blocks|key|1040629|text|我认为您所说的是在应用程序中的类之间传递事件/消息。因此，这个问题可能归结为这样一种模式的Java实现。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1040630|实际上没有什么东西已经内置(即没有event系统类)，让类传播事件/消息的最常见方法之一是Listener技术(参见wikipedia，Vogel，IBM)。|offset|length|style|CODE|1040631|还有一些框架，就像这个SO+answer中的框架。|1040632|如果你关心Android中线程/进程之间的异步消息，那么有Handlers，AsyncTasks和(用于进程间)+Parcelables。|1040633|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikipedia.org/wiki/Observer_pattern|1|http://www.vogella.de/articles/DesignPatternObserver/article.html|2|http://www.ibm.com/developerworks/java/library/j-jtp07265/index.html|3|https://stackoverflow.com/questions/3032827/lightweight-publish-subscribe-framework-in-java|4|http://developer.android.com/reference/android/os/Handler.html|5|http://developer.android.com/reference/android/os/AsyncTask.html|6|http://developer.android.com/reference/android/os/Parcel.html^0|0|H|5|1M|9|0|1W|5|1|22|3|2|0|B|9|3|0|T|8|4|12|A|5|1L|B|6|0^^$0|@$1|2|3|4|5|6|7|15|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|16|8|@$D|17|E|18|F|G]]|9|@$D|19|E|1A|1|1B]|$D|1C|E|1D|1|1E]|$D|1F|E|1G|1|1H]]|A|$]]|$1|H|3|I|5|6|7|1I|8|@]|9|@$D|1J|E|1K|1|1L]]|A|$]]|$1|J|3|K|5|6|7|1M|8|@]|9|@$D|1N|E|1O|1|1P]|$D|1Q|E|1R|1|1S]|$D|1T|E|1U|1|1V]]|A|$]]|$1|L|3|-4|5|6|7|1W|8|@]|9|@]|A|$]]]|M|$N|$5|O|P|Q|A|$R|S]]|T|$5|O|P|Q|A|$R|U]]|V|$5|O|P|Q|A|$R|W]]|X|$5|O|P|Q|A|$R|Y]]|Z|$5|O|P|Q|A|$R|10]]|11|$5|O|P|Q|A|$R|12]]|13|$5|O|P|Q|A|$R|14]]]]

I think you are speaking in terms of passing events/messages among classes within your application. So this question probably goes down to Java implementation of such a pattern.

There's nothing actually already baked in (i.e. no <code>event</code> system class), one of the most common way to let a class spread an event/message is the Listener technique (see <a href="http://en.wikipedia.org/wiki/Observer_pattern" rel="nofollow noreferrer">wikipedia</a>, <a href="http://www.vogella.de/articles/DesignPatternObserver/article.html" rel="nofollow noreferrer">Vogel</a>, <a href="http://www.ibm.com/developerworks/java/library/j-jtp07265/index.html" rel="nofollow noreferrer">IBM</a>).

There are frameworks too, as from this <a href="https://stackoverflow.com/questions/3032827/lightweight-publish-subscribe-framework-in-java">SO answer</a>.

If you are concerned about asynch messages between thread/processes in Android, then there are <a href="http://developer.android.com/reference/android/os/Handler.html" rel="nofollow noreferrer">Handlers</a>, <a href="http://developer.android.com/reference/android/os/AsyncTask.html" rel="nofollow noreferrer">AsyncTasks</a> and (for inter-process) <a href="http://developer.android.com/reference/android/os/Parcel.html" rel="nofollow noreferrer">Parcelables</a>.

blocks|key|5232327|text|看看BroadcastReceiver吧。我想这就是你要找的。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|5232328|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.android.com/reference/android/content/BroadcastReceiver.html^0|2|H|2|H|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]]|D|@$9|Q|A|R|1|S]]|E|$]]|$1|F|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

Take a look at <a href="http://developer.android.com/reference/android/content/BroadcastReceiver.html" rel="noreferrer"><code>BroadcastReceiver</code></a>. I think it's what you're looking for.

blocks|key|21098|text|我发现LocalBroadcastManager是最适合in+app+pub-sub风格的。你总是可以使用观察者，但这一次让你的生活变得更容易：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|21099|https://developer.android.com/reference/android/support/v4/content/LocalBroadcastManager.html|offset|length|21100|编辑:现在似乎有几种解决方案。当然值得一提的是：|21101|前面提到的|21102|EventBus+|unordered-list-item|21103|Otto|21104|RxBus|21105|21106|entityMap|0|LINK|mutability|MUTABLE|url|1|https://github.com/greenrobot/EventBus|2|http://square.github.io/otto/|3|https://github.com/AndroidKnife/RxBus^0|0|0|2L|0|0|0|0|0|8|1|0|0|4|2|0|0|5|3|0|0^^$0|@$1|2|3|4|5|6|7|14|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|15|8|@]|9|@$D|16|E|17|1|18]]|A|$]]|$1|F|3|G|5|6|7|19|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|1A|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|1B|8|@]|9|@$D|1C|E|1D|1|1E]]|A|$]]|$1|M|3|N|5|L|7|1F|8|@]|9|@$D|1G|E|1H|1|1I]]|A|$]]|$1|O|3|P|5|L|7|1J|8|@]|9|@$D|1K|E|1L|1|1M]]|A|$]]|$1|Q|3|-4|5|6|7|1N|8|@]|9|@]|A|$]]|$1|R|3|-4|5|6|7|1O|8|@]|9|@]|A|$]]]|S|$T|$5|U|V|W|A|$X|C]]|Y|$5|U|V|W|A|$X|Z]]|10|$5|U|V|W|A|$X|11]]|12|$5|U|V|W|A|$X|13]]]]

I found LocalBroadcastManager the most suitable for in app pub-sub style.
You can always use observers but this one makes life more easy:

<a href="https://developer.android.com/reference/android/support/v4/content/LocalBroadcastManager.html" rel="nofollow noreferrer">https://developer.android.com/reference/android/support/v4/content/LocalBroadcastManager.html</a>

EDIT: 
It seems like there are couple of solutions nowdays. They surely worth mentioning:

<ul>
<li><a href="https://github.com/greenrobot/EventBus" rel="nofollow noreferrer">EventBus</a> as mentioned previously </li>
<li><a href="http://square.github.io/otto/" rel="nofollow noreferrer">Otto</a></li>
<li><a href="https://github.com/AndroidKnife/RxBus" rel="nofollow noreferrer">RxBus</a></li>
</ul>

blocks|key|20914|text|我知道这有点老了，但这是谷歌对"android发布订阅“的最高搜索结果。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|20915|安卓的Local+Broadcast+Manager也是一个选择。与全球广播意图相比，它具有一些优势。|offset|length|20916|尽管如此，它仍然与意图紧密相连。|20917|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.android.com/reference/android/support/v4/content/LocalBroadcastManager.html^0|0|3|N|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@$D|R|E|S|1|T]]|A|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]]]

I know this is a bit old, but it was top google result for "android publish subscribe".

Android's <a href="http://developer.android.com/reference/android/support/v4/content/LocalBroadcastManager.html" rel="nofollow">Local Broadcast Manager</a> is also an option. It has some advantages over globally broadcasting intents.

It is still tightly coupled to intents though.

blocks|key|3619094|text|我知道这很旧，但我一直在使用GreenRobot的EventBus。到目前为止一切都很好。与BroadcastReceivers和LocalBroadcastManagers相比，意图的耦合要松散得多。点击这里查看：http://greenrobot.github.io/EventBus/|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3619095|entityMap|0|LINK|mutability|MUTABLE|url|http://greenrobot.github.io/EventBus/^0|30|11|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

I know this is old, but I have been using EventBus by GreenRobot. It is great so far. Much more loosely coupled to intents than BroadcastReceivers and LocalBroadcastManagers. Check it out here: <a href="http://greenrobot.github.io/EventBus/" rel="nofollow">http://greenrobot.github.io/EventBus/</a>

Is there a publish/subscribe pattern in android? 

What I want to achieve is I have this class that can notify interested party of an event. Then the interested party can do whatever it needs. 

Coming from a .net microsoft world, this sort of thing are build in. 

Do android have something similar, or I have to write some thing like an observer pattern?

android publish/subscribe pattern

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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android中有发布/订阅模式吗？我想要实现的是我有这个类，它可以通知相关方一个事件。然后，感兴趣的一方可以做它需要做的任何事情。来自微软的.net世界，这类东西是内置的。android有没有类似的东西，或者我必须写一些像观察者模式这样的东西？

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