Android Map V2 Zoom to Show All the Markers

Android map v2 zoom to show all the markers

You should use the CameraUpdate class to do (probably) all programmatic map movements.

To do this, first calculate the bounds of all the markers like so:

LatLngBounds.Builder builder = new LatLngBounds.Builder();
for (Marker marker : markers) {
    builder.include(marker.getPosition());
}
LatLngBounds bounds = builder.build();

Then obtain a movement description object by using the factory: CameraUpdateFactory:

int padding = 0; // offset from edges of the map in pixels
CameraUpdate cu = CameraUpdateFactory.newLatLngBounds(bounds, padding);

Finally move the map:

googleMap.moveCamera(cu);

Or if you want an animation:

googleMap.animateCamera(cu);

That's all :)

Clarification 1

Almost all movement methods require the Map object to have passed the layout process. You can wait for this to happen using the addOnGlobalLayoutListener construct. Details can be found in comments to this answer and remaining answers. You can also find a complete code for setting map extent using addOnGlobalLayoutListener here.

Clarification 2

One comment notes that using this method for only one marker results in map zoom set to a "bizarre" zoom level (which I believe to be maximum zoom level available for given location). I think this is expected because:

1. The LatLngBounds bounds instance will have northeast property equal to southwest, meaning that the portion of area of the earth covered by this bounds is exactly zero. (This is logical since a single marker has no area.)
2. By passing bounds to CameraUpdateFactory.newLatLngBounds you essentially request a calculation of such a zoom level that bounds (having zero area) will cover the whole map view.
3. You can actually perform this calculation on a piece of paper. The theoretical zoom level that is the answer is +∞ (positive infinity). In practice the Map object doesn't support this value so it is clamped to a more reasonable maximum level allowed for given location.

Another way to put it: how can Map object know what zoom level should it choose for a single location? Maybe the optimal value should be 20 (if it represents a specific address). Or maybe 11 (if it represents a town). Or maybe 6 (if it represents a country). API isn't that smart and the decision is up to you.

So, you should simply check if markers has only one location and if so, use one of:

• CameraUpdate cu = CameraUpdateFactory.newLatLng(marker.getPosition()) - go to marker position, leave current zoom level intact.
• CameraUpdate cu = CameraUpdateFactory.newLatLngZoom(marker.getPosition(), 12F) - go to marker position, set zoom level to arbitrarily chosen value 12.

zoom to fit all markers on map google maps v2

Try using this

//Calculate the markers to get their position
LatLngBounds.Builder b = new LatLngBounds.Builder();
for (Marker m : markers) {
    b.include(m.getPosition());
}
LatLngBounds bounds = b.build();
//Change the padding as per needed
CameraUpdate cu = CameraUpdateFactory.newLatLngBounds(bounds, 25,25,5);
mMap.animateCamera(cu);

Check this Google Maps v2 library that i have created that includes this functionality
just use

Marker m1,m2, m3, m4 .... ;

mapHelper.zoomToFitMarkers(m1,m2, m3, m4 ....);

EDIT :

Get current location

LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
//You can use GPS_PROVIDER also
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, new LocationListener() {

        @Override
        public void onStatusChanged(String provider, int status, Bundle extras) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onProviderEnabled(String provider) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onProviderDisabled(String provider) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onLocationChanged(Location location) {
            // TODO Auto-generated method stub
            currentLatitude = location.getLatitude();
            currentLongitude = location.getLongitude();
            //Add your marker here and zoom to fit it
            //mapHelper.zoomToFitMarkers(m1,m2, m3, m4,mapHelper.addMarker(currentLatitude,currentLongitude,"Current Location"););
        }
    });

android Zoom-to-Fit All Markers on Google Map v2

Try using LatLngBounds :

LatLngBounds.Builder builder = new LatLngBounds.Builder();
builder.include(Latlng1);
builder.include(Latlng2);
LatLngBounds bounds = builder.build();
map.animateCamera(CameraUpdateFactory.newLatLngBounds(bounds, 20));

Google map zoom in between LatLng Bounds

You can get distance between two location through the below function and find the zoom level based on that.

Method to find direct distance between two location

location1.distanceTo(location2);

Now to calculate the radius , use the following. dummy_radius will be half of above value

double circleRad = dummy_radius*1000;//multiply by 1000 to make units in KM

private int getZoomLevel(double radius){
            double scale = radius / 500;
            return ((int) (16 - Math.log(scale) / Math.log(2)));
}

float zoomLevel = getZoomLevel(circleRad);
mGoogleMap.animateCamera(CameraUpdateFactory.newLatLngZoom(LatLon, zoomLevel));

Android maps markers show on map only after zooming change

It needs re-clustering again.

mClusterManager.addItems(markerItemData);
mClusterManager.cluster();

Because, when you add or remove an ClusterItem (MarkerItemData), it just performs the algorithm and calculates clusters. But does not render on map

Finally, ClusterManager listens onCameraIdle event(includes zoom events) and invokes cluster() method internally. This is the answer of user must zoom in or zoom out only then marker is visible.

Google Maps Android API v2 Show marker on zoom level

put below code

googleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(HAMBURG, 15));

here Move the camera instantly to marker with a zoom of 15. if you wanna change zoom level you can change.

Google Maps v2 zoom to specific marker

Look at these code snippets:
https://developers.google.com/maps/documentation/android/

This should be what you're looking for:

GoogleMap map = ((MapFragment) getFragmentManager()
        .findFragmentById(R.id.map)).getMap();

LatLng sydney = new LatLng(-33.867, 151.206);

map.setMyLocationEnabled(true);
map.moveCamera(CameraUpdateFactory.newLatLngZoom(sydney, 13));

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