Android Open Source - Go2-Rennes Update Utils

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License

The source code is released under:

GNU General Public License

Java Source Code

/*******************************************************************************
 * Copyright (c) 2011 Michel DAVID mimah35-at-gmail.com
 * //from   w w  w  .ja va 2s. co  m
 * This program 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.
 * 
 * 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
package fr.gotorennes.util;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.URL;

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager.NameNotFoundException;
import android.net.Uri;
import android.os.AsyncTask;
import android.util.Log;
import fr.gotorennes.R;

/**
 * Utilitaire de contrle de mise  jour.
 * Compare la version disponible sur le market avec celle installe.
 */
public class UpdateUtils {

  private static final String MARKET_URL = "https://play.google.com/store/apps/details?id=";
  private static final String VERSION_PATTERN = ".* itemprop=\"softwareVersion\">([^<]*)<.*";
  
  /**
   * Contrle la mise  jour dans une tche asynchrone
   * @param context Context
   */
  public static void checkUpdate(final Context context) {
    AsyncTask<Void, Void, Boolean> checkTask = new AsyncTask<Void, Void, Boolean>() {

      @Override
      protected Boolean doInBackground(Void... params) {
        return needsUpdate(context);
      }

      @Override
      protected void onPostExecute(Boolean result) {
        if (result) {
          notifyUpdate(context);
        }
      }
    };
    checkTask.execute();
  }
  
  /**
   * Affichage d'une notification de mise  jour
   * @param context Context
   */
  public static void notifyUpdate(Context context) {
    NotificationManager mNotificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
    
    Notification notification = new Notification(R.drawable.icon, "Mise  jour disponible", System.currentTimeMillis());

    Intent notificationIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=" + context.getPackageName()));
    PendingIntent contentIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0);

    notification.setLatestEventInfo(context, "Mise  jour disponible", "Une nouvelle version de " + getApplicationName(context) + " est disponible sur le market.", contentIntent);
    
    mNotificationManager.notify(1, notification);
  }
  
  /**
   * Contrle de la version installe
   * @param context Context
   * @return La version installe doit tre mise  jour
   */
  public static boolean needsUpdate(Context context) {
    String currentVersion = getCurrentVersion(context);
    if (currentVersion != null) {
      String marketVersion = getMarketVersion(context);
      return marketVersion != null && !currentVersion.equals(marketVersion);
    }
    return false;
  }
  
  /**
   * Nom de l'application
   * @param context Context
   * @return Nom de l'application
   */
  public static String getApplicationName(Context context) {
    return context.getString(context.getApplicationInfo().labelRes);
  }
  
  /**
   * Nom de la version installe
   * @param context Context
   * @return Nom de la version installe
   */
  public static String getCurrentVersion(Context context) {
    try {
      return context.getPackageManager().getPackageInfo(context.getPackageName(), 0).versionName;
    }
    catch(NameNotFoundException ex) {
      Log.e("UpdateUtils", ex.getMessage());
    }
    return null;
  }
  
  /**
   * Nom de la version disponible sur le market
   * @param context Context
   * @return Nom de la version disponible sur le market
   */
  public static String getMarketVersion(Context context) {
    return getMarketVersion(context.getPackageName());
  }
  
  /**
   * Nom de la version disponible sur le market
   * @param packageName Nom du package de l'application
   * @return Nom de la version disponible sur le market
   */
  public static String getMarketVersion(String packageName) {
    String version = null;
    BufferedReader reader = null;
    try {
      URL marketURL = new URL(MARKET_URL + packageName);
          reader = new BufferedReader(new InputStreamReader(marketURL.openStream()));
  
          String line = reader.readLine();
          while (line != null) {
              if (line.matches(VERSION_PATTERN)) {
                  version = line.replaceFirst(VERSION_PATTERN, "$1").trim();
                  break;
              }
              line = reader.readLine();
          }
    }
    catch (Exception ex) {
      Log.e("UpdateUtils", ex.getMessage());
    }
    finally {
      closeReader(reader);
    }
    return version;
  }
  
  /**
   * Ferme la connexion du reader
   * @param reader Reader
   */
  private static void closeReader(Reader reader) {
    if (reader != null) {
      try {
        reader.close();
      }
      catch(IOException ex) {
        Log.e("UpdateUtils", ex.getMessage());
      }
    }
  }
  
}

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