Android Open Source - Go2-Rennes Abstract Widget Provider

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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  ww . ja  v  a2  s.c o  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;

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.SystemClock;
import android.widget.RemoteViews;
import fr.gotorennes.util.UpdateUtils;

public abstract class AbstractWidgetProvider extends AppWidgetProvider {

  private int updateCount = 0;

  public AbstractWidgetProvider() {
    super();
  }

  @Override
  public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
    for (int i = 0; i < appWidgetIds.length; i++) {
      int appWidgetId = appWidgetIds[i];
      RemoteViews views = updateRemoteViews(context, appWidgetId);
      appWidgetManager.updateAppWidget(appWidgetId, views);
    }

    updateCount++;

    if (updateCount >= (1440 / scheduleInMinutes())) {
      UpdateUtils.checkUpdate(context);
      updateCount = 0;
    }
  }

  protected abstract RemoteViews updateRemoteViews(Context context, int appWidgetId);

  @Override
  public void onDeleted(Context context, int[] appWidgetIds) {
    for (int appWidgetId : appWidgetIds) {
      stopAlarm(context, appWidgetId);
    }
    super.onDeleted(context, appWidgetIds);
  }

  protected void stopAlarm(Context context, int widgetId) {
    Intent widgetUpdate = new Intent();
    widgetUpdate.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
    widgetUpdate.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, widgetId);
    widgetUpdate.setData(Uri.withAppendedPath(Uri.parse(getScheme() + "://widget/id/"), String.valueOf(widgetId)));

    PendingIntent newPending = PendingIntent.getBroadcast(context, 0, widgetUpdate, PendingIntent.FLAG_UPDATE_CURRENT);

    AlarmManager alarms = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
    alarms.cancel(newPending);
  }

  protected void startAlarm(Context context, int widgetId) {
    Intent widgetUpdate = new Intent();
    widgetUpdate.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
    widgetUpdate.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, new int[] { widgetId });
    widgetUpdate.setData(Uri.withAppendedPath(Uri.parse(getScheme() + "://widget/id/"), String.valueOf(widgetId)));

    PendingIntent newPending = PendingIntent.getBroadcast(context, 0, widgetUpdate, PendingIntent.FLAG_UPDATE_CURRENT);

    AlarmManager alarms = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
    alarms.setRepeating(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime(), 60 * 1000 * scheduleInMinutes(), newPending);
  }

  protected void restartAlarm(Context context, int widgetId) {
    stopAlarm(context, widgetId);
    startAlarm(context, widgetId);
  }

  @Override
  public void onReceive(Context context, Intent intent) {

    final String action = intent.getAction();

    if (AppWidgetManager.ACTION_APPWIDGET_UPDATE.equals(action)) {

      if (!getScheme().equals(intent.getScheme()) && intent.getExtras() != null) {

        final int[] appWidgetIds = intent.getExtras().getIntArray(AppWidgetManager.EXTRA_APPWIDGET_IDS);

        for (int appWidgetId : appWidgetIds) {
          restartAlarm(context, appWidgetId);
        }
      }
    }
    super.onReceive(context, intent);
  }

  protected abstract int scheduleInMinutes();

  protected abstract String getScheme();
}

Java Source Code List

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