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通常使用handler发送信息时，会使用下面两种方式      //方法1 Message msg = new Message(); msg.what = 1; msg.arg1 = 2; msg.arg2 = 3; msg.obj = "demo"; mHandler.sendMessage(msg);

通常我们使用如下方式获取一个Handler对象 private Handler mHandler1 = new Handler(){ public void handleMessage(Message msg) { }; }; private Handler mHandler2 = new Handler(new Handler.Callbac

官方文档这样介绍Handler         Each Handler instance is associated with a single thread and that thread's message queue. When you create a new Handler, it is bound to the thread / message queue of the th