Android Open Source - sensors2mqtt Sensor Service

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License

The source code is released under:

Eclipse Public License - v 1.0 THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC LICENSE ("AGREEMENT"). ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM CONSTITUTES RECI...

Java Source Code

/*******************************************************************************
 * Copyright (c) 2013 Markus Alexander Kuppe and others. All rights reserved. 
 * This program and the accompanying materials are made available under the terms 
 * of the Eclipse Public License v1.0 which accompanies this distribution, and is
 * available at http://www.eclipse.org/legal/epl-v10.html
 */*from  ww w  .ja  v a2  s  . c  o  m*/
 * Contributors:
 *   Markus Alexander Kuppe - initial API and implementation
 ******************************************************************************/
package org.kuppe.sensors2mqtt;

import java.util.ArrayList;
import java.util.List;
import java.util.Locale;

import org.eclipse.paho.client.mqttv3.MqttClient;
import org.eclipse.paho.client.mqttv3.MqttException;
import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;

import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.hardware.Sensor;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.IBinder;
import android.provider.Settings.Secure;

public class SensorService extends Service {

  static final String HOSTNAME = "HOSTNAME";

  static final String WINDOW_SIZE = "WINDOW_SIZE";

  static final String TOPIC_EXTRA = "TOPIC_EXTRA";

  static final String PORT = "PORT";
  
  private final List<SensorEventListener> listeners = new ArrayList<SensorEventListener>();
  
  private MqttClient client;

  /* (non-Javadoc)
   * @see android.app.Service#onStart(android.content.Intent, int)
   */
  public void onStart(Intent i, int startId) {
    final String hostname = i.getStringExtra(HOSTNAME);
    final String port = i.getStringExtra(PORT);
    final String topicPrefix = i.getStringExtra(TOPIC_EXTRA);
    final String windowSize = i.getStringExtra(WINDOW_SIZE);
    
    try {
      final String deviceId = Secure.getString(getContentResolver(),
          Secure.ANDROID_ID);

      final String url = String.format(Locale.getDefault(),
          "tcp://%s:%s", hostname, port);

      client = new MqttClient(url, deviceId,
          new MemoryPersistence());
      client.connect();

      final SensorManager sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
      final List<Sensor> sensors = sensorManager
          .getSensorList(Sensor.TYPE_LIGHT);

      for (Sensor sensor : sensors) {
        final String topic = sensor.getName().replaceAll("\\s+", "");
        final SensorEventListener mySensorEventListener = new MySensorEventListener(client,
            topicPrefix + topic, Integer.parseInt(windowSize));
        listeners.add(mySensorEventListener);
        sensorManager.registerListener(
            mySensorEventListener, sensor,
            SensorManager.SENSOR_DELAY_FASTEST);
      }
    } catch (MqttException e) {
      e.printStackTrace();
      return;
    }
  }
  
  /* (non-Javadoc)
   * @see android.app.Service#onDestroy()
   */
  public void onDestroy() {
    final SensorManager sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
    for (SensorEventListener listener : listeners) {
      sensorManager.unregisterListener(listener);
    }
    
    if (client != null) {
      try {
        client.disconnect();
        client = null;
      } catch (MqttException e) {
        e.printStackTrace();
      }
    }
  }

  @Override
  public IBinder onBind(Intent intent) {
    // TODO Auto-generated method stub
    return null;
  }
}

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