| Methods Summary |
|---|
| public synchronized android.location.Country | detectCountry()Start detecting the country.
Queries the location from all location providers, then starts a thread to query the
country from GeoCoder.
if (mLocationListeners != null) {
throw new IllegalStateException();
}
// Request the location from all enabled providers.
List<String> enabledProviders = getEnabledProviders();
int totalProviders = enabledProviders.size();
if (totalProviders > 0) {
mLocationListeners = new ArrayList<LocationListener>(totalProviders);
for (int i = 0; i < totalProviders; i++) {
String provider = enabledProviders.get(i);
if (isAcceptableProvider(provider)) {
LocationListener listener = new LocationListener () {
@Override
public void onLocationChanged(Location location) {
if (location != null) {
LocationBasedCountryDetector.this.stop();
queryCountryCode(location);
}
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
};
mLocationListeners.add(listener);
registerListener(provider, listener);
}
}
mTimer = new Timer();
mTimer.schedule(new TimerTask() {
@Override
public void run() {
mTimer = null;
LocationBasedCountryDetector.this.stop();
// Looks like no provider could provide the location, let's try the last
// known location.
queryCountryCode(getLastKnownLocation());
}
}, getQueryLocationTimeout());
} else {
// There is no provider enabled.
queryCountryCode(getLastKnownLocation());
}
return mDetectedCountry;
|
| protected java.lang.String | getCountryFromLocation(android.location.Location location)
String country = null;
Geocoder geoCoder = new Geocoder(mContext);
try {
List<Address> addresses = geoCoder.getFromLocation(
location.getLatitude(), location.getLongitude(), 1);
if (addresses != null && addresses.size() > 0) {
country = addresses.get(0).getCountryCode();
}
} catch (IOException e) {
Slog.w(TAG, "Exception occurs when getting country from location");
}
return country;
|
| protected java.util.List | getEnabledProviders()
if (mEnabledProviders == null) {
mEnabledProviders = mLocationManager.getProviders(true);
}
return mEnabledProviders;
|
| protected android.location.Location | getLastKnownLocation()
List<String> providers = mLocationManager.getAllProviders();
Location bestLocation = null;
for (String provider : providers) {
Location lastKnownLocation = mLocationManager.getLastKnownLocation(provider);
if (lastKnownLocation != null) {
if (bestLocation == null ||
bestLocation.getElapsedRealtimeNanos() <
lastKnownLocation.getElapsedRealtimeNanos()) {
bestLocation = lastKnownLocation;
}
}
}
return bestLocation;
|
| protected long | getQueryLocationTimeout()
return QUERY_LOCATION_TIMEOUT;
|
| protected boolean | isAcceptableProvider(java.lang.String provider)
// We don't want to actively initiate a location fix here (with gps or network providers).
return LocationManager.PASSIVE_PROVIDER.equals(provider);
|
| private synchronized void | queryCountryCode(android.location.Location location)Start a new thread to query the country from Geocoder.
if (location == null) {
notifyListener(null);
return;
}
if (mQueryThread != null) return;
mQueryThread = new Thread(new Runnable() {
@Override
public void run() {
String countryIso = null;
if (location != null) {
countryIso = getCountryFromLocation(location);
}
if (countryIso != null) {
mDetectedCountry = new Country(countryIso, Country.COUNTRY_SOURCE_LOCATION);
} else {
mDetectedCountry = null;
}
notifyListener(mDetectedCountry);
mQueryThread = null;
}
});
mQueryThread.start();
|
| protected void | registerListener(java.lang.String provider, android.location.LocationListener listener)Register a listener with a provider name
mLocationManager.requestLocationUpdates(provider, 0, 0, listener);
|
| public synchronized void | stop()Stop the current query without notifying the listener.
if (mLocationListeners != null) {
for (LocationListener listener : mLocationListeners) {
unregisterListener(listener);
}
mLocationListeners = null;
}
if (mTimer != null) {
mTimer.cancel();
mTimer = null;
}
|
| protected void | unregisterListener(android.location.LocationListener listener)Unregister an already registered listener
mLocationManager.removeUpdates(listener);
|
