How to get current position GPs without an activity?

I've implemented a JobService and need to capture the user's current location, but implementation requires a "Context" or "Activity". But it is a job processing and I do not have an open Context or Activity.

The doInBackground method runs from time to time ....

How to implement? Follow my JobService

import android.annotation.SuppressLint;
import android.os.AsyncTask;
import android.util.Log;

import com.firebase.jobdispatcher.JobParameters;
import com.firebase.jobdispatcher.JobService;

public class JobSchedulerService extends JobService {

    public static final String TAG = "LOG";

    @Override
    public boolean onStartJob(final JobParameters job) {
        // TODO salva as coordenadas no banco local
        Log.i(TAG, "Executando");

        @SuppressLint("StaticFieldLeak") AsyncTask backgroundTask = new AsyncTask() {
            @Override
            protected Object doInBackground(Object[] objects) {
                // TODO envia os dados pro banco na internet
                Log.i(TAG, "Executando background");

                return null;
            }

            @Override
            protected void onPostExecute(Object o) {
                jobFinished(job, true);
            }
        };
        backgroundTask.execute();
        return true; //Ainda há algo a ser executado?
    }

    @Override
    public boolean onStopJob(com.firebase.jobdispatcher.JobParameters job) {
        // Se houver erro, essa função será chamada
        // return true para tentar novamente
        return true;
    }


}