Android Open Source - iot-starter-for-android Location Utils

• Back to Example/sample  ↑

From Project

Back to project page iot-starter-for-android.

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) 2014 IBM Corp./*from www  . j  a va 2s .  c o  m*/
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Eclipse Distribution License v1.0 which accompany this distribution.
 *
 * The Eclipse Public License is available at
 *   http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 *   http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *    Mike Robertson - initial contribution
 *******************************************************************************/
package com.ibm.demo.IoTStarter.utils;

import android.content.Context;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.util.Log;
import com.ibm.demo.IoTStarter.IoTStarterApplication;
import org.eclipse.paho.client.mqttv3.MqttCallback;

/**
 * LocationUtils enables and disables location services so that the application can publish latitude
 * and longitude data.
 */
public class LocationUtils implements LocationListener {
    private final static String TAG = LocationUtils.class.getName();

    private static LocationUtils instance;
    private IoTStarterApplication app;
    private LocationManager locationManager;
    private Context context;
    private Criteria criteria;

    private LocationUtils(Context context) {
        this.context = context;
        this.locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
        this.criteria = getCriteria();
        this.app = (IoTStarterApplication) context.getApplicationContext();
    }

    public static LocationUtils getInstance(Context context) {
        if (instance == null) {
            instance = new LocationUtils(context);
        }
        return instance;
    }

    /**
     * Enable location services
     */
    public void connect() {
        Log.d(TAG, ".connect() entered");

        // Check if location provider is enabled
        String locationProvider = LocationManager.NETWORK_PROVIDER;
        if (locationManager.isProviderEnabled(locationProvider) == false) {
            Log.d(TAG, "Location provider not enabled.");
            app.setCurrentLocation(null);
            return;
        }

        // register for location updates
        String bestProvider = locationManager.getBestProvider(criteria, false);
        locationManager.requestLocationUpdates(bestProvider, Constants.LOCATION_MIN_TIME, Constants.LOCATION_MIN_DISTANCE, this);
        app.setCurrentLocation(locationManager.getLastKnownLocation(locationProvider));
    }

    /**
     * Disable location services
     */
    public void disconnect() {
        Log.d(TAG, ".disconnect() entered");

        String locationProvider = LocationManager.NETWORK_PROVIDER;
        if (locationManager.isProviderEnabled(locationProvider)) {
            locationManager.removeUpdates(this);
        }
    }

    @Override
    public void onLocationChanged(Location location) {
        Log.d(TAG, ".onLocationChanged() entered");

        //publish location details
        app.setCurrentLocation(location);
    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {
        Log.d(TAG, ".onStatusChanged() entered");

    }

    @Override
    public void onProviderEnabled(String provider) {
        Log.d(TAG, ".onProviderEnabled() entered");

    }

    @Override
    public void onProviderDisabled(String provider) {
        Log.d(TAG, ".onProviderDisabled() entered");

    }

    /**
     * Helper method to create a criteria for location change listener
     *
     * @return criteria constructed for the listener
     */
    public Criteria getCriteria() {
        Criteria criteria = new Criteria();
        criteria.setPowerRequirement(Criteria.POWER_LOW);
        criteria.setAccuracy(Criteria.ACCURACY_FINE);
        criteria.setAltitudeRequired(false);
        criteria.setBearingRequired(false);
        criteria.setCostAllowed(true);
        criteria.setSpeedRequired(false);
        return criteria;
    }
}

Java Source Code List

• Back to Example/sample  ↑