Question

I am a new android developer. I am creating a map view application Where I want to set up my map view according distance from my current location. I have three buttons such as 100m,500m and 1 Km . When application is started then mapview will appear and current location is the center of the map. When i tap on 1 km then the map view is set up 1 km according to current location. How can i do this.Thanks in advance.

Answer 1

You have to compute 1km in latitude and longitude, set the center to your current position ( I guess you succed to do that) and set the span to your MapController:

mController.zoomToSpan((int) spanLat,(int) spanLon);

zoomToSpan
public void zoomToSpan(int latSpanE6,int lonSpanE6)

Attempts to adjust the zoom of the map
so that the given span of latitude and
longitude will be displayed. Because
the zoom can only achieve discrete
levels, and because the aspect ratio
of the map may not match the ratio
given, the quality of the fit may
vary. The only thing we guarantee is
that, after the zoom, at least one of
the new latitude or the new longitude
will be within a factor of 2 from the
corresponding parameter.