Center MapView on me

shiteiru · by **shiteiru** » Thu May 22, 2008 7:00 pm

thats my code:

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private void initiateView() {
 
        // Get our location
 
        this.myLocation = myLocationManager.getCurrentLocation("gps");
 
        // Our GPS-Latitude and Longitude Coords
 
        Double lat = TrackerActivity.this.myLocation.getLatitude() * 1E6;
 
        Double lng = TrackerActivity.this.myLocation.getLongitude() * 1E6;
 
        Point point = new Point(lat.intValue(), lng.intValue());
 
        myMapController.centerMapTo(point, false); 
 
}
 
Parsed in 0.031 seconds,  using GeSHi 1.0.8.4

simply said.....it doesn' t work at all...i get a nullPointerException...
can' t say why, the code seems correct to me (and i can' t find a hint in the awfull android documentation), at least i get no compiling errors.

Maybe someone can help me out or give me a hint.

cadlg · by **cadlg** » Thu May 22, 2008 7:17 pm

Hi shiteiru

Have you checked if

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this.myLocation = myLocationManager.getCurrentLocation("gps"); 
Parsed in 0.030 seconds,  using GeSHi 1.0.8.4

is really returning something ?

shiteiru · by **shiteiru** » Thu May 22, 2008 8:17 pm

it should, cause i use the coords from

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this.myLocation = myLocationManager.getCurrentLocation("gps");
 
Parsed in 0.033 seconds,  using GeSHi 1.0.8.4

to retrieve my Position and draw it on the map

the thing is......it seems to work with

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MapPoint mp = new MapPoint(lat.intValue(), lng.intValue());
 
Parsed in 0.034 seconds,  using GeSHi 1.0.8.4

but not with

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Point point = new Point(lat.intValue(), lng.intValue());
 
Parsed in 0.035 seconds,  using GeSHi 1.0.8.4

but as a matter of fact i need the second expression to get this line of code to work

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myMapController.centerMapTo(point, false);
Parsed in 0.035 seconds,  using GeSHi 1.0.8.4

well guys.....i'm stuck

cadlg · by **cadlg** » Thu May 22, 2008 8:45 pm

which line of code is causing the nullPointerException ?

shiteiru · by **shiteiru** » Thu May 22, 2008 8:56 pm

this one

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Point point = new Point(lat.intValue(), lng.intValue()); 
 
Parsed in 0.035 seconds,  using GeSHi 1.0.8.4

also it makes no sense at all......at least not to me

plusminus · by **plusminus** » Thu May 22, 2008 9:09 pm

Hello shiteiru,

I do it this way:

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        Point p = new Point((int)(this.mMyLocation.getLatitude() * 1E6),
 
                        (int)(this.mMyLocation.getLongitude() * 1E6));
 
        this.mMapView.getController().animateTo(p); // or centerMapTo
Parsed in 0.036 seconds,  using GeSHi 1.0.8.4

Regards,
plusminus

shiteiru · by **shiteiru** » Thu May 22, 2008 9:24 pm

well...once again you are my saviour

but still......there is smth that makes no sense at all

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Point p = new Point(lat.intValue(),
 
               lng.intValue());
 
     this.mMapView.getController().animateTo(p); // or centerMapTo
 
Parsed in 0.035 seconds,  using GeSHi 1.0.8.4

gives me a nullPointerException (although i declared lat and lng before i use them ^^)

hence

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Point p = new Point((int)(this.mMyLocation.getLatitude() * 1E6),
 
               (int)(this.mMyLocation.getLongitude() * 1E6));
 
     this.mMapView.getController().animateTo(p); // or centerMapTo
 
Parsed in 0.036 seconds,  using GeSHi 1.0.8.4

works just fine...

plusminus · by **plusminus** » Thu May 22, 2008 11:33 pm

Hello shiteiru,

maybe the Auto-Boxing in Android is not correctly supported (AutoBoxing maps trivial double/ints/... to Double/Integer/... Objects)

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Double lat = TrackerActivity.this.myLocation.getLatitude() * 1E6;
Parsed in 0.035 seconds,  using GeSHi 1.0.8.4

Regards,
plusminus

liaowg · by **liaowg** » Wed Jun 04, 2008 7:24 am

I put the call to centerMapTo at the end of onCreate, but get an empty screen, no rendering

liaowg · by **liaowg** » Wed Jun 04, 2008 7:35 am

liaowg wrote:I put the call to centerMapTo at the end of onCreate, but get an empty screen, no rendering

After comment the zoomTo call, render happened, too much tricks

Center MapView on me

Center MapView on me

The appropriate time for centerMapTo(center)?

Re: The appropriate time for centerMapTo(center)?

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