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package com.mapbox.mapboxsdk.location;
import android.content.Context;
import android.location.Location;
import android.support.annotation.NonNull;
import com.mapzen.android.lost.api.LocationRequest;
import com.mapzen.android.lost.api.LostApiClient;
import java.util.ArrayList;
import java.util.List;
public class LocationServices implements com.mapzen.android.lost.api.LocationListener {
private static LocationServices instance = null;
private LostApiClient mLocationClient;
private LocationRequest mLocationRequest;
private Location lastLocation = null;
private List<LocationListener> locationListeners = null;
private boolean isGPSEnabled = false;
/**
* Private constructor for singleton LocationServices
*/
private LocationServices(Context context) {
super();
// Setup location services
mLocationClient = new LostApiClient.Builder(context).build();
locationListeners = new ArrayList<>();
}
/**
* Primary (singleton) access method for LocationServices
* @param context Context
* @return LocationServices
*/
public static LocationServices getLocationServices(@NonNull final Context context) {
if (instance == null) {
if (context == null) {
throw new NullPointerException("Context required for accessing LocationServices");
}
instance = new LocationServices(context.getApplicationContext());
}
return instance;
}
/**
* Enabled / Disable GPS focused location tracking
*
* @param enableGPS true if GPS is to be enabled, false if GPS is to be disabled
*/
public void toggleGPS(boolean enableGPS) {
if (enableGPS) {
if (mLocationClient.isConnected()) {
// Disconnect first to ensure that the new requests are GPS
com.mapzen.android.lost.api.LocationServices.FusedLocationApi.removeLocationUpdates(this);
mLocationClient.disconnect();
}
// Setup Fresh
mLocationClient.connect();
Location lastLocation = com.mapzen.android.lost.api.LocationServices.FusedLocationApi.getLastLocation();
if (lastLocation != null) {
this.lastLocation = lastLocation;
}
// LocationRequest Tuned for GPS
mLocationRequest = LocationRequest.create()
.setFastestInterval(1000)
.setSmallestDisplacement(3.0f)
.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
com.mapzen.android.lost.api.LocationServices.FusedLocationApi.requestLocationUpdates(mLocationRequest, this);
} else {
// Disconnect
if (mLocationClient.isConnected()) {
// Disconnect first to ensure that the new requests are GPS
com.mapzen.android.lost.api.LocationServices.FusedLocationApi.removeLocationUpdates(this);
mLocationClient.disconnect();
}
}
isGPSEnabled = enableGPS;
}
public boolean isGPSEnabled() {
return isGPSEnabled;
}
@Override
public void onLocationChanged(Location location) {
this.lastLocation = location;
// Update Listeners
for (LocationListener listener : this.locationListeners) {
listener.onLocationChanged(location);
}
}
/**
* Last known location
* @return Last known location data
*/
public Location getLastLocation() {
return lastLocation;
}
/**
* Registers a LocationListener to receive location updates
* @param locationListener LocationListener
*/
public void addLocationListener(@NonNull LocationListener locationListener) {
if(!this.locationListeners.contains(locationListener)){
this.locationListeners.add(locationListener);
}
}
/**
* Unregister a LocationListener to stop receiving location updates
* @param locationListener LocationListener to remove
* @return True if LocationListener was found and removed, False if it was not
*/
public boolean removeLocationListener(@NonNull LocationListener locationListener) {
return this.locationListeners.remove(locationListener);
}
}
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