【Android Studio】バックグラウンドで位置情報を追跡したい

###前提・実現したいこと

【Android Studio/Java】
バックグラウンドでも位置情報を追跡したいです

発生している問題・エラーメッセージ

アプリ画面が表示されているときは追跡しますが、アプリがバックグラウンドになると位置情報が変わらなくなります。

Javaソースコード

public class GoogleService extends Service implements LocationListener {

boolean isGPSEnable = false;
boolean isNetworkEnable = false;
double latitude, longitude;
LocationManager locationManager;
Location location;
private Handler mHandler = new Handler();
private Timer mTimer = null;
long notify_interval = 1000;
public static String str_receiver = "servicetutorial.service.receiver";
Intent intent;


public GoogleService() {

}
@Nullable
@Override
public IBinder onBind(Intent intent) {
    return null;
}

@Override
public void onCreate() {
    super.onCreate();

    mTimer = new Timer();
    mTimer.schedule(new TimerTaskToGetLocation(), 5, notify_interval);
    intent = new Intent(str_receiver);
    fn_getlocation();
}

@Override
public void onLocationChanged(Location location) {

}

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

}

@Override
public void onProviderEnabled(String provider) {

}

@Override
public void onProviderDisabled(String provider) {

}

private void fn_getlocation() {
    locationManager = (LocationManager) getApplicationContext().getSystemService(LOCATION_SERVICE);
    isGPSEnable = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
    isNetworkEnable = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);

    if (!isGPSEnable && !isNetworkEnable) {

    } else {

        if (isNetworkEnable) {
            location = null;
            if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                // TODO: Consider calling
                //    ActivityCompat#requestPermissions
                // here to request the missing permissions, and then overriding
                //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
                //                                          int[] grantResults)
                // to handle the case where the user grants the permission. See the documentation
                // for ActivityCompat#requestPermissions for more details.
                return;
            }
            locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1000, 0, this);
            if (locationManager != null) {
                location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                if (location != null) {

                    Log.e("latitude", location.getLatitude() + "");
                    Log.e("longitude", location.getLongitude() + "");

                    latitude = location.getLatitude();
                    longitude = location.getLongitude();
                    fn_update(location);
                }
            }

        }


        if (isGPSEnable) {
            location = null;
            if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                // TODO: Consider calling
                //    ActivityCompat#requestPermissions
                // here to request the missing permissions, and then overriding
                //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
                //                                          int[] grantResults)
                // to handle the case where the user grants the permission. See the documentation
                // for ActivityCompat#requestPermissions for more details.
                return;
            }
            locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 0, this);
            if (locationManager != null) {
                location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
                if (location != null) {
                    Log.e("latitude", location.getLatitude() + "");
                    Log.e("longitude", location.getLongitude() + "");
                    latitude = location.getLatitude();
                    longitude = location.getLongitude();
                    fn_update(location);
                }
            }
        }


    }

}

private class TimerTaskToGetLocation extends TimerTask {
    @Override
    public void run() {

        mHandler.post(new Runnable() {
            @Override
            public void run() {
                fn_getlocation();
            }
        });

    }
}

private void fn_update(Location location) {

    intent.putExtra("latitude", location.getLatitude() + "");
    intent.putExtra("longitude", location.getLongitude() + "");
    sendBroadcast(intent);
 }
}

###permission

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.android.hardware.location.gps"/>
<uses-permission android:name="android.permission.FOREGROUND_SERVICE"/>
<uses-permission android:name="android.permission.ACCESS_BACKGROUND_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />

###Logcat
アプリがフォアグラウンドにある時のLogcatです。毎回位置情報が変化しています。

 2021-08-21 02:29:42.400 8904-8904/com.websarva.wings.android.notification4 E/get_longitude:135.22084902
 2021-08-21 02:29:43.416 8904-8904/com.websarva.wings.android.notification4 E/get_latitude:34.8317199
 2021-08-21 02:29:43.416 8904-8904/com.websarva.wings.android.notification4 E/get_longitude:135.2209639
 2021-08-21 02:29:43.431 8904-8904/com.websarva.wings.android.notification4 E/get_latitude:34.83170759
 2021-08-21 02:29:43.431 8904-8904/com.websarva.wings.android.notification4 E/get_longitude:135.22084902

アプリがバックグラウンドにある時のLogcatです。位置情報が変化していません。1秒ごとに位置情報を表示しようとはしているのでTimerTaskは動いていると思います。

2021-08-21 02:30:28.748 8904-8904/com.websarva.wings.android.notification4 E/get_latitude:34.83170759
2021-08-21 02:30:28.749 8904-8904/com.websarva.wings.android.notification4 E/get_longitude:135.22084902
2021-08-21 02:30:28.766 8904-8904/com.websarva.wings.android.notification4 E/get_latitude:34.83170759
2021-08-21 02:30:28.766 8904-8904/com.websarva.wings.android.notification4 E/get_longitude:135.22084902