如何从处理程序中删除所有回调？ [英] How to remove all callback from a Handler?

问题描述

我有一个来自我的子活动的处理常式，由主要的活动。子类使用此处理程序来 postDelay 一些Runnables，我不能管理它们。现在，在onStop事件中，我需要在完成活动之前删除它们（不知何故，我调用finish（），但它仍然一次又一次调用）。是否还有从处理程序中删除所有回调？

I have a handler from my sub-Activity that was called by the main Activity. This handler is used by sub-classes to postDelay some Runnables, and I can't manage them. Now, in onStop event, I need to remove them before finish the activity (somehow I called finish(), but it still call again and again). Is there anyway to remove all callbacks from a Handler?

谢谢。

推荐答案

在我的经验中，调用这个工作太棒了！

In my experience calling this worked great!

handler.removeCallbacksAndMessages(null);

在removeCallbacksAndMessages的文档中，它表示...

In the docs for removeCallbacksAndMessages it says...

删除任何挂起的回调邮件，并发送其obj为令牌的邮件。 如果token为 null ，所有回调和邮件都将被移除。

Remove any pending posts of callbacks and sent messages whose obj is token. If token is null, all callbacks and messages will be removed.

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