android mapview only loading one tile
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I have a mapview and it seems to be only loading one tile in the immediate viewing area.

When scrolling any direction it will not fetch new map tile data, and when zooming in or out it will not fetch new data.

I have tried calling the MapView's `invalidate()` methods on my UI and `postInvalidate()` as well, but these don't seem to have an effect at all.

Some devices never show the mapview anytime.

Do I have to override many methods? I do not remember needing to do this in the past. Is there a super complete mapview example project I can view?

Thanks