{"id":26828,"date":"2024-03-16T07:24:29","date_gmt":"2024-03-16T07:24:29","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/explanation-and-examples-of-using-handlerthread\/"},"modified":"2024-03-22T09:32:20","modified_gmt":"2024-03-22T09:32:20","slug":"explanation-and-examples-of-using-handlerthread","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/explanation-and-examples-of-using-handlerthread\/","title":{"rendered":"Explanation and examples of using HandlerThread"},"content":{"rendered":"<p>HandlerThread is a thread class with a Looper, extending from the Thread class and implementing the Runnable interface. Its main purpose is to make it easier to execute a series of tasks in the background thread, and communicate with the main thread through a Handler.<\/p>\n<p>The principle of HandlerThread is as follows:<\/p>\n<ol>\n<li>Create a Looper object within the HandlerThread and initialize it using the Looper.prepare() method.<\/li>\n<li>Call the Looper.loop() method to start the message loop mechanism of Looper, allowing the HandlerThread to process messages.<\/li>\n<li>Create a Handler object within the HandlerThread, which is bound together with the HandlerThread and can process messages within the HandlerThread.<\/li>\n<\/ol>\n<p>The use of examples is as follows:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">MyHandlerThread<\/span> <span class=\"hljs-keyword\">extends<\/span> <span class=\"hljs-title class_\">HandlerThread<\/span> {\r\n    <span class=\"hljs-keyword\">private<\/span> Handler mHandler;\r\n\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-title function_\">MyHandlerThread<\/span><span class=\"hljs-params\">(String name)<\/span> {\r\n        <span class=\"hljs-built_in\">super<\/span>(name);\r\n    }\r\n\r\n    <span class=\"hljs-meta\">@Override<\/span>\r\n    <span class=\"hljs-keyword\">protected<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">onLooperPrepared<\/span><span class=\"hljs-params\">()<\/span> {\r\n        <span class=\"hljs-built_in\">super<\/span>.onLooperPrepared();\r\n        mHandler = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">Handler<\/span>(getLooper()) {\r\n            <span class=\"hljs-meta\">@Override<\/span>\r\n            <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">handleMessage<\/span><span class=\"hljs-params\">(Message msg)<\/span> {\r\n                <span class=\"hljs-comment\">\/\/ \u5728HandlerThread\u4e2d\u5904\u7406\u6d88\u606f<\/span>\r\n                <span class=\"hljs-comment\">\/\/ ...<\/span>\r\n            }\r\n        };\r\n    }\r\n\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">sendMessage<\/span><span class=\"hljs-params\">(<span class=\"hljs-type\">int<\/span> what)<\/span> {\r\n        <span class=\"hljs-keyword\">if<\/span> (mHandler != <span class=\"hljs-literal\">null<\/span>) {\r\n            mHandler.sendEmptyMessage(what);\r\n        }\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>Utilize MyHandlerThread in the main thread.<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-type\">MyHandlerThread<\/span> <span class=\"hljs-variable\">handlerThread<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">MyHandlerThread<\/span>(<span class=\"hljs-string\">\"MyHandlerThread\"<\/span>);\r\nhandlerThread.start();\r\n\r\n<span class=\"hljs-comment\">\/\/ \u53d1\u9001\u6d88\u606f\u5230HandlerThread\u4e2d\u5904\u7406<\/span>\r\nhandlerThread.sendMessage(<span class=\"hljs-number\">1<\/span>);\r\n<\/code><\/pre>\n<p>In MyHandlerThread, we override the onLooperPrepared() method to initialize a Handler object and bind it with the HandlerThread. This allows us to call sendMessage() externally to send messages to the HandlerThread for processing.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>HandlerThread is a thread class with a Looper, extending from the Thread class and implementing the Runnable interface. Its main purpose is to make it easier to execute a series of tasks in the background thread, and communicate with the main thread through a Handler. The principle of HandlerThread is as follows: Create a Looper [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-26828","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Explanation and examples of using HandlerThread - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/blog\/explanation-and-examples-of-using-handlerthread\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Explanation and examples of using HandlerThread\" \/>\n<meta property=\"og:description\" content=\"HandlerThread is a thread class with a Looper, extending from the Thread class and implementing the Runnable interface. 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