Android Open Source - screenstandby One Two Dimmer

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License

The source code is released under:

GNU General Public License

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Java Source Code

/*******************************************************************************
 * Copyright (c) 2014 Hoang Nguyen./*w  w w .  j  a va2 s .  c o  m*/
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Public License v2.0
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * 
 * Contributors:
 *     Hoang Nguyen - initial API and implementation
 ******************************************************************************/
package com.nkahoang.screenstandby;

import java.util.Timer;
import java.util.TimerTask;

import android.content.Context;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;

public class OneTwoDimmer {
  public interface DimToggleEventHandler
  {
    public void OnDimToggleEventHandler();
  }
  
  int currentLimit = 0;
  Boolean isRunning = false;
  private ReschedulableTimer timer = null;
  private Runnable task = null;
  private DimToggleEventHandler eventhandler = null;
  private SharedPreferences prefs;
  private Context context;
  public OneTwoDimmer(Context context, DimToggleEventHandler handler)
  {
    eventhandler = handler;
    this.context = context;
  }
  
  public Boolean IsRunning()
  {
    return isRunning;
  }
  public void Start()
  {
    if (isRunning) return;
    if (prefs == null)
      prefs = PreferenceManager.getDefaultSharedPreferences(context);
    currentLimit = (prefs.getInt("onetwotimerh", 0) * 3600) +
             (prefs.getInt("onetwotimerm", 0) * 60) +
              prefs.getInt("onetwotimers", 15);
    Reset();
    timer = new ReschedulableTimer();
    task = new Runnable() {
          @Override
          public void run() {
            if (eventhandler != null) eventhandler.OnDimToggleEventHandler();
            isRunning = false;
          }
      };
      timer.schedule(task, currentLimit * 1000);
      isRunning = true;
  }
  
  public void Reset()
  {
    if (isRunning && (timer != null)) {
      timer.reschedule(currentLimit * 1000);
    }
  }
  
  public void Stop()
  {
    if (isRunning) {
      timer.cancel();
      isRunning = false;
    }
  }
  
  private class ReschedulableTimer extends Timer {
      private Runnable task;
      private TimerTask timerTask;

      public void schedule(Runnable runnable, long delay) {
        task = runnable;
        timerTask = new TimerTask() { public void run() { task.run(); } };
        timer.schedule(timerTask, delay);        
      }

      public void reschedule(long delay) {
        timerTask.cancel();
        timerTask = new TimerTask() { public void run() { task.run(); } };
        timer.schedule(timerTask, delay);        
      }
  }
}

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