Android Basics : Learn how to track Location changes by adding a LocationListener

In order to use the Location Service you need to do the following:

• Implement LocationListener

LocationListener locationListener = new LocationListener() {
    @Override
    public void onLocationChanged(Location location) {
        if (lastLocation == null) {
            lastLocation = location;
        }
        distanceInMetres += location.distanceTo(lastLocation);
    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {

    }

    @Override
    public void onProviderEnabled(String provider) {

    }

    @Override
    public void onProviderDisabled(String provider) {

    }
};

• Create LocationManager using the Listener to start tracking user location changes

LocationManager locationManager = (LocationManager)
        getSystemService(Context.LOCATION_SERVICE);
if (ActivityCompat.checkSelfPermission(this,
        Manifest.permission.ACCESS_FINE_LOCATION) != 
            PackageManager.PERMISSION_GRANTED
        && ActivityCompat.checkSelfPermission(this,
        Manifest.permission.ACCESS_COARSE_LOCATION) != 
            PackageManager.PERMISSION_GRANTED) {
    return;
}
locationManager.requestLocationUpdates(
        LocationManager.GPS_PROVIDER,
        1000,
        1,
        locationListener);

• Add Permissions to the Manifest file.

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />

The Source Code for this implementation is available here

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