{"id":15890,"date":"2025-08-14T09:41:36","date_gmt":"2025-08-14T01:41:36","guid":{"rendered":"http:\/\/xinyiworld.top\/wordpress_it\/?p=15890"},"modified":"2025-11-21T15:23:07","modified_gmt":"2025-11-21T07:23:07","slug":"handler-%e7%ba%bf%e7%a8%8b%e5%88%87%e6%8d%a2%e5%8e%9f%e7%90%86%e5%8f%8a%e5%85%b3%e9%94%ae%e6%ba%90%e7%a0%81%e8%a7%a3%e6%9e%90","status":"publish","type":"post","link":"http:\/\/xinyiworld.top\/wordpress_it\/?p=15890","title":{"rendered":"Handler \u7ebf\u7a0b\u5207\u6362\u539f\u7406\u53ca\u5173\u952e\u6e90\u7801\u89e3\u6790"},"content":{"rendered":"<p>Handler \u5b9e\u73b0\u7ebf\u7a0b\u5207\u6362\u7684\u6838\u5fc3\u5728\u4e8e<strong>\u6d88\u606f\u7684\u53d1\u9001\u548c\u5904\u7406\u5206\u79bb<\/strong>\uff1a\u53d1\u9001\u6d88\u606f\u7684\u7ebf\u7a0b\u4e0e\u5904\u7406\u6d88\u606f\u7684\u7ebf\u7a0b\u53ef\u4ee5\u4e0d\u540c\uff0c\u901a\u8fc7\u5171\u4eab\u7684 MessageQueue \u548c Looper \u673a\u5236\u5b9e\u73b0\u8de8\u7ebf\u7a0b\u901a\u4fe1\u3002\u4e0b\u9762\u6211\u5c06\u7ed3\u5408\u5173\u952e\u6e90\u7801\u8be6\u7ec6\u89e3\u6790\u8fd9\u4e00\u539f\u7406\u3002<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_16 counter-hierarchy counter-decimal ez-toc-grey\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">\u76ee\u5f55<\/p>\n<span class=\"ez-toc-title-toggle\"><a class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><i class=\"ez-toc-glyphicon ez-toc-icon-toggle\"><\/i><\/a><\/span><\/div>\n<nav><ul class=\"ez-toc-list ez-toc-list-level-1\"><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-1\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=15890\/#%E4%B8%80%E3%80%81%E6%A0%B8%E5%BF%83%E7%BB%84%E4%BB%B6%E5%85%B3%E7%B3%BB\" title=\"\u4e00\u3001\u6838\u5fc3\u7ec4\u4ef6\u5173\u7cfb\">\u4e00\u3001\u6838\u5fc3\u7ec4\u4ef6\u5173\u7cfb<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-2\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=15890\/#%E4%BA%8C%E3%80%81%E7%BA%BF%E7%A8%8B%E5%88%87%E6%8D%A2%E5%AE%9E%E7%8E%B0%E5%8E%9F%E7%90%86\" title=\"\u4e8c\u3001\u7ebf\u7a0b\u5207\u6362\u5b9e\u73b0\u539f\u7406\">\u4e8c\u3001\u7ebf\u7a0b\u5207\u6362\u5b9e\u73b0\u539f\u7406<\/a><ul class=\"ez-toc-list-level-3\"><li class=\"ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-3\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=15890\/#1_Looper_%E7%9A%84%E7%BA%BF%E7%A8%8B%E7%BB%91%E5%AE%9A%E6%9C%BA%E5%88%B6\" title=\"1. Looper \u7684\u7ebf\u7a0b\u7ed1\u5b9a\u673a\u5236\">1. Looper \u7684\u7ebf\u7a0b\u7ed1\u5b9a\u673a\u5236<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-4\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=15890\/#2_Handler_%E7%9A%84%E5%88%9B%E5%BB%BA%E4%B8%8E%E7%BA%BF%E7%A8%8B%E7%BB%91%E5%AE%9A\" title=\"2. Handler \u7684\u521b\u5efa\u4e0e\u7ebf\u7a0b\u7ed1\u5b9a\">2. Handler \u7684\u521b\u5efa\u4e0e\u7ebf\u7a0b\u7ed1\u5b9a<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-5\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=15890\/#3_%E6%B6%88%E6%81%AF%E5%8F%91%E9%80%81%E8%BF%87%E7%A8%8B%EF%BC%88%E8%B7%A8%E7%BA%BF%E7%A8%8B%EF%BC%89\" title=\"3. \u6d88\u606f\u53d1\u9001\u8fc7\u7a0b\uff08\u8de8\u7ebf\u7a0b\uff09\">3. \u6d88\u606f\u53d1\u9001\u8fc7\u7a0b\uff08\u8de8\u7ebf\u7a0b\uff09<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-6\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=15890\/#4_%E6%B6%88%E6%81%AF%E9%98%9F%E5%88%97%E7%9A%84%E7%BA%BF%E7%A8%8B%E5%AE%89%E5%85%A8\" title=\"4. \u6d88\u606f\u961f\u5217\u7684\u7ebf\u7a0b\u5b89\u5168\">4. \u6d88\u606f\u961f\u5217\u7684\u7ebf\u7a0b\u5b89\u5168<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-7\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=15890\/#5_%E6%B6%88%E6%81%AF%E5%A4%84%E7%90%86%E8%BF%87%E7%A8%8B%EF%BC%88%E7%9B%AE%E6%A0%87%E7%BA%BF%E7%A8%8B%EF%BC%89\" title=\"5. \u6d88\u606f\u5904\u7406\u8fc7\u7a0b\uff08\u76ee\u6807\u7ebf\u7a0b\uff09\">5. \u6d88\u606f\u5904\u7406\u8fc7\u7a0b\uff08\u76ee\u6807\u7ebf\u7a0b\uff09<\/a><\/li><\/ul><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-8\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=15890\/#%E4%B8%89%E3%80%81%E5%BA%95%E5%B1%82%E5%94%A4%E9%86%92%E6%9C%BA%E5%88%B6\" title=\"\u4e09\u3001\u5e95\u5c42\u5524\u9192\u673a\u5236\">\u4e09\u3001\u5e95\u5c42\u5524\u9192\u673a\u5236<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-9\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=15890\/#%E5%9B%9B%E3%80%81%E5%AE%8C%E6%95%B4%E7%BA%BF%E7%A8%8B%E5%88%87%E6%8D%A2%E6%B5%81%E7%A8%8B%E7%A4%BA%E4%BE%8B\" title=\"\u56db\u3001\u5b8c\u6574\u7ebf\u7a0b\u5207\u6362\u6d41\u7a0b\u793a\u4f8b\">\u56db\u3001\u5b8c\u6574\u7ebf\u7a0b\u5207\u6362\u6d41\u7a0b\u793a\u4f8b<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-10\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=15890\/#%E4%BA%94%E3%80%81%E5%85%B3%E9%94%AE%E8%AE%BE%E8%AE%A1%E8%A6%81%E7%82%B9\" title=\"\u4e94\u3001\u5173\u952e\u8bbe\u8ba1\u8981\u70b9\">\u4e94\u3001\u5173\u952e\u8bbe\u8ba1\u8981\u70b9<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-11\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=15890\/#%E5%85%AD%E3%80%81Handler%E8%B7%A8%E7%BA%BF%E7%A8%8B%E7%9A%84%E5%8E%9F%E7%90%86\" title=\"\u516d\u3001Handler\u8de8\u7ebf\u7a0b\u7684\u539f\u7406\">\u516d\u3001Handler\u8de8\u7ebf\u7a0b\u7684\u539f\u7406<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"%E4%B8%80%E3%80%81%E6%A0%B8%E5%BF%83%E7%BB%84%E4%BB%B6%E5%85%B3%E7%B3%BB\"><\/span>\u4e00\u3001\u6838\u5fc3\u7ec4\u4ef6\u5173\u7cfb<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Handler \u673a\u5236\u4e3b\u8981\u7531\u56db\u4e2a\u6838\u5fc3\u7c7b\u7ec4\u6210\uff1a<\/p>\n<ol>\n<li><strong>Handler<\/strong>\uff1a\u6d88\u606f\u53d1\u9001\u8005\u548c\u5904\u7406\u8005<\/li>\n<li><strong>Message<\/strong>\uff1a\u6d88\u606f\u8f7d\u4f53<\/li>\n<li><strong>MessageQueue<\/strong>\uff1a\u6d88\u606f\u961f\u5217\uff0c\u7ebf\u7a0b\u5b89\u5168\u7684\u6570\u636e\u7ed3\u6784<\/li>\n<li><strong>Looper<\/strong>\uff1a\u6d88\u606f\u5faa\u73af\u5668\uff0c\u9a71\u52a8\u6d88\u606f\u5904\u7406<\/li>\n<\/ol>\n<h2><span class=\"ez-toc-section\" id=\"%E4%BA%8C%E3%80%81%E7%BA%BF%E7%A8%8B%E5%88%87%E6%8D%A2%E5%AE%9E%E7%8E%B0%E5%8E%9F%E7%90%86\"><\/span>\u4e8c\u3001\u7ebf\u7a0b\u5207\u6362\u5b9e\u73b0\u539f\u7406<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"1_Looper_%E7%9A%84%E7%BA%BF%E7%A8%8B%E7%BB%91%E5%AE%9A%E6%9C%BA%E5%88%B6\"><\/span>1. Looper \u7684\u7ebf\u7a0b\u7ed1\u5b9a\u673a\u5236<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u6bcf\u4e2a\u7ebf\u7a0b\u8981\u4f7f\u7528 Handler \u5fc5\u987b\u5148\u521b\u5efa Looper\uff0c\u901a\u8fc7 ThreadLocal \u5b9e\u73b0\u7ebf\u7a0b\u9694\u79bb\uff1a<\/p>\n<p>java<\/p>\n<pre><code>\/\/ Looper.java\nprivate static void prepare(boolean quitAllowed) {\n    if (sThreadLocal.get() != null) {\n        throw new RuntimeException(&quot;Only one Looper may be created per thread&quot;);\n    }\n    sThreadLocal.set(new Looper(quitAllowed)); \/\/ \u521b\u5efa\u5e76\u7ed1\u5b9a\u5230\u5f53\u524d\u7ebf\u7a0b\n}<\/code><\/pre>\n<p>\u4e3b\u7ebf\u7a0b\u7684 Looper \u5728 ActivityThread.main() \u4e2d\u521d\u59cb\u5316\uff1a<\/p>\n<p>java<\/p>\n<pre><code>\/\/ ActivityThread.java\npublic static void main(String[] args) {\n    Looper.prepareMainLooper(); \/\/ \u521b\u5efa\u4e3b\u7ebf\u7a0bLooper\n    Looper.loop(); \/\/ \u542f\u52a8\u6d88\u606f\u5faa\u73af\n}<\/code><\/pre>\n<h3><span class=\"ez-toc-section\" id=\"2_Handler_%E7%9A%84%E5%88%9B%E5%BB%BA%E4%B8%8E%E7%BA%BF%E7%A8%8B%E7%BB%91%E5%AE%9A\"><\/span>2. Handler \u7684\u521b\u5efa\u4e0e\u7ebf\u7a0b\u7ed1\u5b9a<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Handler \u6784\u9020\u65f6\u4f1a\u7ed1\u5b9a\u5f53\u524d\u7ebf\u7a0b\u7684 Looper\uff1a<\/p>\n<p>java<\/p>\n<pre><code>\/\/ Handler.java\npublic Handler(@Nullable Callback callback, boolean async) {\n    mLooper = Looper.myLooper(); \/\/ \u83b7\u53d6\u5f53\u524d\u7ebf\u7a0b\u7684Looper\n    if (mLooper == null) {\n        throw new RuntimeException(&quot;Can&#039;t create handler inside thread that has not called Looper.prepare()&quot;);\n    }\n    mQueue = mLooper.mQueue; \/\/ \u83b7\u53d6\u6d88\u606f\u961f\u5217\n}<\/code><\/pre>\n<h3><span class=\"ez-toc-section\" id=\"3_%E6%B6%88%E6%81%AF%E5%8F%91%E9%80%81%E8%BF%87%E7%A8%8B%EF%BC%88%E8%B7%A8%E7%BA%BF%E7%A8%8B%EF%BC%89\"><\/span>3. \u6d88\u606f\u53d1\u9001\u8fc7\u7a0b\uff08\u8de8\u7ebf\u7a0b\uff09<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u5f53\u5b50\u7ebf\u7a0b\u901a\u8fc7 Handler \u53d1\u9001\u6d88\u606f\u65f6\uff1a<\/p>\n<p>java<\/p>\n<pre><code>\/\/ Handler.java\npublic final boolean sendMessage(@NonNull Message msg) {\n    return sendMessageDelayed(msg, 0);\n}\n\npublic final boolean sendMessageDelayed(@NonNull Message msg, long delayMillis) {\n    return sendMessageAtTime(msg, SystemClock.uptimeMillis() + delayMillis);\n}\n\npublic boolean sendMessageAtTime(@NonNull Message msg, long uptimeMillis) {\n    MessageQueue queue = mQueue;\n    return enqueueMessage(queue, msg, uptimeMillis);\n}\n\nprivate boolean enqueueMessage(MessageQueue queue, Message msg, long uptimeMillis) {\n    msg.target = this; \/\/ \u8bbe\u7f6e\u5904\u7406\u8be5\u6d88\u606f\u7684Handler\n    return queue.enqueueMessage(msg, uptimeMillis); \/\/ \u5165\u961f\n}<\/code><\/pre>\n<p>\u5173\u952e\u70b9\uff1a<strong>\u65e0\u8bba\u4ece\u54ea\u4e2a\u7ebf\u7a0b\u8c03\u7528 sendMessage\uff0c\u6700\u7ec8\u90fd\u4f1a\u5c06\u6d88\u606f\u653e\u5165 Handler \u7ed1\u5b9a\u7684 Looper \u7684\u6d88\u606f\u961f\u5217\u4e2d<\/strong>\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4_%E6%B6%88%E6%81%AF%E9%98%9F%E5%88%97%E7%9A%84%E7%BA%BF%E7%A8%8B%E5%AE%89%E5%85%A8\"><\/span>4. \u6d88\u606f\u961f\u5217\u7684\u7ebf\u7a0b\u5b89\u5168<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>MessageQueue \u901a\u8fc7 synchronized \u4fdd\u8bc1\u7ebf\u7a0b\u5b89\u5168\uff1a<\/p>\n<p>java<\/p>\n<pre><code>\/\/ MessageQueue.java\nboolean enqueueMessage(Message msg, long when) {\n    synchronized (this) { \/\/ \u540c\u6b65\u9501\n        \/\/ \u6309\u65f6\u95f4\u987a\u5e8f\u63d2\u5165\u6d88\u606f\u94fe\u8868\n        if (needWake) {\n            nativeWake(mPtr); \/\/ \u5524\u9192\u76ee\u6807\u7ebf\u7a0b\u7684Looper\n        }\n    }\n    return true;\n}<\/code><\/pre>\n<h3><span class=\"ez-toc-section\" id=\"5_%E6%B6%88%E6%81%AF%E5%A4%84%E7%90%86%E8%BF%87%E7%A8%8B%EF%BC%88%E7%9B%AE%E6%A0%87%E7%BA%BF%E7%A8%8B%EF%BC%89\"><\/span>5. \u6d88\u606f\u5904\u7406\u8fc7\u7a0b\uff08\u76ee\u6807\u7ebf\u7a0b\uff09<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Looper \u5728\u76ee\u6807\u7ebf\u7a0b\u4e2d\u5faa\u73af\u5904\u7406\u6d88\u606f\uff1a<\/p>\n<p>java<\/p>\n<pre><code>\/\/ Looper.java\npublic static void loop() {\n    final Looper me = myLooper();\n    final MessageQueue queue = me.mQueue;\n\n    for (;;) {\n        Message msg = queue.next(); \/\/ \u53ef\u80fd\u963b\u585e\n        if (msg == null) {\n            return;\n        }\n        msg.target.dispatchMessage(msg); \/\/ \u5206\u53d1\u5230Handler\u5904\u7406\n        msg.recycleUnchecked();\n    }\n}<\/code><\/pre>\n<p>\u6d88\u606f\u6700\u7ec8\u4f1a\u56de\u5230\u53d1\u9001\u65f6\u6307\u5b9a\u7684 Handler \u5904\u7406\uff1a<\/p>\n<p>java<\/p>\n<pre><code>\/\/ Handler.java\npublic void dispatchMessage(Message msg) {\n    if (msg.callback != null) {\n        handleCallback(msg); \/\/ \u5904\u7406Runnable\n    } else {\n        if (mCallback != null) {\n            if (mCallback.handleMessage(msg)) {\n                return;\n            }\n        }\n        handleMessage(msg); \/\/ \u6700\u7ec8\u5904\u7406\n    }\n}<\/code><\/pre>\n<h2><span class=\"ez-toc-section\" id=\"%E4%B8%89%E3%80%81%E5%BA%95%E5%B1%82%E5%94%A4%E9%86%92%E6%9C%BA%E5%88%B6\"><\/span>\u4e09\u3001\u5e95\u5c42\u5524\u9192\u673a\u5236<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u5f53\u6d88\u606f\u961f\u5217\u4e3a\u7a7a\u65f6\uff0cLooper \u4f1a\u901a\u8fc7 epoll \u673a\u5236\u8fdb\u5165\u4f11\u7720\u72b6\u6001\uff1a<\/p>\n<p>java<\/p>\n<pre><code>\/\/ MessageQueue.java\nMessage next() {\n    for (;;) {\n        nativePollOnce(ptr, nextPollTimeoutMillis); \/\/ Native\u5c42\u963b\u585e\n        \/\/ ...\u5904\u7406\u6d88\u606f\n    }\n}<\/code><\/pre>\n<p>\u5f53\u6709\u65b0\u6d88\u606f\u63d2\u5165\u961f\u5217\u65f6\uff0c\u4f1a\u8c03\u7528 nativeWake \u5524\u9192\uff1a<\/p>\n<p>java<\/p>\n<pre><code>void Looper::wake() {\n    uint64_t inc = 1;\n    write(mWakeEventFd, &amp;inc, sizeof(uint64_t)); \/\/ \u5411eventfd\u5199\u5165\u6570\u636e\n}<\/code><\/pre>\n<h2><span class=\"ez-toc-section\" id=\"%E5%9B%9B%E3%80%81%E5%AE%8C%E6%95%B4%E7%BA%BF%E7%A8%8B%E5%88%87%E6%8D%A2%E6%B5%81%E7%A8%8B%E7%A4%BA%E4%BE%8B\"><\/span>\u56db\u3001\u5b8c\u6574\u7ebf\u7a0b\u5207\u6362\u6d41\u7a0b\u793a\u4f8b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ol>\n<li><strong>\u4e3b\u7ebf\u7a0b<\/strong>\uff1a\u521b\u5efa Handler \u5e76\u7ed1\u5b9a\u4e3b\u7ebf\u7a0b Looper<\/li>\n<li><strong>\u5b50\u7ebf\u7a0b<\/strong>\uff1a\u8c03\u7528 handler.sendMessage(msg)<\/li>\n<li><strong>\u8de8\u7ebf\u7a0b<\/strong>\uff1a\u6d88\u606f\u88ab\u653e\u5165\u4e3b\u7ebf\u7a0b\u7684 MessageQueue<\/li>\n<li><strong>\u4e3b\u7ebf\u7a0b<\/strong>\uff1aLooper.loop() \u4ece\u961f\u5217\u53d6\u51fa\u6d88\u606f\u5e76\u5904\u7406<\/li>\n<\/ol>\n<p>java<\/p>\n<pre><code>\/\/ \u4e3b\u7ebf\u7a0b\nHandler mainHandler = new Handler(Looper.getMainLooper()) {\n    @Override\n    public void handleMessage(Message msg) {\n        \/\/ \u5728\u4e3b\u7ebf\u7a0b\u5904\u7406\u6d88\u606f\n    }\n};\n\n\/\/ \u5b50\u7ebf\u7a0b\nnew Thread(() -&gt; {\n    Message msg = mainHandler.obtainMessage();\n    mainHandler.sendMessage(msg); \/\/ \u53d1\u9001\u5230\u4e3b\u7ebf\u7a0b\n}).start();<\/code><\/pre>\n<h2><span class=\"ez-toc-section\" id=\"%E4%BA%94%E3%80%81%E5%85%B3%E9%94%AE%E8%AE%BE%E8%AE%A1%E8%A6%81%E7%82%B9\"><\/span>\u4e94\u3001\u5173\u952e\u8bbe\u8ba1\u8981\u70b9<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ol>\n<li><strong>\u7ebf\u7a0b\u9694\u79bb<\/strong>\uff1a\u901a\u8fc7 ThreadLocal \u786e\u4fdd\u6bcf\u4e2a\u7ebf\u7a0b\u6709\u72ec\u7acb\u7684 Looper<\/li>\n<li><strong>\u7ebf\u7a0b\u5b89\u5168<\/strong>\uff1aMessageQueue \u4f7f\u7528 synchronized \u4fdd\u8bc1\u5e76\u53d1\u5b89\u5168<\/li>\n<li><strong>\u9ad8\u6548\u5524\u9192<\/strong>\uff1a\u57fa\u4e8e Linux \u7684 epoll \u673a\u5236\u5b9e\u73b0\u7cbe\u51c6\u5524\u9192<\/li>\n<li><strong>\u6d88\u606f\u4f18\u5148\u7ea7<\/strong>\uff1a\u652f\u6301\u540c\u6b65\u5c4f\u969c\u548c\u5f02\u6b65\u6d88\u606f\u4f18\u5148\u5904\u7406<\/li>\n<li><strong>\u5185\u5b58\u7ba1\u7406<\/strong>\uff1aMessage \u5bf9\u8c61\u6c60\u51cf\u5c11\u5185\u5b58\u5206\u914d\u5f00\u9500<\/li>\n<\/ol>\n<p>\u8fd9\u79cd\u8bbe\u8ba1\u4f7f\u5f97 Android \u80fd\u591f\u9ad8\u6548\u5b89\u5168\u5730\u5b9e\u73b0\u8de8\u7ebf\u7a0b\u901a\u4fe1\uff0c\u540c\u65f6\u4fdd\u6301\u8f83\u4f4e\u7684\u529f\u8017<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E5%85%AD%E3%80%81Handler%E8%B7%A8%E7%BA%BF%E7%A8%8B%E7%9A%84%E5%8E%9F%E7%90%86\"><\/span>\u516d\u3001Handler\u8de8\u7ebf\u7a0b\u7684\u539f\u7406<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ol>\n<li><strong>\u6570\u636e\u5171\u4eab<\/strong>\uff1a\u4e0d\u540c\u7ebf\u7a0b\u901a\u8fc7\u5171\u4eab\u540c\u4e00\u4e2a <strong>MessageQueue<\/strong> \u6765\u8fdb\u884c\u901a\u4fe1\u3002\u5b50\u7ebf\u7a0b\u5411\u961f\u5217\u91cc\u201c\u653e\u201d\u4efb\u52a1\uff0c\u4e3b\u7ebf\u7a0b\u4ece\u961f\u5217\u91cc\u201c\u53d6\u201d\u4efb\u52a1\u3002<\/li>\n<li><strong>\u4efb\u52a1\u8c03\u5ea6<\/strong>\uff1a<strong>Looper<\/strong> \u662f\u8fd0\u884c\u5728\u76ee\u6807\u7ebf\u7a0b\uff08\u5982\u4e3b\u7ebf\u7a0b\uff09\u7684\u4e00\u4e2a\u65e0\u9650\u5faa\u73af\uff0c\u5b83\u8d1f\u8d23\u4e0d\u65ad\u5730\u4ece\u961f\u5217\u4e2d\u53d6\u51fa\u4efb\u52a1\uff0c\u5e76\u6d3e\u53d1\u7ed9 <strong>Handler<\/strong> \u6267\u884c\u3002<\/li>\n<li><strong>\u6267\u884c\u4e0a\u4e0b\u6587<\/strong>\uff1a\u4efb\u52a1\u7684\u4ee3\u7801\uff08<code>handleMessage<\/code> \u6216 <code>Runnable.run()<\/code>\uff09\u662f\u5728\u521b\u5efa Handler \u65f6\u6240\u5728\u7684 Looper \u7684\u7ebf\u7a0b\u4e2d\u6267\u884c\u7684\u3002\u7ebf\u7a0b\u5207\u6362\u7684\u79d8\u5bc6\u5c31\u5728\u4e8e\uff1a<strong>\u6d88\u606f\u7684\u201c\u5165\u961f\u201d\u53ef\u4ee5\u5728\u4efb\u4f55\u7ebf\u7a0b\uff0c\u4f46\u6d88\u606f\u7684\u201c\u51fa\u961f\u548c\u5904\u7406\u201d\u6c38\u8fdc\u53ea\u5728 Looper \u6240\u5728\u7684\u7ebf\u7a0b\u3002<\/strong><\/li>\n<\/ol>\n<button class=\"simplefavorite-button\" data-postid=\"15890\" data-siteid=\"1\" data-groupid=\"1\" data-favoritecount=\"0\" style=\"\">\u6536\u85cf <i class=\"sf-icon-star-empty\"><\/i><\/button>","protected":false},"excerpt":{"rendered":"<p>Handler \u5b9e\u73b0\u7ebf\u7a0b\u5207\u6362\u7684\u6838\u5fc3\u5728\u4e8e\u6d88\u606f\u7684\u53d1\u9001\u548c\u5904\u7406\u5206\u79bb\uff1a\u53d1\u9001\u6d88\u606f\u7684\u7ebf\u7a0b\u4e0e\u5904\u7406\u6d88\u606f\u7684\u7ebf\u7a0b\u53ef\u4ee5\u4e0d\u540c\uff0c [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1201],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/15890"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=15890"}],"version-history":[{"count":2,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/15890\/revisions"}],"predecessor-version":[{"id":15952,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/15890\/revisions\/15952"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=15890"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=15890"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=15890"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}