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package com.mapbox.mapboxsdk.location;
import android.Manifest;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationManager;
import android.support.annotation.NonNull;
import android.support.v4.content.ContextCompat;
import timber.log.Timber;
import com.mapbox.mapboxsdk.telemetry.TelemetryLocationReceiver;
import com.mapzen.android.lost.api.LocationRequest;
import com.mapzen.android.lost.api.LostApiClient;
import java.util.concurrent.CopyOnWriteArrayList;
import static com.mapzen.android.lost.api.LocationServices.FusedLocationApi;
/**
* Manages locational updates. Contains methods to register and unregister location listeners.
* <ul>
* <li>You can register a {@link LocationListener} with {@link #addLocationListener(LocationListener)} to receive
* location updates.</li>
* <li> You can unregister a {@link LocationListener} with {@link #removeLocationListener(LocationListener)}.</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 LocationServices implements LostApiClient.ConnectionCallbacks,
com.mapzen.android.lost.api.LocationListener {
private static LocationServices instance;
private Context context;
private LostApiClient locationClient;
private Location lastLocation;
private CopyOnWriteArrayList<LocationListener> locationListeners;
private boolean isGpsEnabled;
/**
* Private constructor for singleton LocationServices
*/
private LocationServices(Context context) {
super();
this.context = context;
// Setup location services
locationClient = new LostApiClient.Builder(context).addConnectionCallbacks(this).build();
locationListeners = new CopyOnWriteArrayList<>();
}
/**
* Primary (singleton) access method for LocationServices
*
* @param context Context
* @return LocationServices
*/
public static LocationServices getLocationServices(@NonNull final Context context) {
if (instance == null) {
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 (!areLocationPermissionsGranted()) {
Timber.w("Location Permissions Not Granted Yet. Try again after requesting.");
return;
}
// Disconnect
if (locationClient.isConnected()) {
// Disconnect first to ensure that the new requests are GPS
FusedLocationApi.removeLocationUpdates(locationClient, this);
locationClient.disconnect();
}
isGpsEnabled = enableGPS;
// Setup Fresh
locationClient.connect();
}
@Override
public void onConnected() {
//noinspection MissingPermission
Location lastLocation = FusedLocationApi.getLastLocation(locationClient);
if (lastLocation != null) {
this.lastLocation = lastLocation;
}
LocationRequest locationRequest;
if (isGpsEnabled) {
// LocationRequest Tuned for GPS
locationRequest = LocationRequest.create()
.setFastestInterval(1000)
.setSmallestDisplacement(3.0f)
.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
//noinspection MissingPermission
FusedLocationApi.requestLocationUpdates(locationClient, locationRequest, this);
} else {
// LocationRequest Tuned for PASSIVE
locationRequest = LocationRequest.create()
.setFastestInterval(1000)
.setSmallestDisplacement(3.0f)
.setPriority(LocationRequest.PRIORITY_NO_POWER);
//noinspection MissingPermission
FusedLocationApi.requestLocationUpdates(locationClient, locationRequest, this);
}
}
@Override
public void onConnectionSuspended() {
}
/**
* Returns if the GPS sensor is currently enabled
*
* @return active state of the GPS
*/
public boolean isGpsEnabled() {
return isGpsEnabled;
}
/**
* Called when the location has changed.
*
* @param location The updated location
*/
@Override
public void onLocationChanged(Location location) {
// Timber.d("onLocationChanged()..." + location);
this.lastLocation = location;
// Update Listeners
for (LocationListener listener : this.locationListeners) {
listener.onLocationChanged(location);
}
// Update the Telemetry Receiver
Intent locIntent = new Intent(TelemetryLocationReceiver.INTENT_STRING);
locIntent.putExtra(LocationManager.KEY_LOCATION_CHANGED, location);
context.sendBroadcast(locIntent);
}
/**
* 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);
}
/**
* Check status of Location Permissions
*
* @return True if granted to the app, False if not
*/
public boolean areLocationPermissionsGranted() {
if ((ContextCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION)
!= PackageManager.PERMISSION_GRANTED)
&& (ContextCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED)) {
Timber.w("Location Permissions Not Granted Yet. Try again after requesting.");
return false;
}
return true;
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onProviderEnabled(String provider) {
}
}
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