Android map v2 zoom to show all the markers

Question

I have 10 markers in the GoogleMap. I want to zoom in as much as possible and keep all markers in view? In the earlier version this can be achieved from zoomToSpan() but in v2 I have no idea how about doing that. Further, I know the radius of the circle that needs to be visible.

Answer 1

   //For adding a marker in Google map
        MarkerOptions mp = new MarkerOptions();
        mp.position(new LatLng(Double.parseDouble(latitude), Double.parseDouble(longitude)));
        mp.snippet(strAddress);
        map.addMarker(mp);

        try {

            b = new LatLngBounds.Builder();

            if (MapDetailsList.list != null && MapDetailsList.list.size() > 0) {

                for (int i = 0; i < MapDetailsList.list.size(); i++) {

                    b.include(new LatLng(Double.parseDouble(MapDetailsList.list.get(i).getLatitude()),
                            Double.parseDouble(MapDetailsList.list.get(i).getLongitude())));

                }
                LatLngBounds bounds = b.build();

                DisplayMetrics displayMetrics = getResources().getDisplayMetrics();
                int width = displayMetrics.widthPixels;
                int height = displayMetrics.heightPixels;

                // Change the padding as per needed
                CameraUpdate cu = CameraUpdateFactory.newLatLngBounds(bounds, width-200, height-200, 5);
                // map.setCenter(bounds.getCenter());

                map.animateCamera(cu);

            }

        } catch (Exception e) {

        }

http://i64.tinypic.com/2qjybh4.png

http://i63.tinypic.com/flzwus.png

http://i63.tinypic.com/112g5fm.png

Answer 2

I had similar problem, using following code solved the issue:

CameraUpdateFactory.newLatLngBounds(bounds, 200, 200, 5) generally the location differences in my case are no more than two neighbour cities.

zoom to fit all markers on map google maps v2

Answer 3

Google Map V2

The following solution works for Android Marshmallow 6 (API 23, API 24, API 25). It also works in Xamarin.

LatLngBounds.Builder builder = new LatLngBounds.Builder();

//the include method will calculate the min and max bound.
builder.include(marker1.getPosition());
builder.include(marker2.getPosition());
builder.include(marker3.getPosition());
builder.include(marker4.getPosition());

LatLngBounds bounds = builder.build();

int width = getResources().getDisplayMetrics().widthPixels;
int height = getResources().getDisplayMetrics().heightPixels;
int padding = (int) (width * 0.10); // offset from edges of the map 10% of screen

CameraUpdate cu = CameraUpdateFactory.newLatLngBounds(bounds, width, height, padding);

mMap.animateCamera(cu);

Answer 4

Show All Markers with Google map

In these Methods store all Markers and automatically zoom to show all markers in google map.

// Declare the Markers List.
List<MarkerOptions> markerList;
private BitmapDescriptor vnrPoint,banPoint;


public void storeAllMarkers()
{
      markerList=new ArrayList<>();
      markerList.removeAll(markerList);


      // latitude and longitude of Virudhunagar

      double latitude1=9.587209;
      double longitude1=77.951431;
   vnrPoint=BitmapDescriptorFactory.fromResource(R.drawable.location_icon_1);
      LatLng vnr = new LatLng(latitude1, longitude1);
      MarkerOptions vnrMarker = new MarkerOptions();
      vnrMarker.position(vnr);
      vnrMarker.icon(vnrPoint);
      markerList.add(vnrMarker);

      // latitude and longitude of Bengaluru

      double latitude2=12.972442;
      double longitude2=77.580643;

    banPoint=BitmapDescriptorFactory.fromResource(R.drawable.location_icon_2);

      LatLng ban = new LatLng(latitude2, longitude2);
      MarkerOptions bengalureMarker = new MarkerOptions();
      bengalureMarker.position(ban);
      bengalureMarker.icon(banPoint);
      markerList.add(bengalureMarker);

      // You can add any numbers of MarkerOptions like this.

     showAllMarkers();

 }


public void showAllMarkers()
{
    LatLngBounds.Builder builder = new LatLngBounds.Builder();

    for (MarkerOptions m : markerList) {
        builder.include(m.getPosition());
    }

    LatLngBounds bounds = builder.build();

    int width = getResources().getDisplayMetrics().widthPixels;
    int height = getResources().getDisplayMetrics().heightPixels;
    int padding = (int) (width * 0.30); 

    // Zoom and animate the google map to show all markers

    CameraUpdate cu = CameraUpdateFactory.newLatLngBounds(bounds, width, height, padding);
    googleMap.animateCamera(cu);
}

Answer 5

Note - This is not a solution to the original question. This is a solution to one of the subproblems discussed above.

Solution to @andr Clarification 2 -

Its really problematic when there's only one marker in the bounds and due to it the zoom level is set to a very high level (level 21). And Google does not provide any way to set the max zoom level at this point. This can also happen when there are more than 1 marker but they are all pretty close to each other. Then also the same problem will occur.

Solution - Suppose you want your Map to never go beyond 16 zoom level. Then after doing -

CameraUpdate cu = CameraUpdateFactory.newLatLngBounds(bounds, padding);
mMap.moveCamera(cu);

Check if your zoom level has crossed level 16(or whatever you want) -

float currentZoom = mMap.getCameraPosition().zoom;

And if this level is greater than 16, which it will only be if there are very less markers or all the markers are very close to each other, then simply zoom out your map at that particular position only by seting the zoom level to 16.

mMap.moveCamera(CameraUpdateFactory.zoomTo(16));

This way you'll never have the problem of "bizarre" zoom level explained very well by @andr too.

Answer 6

Use the method "getCenterCoordinate" to obtain the center coordinate and use in CameraPosition.

private void setUpMap() {
    mMap.setMyLocationEnabled(true);
    mMap.getUiSettings().setScrollGesturesEnabled(true);
    mMap.getUiSettings().setTiltGesturesEnabled(true);
    mMap.getUiSettings().setRotateGesturesEnabled(true);

    clientMarker = mMap.addMarker(new MarkerOptions()
            .position(new LatLng(Double.valueOf(-12.1024174), Double.valueOf(-77.0262274)))
            .icon(BitmapDescriptorFactory.fromResource(R.mipmap.ic_taxi))
    );
    clientMarker = mMap.addMarker(new MarkerOptions()
            .position(new LatLng(Double.valueOf(-12.1024637), Double.valueOf(-77.0242617)))
            .icon(BitmapDescriptorFactory.fromResource(R.mipmap.ic_location))
    );

    camPos = new CameraPosition.Builder()
            .target(getCenterCoordinate())
            .zoom(17)
            .build();
    camUpd3 = CameraUpdateFactory.newCameraPosition(camPos);
    mMap.animateCamera(camUpd3);
}


public LatLng getCenterCoordinate(){
    LatLngBounds.Builder builder = new LatLngBounds.Builder();
    builder.include(new LatLng(Double.valueOf(-12.1024174), Double.valueOf(-77.0262274)));
    builder.include(new LatLng(Double.valueOf(-12.1024637), Double.valueOf(-77.0242617)));
    LatLngBounds bounds = builder.build();
    return bounds.getCenter();
}