Android Open Source - android_retrieval_system Location Manager

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License

The source code is released under:
GNU General Public License
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Java Source Code

/*
 * This file is part of Android retrieval system project.
 * //from ww w  . ja v  a2 s.  co m
 * Android retrieval system is free software: you can redistribute it
 * and/or modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 3 of the License,
 * or (at your option) any later version. 
 * 
 * Android retrieval system 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
 * General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with Android retrieval system. If not, see <http://www.gnu.org/licenses/>.
 */

package net.deerhunter.ars.location;

import net.deerhunter.ars.R;
import net.deerhunter.ars.application.ArsApplication;
import net.deerhunter.ars.broadcast_receivers.StartLocationListeningReceiver;
import net.deerhunter.ars.broadcast_receivers.StopLocationListeningReceiver;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;

/**
 * This class is used to start and stop listening of the location.
 * 
 * @author DeerHunter (vityokkv73@gmail.com)
 */
public class LocationManager {
  private static volatile LocationManager instance;

  private LocationManager() {
  }

  /**
   * Gets the instance of the <code>LocationManager</code> class.
   * 
   * @return The instance of the <code>LocationManager</code> class
   */
  public static LocationManager getInstance() {
    LocationManager localInstance = instance;
    if (localInstance == null) {
      synchronized (LocationManager.class) {
        localInstance = instance;
        if (localInstance == null)
          localInstance = instance = new LocationManager();
      }
    }
    return localInstance;
  }

  /**
   * Starts a location controller.
   * 
   * @param startNow Flag that indicates a necessity to start a location
   *            controller now
   */
  public void startLocationController(boolean startNow) {
    SharedPreferences prefs = ArsApplication.getInstance().getAppPrefs();
    Context context = ArsApplication.getInstance().getApplicationContext();
    int startLocationUpdate = 1000;  // 1 sec to start
    if (!startNow)
      startLocationUpdate = 1000 * prefs.getInt(context.getString(R.string.startLocationUpdate),
          ARSLocationListener.START_LOCATION_LISTENING_TIME);
    int locationListeningInterval = 1000 * prefs.getInt(context.getString(R.string.locationListeningInterval),
        ARSLocationListener.LOCATION_LISTENING_INTERVAL);
    int updateLocationPeriod = 1000 * prefs.getInt(context.getString(R.string.updateLocationPeriod),
        ARSLocationListener.UPDATE_PERIOD);

    AlarmManager startLocationListener = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
    Intent startLocationListeningIntent = new Intent(context, StartLocationListeningReceiver.class);
    PendingIntent pendingIntent1 = PendingIntent.getBroadcast(context, 0, startLocationListeningIntent, 0);
    startLocationListener.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + startLocationUpdate,
        locationListeningInterval, pendingIntent1);

    AlarmManager stopLocationListener = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
    Intent stoplocationListeningIntent = new Intent(context, StopLocationListeningReceiver.class);
    PendingIntent pendingIntent2 = PendingIntent.getBroadcast(context, 0, stoplocationListeningIntent, 0);
    stopLocationListener.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + startLocationUpdate
        + updateLocationPeriod, locationListeningInterval, pendingIntent2);
  }

  /**
   * Stops all the alarm managers that start and stop the location listeners
   */
  public void stopAllLocationAlarmManager() {
    Context context = ArsApplication.getInstance().getApplicationContext();
    AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
    Intent startLocationListeningIntent = new Intent(context, StartLocationListeningReceiver.class);
    PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, startLocationListeningIntent, 0);
    Intent stoplocationListeningIntent = new Intent(context, StopLocationListeningReceiver.class);
    PendingIntent pendingIntent2 = PendingIntent.getBroadcast(context, 0, stoplocationListeningIntent, 0);
    alarmManager.cancel(pendingIntent);
    alarmManager.cancel(pendingIntent2);
  }
}
Java Source Code List
