Gadgetbridge/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/externalevents/gps/GBLocationListener.java

91 lines
3.4 KiB
Java

/* Copyright (C) 2022-2024 illis, José Rebelo
This file is part of Gadgetbridge.
Gadgetbridge is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Gadgetbridge is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
package nodomain.freeyourgadget.gadgetbridge.externalevents.gps;
import android.location.Location;
import android.location.LocationListener;
import android.os.Bundle;
import android.os.SystemClock;
import androidx.annotation.NonNull;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import nodomain.freeyourgadget.gadgetbridge.GBApplication;
import nodomain.freeyourgadget.gadgetbridge.devices.EventHandler;
import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
/**
* An implementation of a {@link LocationListener} that forwards the location updates to the
* provided {@link EventHandler}.
*/
public class GBLocationListener implements LocationListener {
private static final Logger LOG = LoggerFactory.getLogger(GBLocationListener.class);
private final GBDevice device;
private Location previousLocation;
// divide by 3.6 to get km/h to m/s
private static final double SPEED_THRESHOLD = 1.0 / 3.6;
public GBLocationListener(final GBDevice device) {
this.device = device;
}
@Override
public void onLocationChanged(@NonNull final Location location) {
LOG.info("Location changed: {}", location);
// Correct the location time
location.setTime(getLocationTimestamp(location));
// The location usually doesn't contain speed, compute it from the previous location
// Some devices report hasSpeed() as true, and yet only return a 0 value, so we have to check against a speed threshold
boolean hasValidSpeed = location.hasSpeed() && (location.getSpeed() > SPEED_THRESHOLD);
if (previousLocation != null && !hasValidSpeed) {
long timeInterval = (location.getTime() - previousLocation.getTime());
float distanceInMeters = previousLocation.distanceTo(location);
location.setSpeed(distanceInMeters / timeInterval * 1000L);
}
previousLocation = location;
GBApplication.deviceService(device).onSetGpsLocation(location);
}
@Override
public void onProviderDisabled(@NonNull final String provider) {
LOG.info("onProviderDisabled: {}", provider);
}
@Override
public void onProviderEnabled(@NonNull final String provider) {
LOG.info("onProviderDisabled: {}", provider);
}
@Override
public void onStatusChanged(final String provider, final int status, final Bundle extras) {
LOG.info("onStatusChanged: {}, {}", provider, status);
}
private static long getLocationTimestamp(final Location location) {
long nanosSinceLocation = SystemClock.elapsedRealtimeNanos() - location.getElapsedRealtimeNanos();
return System.currentTimeMillis() - (nanosSinceLocation / 100_000L);
}
}