Android Open Source - Aviary-Android-SDK Thread Utils

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Java Source Code

package com.aviary.android.feather.utils;
/*from   www .java 2 s. c o m*/
import android.app.ProgressDialog;
import android.os.Handler;

import com.aviary.android.feather.library.MonitoredActivity;

/**
 * Some thread related utilities.
 * 
 * @author alessandro
 */
public class ThreadUtils {

  /**
   * Start background job.
   * 
   * @param activity
   *            the activity
   * @param title
   *            the title
   * @param message
   *            the message
   * @param job
   *            the job
   * @param handler
   *            the handler
   */
  public static void startBackgroundJob( MonitoredActivity activity, String title, String message, Runnable job, Handler handler ) {
    ProgressDialog dialog = ProgressDialog.show( activity, title, message, true, false );
    new Thread( new BackgroundJob( activity, job, dialog, handler ) ).start();
  }

  /**
   * The Class BackgroundJob.
   */
  private static class BackgroundJob extends MonitoredActivity.LifeCycleAdapter implements Runnable {

    private final MonitoredActivity mActivity;

    private final ProgressDialog mDialog;

    private final Runnable mJob;

    private final Handler mHandler;

    private final Runnable mCleanupRunner = new Runnable() {

      @Override
      public void run() {
        mActivity.removeLifeCycleListener( BackgroundJob.this );
        if ( mDialog.getWindow() != null ) mDialog.dismiss();
      }
    };

    /**
     * Instantiates a new background job.
     * 
     * @param activity
     *            the activity
     * @param job
     *            the job
     * @param dialog
     *            the dialog
     * @param handler
     *            the handler
     */
    public BackgroundJob ( MonitoredActivity activity, Runnable job, ProgressDialog dialog, Handler handler ) {
      mActivity = activity;
      mDialog = dialog;
      mJob = job;
      mActivity.addLifeCycleListener( this );
      mHandler = handler;
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.lang.Runnable#run()
     */
    @Override
    public void run() {
      try {
        mJob.run();
      } finally {
        mHandler.post( mCleanupRunner );
      }
    }

    /*
     * (non-Javadoc)
     * 
     * @see
     * com.aviary.android.feather.MonitoredActivity.LifeCycleAdapter#onActivityDestroyed
     * (com.aviary.android.feather.MonitoredActivity
     * )
     */
    @Override
    public void onActivityDestroyed( MonitoredActivity activity ) {
      mCleanupRunner.run();
      mHandler.removeCallbacks( mCleanupRunner );
    }

    /*
     * (non-Javadoc)
     * 
     * @see
     * com.aviary.android.feather.MonitoredActivity.LifeCycleAdapter#onActivityStopped(
     * com.aviary.android.feather.MonitoredActivity
     * )
     */
    @Override
    public void onActivityStopped( MonitoredActivity activity ) {
      mDialog.hide();
    }

    /*
     * (non-Javadoc)
     * 
     * @see
     * com.aviary.android.feather.MonitoredActivity.LifeCycleAdapter#onActivityStarted(
     * com.aviary.android.feather.MonitoredActivity
     * )
     */
    @Override
    public void onActivityStarted( MonitoredActivity activity ) {
      mDialog.show();
    }
  }

}

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