en utilisant géocodage avec myLocationOverlay
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28-10-2019 - |
Question
i essayer d'obtenir le code actuel de la longitude et la latitude qui MyLocationOverlay offre et mettre à un EditView sur mon activité.
Les heurtes d'activité lorsque je tente d'obtenir la longitude et la latitude de MyLocationOverlay.
Quel est le problème avec ce code?
Cordialement, flotteur
sortie LogCat: http://codepaste.net/vs6itk Ligne 59 est la ligne suivante:
double currentLatitude = myLocationOverlay.getMyLocation().getLatitudeE6();
Voici mon code:
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.partner_suche);
final EditText tView = (EditText) findViewById(R.id.editTextPLZ);
final MapView mView = (MapView) findViewById(R.id.mapview);
mView.getController().setZoom(14);
List<Overlay> mapOverlays = mView.getOverlays();
myLocationOverlay = new MyCustomLocationOverlay(this, mView);
mapOverlays.add(myLocationOverlay);
myLocationOverlay.enableMyLocation();
myLocationOverlay.enableCompass();
myLocationOverlay.runOnFirstFix(new Runnable() {
public void run() {
mView.getController().animateTo(myLocationOverlay.getMyLocation());
}
});
Geocoder gc = new Geocoder(this, Locale.getDefault());
double currentLatitude = myLocationOverlay.getMyLocation().getLatitudeE6();
double currentLongitute = myLocationOverlay.getMyLocation().getLongitudeE6();
try
{
List<Address> addresses = gc.getFromLocation(currentLatitude, currentLongitute, 1);
if (addresses.size() > 0)
{
tView.setText(addresses.get(0).getLocality());
}
} catch (IOException e)
{
}
}
EDIT: J'ai créé un LocationListener pour obtenir mon emplacement actuel. Maintenant, la partie se bloque lorsque je tente d'exécuter gc.getFromLocation (latitude, longitude, 1); Je ne peux pas lire l'exception? : /
LocationManager locationManager;
String context = Context.LOCATION_SERVICE;
locationManager = (LocationManager)getSystemService(context);
String provider = LocationManager.GPS_PROVIDER;
LocationListener locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
updateWithNewLocation(location);
}
public void onProviderDisabled(String provider){
updateWithNewLocation(null);
}
public void onProviderEnabled(String provider){ }
public void onStatusChanged(String provider, int status,Bundle extras){ }
};
locationManager.requestLocationUpdates(provider, 0, 0, locationListener);
private void updateWithNewLocation(Location location) {
final EditText tView = (EditText) findViewById(R.id.editTextPLZ);
double latitude = location.getLatitude();
double longitude = location.getLongitude();
Geocoder gc = new Geocoder(this, Locale.getDefault());
if (location != null) {
try
{
List<Address> addresses = gc.getFromLocation(latitude, longitude, 1);
if (addresses.size() > 0)
{
Address address = addresses.get(0);
for (int i = 0; i < address.getMaxAddressLineIndex(); i++){
tView.setText(address.getPostalCode());
}
}
} catch (Exception e)
{
}
}
}
La solution
If you are using an emulator API level 8 or 9, and getting the exception:
java.io.IOException: Service not Available
then it is a known bug, see service not available
It works OK on real devices and emulator level 7 though. ( You should probably put a trap on addresses being null too, though this won't make the geocoder work!)
Autres conseils
Most likely the location being returned from
myLocationOverlay.getMyLocation()
or
Location location = locationManager.getLastKnownLocation(provider);
is NULL. Likely due to your application not yet having received a location fix, and having no previously saved locations.
Try moving the code block where you do the geocoding into your runnable that runs after receiving a fix. Like this:
myLocationOverlay.runOnFirstFix(new Runnable() {
public void run() {
Location loc = myLocationOverlay.getMyLocation();
if (loc != null) {
mView.getController().animateTo(loc);
Geocoder gc = new Geocoder(this, Locale.getDefault());
double currentLatitude = loc.getLatitudeE6();
double currentLongitute = loc.getLongitudeE6();
try
{
List<Address> addresses = gc.getFromLocation(currentLatitude, currentLongitute, 1);
if (addresses.size() > 0)
{
tView.setText(addresses.get(0).getLocality());
}
} catch (IOException e)
{
}
}
}
});