Xamarin android date picker NullPointerException. #1156

Steps to Reproduce

1. Create a Xamarin android project with the following versions:

Xamarin v4.8.0.753
Android SDK v8.1.0.25

2. install nugget Xamarin.Android.Support.v7.AppCompat (v26.1.0.1)
3. Create a layout and add a date picker.

Expected Behavior

date picker is rendered on the layout viewer

Actual Behavior

Throws an exception.

Version Information

Xamarin v4.8.0.753
Android SDK v8.1.0.25
Xamarin.Android.Support.v7.AppCompat (v26.1.0.1)

Log File

Trying to load class android.support.v7.widget.AppCompatTextView

Failed to process message RenderLayout
mono.android.DesignerException: java.lang.NullPointerException
at mono.android.DesignerException.fromThrowable(DesignerException.java:46)
at mono.android.DesignerSession.checkRenderResultForError(DesignerSession.java:190)
at mono.android.DesignerSession.renderInternal(DesignerSession.java:343)
at mono.android.SessionProjectCallback.computeInMonoDroidContextUnsafe(SessionProjectCallback.java:112)
at mono.android.DesignerSession.render(DesignerSession.java:335)
at mono.android.DesignerSession.processMessage(DesignerSession.java:721)
at mono.android.MessageListener.executeMessage(MessageListener.java:88)
at mono.android.MessageListener$Runner.run(MessageListener.java:44)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException
at android.content.res.Resources_Delegate.getValue(Resources_Delegate.java:788)
at android.content.res.Resources.getValue(Resources.java:1286)
at android.support.v4.content.res.ResourcesCompat.loadFont(ResourcesCompat.java:212)
at android.support.v4.content.res.ResourcesCompat.getFont(ResourcesCompat.java:206)
at android.support.v7.widget.TintTypedArray.getFont(TintTypedArray.java:119)
at android.support.v7.widget.AppCompatTextHelper.updateTypefaceAndStyle(AppCompatTextHelper.java:208)
at android.support.v7.widget.AppCompatTextHelper.onSetTextAppearance(AppCompatTextHelper.java:242)
at android.support.v7.widget.AppCompatTextView.setTextAppearance(AppCompatTextView.java:161)
at android.widget.TextView.setTextAppearance(TextView.java:2791)
at android.widget.YearPickerView$YearAdapter.getView(YearPickerView.java:192)
at android.widget.AbsListView.obtainView(AbsListView.java:2362)
at android.widget.ListView.onMeasure(ListView.java:1203)
at android.view.View.measure(View.java:19734)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6120)
at com.android.internal.widget.DialogViewAnimator.onMeasure(DialogViewAnimator.java:64)
at android.view.View.measure(View.java:19734)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6120)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1464)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:758)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:640)
at android.view.View.measure(View.java:19734)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6120)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
at android.view.View.measure(View.java:19734)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6120)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1464)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:758)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:640)
at android.view.View.measure(View.java:19734)
at android.widget.ScrollView.measureChildWithMargins(ScrollView.java:1293)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
at android.widget.ScrollView.onMeasure(ScrollView.java:340)
at android.view.View.measure(View.java:19734)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6120)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:139)
at android.view.View.measure(View.java:19734)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6120)
at android.support.v7.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:400)
at android.view.View.measure(View.java:19734)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:715)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:461)
at android.view.View.measure(View.java:19734)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.measureView(RenderSessionImpl.java:589)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.doLayout(RenderSessionImpl.java:379)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.renderAndBuildResult(RenderSessionImpl.java:534)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.render(RenderSessionImpl.java:422)
at com.android.layoutlib.bridge.BridgeRenderSession.render(BridgeRenderSession.java:104)
at mono.android.DesignerSession.renderInternal(DesignerSession.java:342)