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When I receive a geocode response from the GeoCode service from Google, it contains a recommended viewport describe as Lat/Lng pairs.
How can I zoom in/out to the recommended viewport ?
The answer to this problem is to use MapController.zoomToSpan(…).
Find the difference between the North/East coordinates and the South/West coordinates and then call the zoomToSpan method.
Fuller description can be found here Getting map zoom level for given bounds on Android like on JS Google Maps API: map.getBoundsZoomLevel(bounds) in user640688 posting.