Java tutorial
/*------------------------------------------------------------------------------ ** Ident: Sogeti Smart Mobile Solutions ** Author: rene ** Copyright: (c) Apr 24, 2011 Sogeti Nederland B.V. All Rights Reserved. **------------------------------------------------------------------------------ ** Sogeti Nederland B.V. | No part of this file may be reproduced ** Distributed Software Engineering | or transmitted in any form or by any ** Lange Dreef 17 | means, electronic or mechanical, for the ** 4131 NJ Vianen | purpose, without the express written ** The Netherlands | permission of the copyright holder. *------------------------------------------------------------------------------ * * This file is part of OpenGPSTracker. * * OpenGPSTracker is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * OpenGPSTracker 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with OpenGPSTracker. If not, see <http://www.gnu.org/licenses/>. * */ package com.mutu.gpstracker.streaming; import java.io.IOException; import java.net.URI; import java.net.URISyntaxException; import java.util.LinkedList; import java.util.Queue; import org.apache.http.HttpResponse; import org.apache.http.StatusLine; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.DefaultHttpClient; import com.mutu.gpstracker.util.Constants; import com.mutu.gpstracker.viewer.ApplicationPreferenceActivity; import com.mutu.gpstracker.R; //import org.apache.ogt.http.HttpResponse; //import org.apache.ogt.http.StatusLine; //import org.apache.ogt.http.client.ClientProtocolException; //import org.apache.ogt.http.client.HttpClient; //import org.apache.ogt.http.client.methods.HttpGet; //import org.apache.ogt.http.impl.client.DefaultHttpClient; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.content.SharedPreferences; import android.location.Location; import android.net.Uri; import android.preference.PreferenceManager; import android.util.Log; public class CustomUpload extends BroadcastReceiver { private static final String CUSTOMUPLOAD_BACKLOG_DEFAULT = "20"; private static CustomUpload sCustomUpload = null; private static final String TAG = "OGT.CustomUpload"; private static final int NOTIFICATION_ID = R.string.customupload_failed; private static Queue<HttpGet> sRequestBacklog = new LinkedList<HttpGet>(); public static synchronized void initStreaming(Context ctx) { if (sCustomUpload != null) { shutdownStreaming(ctx); } sCustomUpload = new CustomUpload(); sRequestBacklog = new LinkedList<HttpGet>(); IntentFilter filter = new IntentFilter(Constants.STREAMBROADCAST); ctx.registerReceiver(sCustomUpload, filter); } public static synchronized void shutdownStreaming(Context ctx) { if (sCustomUpload != null) { ctx.unregisterReceiver(sCustomUpload); sCustomUpload.onShutdown(); sCustomUpload = null; } } private void onShutdown() { } @Override public void onReceive(Context context, Intent intent) { SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context); String prefUrl = preferences.getString(ApplicationPreferenceActivity.CUSTOMUPLOAD_URL, "http://www.example.com"); Integer prefBacklog = Integer.valueOf(preferences .getString(ApplicationPreferenceActivity.CUSTOMUPLOAD_BACKLOG, CUSTOMUPLOAD_BACKLOG_DEFAULT)); Location loc = intent.getParcelableExtra(Constants.EXTRA_LOCATION); Uri trackUri = intent.getParcelableExtra(Constants.EXTRA_TRACK); String buildUrl = prefUrl; buildUrl = buildUrl.replace("@LAT@", Double.toString(loc.getLatitude())); buildUrl = buildUrl.replace("@LON@", Double.toString(loc.getLongitude())); buildUrl = buildUrl.replace("@ID@", trackUri.getLastPathSegment()); buildUrl = buildUrl.replace("@TIME@", Long.toString(loc.getTime())); buildUrl = buildUrl.replace("@SPEED@", Float.toString(loc.getSpeed())); buildUrl = buildUrl.replace("@ACC@", Float.toString(loc.getAccuracy())); buildUrl = buildUrl.replace("@ALT@", Double.toString(loc.getAltitude())); buildUrl = buildUrl.replace("@BEAR@", Float.toString(loc.getBearing())); HttpClient client = new DefaultHttpClient(); URI uploadUri; try { uploadUri = new URI(buildUrl); HttpGet currentRequest = new HttpGet(uploadUri); sRequestBacklog.add(currentRequest); if (sRequestBacklog.size() > prefBacklog) { sRequestBacklog.poll(); } while (!sRequestBacklog.isEmpty()) { HttpGet request = sRequestBacklog.peek(); HttpResponse response = client.execute(request); sRequestBacklog.poll(); StatusLine status = response.getStatusLine(); if (status.getStatusCode() != 200) { throw new IOException("Invalid response from server: " + status.toString()); } clearNotification(context); } } catch (URISyntaxException e) { notifyError(context, e); } catch (ClientProtocolException e) { notifyError(context, e); } catch (IOException e) { notifyError(context, e); } } private void notifyError(Context context, Exception e) { Log.e(TAG, "Custom upload failed", e); String ns = Context.NOTIFICATION_SERVICE; NotificationManager mNotificationManager = (NotificationManager) context.getSystemService(ns); int icon = R.drawable.ic_maps_indicator_current_position; CharSequence tickerText = context.getText(R.string.customupload_failed); long when = System.currentTimeMillis(); Notification notification = new Notification(icon, tickerText, when); Context appContext = context.getApplicationContext(); CharSequence contentTitle = tickerText; CharSequence contentText = e.getMessage(); Intent notificationIntent = new Intent(context, CustomUpload.class); PendingIntent contentIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0); notification.setLatestEventInfo(appContext, contentTitle, contentText, contentIntent); notification.flags = Notification.FLAG_AUTO_CANCEL; mNotificationManager.notify(NOTIFICATION_ID, notification); } private void clearNotification(Context context) { String ns = Context.NOTIFICATION_SERVICE; NotificationManager mNotificationManager = (NotificationManager) context.getSystemService(ns); mNotificationManager.cancel(NOTIFICATION_ID); } }