GoogleMaps v2 - How to know when blue dot is diplayed

Question

I want to know if is it possible to be aware when GoogleMaps provides/displays the blue dot which represents the current location of the user.
In fact, i'd like to display a progress bar until that blue dot is provided, that's why I have to know when the latter is available.
I'm currently using the LocationClient class to get user's location after calling the connect() method but I actually can't determine when it gets a good location fix (represented by the blue dot).
I also want to zoom in the location found when it is available, that's why i'm using this callback function which sometimes zoom in a wrong location if a fix hasn't be found yet.

private LocationResult locDepart = new LocationResult() {       
    @Override
    public void gotLocation(Location location) {    
        Location loc = location;
        if (loc != null) {
            LatLng coordonnees = new LatLng(loc.getLatitude(), loc.getLongitude());
            final CameraPosition cameraPosition = new CameraPosition.Builder()
            .target(coordonnees)      // Sets the center of the map to Mountain View
            .zoom(18)                   // Sets the zoom
            .bearing(90)                // Sets the orientation of the camera to east
            .tilt(10)                   // Sets the tilt of the camera to 30 degrees
            .build();                   // Creates a CameraPosition from the builder
            runOnUiThread(new Runnable () {
                @Override
                public void run() {
                    map.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
                }           
            });
        } 
        mHandler.sendEmptyMessage(0);
    }
};

Thanks for your answers.

score 0 · Answer 1 · answered Aug 21 '13 at 11:08

0

You can replace built-in my location feature with own marker, so showing progress bar (or busy) unless location fix is provided by location provider should be trivial

answered Aug 21 '13 at 11:08

Marcin Orlowski

72,056
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In fact, the blue dot is efficient so if I could keep him not using my own marker, I'll do it. My app is for short distance so I have to be the most accurate possible. – Sw4Tish Aug 21 '13 at 11:10
Dot cannot be efficient. It's just image. So you can easily be as efficient as the dot by listening to location provider yourself – Marcin Orlowski Aug 21 '13 at 14:04

score 0 · Accepted Answer · answered Aug 22 '13 at 08:33

0

Use

googleMap.setOnMyLocationChangeListener(new GoogleMap.OnMyLocationChangeListener() {
    ...
});

to make yourself aware of when blue dot's position changes.

If you set it before enabling myLocation dot, you should be called back when it first appears.

answered Aug 22 '13 at 08:33

MaciejGórski

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Thanks for your answer, I've already checked it and the interface is deprecated so I'm using LocationClient instead – Sw4Tish Aug 22 '13 at 08:37
@Sw4Tish The deprecation is incorrect IMHO. Treat `setOnMyLocationChangeListener` as a convenience method for what you can achieve using `LocationClient` with a lot of unnecessary code. See a discussion I made with myself [in this question](http://stackoverflow.com/questions/16971309/google-maps-android-api-v2-apis-related-to-my-location-deprecated-why). – MaciejGórski Aug 22 '13 at 08:40
I've read it and I must admit I agree with you because as you said it's a convenience method. Since I think I can't achieve what I desire I might use this instead. Give you accepted answer. – Sw4Tish Aug 22 '13 at 08:48

GoogleMaps v2 - How to know when blue dot is diplayed

2 Answers2