Java tutorial
/* * Copyright 2010-2013 Eric Kok et al. * * Transdroid 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. * * Transdroid 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 Transdroid. If not, see <http://www.gnu.org/licenses/>. */ package org.transdroid.core.service; import java.io.IOException; import java.io.InputStream; import java.util.Calendar; import java.util.Date; import java.util.Random; import org.androidannotations.annotations.Bean; import org.androidannotations.annotations.EService; import org.androidannotations.annotations.SystemService; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.AbstractHttpClient; import org.apache.http.impl.client.DefaultHttpClient; import org.transdroid.core.R; import org.transdroid.core.app.settings.NotificationSettings; import org.transdroid.core.app.settings.SystemSettings; import org.transdroid.core.gui.log.Log; import org.transdroid.core.gui.navigation.NavigationHelper; import org.transdroid.daemon.util.HttpHelper; import android.app.IntentService; import android.app.NotificationManager; import android.app.PendingIntent; import android.content.Intent; import android.content.pm.PackageInfo; import android.content.pm.PackageManager.NameNotFoundException; import android.net.Uri; import android.support.v4.app.NotificationCompat; import android.support.v4.app.NotificationCompat.Builder; @EService public class AppUpdateService extends IntentService { private static final String LATEST_URL_APP = "http://www.transdroid.org/update/latest-app.php"; private static final String LATEST_URL_SEARCH = "http://www.transdroid.org/update/latest-search.php"; private static final String DOWNLOAD_URL_APP = "http://www.transdroid.org/latest"; private static final String DOWNLOAD_URL_SEARCH = "http://www.transdroid.org/latest-search"; @Bean protected NavigationHelper navigationHelper; @Bean protected ConnectivityHelper connectivityHelper; @Bean protected SystemSettings systemSettings; @Bean protected NotificationSettings notificationSettings; @SystemService protected NotificationManager notificationManager; public AppUpdateService() { super("AppUpdateService"); } @Override protected void onHandleIntent(Intent intent) { // Only run this service if app updates are handled via transdroid.org at all if (!navigationHelper.enableUpdateChecker()) return; if (!connectivityHelper.shouldPerformBackgroundActions() || !systemSettings.checkForUpdates()) { Log.d(this, "Skip the app update service, as background data is disabled, the service is explicitly " + "disabled or we are not connected."); return; } Date lastChecked = systemSettings.getLastCheckedForAppUpdates(); Calendar lastDay = Calendar.getInstance(); lastDay.add(Calendar.DAY_OF_MONTH, -1); if (lastChecked != null && lastChecked.after(lastDay.getTime())) { Log.d(this, "Skip the update service, as we already checked the last 24 hours (or to be exact at " + lastChecked.toString() + ")."); return; } DefaultHttpClient httpclient = new DefaultHttpClient(); Random random = new Random(); try { // Retrieve what is the latest released app and search module versions String[] app = retrieveLatestVersion(httpclient, LATEST_URL_APP); String[] search = retrieveLatestVersion(httpclient, LATEST_URL_SEARCH); int appVersion = Integer.parseInt(app[0].trim()); int searchVersion = Integer.parseInt(search[0].trim()); // New version of the app? try { PackageInfo appPackage = getPackageManager().getPackageInfo(getPackageName(), 0); Log.d(this, "Local Transdroid is at " + appPackage.versionCode + " and the reported latest version is " + appVersion); if (appPackage.versionCode < appVersion) { // New version available! Notify the user. newNotification(getString(R.string.update_app_newversion), getString(R.string.update_app_newversion), getString(R.string.update_updateto, app[1].trim()), DOWNLOAD_URL_APP + "?" + Integer.toString(random.nextInt()), 90000); } } catch (NameNotFoundException e) { // Not installed... this can never happen since this Service is part of the app itself } // New version of the search module? try { PackageInfo searchPackage = getPackageManager().getPackageInfo("org.transdroid.search", 0); Log.d(this, "Local Transdroid Seach is at " + searchPackage.versionCode + " and the reported latest version is " + searchVersion); if (searchPackage.versionCode < searchVersion) { // New version available! Notify the user. newNotification(getString(R.string.update_search_newversion), getString(R.string.update_search_newversion), getString(R.string.update_updateto, search[1].trim()), DOWNLOAD_URL_SEARCH + "?" + Integer.toString(random.nextInt()), 90001); } } catch (NameNotFoundException e) { // The search module isn't installed yet at all; ignore and wait for the user to manually // install it (when the first search is initiated) } // Save that we successfully checked for app updates (and notified the user) // This prevents checking again for 1 day systemSettings.setLastCheckedForAppUpdates(new Date()); } catch (Exception e) { // Cannot check right now for some reason; log and ignore Log.d(this, "Cannot retrieve latest app or search module version code from the site: " + e.toString()); } } /** * Retrieves the latest version number of the app or search module by checking an online text file that looks like * '160|1.1.15' for version code 160 and version name 1.1.15. * @param httpclient An already instantiated HTTP client * @param url The URL of the the text file that contains the current latest version code and name * @return A string array with two elements: the version code and the version number * @throws ClientProtocolException Thrown when the provided URL is invalid * @throws IOException Thrown when the last version information could not be retrieved */ private String[] retrieveLatestVersion(AbstractHttpClient httpclient, String url) throws ClientProtocolException, IOException { HttpResponse request = httpclient.execute(new HttpGet(url)); InputStream stream = request.getEntity().getContent(); String appVersion[] = HttpHelper.convertStreamToString(stream).split("\\|"); stream.close(); return appVersion; } private void newNotification(String ticker, String title, String text, String downloadUrl, int notifyID) { PendingIntent pi = PendingIntent.getActivity(this, notifyID, new Intent(Intent.ACTION_VIEW, Uri.parse(downloadUrl)), Intent.FLAG_ACTIVITY_NEW_TASK); Builder builder = new NotificationCompat.Builder(this).setSmallIcon(R.drawable.ic_stat_notification) .setTicker(ticker).setContentTitle(title).setContentText(text) .setLights(notificationSettings.getDesiredLedColour(), 600, 1000) .setSound(notificationSettings.getSound()).setAutoCancel(true).setContentIntent(pi); notificationManager.notify(notifyID, builder.build()); } }