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我正在尝试MvxListView使用我自己的自定义添加页眉和页脚MvxAdapter。

从一个活动中，我可以将适配器添加到OnCreate()方法中的列表视图中，它就可以工作了。

但是，如果我尝试从OnCreateView()Fragment 中执行相同的操作，则会得到Java.Lang.RuntimeException以下堆栈跟踪：

at Android.Runtime.JNIEnv.CallNonvirtualVoidMethod (IntPtr jobject, IntPtr jclass, IntPtr jmethod) [0x00000] in <filename unknown>:0 
at Android.Widget.BaseAdapter.NotifyDataSetChanged () [0x00000] in <filename unknown>:0 
at Cirrious.MvvmCross.Binding.Droid.Views.MvxAdapter.NotifyDataSetChanged (System.Collections.Specialized.NotifyCollectionChangedEventArgs e) [0x00000] in <filename unknown>:0 
at Cirrious.MvvmCross.Binding.Droid.Views.MvxAdapter.OnItemsSourceCollectionChanged (System.Object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e) [0x00000] in <filename unknown>:0 
at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (System.Reflection.MonoMethod,object,object[],System.Exception&)
at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0 
--- End of managed exception stack trace ---
java.lang.NullPointerException
    at android.widget.BaseAdapter.notifyDataSetChanged(BaseAdapter.java:50)
    at mono.java.lang.RunnableImplementor.n_run(Native Method)
    at mono.java.lang.RunnableImplementor.run(RunnableImplementor.java:29)
    at android.os.Handler.handleCallback(Handler.java:615)
    at android.os.Handler.dispatchMessage(Handler.java:92)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:4898)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
    at dalvik.system.NativeStart.main(Native Method)

我在这里错过了什么吗？

谢谢！

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