zoom to fit all markers on map google maps v2

Try using this

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

Check this Google Maps v2 library that i have created that includes this functionalityjust 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 alsolocationManager.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"););        }    });

mMap.moveCamera(CameraUpdateFactory.newLatLngBounds(builder.build(), 15));

After many search I have found the most suitable answer:

//LatLngBound will cover all your marker on Google MapsLatLngBounds.Builder builder = new LatLngBounds.Builder();for (int i = 0; i < latLng.size(); i++) {                        LatLng customMarkerLocation = new LatLng(latLng.get(i).getLat(), latLng.get(i).getLng());                        mMap.addMarker(new MarkerOptions().position(customMarkerLocation).                                icon(BitmapDescriptorFactory.fromBitmap(                                        createCustomMarker(getActivity(), R.drawable.ic_pepsi, "Manish")))).setTitle("iPragmatech Solutions Pvt Lmt");                        builder.include(customMarkerLocation); //include Point to be covered                    }                    LatLngBounds bounds = builder.build();                    int width = getResources().getDisplayMetrics().widthPixels;                    int height = getResources().getDisplayMetrics().heightPixels;                    int padding = (int) (width * 0.15); // offset from edges of the map 15% of screen                    // to animate camera with some padding and bound -cover- all markers                    CameraUpdate cu = CameraUpdateFactory.newLatLngBounds(bounds, width, height, padding);                    mMap.animateCamera(cu);

Reference:Adding custom image in Google Maps Marker, zoom in to keep all markers in the view