I have an AbsoluteLayout that contains a MapView. I load this layout in my
Activity (which is a MapActivity) like this:
m_layout = LayoutInflater.Inflate(Resource.Layout.DriverLayout, null);
SetContentView(m_layout);
And the MapView shows up on the screen and works just fine.
The MapView is defined in the layout like this:
<com.google.android.maps.MapView
android:id="@+id/DriverMap"
android:layout_width="800px"
android:layout_height="400px"
android:layout_x="0px"
android:layout_y="100px"
android:clickable="true"
android:apiKey="mykey" />
Later on in my app, I'd like to get hold of this MapView so I can zoom in on
it, but I'm having difficulty.
My first attempt returned null:
var m = m_layout.FindViewById<MapView>(Resource.Id.DriverMap);
A more generic version with a cast fails (i.e. code doesn't continue to run
past this point - assuming the cast failed)
var m = (MapView)m_layout.FindViewById (Resource.Id.DriverMap);
So I tried without a cast:
var m = m_layout.FindViewById (Resource.Id.DriverMap) as
Android.GoogleMaps.MapView;
And again I get back a null;
So I tried this:
var m = m_layout.FindViewById(Resource.Id.DriverMap);
And I *do* get back an object - just not a MapView. I run this:
var mt = m.GetType().Name;
And I get back "ViewGroupInvoker"
My GoogleFu fails to even find what this type is. Obviously it's related to a
ViewGroup, but I've not explicitly created one (maybe the MapView does?). So I
guess I have a couple questions:
1. How do I get access to my MapView? I mean that's really what I want.
2. Why am I getting back this "ViewGroupInvoker" and what is it? Getting the
right answer (#1) is good, but understanding the failure is also important so I
don't fall into this again.
-Chris
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