import com.mapbox.services.android.telemetry.location.LocationEngineListener; //导入依赖的package包/类
/**
 * Connect all the location listeners.
 *
 * @since 2.2.0
 */
@Override
public void activate() {
  for (LocationEngineListener listener : locationListeners) {
    listener.onConnected();
  }
}
 

import com.mapbox.services.android.telemetry.location.LocationEngineListener; //导入依赖的package包/类
/**
 * Removes location updates for the LocationListener.
 *
 * @since 2.2.0
 */
@Override
public void removeLocationUpdates() {
  for (LocationEngineListener listener : listeners) {
    listeners.remove(listener);
  }
}
 

import com.mapbox.services.android.telemetry.location.LocationEngineListener; //导入依赖的package包/类
private void sendLocationUpdate(Location location) {
  if (location == null) {
    return;
  }
  for (LocationEngineListener listener : locationListeners) {
    listener.onLocationChanged(location);
  }
}
 

import com.mapbox.services.android.telemetry.location.LocationEngineListener; //导入依赖的package包/类
@Override
public void onConnected(@Nullable Bundle bundle) {
  for (LocationEngineListener listener : locationListeners) {
    listener.onConnected();
  }
}
 

import com.mapbox.services.android.telemetry.location.LocationEngineListener; //导入依赖的package包/类
@Override
public void onLocationChanged(Location location) {
  for (LocationEngineListener listener : locationListeners) {
    listener.onLocationChanged(location);
  }
}
 

import com.mapbox.services.android.telemetry.location.LocationEngineListener; //导入依赖的package包/类
@Override
protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);

  // Mapbox access token is configured here. This needs to be called either in your application
  // object or in the same activity which contains the mapview.
  Mapbox.getInstance(this, getString(R.string.access_token));

  // This contains the MapView in XML and needs to be called after the account manager
  setContentView(R.layout.activity_simple_mapview);

  mapView = (MapView) findViewById(R.id.mapView);
  mapView.onCreate(savedInstanceState);

  LocationEngineProvider locationEngineProvider = new LocationEngineProvider(this);
  locationEngine = locationEngineProvider.obtainBestLocationEngineAvailable();

  locationEngineListener = new LocationEngineListener() {
    @Override
    public void onConnected() {
      locationEngine.requestLocationUpdates();
    }

    @Override
    public void onLocationChanged(Location location) {
      if (map != null) {
        map.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(location), 16));
      }
    }
  };
  mapView.getMapAsync(new OnMapReadyCallback() {
    @Override
    public void onMapReady(MapboxMap mapboxMap) {

      // Customize map with markers, polylines, etc.
      map = mapboxMap;
      Location lastLocation = locationEngine.getLastLocation();
      if (lastLocation != null) {
        map.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(lastLocation), 16));
      }
    }
  });
  locationEngine.addLocationEngineListener(locationEngineListener);
  setAmbientEnabled();
}