Mike Mike - 1 year ago 87
Android Question

Center android google map on group of markers?

I have a bunch of markers in which I load onto a google map. My problem is that, the camera is not ontop of the markers. Can I center it on top of all my markers?

I am adding my markers with this code:

for(int i = 0; i < jsonArray.length(); i++) {

String breweryName = jsonArray.getJSONObject(i).getString("brewery");
String lat = jsonArray.getJSONObject(i).getString("lat");
String lng = jsonArray.getJSONObject(i).getString("lng");
String bID = jsonArray.getJSONObject(i).getString("breweryID");

double latD = Double.parseDouble(lat);
double lngD = Double.parseDouble(lng);

m.addMarker(new MarkerOptions()
.position(new LatLng(latD, lngD))


I looked on stack and found this question, which is the same as mine:

Android Google maps API V2 center markers

But there isnt much context behind it and am not sure how to implement it.

Answer Source

You can animate your camera within specific bounds. Let's say you have an ArrayList of markers, something like (this could also be a list of LatLngs, doubles, anything that contains the latitude/longitude for your marker)

List<MarkerOptions> markers = new ArrayList<MarkerOptions>();

You can then make sure they are all visible on your map by doing the following

LatLngBounds.Builder builder = new LatLngBounds.Builder();
LatLng position;
for(int i = 0; i < markers.size(); i++){
    position = markers.get(i).getPosition();
    builder.include(new LatLng(position.latitude, position.longitude));
LatLngBounds bounds = builder.build();
map.animateCamera(CameraUpdateFactory.newLatLngBounds(bounds, 15));
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