Android Open Source - qcn Notification Helper

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License

The source code is released under:
GNU General Public License
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Java Source Code

package zsoltmester.qcn.quickcircle.notifications;
//  ww  w  . j  a  v a  2 s. c  o  m
import android.service.notification.StatusBarNotification;

import java.util.Collections;
import java.util.Comparator;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;

public class NotificationHelper {

  private static StatusBarNotificationSorter statusBarNotificationSorter;

  /**
   * This method runs only once, when the {@link NotificationActivity} bind to the notification listener service.  
   */
  public static void selectDisplayableNotificationsFromAList(List<StatusBarNotification> statusBarNotifications) {
    Iterator i = statusBarNotifications.iterator();
    while (i.hasNext()) {
      if (!isDisplayable((StatusBarNotification) i.next())) {
        i.remove();
      }
    }
  }

  public static boolean isDisplayable(StatusBarNotification statusBarNotification) {
    return !statusBarNotification.isOngoing();
  }

  public static void sortNotificationsBasedOnRankingMap(List<StatusBarNotification> statusBarNotifications, 
      String[] orderedRankingMapKeys) {
    if (statusBarNotificationSorter == null) {
      statusBarNotificationSorter = new StatusBarNotificationSorter();
    }
    statusBarNotificationSorter.setOrderedRankingMapKeys(orderedRankingMapKeys);
    Collections.sort(statusBarNotifications, statusBarNotificationSorter);
  }

  private static int getRank(StatusBarNotification statusBarNotification, String[] orderedRankingMapKeys) {
    int orderedRankingMapKeysLength =  orderedRankingMapKeys.length;
    for (int index = 0; index < orderedRankingMapKeysLength; ++index) {
      if (orderedRankingMapKeys[index].equals(statusBarNotification.getKey())) {
        return index;
      }
    }
    return orderedRankingMapKeysLength;
  }

  public static void insertNotificationBasedOnRankingMap(List<StatusBarNotification> statusBarNotifications, 
      StatusBarNotification statusBarNotificationToInsert, String[] orderedRankingMapKeys) {
    boolean notificationUpdated = updateNotificationIfItPossible(statusBarNotifications, 
        statusBarNotificationToInsert);
    if (!notificationUpdated) {
      int statusBarNotificationToInsertRank = getRank(statusBarNotificationToInsert, orderedRankingMapKeys);
      statusBarNotifications.add(statusBarNotificationToInsertRank, statusBarNotificationToInsert);
    }
  }

  @SuppressWarnings("unchecked")
  private static boolean updateNotificationIfItPossible(List<StatusBarNotification> statusBarNotifications, 
      StatusBarNotification statusBarNotificationNewVersion) {
    ListIterator listIterator = statusBarNotifications.listIterator();
    while (listIterator.hasNext()) {
      StatusBarNotification currentStatusBarNotification = (StatusBarNotification) listIterator.next();
      if (currentStatusBarNotification.getId() == statusBarNotificationNewVersion.getId()) {
        listIterator.set(statusBarNotificationNewVersion);
        // statusBarNotificationToInsert updated the outdated version of that notification.
        return true;
      }
    }
    return false;
  }

  public static void deleteNotification(List<StatusBarNotification> statusBarNotifications, 
      StatusBarNotification statusBarNotificationToDelete) {
    Iterator statusBarNotificationIterator = statusBarNotifications.iterator();
    while (statusBarNotificationIterator.hasNext()) {
      if (((StatusBarNotification) statusBarNotificationIterator.next()).getId() 
          == statusBarNotificationToDelete.getId()) {
        statusBarNotificationIterator.remove();
        return;
      }
    }
  }

  private static class StatusBarNotificationSorter implements Comparator<StatusBarNotification> {

    private String[] orderedRankingMapKeys;

    private void setOrderedRankingMapKeys(String[] orderedRankingMapKeys) {
      this.orderedRankingMapKeys = orderedRankingMapKeys;
    }

    @Override
    public int compare(StatusBarNotification lhs, StatusBarNotification rhs) {
      return getRank(lhs, orderedRankingMapKeys) - getRank(rhs, orderedRankingMapKeys);
    }
  }
}
Java Source Code List
