Android Open Source - RZAndroidBaseUtils R Z Async Task Event

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License

The source code is released under:

MIT License

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Java Source Code

package com.raizlabs.tasks;
/* w  w w. jav  a 2 s .  c o m*/
import java.util.LinkedList;
import java.util.List;

/**
 * Class which represents Events for {@link RZAsyncTask}s.
 * @author Dylan James
 *
 * @param <Result> The Result type of the {@link RZAsyncTask}.
 */
public class RZAsyncTaskEvent<Progress, Result> {
  private List<RZAsyncTaskListener<Progress, Result>> listeners;

  /**
   * Creates a new RZAsyncTaskEvent.
   */
  public RZAsyncTaskEvent() {
    listeners = new LinkedList<RZAsyncTaskListener<Progress, Result>>();
  }

  /**
   * Adds an RZAsyncTaskListener to be notified when AsyncTaskEvents happen.
   * @param listener The listener to be notified.
   */
  public void addListener(RZAsyncTaskListener<Progress, Result> listener) {
    if (listener != null) {
      synchronized (listeners) {
        listeners.add(listener);
      }
    }
  }

  /**
   * Removes an RZEventListener so it will no longer be notified of these
   * events.
   * @param listener The RZAsyncTaskListener to be removed.
   * @return True if the listener was removed, false if it wasn't found.
   */
  public boolean removeListener(RZAsyncTaskListener<Progress, Result> listener) {
    synchronized (listeners) {
      return listeners.remove(listener);
    }
  }

  public void raiseCancelled(Result result) {
    synchronized (listeners) {
      for (RZAsyncTaskListener<Progress, Result> listener : listeners) {
        listener.onCancelled(result);
      }
    }
  }

  /**
   * Raises the PreExecute event on all listeners.
   * @see RZAsyncTask#doPreExecute()
   * @param isInstant true if the task will be fast.
   */
  public void raisePreExecute(boolean isInstant) {
    synchronized (listeners) {
      for (RZAsyncTaskListener<Progress, Result> listener : listeners) {
        listener.onPreExecute(isInstant);
      }
    }
  }

  /**
   * Raises the PostExecute event on all listeners.
   * @param result The result arguments to be passed to the listeners.
   */
  public void raisePostExecute(Result result) {
    synchronized (listeners) {
      for (RZAsyncTaskListener<Progress, Result> listener : listeners) {
        listener.onPostExecute(result);
      }
    }
  }

  /**
   * Publishes progress to all listeners.
   * @param progress The progress to be passed to the listeners.
   */
  public void publishProgress(Progress... progress) {
    synchronized (listeners) {
      for (RZAsyncTaskListener<Progress, Result> listener: listeners) {
        listener.onUpdateProgress(progress);
      }
    }
  }
}

Java Source Code List