android2.2.3里面的handler源码，可用于学习，或用于java、javafx等项目，作为线程消息队列使用。.zip

JHandler === Android 2.2.3 里面handler相关的源码，用于学习handler机制。 可用于java、javafx等项目，作为线程消息队列使用。 ```java public class HandlerTest { public static void main(String... args) { //启动一个主线程处理消息 startMainHandler(); //其他的handler线程 HandlerThread handlerThread = new HandlerThread("MAIN") { @Override protected void onLooperPrepared() { super.onLooperPrepared(); //设置这个线程为handler消息处理的主线程 Log.d("MAIN", "tid=" + Thread.currentThread().getId()); } }; //开始运行主线程 handlerThread.start(); //其他线程 Thread otherThread = new Thread(() -> { Handler mainHandler = new Handler(Looper.getMainLooper()); Handler htHandler = new Handler(handlerThread.getLooper()); while (true) { Log.d("\notherThread", "=====================\n"); Log.d("otherThread", "tid=" + Thread.currentThread().getId()); mainHandler.postDelayed(() -> { //这将会在mainThread里面运行 Log.d("mainHandler", "run:tid=" + Thread.currentThread().getId()); }, 3000); htHandler.postDelayed(() -> { //这将会在handlerThread里面执行 Log.d("htHandler", "run:tid=" + Thread.currentThread().getId()); }, 2000); try { Thread.sleep(5000); } catch (InterruptedException e) { throw new RuntimeException(e); } } }); otherThread.start(); } /** * 启动之后，可以使用Looper.getMainLooper() */ public static void startMainHandler() { //此线程做为handler的主线程 Thread mainThread = new Thread(() -> { Looper.prepareMainLooper(); Log.d("mainThread", "tid=" + Thread.currentThread().getId()); Looper.loop(); }); mainThread.start(); } } ``` ```log > Task :HandlerTest.main() 2023-03-02 10:40:55 MAIN:tid=16 2023-03-02 10:40:55 otherThread:===================== 2023-03-02 10:40:55 mainThread:tid=15 2023-03-02 10:40:55 otherThread:tid=17 2023-03-02 10:40:57 htHandler:run:tid=16 2023-03-02 10:40:58 mainHandler:run:tid=15 2023-03-02 10:41:00 otherThread:===================== 2023-03-02 10:41:00 otherThread:tid=17 2023-03-02 10:41:02 htHandler:run:tid=16 2023-03-02 10:41:03 mainHandler:run:tid=15 ```