How to implement Asynchronous message Mechanism in android

This article introduces the knowledge of "how to implement asynchronous messaging mechanism in android". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Handler 、 Message 、 Loopler 、 MessageQueen

First, let's take a look at one of the most common uses of Handler that we usually use.

Handler handler = new Handler () {@ Override public void handleMessage (Message msg) {super.handleMessage (msg); / / perform some UI operations and other processing} new Thread (new Runnable () {@ Override public void run () {Message message = Message.obtain ();. Handler.sendMessage (message);});}

Take a look at the source code of the constructor of handler

Public Handler () {this (null, false);} / / he will call the following constructor public Handler (Callback callback, boolean async) {if (FIND_POTENTIAL_LEAKS) {final Class in this class