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在android中提供了一种异步回调机制Handler,使用它，我们可以在完成一个很长时间的任务后做出相应的通知 handler基本使用：在主线程中，使用han...

Android Handler处理机制 ( 二 ) ——Handler,Message,Looper,MessageQueue

Android是消息驱动的，实现消息驱动有几个要素：消息的表示：Message 消息队列：MessageQueue 消息循环，用于循环取出消息进行处理：Looper 消息处理，消息循环从消息队列中取出消息后要对消息进行处理：Handler 平时我们最常使用的就是Message与Handler了，如...

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