Android Open Source - sensors2mqtt My Sensor Event Listener

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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
 */* w  w w  . j a va  2s. c  o m*/
 * Contributors:
 *   Markus Alexander Kuppe - initial API and implementation
 ******************************************************************************/
package org.kuppe.sensors2mqtt;

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

import org.eclipse.paho.client.mqttv3.MqttClient;

import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.util.Log;

public class MySensorEventListener implements SensorEventListener {

  private static final String TAG = "org.kuppe.sensors2mqtt";
  
  private List<Float> readings = new ArrayList<Float>();

  private final MqttClient client;
  private final String topic;
  private final int windowSize;

  public MySensorEventListener(MqttClient client, String topic, int windowSize) {
    this.client = client;
    this.topic = topic;
    this.windowSize = windowSize;
  }

  // send via mqtt
  @SuppressWarnings("unchecked")
  @Override
  public void onSensorChanged(SensorEvent event) {
    //TODO for temperature readings the first value is set
    readings.add(event.values[0]);
    Log.d(TAG, "Sensorreading");
    
    // If this listener has received more than WINDOW_SIZE readings, lets
    // denoise/remove outliers.
    // TODO Not sure if the event listener is indeed called concurrently by
    // the underlying OS. But better be safe than sorry.
    if (readings.size() > windowSize) {
      synchronized (readings) {
        if (readings.size() > windowSize) {
          Log.d(TAG, "DenoiseAndPush");
          final List<Float> c = readings;
          readings = new ArrayList<Float>(windowSize);
          new MyAsyncTask(client, topic).execute(c);
        }
      }
    }
  }

  @Override
  public void onAccuracyChanged(Sensor sensor, int accuracy) {
    // nop
  }
}

Java Source Code List

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