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Update 线程通信基础流程分析.md
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Part1/Android/线程通信基础流程分析.md

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@@ -134,7 +134,7 @@ public Handler(Callback callback, boolean async) {
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1. `Looper.loop()`死循环中的`msg.target`是什么时候被赋值的?
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2. `handler.handleMessage(msg)`在什么时候被回调的?
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###A2`Looper.loop()`死循环中的`msg.target`是什么时候被赋值的?
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###A1`Looper.loop()`死循环中的`msg.target`是什么时候被赋值的?
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要分析这个问题,很自然的我们想到从发送消息开始,无论是`handler.sendMessage(msg)`还是`handler.sendEmptyMessage(what)`,我们最终都可以追溯到以下方法
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```
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public boolean sendMessageAtTime(Message msg, long uptimeMillis) {

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