Counting Thread : Thread « Development « Android

1. Android
2. Development
3. Thread

Counting Thread

    
//package com.postpc.easyrider.utils;

class CountingThread extends Thread {
  private int _initialCount;
  private int _millisBetweenCount;
  private CountingListener _listener;
  private boolean _stopCounting = false;
  private boolean _hardAbort = false;
  
  /**
   * Initializes a counting thread.
   * 
   * @param listener a counting listener for the thread.
   * @param initialCount the initial counter of the thread.
   * @param millisBetweenCount milliseconds between counter subtraction.
   */
  public CountingThread(CountingListener listener, int initialCount, int millisBetweenCount) {
    _listener = listener;
    _initialCount = initialCount;
    _millisBetweenCount = millisBetweenCount;
  }
  
  @Override
  public void run() {
    int counter = _initialCount;
    
    _listener.onCountBegin(counter);
    
    while (!_stopCounting && counter > 0) {
      try {
        Thread.sleep(_millisBetweenCount);
      } catch (InterruptedException e) {
        // someone wants us out
        _listener.onCountAborted(counter);
        
        return;
      }
      
      counter--;
      _listener.onCount(counter);
    }
    
    if (_stopCounting) {
      if (!_hardAbort) {
        _listener.onCountAborted(counter);  
      }
    } else {
      _listener.onCountComplete();  
    }
  }
  
  /**
   * Aborts the counting thread and calls the onCountAborted listener.
   */
  public void abort() {
    _stopCounting = true;
    
    this.interrupt();
  }
  
  /**
   * Aborts the counting thread and doesn't call onCountAborted().
   */
  public void hardAbort() {
    _hardAbort = true;
    
    abort();
  }
}

 interface CountingListener {
  /**
   * Fires when counting is starting.
   * 
   * @param counter current value of the counter.
   */
  public void onCountBegin(int counter);
  
  /**
   * Fires when counting is being decreased.
   * 
   * @param counter current value of the counter.
   */
  public void onCount(int counter);
  
  /**
   * Fires when the counting is complete.
   */
  public void onCountComplete();

  /**
   * Fires if counting has been aborted.
   * 
   * @param counter the counter value while aborting.
   */
  public void onCountAborted(int counter);
}

   
    
    
    
  

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