442 lines
15 KiB
Java
442 lines
15 KiB
Java
/**
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* TrackerService.java
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* Implements the app's movement tracker service
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* The TrackerService creates a Track object and displays a notification
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*
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* This file is part of
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* TRACKBOOK - Movement Recorder for Android
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*
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* Copyright (c) 2016-17 - Y20K.org
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* Licensed under the MIT-License
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* http://opensource.org/licenses/MIT
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*
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* Trackbook uses osmdroid - OpenStreetMap-Tools for Android
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* https://github.com/osmdroid/osmdroid
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*/
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package org.y20k.trackbook;
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import android.app.Service;
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import android.content.BroadcastReceiver;
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import android.content.Context;
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import android.content.Intent;
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import android.content.IntentFilter;
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import android.content.SharedPreferences;
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import android.database.ContentObserver;
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import android.hardware.Sensor;
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import android.hardware.SensorEvent;
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import android.hardware.SensorEventListener;
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import android.hardware.SensorManager;
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import android.location.Location;
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import android.location.LocationListener;
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import android.location.LocationManager;
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import android.os.AsyncTask;
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import android.os.Bundle;
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import android.os.CountDownTimer;
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import android.os.Handler;
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import android.os.IBinder;
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import android.preference.PreferenceManager;
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import android.support.annotation.Nullable;
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import android.support.v4.content.LocalBroadcastManager;
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import android.widget.Toast;
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import org.y20k.trackbook.core.Track;
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import org.y20k.trackbook.core.WayPoint;
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import org.y20k.trackbook.helpers.LocationHelper;
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import org.y20k.trackbook.helpers.LogHelper;
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import org.y20k.trackbook.helpers.NotificationHelper;
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import org.y20k.trackbook.helpers.StorageHelper;
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import org.y20k.trackbook.helpers.TrackbookKeys;
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import java.util.List;
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/**
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* TrackerService class
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*/
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public class TrackerService extends Service implements TrackbookKeys, SensorEventListener {
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/* Define log tag */
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private static final String LOG_TAG = TrackerService.class.getSimpleName();
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/* Main class variables */
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private Track mTrack;
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private CountDownTimer mTimer;
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private LocationManager mLocationManager;
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private SensorManager mSensorManager;
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private float mStepCountOffset;
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private LocationListener mGPSListener = null;
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private LocationListener mNetworkListener = null;
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private SettingsContentObserver mSettingsContentObserver;
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private Location mCurrentBestLocation;
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private BroadcastReceiver mTrackRequestReceiver;
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private boolean mTrackerServiceRunning;
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private boolean mLocationSystemSetting;
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@Override
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public int onStartCommand(Intent intent, int flags, int startId) {
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// listen for finished save operation
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mTrackRequestReceiver = new BroadcastReceiver() {
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@Override
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public void onReceive(Context context, Intent intent) {
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sendTrackUpdate();
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}
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};
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IntentFilter trackRequestReceiverIntentFilter = new IntentFilter(ACTION_TRACK_REQUEST);
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LocalBroadcastManager.getInstance(this).registerReceiver(mTrackRequestReceiver, trackRequestReceiverIntentFilter);
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// acquire reference to Location Manager
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mLocationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
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// acquire reference to Sensor Manager
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mSensorManager = (SensorManager) this.getSystemService(Context.SENSOR_SERVICE);
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// get state of location system setting
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mLocationSystemSetting = LocationHelper.checkLocationSystemSetting(getApplicationContext());
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// create content observer for changes in System Settings
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mSettingsContentObserver = new SettingsContentObserver( new Handler());
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// check if user did turn off location in device settings
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if (!mLocationSystemSetting) {
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LogHelper.v(LOG_TAG, "Location Setting is turned off.");
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Toast.makeText(getApplicationContext(), R.string.toast_message_location_offline, Toast.LENGTH_LONG).show();
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stopTracking();
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return START_STICKY;
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}
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// checking for empty intent
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if (intent == null) {
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LogHelper.v(LOG_TAG, "Null-Intent received. Stopping self.");
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stopSelf();
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}
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// ACTION START
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else if (intent.getAction().equals(ACTION_START) && mLocationSystemSetting) {
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startTracking(intent);
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}
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// ACTION STOP
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else if (intent.getAction().equals(ACTION_STOP) || !mLocationSystemSetting) {
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stopTracking();
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// save changed state of Floating Action Button
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SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(this.getApplicationContext());
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SharedPreferences.Editor editor = settings.edit();
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editor.putInt(PREFS_FAB_STATE, FAB_STATE_SAVE);
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editor.apply();
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}
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// START_STICKY is used for services that are explicitly started and stopped as needed
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return START_STICKY;
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}
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@Nullable
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@Override
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public IBinder onBind(Intent intent) {
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return null;
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}
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@Override
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public void onDestroy() {
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LogHelper.v(LOG_TAG, "onDestroy called.");
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// remove receivers and listeners
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stopFindingLocation();
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mSensorManager.unregisterListener(this);
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LocalBroadcastManager.getInstance(this).unregisterReceiver(mTrackRequestReceiver);
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// cancel notification
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stopForeground(true);
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super.onDestroy();
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}
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@Override
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public void onSensorChanged(SensorEvent sensorEvent) {
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// save the step count offset / previously recorded steps
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if (mStepCountOffset == 0) {
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mStepCountOffset = sensorEvent.values[0] - 1;
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}
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// calculate step count
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float stepCount = sensorEvent.values[0] - mStepCountOffset;
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// set step count in track
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mTrack.setStepCount(stepCount);
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}
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@Override
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public void onAccuracyChanged(Sensor sensor, int i) {
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}
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/* Start tracking location */
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private void startTracking(Intent intent) {
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LogHelper.v(LOG_TAG, "Service received command: START");
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// create a new track
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mTrack = new Track();
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// get last location
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if (intent.hasExtra(EXTRA_LAST_LOCATION)) {
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mCurrentBestLocation = intent.getParcelableExtra(EXTRA_LAST_LOCATION);
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}
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// get last location - fallback
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if (mCurrentBestLocation == null) {
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mCurrentBestLocation = LocationHelper.determineLastKnownLocation(mLocationManager);
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}
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// add last location as WayPoint to track
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addWayPointToTrack();
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// set timer to retrieve new locations and to prevent endless tracking
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mTimer = new CountDownTimer(EIGHT_HOURS_IN_MILLISECONDS, FIFTEEN_SECONDS_IN_MILLISECONDS) {
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@Override
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public void onTick(long millisUntilFinished) {
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// update track duration
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long duration = EIGHT_HOURS_IN_MILLISECONDS - millisUntilFinished;
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mTrack.setDuration(duration);
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// try to add WayPoint to Track
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addWayPointToTrack();
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// update notification
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NotificationHelper.update(mTrack, true);
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}
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@Override
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public void onFinish() {
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// remove listeners
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stopFindingLocation();
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}
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};
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mTimer.start();
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// initialize step counter
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mStepCountOffset = 0;
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Sensor stepCounter = mSensorManager.getDefaultSensor(Sensor.TYPE_STEP_COUNTER);
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if (stepCounter != null) {
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mSensorManager.registerListener(this, stepCounter, SensorManager.SENSOR_DELAY_UI);
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} else {
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LogHelper.v(LOG_TAG, "Pedometer Sensor not available");
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mTrack.setStepCount(-1);
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}
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// put up notification
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NotificationHelper.show(this,mTrack);
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// create gps and network location listeners
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startFindingLocation();
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// register content observer for changes in System Settings
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this.getContentResolver().registerContentObserver(android.provider.Settings.Secure.CONTENT_URI, true, mSettingsContentObserver );
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}
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/* Stop tracking location */
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private void stopTracking() {
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LogHelper.v(LOG_TAG, "Service received command: STOP");
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// store current date and time
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mTrack.setRecordingEnd();
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// stop timer
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mTimer.cancel();
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// broadcast an updated track
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sendTrackUpdate();
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// save a temp file in case the activity has been killed
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SaveTempTrackAsyncHelper saveTempTrackAsyncHelper = new SaveTempTrackAsyncHelper();
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saveTempTrackAsyncHelper.execute();
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// change notification
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NotificationHelper.update(mTrack, false);
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// remove listeners
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stopFindingLocation();
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mSensorManager.unregisterListener(this);
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// disable content observer for changes in System Settings
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this.getContentResolver().unregisterContentObserver(mSettingsContentObserver);
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}
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/* Adds a new WayPoint to current track */
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private void addWayPointToTrack() {
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// create new WayPoint
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WayPoint newWayPoint = null;
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// get number of previously tracked WayPoints
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int trackSize = mTrack.getWayPoints().size();
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if (trackSize == 0) {
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// add first location to track
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newWayPoint = mTrack.addWayPoint(mCurrentBestLocation);
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} else {
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// get last WayPoint and compare it to current location
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Location lastWayPoint = mTrack.getWayPointLocation(trackSize - 1);
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// default value for average speed
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float averageSpeed = 0f;
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// compute average speed if new location come from network provider
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if (trackSize > 1 && mCurrentBestLocation.getProvider().equals(LocationManager.NETWORK_PROVIDER)) {
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Location firstWayPoint = mTrack.getWayPointLocation(0);
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float distance = firstWayPoint.distanceTo(lastWayPoint);
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long timeDifference = lastWayPoint.getElapsedRealtimeNanos() - firstWayPoint.getElapsedRealtimeNanos();
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averageSpeed = distance / ((float)timeDifference / ONE_NANOSECOND);
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}
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if (LocationHelper.isNewWayPoint(lastWayPoint, mCurrentBestLocation, averageSpeed)) {
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// if new, add current best location to track
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newWayPoint = mTrack.addWayPoint(mCurrentBestLocation);
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}
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}
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// send local broadcast if new WayPoint added
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if (newWayPoint != null) {
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sendTrackUpdate();
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}
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}
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/* Broadcasts a track update */
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private void sendTrackUpdate() {
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Intent i = new Intent();
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i.setAction(ACTION_TRACK_UPDATED);
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i.putExtra(EXTRA_TRACK, mTrack);
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i.putExtra(EXTRA_LAST_LOCATION, mCurrentBestLocation);
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LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(i);
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}
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/* Creates a location listener */
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private LocationListener createLocationListener() {
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return new LocationListener() {
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public void onLocationChanged(Location location) {
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// check if the new location is better
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if (LocationHelper.isBetterLocation(location, mCurrentBestLocation)) {
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// save location
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mCurrentBestLocation = location;
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}
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}
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public void onStatusChanged(String provider, int status, Bundle extras) {
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LogHelper.v(LOG_TAG, "Location provider status change: " + provider + " | " + status);
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}
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public void onProviderEnabled(String provider) {
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LogHelper.v(LOG_TAG, "Location provider enabled: " + provider);
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}
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public void onProviderDisabled(String provider) {
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LogHelper.v(LOG_TAG, "Location provider disabled: " + provider);
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}
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};
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}
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/* Creates gps and network location listeners */
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private void startFindingLocation() {
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// register location listeners and request updates
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List locationProviders = mLocationManager.getAllProviders();
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if (locationProviders.contains(LocationManager.GPS_PROVIDER)) {
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mGPSListener = createLocationListener();
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mTrackerServiceRunning = true;
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}
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if (locationProviders.contains(LocationManager.NETWORK_PROVIDER)) {
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mNetworkListener = createLocationListener();
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mTrackerServiceRunning = true;
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}
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LocationHelper.registerLocationListeners(mLocationManager, mGPSListener, mNetworkListener);
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}
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/* Removes gps and network location listeners */
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private void stopFindingLocation() {
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// remove listeners
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LocationHelper.removeLocationListeners(mLocationManager, mGPSListener, mNetworkListener);
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mTrackerServiceRunning = false;
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// notify MainActivityMapFragment
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Intent i = new Intent();
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i.setAction(ACTION_TRACKING_STOPPED);
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i.putExtra(EXTRA_TRACK, mTrack);
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i.putExtra(EXTRA_LAST_LOCATION, mCurrentBestLocation);
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LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(i);
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}
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/**
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* Inner class: SettingsContentObserver is a custom ContentObserver for changes in Android Settings
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*/
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public class SettingsContentObserver extends ContentObserver {
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public SettingsContentObserver(Handler handler) {
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super(handler);
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}
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@Override
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public boolean deliverSelfNotifications() {
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return super.deliverSelfNotifications();
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}
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@Override
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public void onChange(boolean selfChange) {
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super.onChange(selfChange);
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LogHelper.v(LOG_TAG, "System Setting change detected.");
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// check if location setting was changed
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boolean previousLocationSystemSetting = mLocationSystemSetting;
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mLocationSystemSetting = LocationHelper.checkLocationSystemSetting(getApplicationContext());
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if (previousLocationSystemSetting != mLocationSystemSetting && !mLocationSystemSetting && mTrackerServiceRunning) {
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LogHelper.v(LOG_TAG, "Location Setting turned off while tracking service running.");
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stopTracking();
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stopForeground(true);
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}
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}
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}
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/**
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* End of inner class
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*/
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/**
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* Inner class: Saves track to external storage using AsyncTask
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*/
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private class SaveTempTrackAsyncHelper extends AsyncTask<Void, Void, Void> {
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@Override
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protected Void doInBackground(Void... voids) {
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LogHelper.v(LOG_TAG, "Saving temporary track object in background.");
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// save track object
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StorageHelper storageHelper = new StorageHelper(TrackerService.this);
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storageHelper.saveTrack(mTrack, FILE_TEMP_TRACK);
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return null;
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}
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@Override
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protected void onPostExecute(Void aVoid) {
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super.onPostExecute(aVoid);
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LogHelper.v(LOG_TAG, "Saving finished.");
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}
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}
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/**
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* End of inner class
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*/
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}
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