如何在Android代码中提前取消处理程序? [英] How to cancel a handler before time in Android code?

问题描述

我创建了一个延迟1分钟的计时器来关闭服务(如果尚未完成).看起来像这样:

I create 1 minute delayed timer to shutdown service if it's not completed. Looks like this:

private Handler timeoutHandler = new Handler();

在onCreate()里面

inside onCreate()

timeoutHandler.postDelayed(new Runnable()
        {
            public void run()
            {
                Log.d(LOG_TAG, "timeoutHandler:run");

                DBLog.InsertMessage(getApplicationContext(), "Unable to get fix in 1 minute");
                finalizeService();
            }
        }, 60 * 1000);

如果我在这1分钟之前完成工作-我想取消这个延迟的事情，但不确定如何做.

If I get job accomplished before this 1 minute - I would like to get this delayed thing cancelled but not sure how.

推荐答案

使用匿名Runnable不能真正做到这一点.如何将Runnable保存到命名变量?

You can't really do it with an anonymous Runnable. How about saving the Runnable to a named variable?

Runnable finalizer = new Runnable()
    {
        public void run()
        {
            Log.d(LOG_TAG, "timeoutHandler:run");

            DBLog.InsertMessage(getApplicationContext(), "Unable to get fix in 1 minute");
            finalizeService();
        }
    };
timeoutHandler.postDelayed(finalizer, 60 * 1000);

...

// Cancel the runnable
timeoutHandler.removeCallbacks(finalizer);

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