Re: [android-developers] Re: handler.removeMessages(0) removes all runnable added by handler.post().

Yes, that's what I mean. What I didn't know was that
Even though I never set 'what' value to 0 in handler.post(new Runnable()),

The runnable is removed. (The doc didn't say default value of 'what' is 0!!!)

2013/4/12 bob <bob@coolfone.comze.com>

That code does not remove the 0th Message.

It removes all messages that have a "what" value of 0.  

The "what" is apparently an id associated with the messages (not necessarily unique) :

Thanks.

On Thursday, April 11, 2013 8:20:06 PM UTC-5, NoraBora wrote:

Sometimes you use a handler as a member variable and use it for sendMessages(), removeMessage(), post().
I just found out something.

Say you call these
    handler.sendMesssage(0) // 1
    handler.post(new Runnable()) // 2
    handler.post(new Runnable()) // 3

and call this
    handler.removeMessage(0)

then this will remove 2, 3 as well as 1
because removeMessage/hasMessage doesn't check runnable and posted message's what value is 0 by default.

Some people could think this as a bug but it's too late to change such a basic api so
I think documentation should mention this.

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