how to change marker position on location change in android

Question

I have a Marker on the map and I need to change the position of marker.

Here is my code:

public void onLocationChanged(Location location) {

    map.clear();
    LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
    if (Home_Activity.this.markerob != null) {
        Home_Activity.this.markerob.remove();
        markerob.setPosition(latLng);
    }
    latitude=location.getLatitude();
    longitude=location.getLongitude();
    CameraUpdate cameraUpdate =CameraUpdateFactory.newCameraPosition(new CameraPosition.Builder().target(new LatLng(location.getLatitude(), location.getLongitude())).zoom(18.0f).build());

    MarkerOptions options = new MarkerOptions().position(latLng);
    //options.title( getAddressFromLatLng( latLng ) );

    options.icon(BitmapDescriptorFactory.fromBitmap(Bitmap.createScaledBitmap(
            BitmapFactory.decodeResource(getResources(),
                    spmain.getavatarimage()), 90, 90, false)));

    //map.addMarker(new MarkerOptions().position(latLng));
    Toast.makeText(getApplicationContext(), "lat="+latLng,Toast.LENGTH_SHORT).show();

    options.position(latLng);
    map.getUiSettings().setRotateGesturesEnabled(true);
    map.animateCamera(cameraUpdate);
    map.moveCamera(cameraUpdate);
    map.addMarker(options);


    //locationManager.removeUpdates(this);
}

I have added onLocationChanged method and in that, am getting location details but not move the marker on new location.

are you getting the updated lat long on location change? – Gyanendra Mani Jul 04 '16 at 10:30 — Gyanendra Mani, Jul 04 '16 at 10:30

score 4 · Answer 1 · edited Jul 04 '16 at 12:35

4

Check whether your map has marker added on not (for the very first time). If not then add marker and keep the reference to that marker. For subsequent calls to onLocationChanged just use the same reference to update the latitude and longitude.

    Marker myMarker;
    if(myMarker == null){
       marker = map.addMarker(options);
    } 
    else {
       marker.setPosition(new LatLng(location.getLatitude(),location.getLongitude()));
    }

Hope this helps. Let me know it this does not work. Will post more relevant code.

edited Jul 04 '16 at 12:35

abarisone

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answered Jul 04 '16 at 10:35

apersiankite

531
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1

Variable `myMarker` should be changed to `marker` or am I mistaken? – Brian Jun 17 '20 at 12:10

how to change marker position on location change in android

1 Answers1