C# Xamarin Android无法绑定到服务空指针

你好，我正在用Xamarin C#来做Android。 我试图用ListView构建一个小部件

我的移植代码：

首先我把这个移植到C#： （来源：）

然后我做了这个改变：

现在我卡住了。每次我尝试将小部件添加到屏幕时，它只显示RemoteView空视图，并因以下错误而崩溃：

Java.Lang.RuntimeException: Unable to bind to service md5037fca43706e0b812912372d4076c895.WidgetService@3888bf9f with Intent { dat=intent: cmp=StimeApplication.StimeApplication/md5037fca43706e0b812912372d4076c895.WidgetService (has extras) }: java.lang.NullPointerException: Attempt to invoke interface method 'void android.widget.RemoteViewsService$RemoteViewsFactory.onCreate()' on a null object reference ---> Java.Lang.NullPointerException: Attempt to invoke interface method 'void android.widget.RemoteViewsService$RemoteViewsFactory.onCreate()' on a null object reference
  at --- End of managed exception stack trace ---
  at java.lang.NullPointerException: Attempt to invoke interface method 'void android.widget.RemoteViewsService$RemoteViewsFactory.onCreate()' on a null object reference
  at at android.widget.RemoteViewsService.onBind(RemoteViewsService.java:243)
  at at android.app.ActivityThread.handleBindService(ActivityThread.java:2939)
  at at android.app.ActivityThread.access$1900(ActivityThread.java:169)
  at at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1511)
  at at android.os.Handler.dispatchMessage(Handler.java:111)
  at at android.os.Looper.loop(Looper.java:194)
  at at android.app.ActivityThread.main(ActivityThread.java:5552)
  at at java.lang.reflect.Method.invoke(Native Method)
  at at java.lang.reflect.Method.invoke(Method.java:372)
  at at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:964)
  at at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:759)
  --- End of inner exception stack trace ---
  at --- End of managed exception stack trace ---
  at java.lang.RuntimeException: Unable to bind to service md5037fca43706e0b812912372d4076c895.WidgetService@3888bf9f with Intent { dat=intent: cmp=StimeApplication.StimeApplication/md5037fca43706e0b812912372d4076c895.WidgetService (has extras) }: java.lang.NullPointerException: Attempt to invoke interface method 'void android.widget.RemoteViewsService$RemoteViewsFactory.onCreate()' on a null object reference
  at at android.app.ActivityThread.handleBindService(ActivityThread.java:2952)
  at at android.app.ActivityThread.access$1900(ActivityThread.java:169)
  at at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1511)
  at at android.os.Handler.dispatchMessage(Handler.java:111)
  at at android.os.Looper.loop(Looper.java:194)
  at at android.app.ActivityThread.main(ActivityThread.java:5552)
  at at java.lang.reflect.Method.invoke(Native Method)
  at at java.lang.reflect.Method.invoke(Method.java:372)
  at at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:964)
  at at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:759)
  at Caused by: java.lang.NullPointerException: Attempt to invoke interface method 'void android.widget.RemoteViewsService$RemoteViewsFactory.onCreate()' on a null object reference
  at at android.widget.RemoteViewsService.onBind(RemoteViewsService.java:243)
  at at android.app.ActivityThread.handleBindService(ActivityThread.java:2939)
  at ... 9 more

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我希望有人能帮助我，我不知道搜索什么以及这个错误是从哪里来的。

经过几个小时的搜索后修复了它。答复: “您必须从Java.Lang.Object继承并删除句柄和Dispose方法。” 从…起

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我还更新了我的git respority，所以可以随意使用它。

经过几个小时的搜索后修复了它。答复: “您必须从Java.Lang.Object继承并删除句柄和Dispose方法。” 从…起 我还更新了我的git respority，所以可以随意使用它