caused by: java.lang.reflect.InvocationTargetException
  at at java.lang.reflect.Method.invokeNative(Native Method)
  at at java.lang.reflect.Method.invoke(Method.java:515)
  at at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
  at ... 2 more
  at Caused by: md52ce486a14f4bcd95899665e9d932190b.JavaProxyThrowable: System.ArgumentNullException: Argument cannot be null.
  at Parameter name: value
  at at Newtonsoft.Json.Utilities.ValidationUtils.ArgumentNotNull (object,string) <IL 0x00009, 0x0006c>
  at at Newtonsoft.Json.JsonConvert.DeserializeObject (string,System.Type,Newtonsoft.Json.JsonSerializerSettings) <IL 0x00006, 0x00067>
  at at Newtonsoft.Json.JsonConvert.DeserializeObject<Tasky.Core.UserData> (string,Newtonsoft.Json.JsonSerializerSettings) <0x00063>
  at at Newtonsoft.Json.JsonConvert.DeserializeObject<Tasky.Core.UserData> (string) <0x0006b>
  at TaskyAndroid.Screens.HomeScreen.OnCreate (Android.OS.Bundle) [0x00017] in f:\Solutions\Xamarin\Tasky\Android_Starter\TaskyAndroid\Screens\HomeScreen.cs:60
  at Android.App.Activity.n_OnCreate_Landroid_os_Bundle_ (intptr,intptr,intptr) [0x00011] in /Users/builder/data/lanes/1879/5f55a9ef/source/monodroid/src/Mono.Android/platforms/android-10/src/generated/Android.App.Activity.cs:1777
  at at (wrapper dynamic-method) object.6147fbee-1dc5-4093-b962-ef4f61496551 (intptr,intptr,intptr) <IL 0x00017, 0x00043>
  at at md5b8e170d2a8045dd039dc8ae8a9f57934.HomeScreen.n_onCreate(Native Method)
  at at md5b8e170d2a8045dd039dc8ae8a9f57934.HomeScreen.onCreate(HomeScreen.java:29)
  at at android.app.Activity.performCreate(Activity.java:5231)
  at at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
  at at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148)
  at at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
  at at android.app.ActivityThread.access$800(ActivityThread.java:135)
  at at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
  at at android.os.Handler.dispatchMessage(Handler.java:102)
  at at android.os.Looper.loop(Looper.java:136)
  at at android.app.ActivityThread.main(ActivityThread.java:5001)
  at ... 5 more

异常在Xamarin中启动Android应用程序

0 个答案: