Java tutorial
/* * The CroudTrip! application aims at revolutionizing the car-ride-sharing market with its easy, * user-friendly and highly automated way of organizing shared Trips. Copyright (C) 2015 Nazeeh Ammari, * Philipp Eichhorn, Ricarda Hohn, Vanessa Lange, Alexander Popp, Frederik Simon, Michael Weber * This program is free software: you can redistribute it and/or modify it under the terms of the GNU * Affero General Public License as published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * This program 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 Affero General Public License for more details. * You should have received a copy of the GNU Affero General Public License along with this program. * If not, see http://www.gnu.org/licenses/. */ package org.croudtrip.location; import android.app.Notification; import android.app.NotificationManager; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.location.Location; import android.support.v4.app.NotificationCompat; import org.croudtrip.Constants; import org.croudtrip.R; import org.croudtrip.api.TripsResource; import org.croudtrip.api.directions.RouteLocation; import org.croudtrip.api.trips.TripOffer; import org.croudtrip.api.trips.TripOfferUpdate; import java.util.List; import java.util.concurrent.atomic.AtomicInteger; import javax.inject.Inject; import pl.charmas.android.reactivelocation.ReactiveLocationProvider; import roboguice.receiver.RoboBroadcastReceiver; import rx.Observable; import rx.functions.Action1; import rx.functions.Func1; import timber.log.Timber; /** * Created by Frederik Simon on 17.05.2015. */ public class LocationUploadTimerReceiver extends RoboBroadcastReceiver { private static final int NOTIFICATION_UPLOAD_TIMER = 654; private final float MIN_ACCURACY = 200.0f; private final int MAX_FAILURE_COUNT = 3; @Inject private LocationUpdater locationUpdater; @Inject private TripsResource tripsResource; private static AtomicInteger failureCount = new AtomicInteger(); @Override protected void handleReceive(final Context context, Intent intent) { ReactiveLocationProvider reactiveLocationProvider = new ReactiveLocationProvider(context); reactiveLocationProvider.getLastKnownLocation().subscribe(new Action1<Location>() { @Override public void call(final Location location) { tripsResource.getActiveOffers().subscribe(new Action1<List<TripOffer>>() { @Override public void call(List<TripOffer> tripOffers) { if (tripOffers == null || tripOffers.isEmpty()) { Timber.w("You have currently no trips running. No position upload is necessary"); return; } if (location == null) { // null is not good, but happens on startup, so that's okay. Timber.e("No Update of location was possible, since location was null"); return; } Timber.d("Your location accuracy is " + location.getAccuracy()); if (location.getAccuracy() > MIN_ACCURACY) { Timber.e("Your location is not accurate enough: " + location.getAccuracy()); handleError(context); return; } RouteLocation routeLocation = new RouteLocation(location.getLatitude(), location.getLongitude()); for (final TripOffer offer : tripOffers) { // TODO: There should only be one offer TripOfferUpdate offerUpdate = TripOfferUpdate.createNewStartUpdate(routeLocation); tripsResource.updateOffer(offer.getId(), offerUpdate) .subscribe(new Action1<TripOffer>() { @Override public void call(TripOffer tripOffer) { Timber.d("Updated your location on the server for offer " + tripOffer.getId()); SharedPreferences prefs = context.getSharedPreferences( Constants.SHARED_PREF_FILE_PREFERENCES, Context.MODE_PRIVATE); if (prefs.getBoolean(Constants.SHARED_PREF_KEY_RUNNING_TRIP_OFFER, false)) { handleSuccess(context); } } }, new Action1<Throwable>() { @Override public void call(Throwable throwable) { Timber.e("Was not able to update your location on the server " + offer.getId() + " : " + throwable.getMessage()); SharedPreferences prefs = context.getSharedPreferences( Constants.SHARED_PREF_FILE_PREFERENCES, Context.MODE_PRIVATE); if (prefs.getBoolean(Constants.SHARED_PREF_KEY_RUNNING_TRIP_OFFER, false)) { handleError(context); } } }); } } }, new Action1<Throwable>() { @Override public void call(Throwable throwable) { Timber.e( "Was not able to update your location on the server. Could not download your offers: " + throwable.getMessage()); if (context .getSharedPreferences(Constants.SHARED_PREF_FILE_PREFERENCES, Context.MODE_PRIVATE) .getBoolean(Constants.SHARED_PREF_KEY_RUNNING_TRIP_OFFER, false)) { handleError(context); } } }); } }, new Action1<Throwable>() { @Override public void call(Throwable throwable) { Timber.e("There was an error retrieving the last Location: " + throwable.getMessage()); } }); } private void handleSuccess(Context context) { int fc = failureCount.getAndSet(0); Timber.d("Failure Count is " + fc); if (fc >= MAX_FAILURE_COUNT) { // show a notification that no position upload was possible NotificationManager notificationManager = (NotificationManager) context .getSystemService(Context.NOTIFICATION_SERVICE); Notification notification = new NotificationCompat.Builder(context) .setSmallIcon(R.drawable.ic_directions_car_white) .setContentTitle(context.getString(R.string.success_position_update_title)) .setStyle(new NotificationCompat.BigTextStyle() .bigText(context.getString(R.string.success_position_update_message))) .setContentText(context.getString(R.string.success_position_update_message)).build(); notification.flags |= Notification.FLAG_AUTO_CANCEL; notificationManager.notify(NOTIFICATION_UPLOAD_TIMER, notification); } } private void handleError(Context context) { int fc = failureCount.incrementAndGet(); Timber.d("Failure Count is " + fc); if (fc == MAX_FAILURE_COUNT) { // show a notification that no position upload was possible NotificationManager notificationManager = (NotificationManager) context .getSystemService(Context.NOTIFICATION_SERVICE); Notification notification = new NotificationCompat.Builder(context) .setSmallIcon(R.drawable.ic_directions_car_white) .setContentTitle(context.getString(R.string.error_position_update_title)) .setStyle(new NotificationCompat.BigTextStyle() .bigText(context.getString(R.string.error_position_update_message))) .setContentText(context.getString(R.string.error_position_update_message)).build(); notification.flags |= Notification.FLAG_AUTO_CANCEL; notificationManager.notify(NOTIFICATION_UPLOAD_TIMER, notification); } } }