Android定时器操作 Timmer

最新推荐文章于 2022-08-09 14:37:09 发布

iteye_12952

最新推荐文章于 2022-08-09 14:37:09 发布

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分类专栏： andriod 文章标签： timmer

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本文介绍了一个基于Java的简单定时任务实现方案，通过使用Timer和TimerTask来定期切换广告图片资源。该方案支持自定义时间间隔，并能根据不同的时间点展示不同的图片资源。

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public class TimerDeal
{

private TimerTask task;

private int ADVERT_INDEX;
private int ADVERT_INTERVAL_TIME = 5000;
private int ADVERT_INDEX_ZERO = 0;
private final int ADVERT_INDEX_ONE = 1;
private final int ADVERT_INDEX_TWO = 2;
private final int ADVERT_INDEX_THREE = 3;
private final int ADVERT_INDEX_FOUR= 4;
private final int ADVERT_INDEX_FIVE = 5;

private Context myContext;

private static final Timer timer = new Timer();

private ToastDeal deal = new ToastDeal();

private Advert advert;

public TimerDeal(Context context)
{
this.ADVERT_INDEX = ADVERT_INDEX_ZERO;
this.myContext = context;
advert = new Advert(myContext);
}

/**
* 定时切换/隐藏固定显示地域的图片或者格式
*
* @param
* @return void
* @throws
* @since TianTian
*/
public void changeImgByTime()
{
this.task = new TimerTask()
{
@Override
public void run()
{
Message message = new Message();
message.what = 1;
handler.sendMessage(message);
}
};

/*
* 时间控制
*/
timer.schedule(task, 1, ADVERT_INTERVAL_TIME);
}

/*
* 定时器动作处理
*/
private Handler handler = new Handler()
{
@Override
public void handleMessage(Message msg)
{

/*
* 要做的事情
*/
ADVERT_INDEX++;
if (ADVERT_INDEX > ADVERT_INDEX_FIVE)
{
ADVERT_INDEX = ADVERT_INDEX_ZERO;
}
else
{
switch (ADVERT_INDEX)
{
case ADVERT_INDEX_ONE:

advert.createView(R.drawable.index_banner2);

break;

case ADVERT_INDEX_TWO:

advert.createView(R.drawable.index_banner);

break;

case ADVERT_INDEX_THREE:

advert.createView(R.drawable.index_banner2);

break;

case ADVERT_INDEX_FOUR:

advert.createView(R.drawable.index_banner);

break;

case ADVERT_INDEX_FIVE:

try
{
Thread.sleep(12000);
}
catch (InterruptedException e)
{
e.printStackTrace();
}

break;

default:

advert.createView(R.drawable.index_banner);

break;
}
}
super.handleMessage(msg);
}
};

/**
* 定时器销毁
*/
public void onDestroy()
{
if (null != timer)
{
timer.cancel();
}
}

}