MyLocationOverlay doesn't appear - android

when I call this method the blue dot is not appearing on the map, until i send location from ddms,
then suddenly it appears.
private void findMyLocation(final Location location){
final MyLocationOverlay myLocationOverlay = new MyLocationOverlay(this, mapView);
myLocationOverlay.enableMyLocation();
myLocationOverlay.enableCompass();
final GeoPoint point = new GeoPoint((int) (location.getLatitude() * 1E6),
(int) (location.getLongitude() * 1E6));
controller.animateTo(point);
controller.setCenter(point);
mapView.getOverlays().add(myLocationOverlay);
mapView.postInvalidate();
}
how can i show that blue dot right after calling this method?
thanks a lot.

how can i show that blue dot right after calling this method?
You can't.
MyLocationOverlay, as its name suggests, shows the user's location. If the device/emulator does not know the user's location, it cannot show it.
In the case of the device, it will not show the user's location until it has determined said location (e.g., GPS).
In the case of the emulator, it will not show the user's location until it has determined said location (e.g., DDMS).

Related

Android mapview geopoint difference emulator and device

i am getting data from gps provider using mylocation class. code is this:
MyLocation.LocationResult locationResult = new MyLocation.LocationResult() {
#Override
public void gotLocation(Location location) {
//Got the location!
// for phone
//currentLocation = new GeoPoint((int) (location.getLatitude() * 1000000),
// (int) (location.getLongitude() * 1000000));
// for emulator
currentLocation = new GeoPoint((int) (location.getLatitude()),
(int) (location.getLongitude()));
doSomething();
}
};
MyLocation myLocation = new MyLocation();
myLocation.getLocation(this, locationResult);
when i use the app in emulator(2.3.3) it shows the correct location without multiplying anything.
but when i use it in a device(4.0) lat and lon need to multiplied with 1000000. i couldn't find why. i don't think its because of the version of android. anyone have any idea?
Because the MapView uses microdegress for its units so you need to multiply by 1e6. Otherwise you show up off the coast of Africa - basically lat long of approximately 0,0
From the documentation on GeoPoint:
An immutable class representing a pair of latitude and longitude, stored as integer numbers of microdegrees.
Don't know why the emulator is working - it shouldn't.

How to set mapview to not show my current location?

how to coding to set mapview don't show the current location
now it's not show on emulater but when I try to install on my mobile , the current location sigh will show
What should I do?
public static int getCoordinateE6(double coordinate) {
return (int) (coordinate * 1E6);
}
GeoPoint geoPoint = new GeoPoint(
GoogleMapServiceHelper.getCoordinateE6(latitude),
GoogleMapServiceHelper.getCoordinateE6(longitude));
getMapView().getController().animateTo(geoPoint);

Unable to find a Location Dynamically in Google-Map

I am facing a problem with the google map search. I have mad a app through which i can see a location in google map on my emulator which is set in the code as:
int lat = (int)(22.3666667*1000000);
int lng = (int)(91.8000000*1000000);
GeoPoint pt = new GeoPoint(lat,lng);
This works fine.
Now i want to search a location dynamically i.e. i have a editbox(Location_For_Search) and a button(Find_Location_Button). So when i write some location in editbox and press the button then it will show the location in google map with a marker on location. How can i do this?
Please any one help me.
With best wishes
Md. Fazla Rabbi
Use the geocoder:
Geocoder geo = new Geocoder(this);
List<Address> addr;
try
{
addr = coder.getFromLocationName(yourEditTextaddr, 10);
Address loc = addr.get(0);
loc.getLatitude();
loc.getLongitude();
point = new GeoPoint((int) (loc.getLatitude() * 1E6),
(int) (loc.getLongitude() * 1E6));
return point;
}

How can I to centered my location with mylocationoverlay?

I can take my location with myLocationOverlay easily, and I want to set as a center of my location, I tried map controller:
MapController mc = myMap.getController();
mc.animateTo();
mc.setCenter(myLocOverlay.getMyLocation());
these code didnt work so I changed
p = new GeoPoint((int) (myLocOverlay.getMyLocation().getLatitudeE6()), (int) (myLocOverlay.getMyLocation().getLongitudeE6()));
mc.setCenter(p);
But there is no good news. I took null pointer exception then I assigned new location before myLocationOverlay() but its not working.. Thanks for advance..
The animateTo can be used for this,
GeoPoint point = this.currentLocationOverlay.getMyLocation();
if(point==null)
return;
//center map on that geopoint
mc.animateTo(point);

Give double value to Geopoint in GoogleMap overlays

I want to point to a Google map location using overlay. For this purpose latitude and longitude values will be assigned to a GeoPoint, but it only accepts int values.
How can I assign it a double value? Or is there another solution to point to an exact location?
point = new GeoPoint((int)t.getLati(),(int)t.getLongi())
Any help would be appreciated.
Since GeoPoint accepts latitudes and longitudes in microdegrees, simply create your point like so:
GeoPoint point = new GeoPoint((int)(latitude * 1e6),
(int)(longitude * 1e6));

Categories

Resources