MvxSpinner crash with Resources+NotFoundException on an attempt to bind an items list

Question

I used to have a MvxSpinned control to select an item from a list. After recent migration from MvvmCross 4.x to 5.x it stopped working, crash the app in an attempt to bind the MvxSpinner

<MvxSpinner
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    local:MvxBind="ItemsSource MyList;SelectedItem ItemFromTheList;Visible IsItemSelectorEnabled" />

And the error (crash) is basically sais that some resource couldn't be found during the list item view inflation

Java.Interop.JniEnvironmentResource ID #0x0
Raw
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()<896ad1d315ca4ba7b117efb8dacaedcf>:0
Java.Interop.JniEnvironment.InstanceMethods.CallNonvirtualObjectMethod(JniObjectReference instance, JniObjectReference type, JniMethodInfo method, JniArgumentValue* args)<7cfbebb561c54efc9010b018c0846c7e>:0
Java.Interop.JniPeerMembers.JniInstanceMethods.InvokeVirtualObjectMethod(string encodedMember, IJavaPeerable self, JniArgumentValue* parameters)<7cfbebb561c54efc9010b018c0846c7e>:0
Android.Views.LayoutInflater.Inflate(int resource, ViewGroup root, bool attachToRoot)<e975227ac8644a30bb0866117325de0d>:0
MvvmCross.Binding.Droid.Views.MvxLayoutInflater.Inflate(int resource, ViewGroup root, bool attachToRoot)<0f7a6d7740764835ab4a872238640fdc>:0
MvvmCross.Binding.Droid.BindingContext.MvxAndroidBindingContext.CommonInflate(int resourceId, ViewGroup viewGroup, bool attachToRoot)<0f7a6d7740764835ab4a872238640fdc>:0
MvvmCross.Binding.Droid.BindingContext.MvxAndroidBindingContext.BindingInflate(int resourceId, ViewGroup viewGroup, bool attachToRoot)<0f7a6d7740764835ab4a872238640fdc>:0
MvvmCross.Binding.Droid.Views.MvxListItemView.MvxListItemView(Context context, IMvxLayoutInflaterHolder layoutInflaterHolder, object dataContext, ViewGroup parent, int templateId)<0f7a6d7740764835ab4a872238640fdc>:0
MvvmCross.Binding.Droid.Views.MvxAdapter.CreateBindableView(object dataContext, ViewGroup parent, int templateId)<0f7a6d7740764835ab4a872238640fdc>:0
MvvmCross.Binding.Droid.Views.MvxAdapter.GetBindableView(View convertView, object dataContext, ViewGroup parent, int templateId)<0f7a6d7740764835ab4a872238640fdc>:0
MvvmCross.Binding.Droid.Views.MvxAdapter.GetView(int position, View convertView, ViewGroup parent, int templateId)<0f7a6d7740764835ab4a872238640fdc>:0
MvvmCross.Binding.Droid.Views.MvxAdapter.GetView(int position, View convertView, ViewGroup parent)<0f7a6d7740764835ab4a872238640fdc>:0
Android.Widget.BaseAdapter.n_GetView_ILandroid_view_View_Landroid_view_ViewGroup_(IntPtr jnienv, IntPtr native__this, int position, IntPtr native_convertView, IntPtr native_parent)<e975227ac8644a30bb0866117325de0d>:0
at (wrapper dynamic-method) System.Object:a5f970b5-8275-430d-a4b9-72fe165e02cc (intptr,intptr,int,intptr,intptr)
--- End of managed Android.Content.Res.Resources+NotFoundException stack trace ---
android.content.res.Resources$NotFoundException: Resource ID #0x0
at android.content.res.Resources.getValue(Resources.java:1266)
at android.content.res.Resources.loadXmlResourceParser(Resources.java:2652)
at android.content.res.Resources.getLayout(Resources.java:1082)
at android.view.LayoutInflater.inflate(LayoutInflater.java:412)
md568b3ec281d538477a14850a575f79ed6.MvxAdapter.n_getView(Native Method)
at md568b3ec281d538477a14850a575f79ed6.MvxAdapter.getView(MvxAdapter.java:92)
at android.widget.AbsSpinner.onMeasure(AbsSpinner.java:197)
at android.widget.Spinner.onMeasure(Spinner.java:507)
at android.support.v7.widget.AppCompatSpinner.onMeasure(AppCompatSpinner.java:426)
at android.view.View.measure(View.java:17565)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5537)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
at android.view.View.measure(View.java:17565)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5537)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
at android.view.View.measure(View.java:17565)
at android.widget.ScrollView.measureChildWithMargins(ScrollView.java:1263)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at android.widget.ScrollView.onMeasure(ScrollView.java:337)
at android.view.View.measure(View.java:17565)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5537)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
at android.view.View.measure(View.java:17565)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5537)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:139)
at android.view.View.measure(View.java:17565)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5537)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
at android.view.View.measure(View.java:17565)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5537)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at android.view.View.measure(View.java:17565)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5537)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
at android.view.View.measure(View.java:17565)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5537)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2615)
at android.view.View.measure(View.java:17565)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2045)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1196)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1409)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1084)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5990)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
at android.view.Choreographer.doCallbacks(Choreographer.java:580)
at android.view.Choreographer.doFrame(Choreographer.java:550)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5343)
java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:905)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:700)

Answer 1

Got the same error as you did. The solution is to set explicitly spinner's ItemTemplateId and DropDownItemTemplateId in your Activity(or Fragment), for instance:

MvxAppCompatSpinner spinner = FindViewById<MvxAppCompatSpinner>(Resource.Id.spinner);
spinner.ItemTemplateId = Android.Resource.Layout.SimpleSpinnerItem;
spinner.DropDownItemTemplateId = Android.Resource.Layout.SimpleSpinnerDropDownItem;

Answer 2

To build on Krum's solution, one can also directly set the MvxItemTemplate and MvxDropDownItemTemplate directly in the XML so as to avoid having to intercept the spinner creation in the view code:

local:MvxItemTemplate="@android:layout/simple_spinner_item"                  
local:MvxDropDownItemTemplate="@android:layout/simple_spinner_dropdown_item"

Careful here, we need to specify the template, not the id.