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package com.mapbox.mapboxsdk.location;
import android.content.Context;
import android.location.Location;
import android.util.Log;
import com.mapbox.services.android.telemetry.location.LocationEngine;
import com.mapbox.services.android.telemetry.location.LocationEngineListener;
import com.mapbox.services.android.telemetry.location.LocationEnginePriority;
import com.mapbox.services.android.telemetry.permissions.PermissionsManager;
import com.mapzen.android.lost.api.LocationListener;
import com.mapzen.android.lost.api.LocationRequest;
import com.mapzen.android.lost.api.LocationServices;
import com.mapzen.android.lost.api.LostApiClient;
import java.lang.ref.WeakReference;
/**
* Manages locational updates. Contains methods to register and unregister location listeners.
* <ul>
* <li>You can register a LocationEngineListener with LocationSource#addLocationEngineListener(LocationEngineListener)
* to receive location updates.</li>
* <li> You can unregister a LocationEngineListener with
* LocationEngine#removeLocationEngineListener(LocationEngineListener)} to stop receiving location updates.</li>
* </ul>
* <p>
* Note: If registering a listener in your Activity.onStart() implementation, you should unregister it in
* Activity.onStop(). (You won't receive location updates when paused, and this will cut down on unnecessary system
* overhead). Do not unregister in Activity.onSaveInstanceState(), because this won't be called if the user moves back
* in the history stack.
* </p>
*/
public class LocationSource extends LocationEngine implements
LostApiClient.ConnectionCallbacks, LocationListener {
private static final String LOG_TAG = LocationSource.class.getSimpleName();
private static LocationEngine instance;
private WeakReference<Context> context;
private LostApiClient lostApiClient;
private LocationSource(Context context) {
super();
this.context = new WeakReference<>(context);
lostApiClient = new LostApiClient.Builder(this.context.get())
.addConnectionCallbacks(this)
.build();
}
public static synchronized LocationEngine getLocationEngine(Context context) {
if (instance == null) {
instance = new LocationSource(context.getApplicationContext());
}
return instance;
}
@Override
public void activate() {
if (lostApiClient != null && !lostApiClient.isConnected()) {
lostApiClient.connect();
}
}
@Override
public void deactivate() {
if (lostApiClient != null && lostApiClient.isConnected()) {
lostApiClient.disconnect();
}
}
@Override
public boolean isConnected() {
return lostApiClient.isConnected();
}
@Override
public void onConnected() {
for (LocationEngineListener listener : locationListeners) {
listener.onConnected();
}
}
@Override
public void onConnectionSuspended() {
Log.d(LOG_TAG, "Connection suspended.");
}
@Override
public Location getLastLocation() {
if (lostApiClient.isConnected() && PermissionsManager.areLocationPermissionsGranted(context.get())) {
//noinspection MissingPermission
return LocationServices.FusedLocationApi.getLastLocation(lostApiClient);
}
return null;
}
@Override
public void requestLocationUpdates() {
// Common params
LocationRequest request = LocationRequest.create()
.setInterval(1000)
.setFastestInterval(1000)
.setSmallestDisplacement(3.0f);
// Priority matching is straightforward
if (priority == LocationEnginePriority.NO_POWER) {
request.setPriority(LocationRequest.PRIORITY_NO_POWER);
} else if (priority == LocationEnginePriority.LOW_POWER) {
request.setPriority(LocationRequest.PRIORITY_LOW_POWER);
} else if (priority == LocationEnginePriority.BALANCED_POWER_ACCURACY) {
request.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
} else if (priority == LocationEnginePriority.HIGH_ACCURACY) {
request.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}
if (lostApiClient.isConnected() && PermissionsManager.areLocationPermissionsGranted(context.get())) {
//noinspection MissingPermission
LocationServices.FusedLocationApi.requestLocationUpdates(lostApiClient, request, this);
}
}
@Override
public void removeLocationUpdates() {
if (lostApiClient.isConnected()) {
LocationServices.FusedLocationApi.removeLocationUpdates(lostApiClient, this);
}
}
@Override
public void onLocationChanged(Location location) {
for (LocationEngineListener listener : locationListeners) {
listener.onLocationChanged(location);
}
}
}
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