why the SketchEditor always is null in xamarin.Android

[xipeng]

I want to draw polyline use SketchEditor in Android, but this SketchEditor always is null,why?

my code as follow：

btnEdit = FindViewById<Button>(Resource.Id.button1);
btnEdit.Click += (s, e) => {
try
{
SketchEditor se = new SketchEditor();
this._mapView.SketchEditor = se;
this._mapView.SketchEditor.StartAsync(SketchCreationMode.Polyline);
}
catch(Exception ex)
{
}

Really looking forward to answer 

thanks

[PreetiMaske · Accepted solution]

We are aware of this issue. This bug is already logged in our bug tracking system. We will try to get this fixed in upcoming release in summer. At this point , the workaround would be to create the layout in the activity and add the MapView from within the activity.

 protected override void OnCreate(Bundle bundle)
{
 base.OnCreate(bundle);
 layout = new LinearLayout(this) { Orientation = Orientation.Vertical };
 new MapView();
 Map = new Map(Basemap.CreateImagery());

 ButtonStart = new Button(this);
 Text = "Start";
 Click += BtnClickAsync;

 AddView(ButtonStart);
 AddView(_mapView);
 layout);
}
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[xipeng]

thanks for your answer, expect to fix the bug at early date