{"id":528,"date":"2025-07-15T14:05:28","date_gmt":"2025-07-15T06:05:28","guid":{"rendered":"https:\/\/trantor.ink\/?p=528"},"modified":"2025-07-15T14:05:29","modified_gmt":"2025-07-15T06:05:29","slug":"android-media3-%e4%b8%ad%e7%9a%84%e5%85%83%e6%95%b0%e6%8d%ae%e4%b9%8b%e6%97%85%ef%bc%9a%e4%bb%8e%e5%ba%94%e7%94%a8%e5%88%b0%e5%a4%96%e9%83%a8%e8%ae%be%e5%a4%87%e7%9a%84%e7%ab%af%e5%88%b0%e7%ab%af","status":"publish","type":"post","link":"https:\/\/trantor.ink\/?p=528","title":{"rendered":"Android Media3 \u4e2d\u7684\u5143\u6570\u636e\u4e4b\u65c5\uff1a\u4ece\u5e94\u7528\u5230\u5916\u90e8\u8bbe\u5907\u7684\u7aef\u5230\u7aef\u6570\u636e\u6d41\u5206\u6790"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_81 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/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=\"https:\/\/trantor.ink\/?p=528\/#%E7%AC%AC_1_%E8%8A%82%EF%BC%9AMedia3_%E7%94%9F%E6%80%81%E7%B3%BB%E7%BB%9F%E5%AF%BC%E8%AE%BA\" >\u7b2c 1 \u8282\uff1aMedia3 \u751f\u6001\u7cfb\u7edf\u5bfc\u8bba<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/trantor.ink\/?p=528\/#11_%E7%8E%B0%E4%BB%A3_Android_%E5%AA%92%E4%BD%93%E6%9E%B6%E6%9E%84\" >1.1 \u73b0\u4ee3 Android \u5a92\u4f53\u67b6\u6784<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/trantor.ink\/?p=528\/#12_MediaMetadata%EF%BC%9A%E9%80%9A%E7%94%A8%E8%AF%AD%E8%A8%80\" >1.2 MediaMetadata\uff1a\u901a\u7528\u8bed\u8a00<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/trantor.ink\/?p=528\/#13_%E9%AB%98%E5%B1%82%E6%95%B0%E6%8D%AE%E6%B5%81%E5%9B%BE\" >1.3 \u9ad8\u5c42\u6570\u636e\u6d41\u56fe<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/trantor.ink\/?p=528\/#%E7%AC%AC_2_%E8%8A%82%EF%BC%9A%E6%9E%84%E5%BB%BA%E5%85%83%E6%95%B0%E6%8D%AE%E8%BD%BD%E4%BD%93%EF%BC%9AMediaItem_%E4%B8%8E_MediaMetadata\" >\u7b2c 2 \u8282\uff1a\u6784\u5efa\u5143\u6570\u636e\u8f7d\u4f53\uff1aMediaItem \u4e0e MediaMetadata<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/trantor.ink\/?p=528\/#21_MediaMetadata_%E7%9A%84%E5%89%96%E6%9E%90\" >2.1 MediaMetadata \u7684\u5256\u6790<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/trantor.ink\/?p=528\/#22_%E4%BB%A3%E7%A0%81%E5%AE%9E%E7%8E%B0%EF%BC%9A%E6%9E%84%E5%BB%BA%E4%B8%80%E4%B8%AA%E5%AF%8C%E5%AA%92%E4%BD%93_MediaItem\" >2.2 \u4ee3\u7801\u5b9e\u73b0\uff1a\u6784\u5efa\u4e00\u4e2a\u5bcc\u5a92\u4f53 MediaItem<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/trantor.ink\/?p=528\/#23_%E9%AB%98%E7%BA%A7%E5%85%83%E6%95%B0%E6%8D%AE%EF%BC%9A%E4%BD%BF%E7%94%A8_extras_%E4%BC%A0%E9%80%92%E8%87%AA%E5%AE%9A%E4%B9%89%E6%95%B0%E6%8D%AE\" >2.3 \u9ad8\u7ea7\u5143\u6570\u636e\uff1a\u4f7f\u7528 extras \u4f20\u9012\u81ea\u5b9a\u4e49\u6570\u636e<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/trantor.ink\/?p=528\/#%E8%A1%A8_21%EF%BC%9AMediaMetadataBuilder_%E5%85%B3%E9%94%AE%E6%96%B9%E6%B3%95%E4%B8%8E%E6%97%A7%E7%89%88_API_%E6%98%A0%E5%B0%84\" >\u8868 2.1\uff1aMediaMetadata.Builder \u5173\u952e\u65b9\u6cd5\u4e0e\u65e7\u7248 API \u6620\u5c04<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/trantor.ink\/?p=528\/#%E7%AC%AC_3_%E8%8A%82%EF%BC%9A%E6%92%AD%E6%94%BE%E5%99%A8%E4%BD%9C%E4%B8%BA%E7%9C%9F%E7%90%86%E4%B9%8B%E6%BA%90\" >\u7b2c 3 \u8282\uff1a\u64ad\u653e\u5668\u4f5c\u4e3a\u771f\u7406\u4e4b\u6e90<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/trantor.ink\/?p=528\/#31_PlayerListener_%E4%BA%8B%E4%BB%B6%E6%80%BB%E7%BA%BF\" >3.1 Player.Listener \u4e8b\u4ef6\u603b\u7ebf<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/trantor.ink\/?p=528\/#32_%E4%BB%A3%E7%A0%81%E5%AE%9E%E7%8E%B0%EF%BC%9A%E4%BB%8E%E6%92%AD%E6%94%BE%E5%99%A8%E4%BA%8B%E4%BB%B6%E6%9B%B4%E6%96%B0_UI\" >3.2 \u4ee3\u7801\u5b9e\u73b0\uff1a\u4ece\u64ad\u653e\u5668\u4e8b\u4ef6\u66f4\u65b0 UI<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/trantor.ink\/?p=528\/#33_%E5%8A%A8%E6%80%81%E5%85%83%E6%95%B0%E6%8D%AE%E6%9B%B4%E6%96%B0\" >3.3 \u52a8\u6001\u5143\u6570\u636e\u66f4\u65b0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/trantor.ink\/?p=528\/#%E8%A1%A8_31%EF%BC%9APlayerListener_%E5%85%83%E6%95%B0%E6%8D%AE%E7%9B%B8%E5%85%B3%E5%9B%9E%E8%B0%83%E5%AF%B9%E6%AF%94\" >\u8868 3.1\uff1aPlayer.Listener \u5143\u6570\u636e\u76f8\u5173\u56de\u8c03\u5bf9\u6bd4<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/trantor.ink\/?p=528\/#%E7%AC%AC_4_%E8%8A%82%EF%BC%9A%E5%90%91%E7%B3%BB%E7%BB%9F%E5%B9%BF%E6%92%AD%EF%BC%9AMediaSession_%E6%A1%A5%E6%A2%81\" >\u7b2c 4 \u8282\uff1a\u5411\u7cfb\u7edf\u5e7f\u64ad\uff1aMediaSession \u6865\u6881<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/trantor.ink\/?p=528\/#41_MediaSession_%E4%BD%9C%E4%B8%BA%E5%85%AC%E5%85%B1_API\" >4.1 MediaSession \u4f5c\u4e3a\u516c\u5171 API<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/trantor.ink\/?p=528\/#42_%E8%87%AA%E5%8A%A8%E7%8A%B6%E6%80%81%E5%90%8C%E6%AD%A5\" >4.2 \u81ea\u52a8\u72b6\u6001\u540c\u6b65<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/trantor.ink\/?p=528\/#43_%E5%9C%A8_MediaSessionService_%E4%B8%AD%E6%89%98%E7%AE%A1\" >4.3 \u5728 MediaSessionService \u4e2d\u6258\u7ba1<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/trantor.ink\/?p=528\/#44_MediaSessionToken%EF%BC%9A%E9%80%9A%E5%BE%80%E7%8E%8B%E5%9B%BD%E7%9A%84%E9%92%A5%E5%8C%99\" >4.4 MediaSession.Token\uff1a\u901a\u5f80\u738b\u56fd\u7684\u94a5\u5319<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/trantor.ink\/?p=528\/#45_%E5%90%91%E5%90%8E%E5%85%BC%E5%AE%B9%E6%80%A7\" >4.5 \u5411\u540e\u517c\u5bb9\u6027<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/trantor.ink\/?p=528\/#%E7%AC%AC_5_%E8%8A%82%EF%BC%9A%E5%AE%A2%E6%88%B7%E7%AB%AF%E6%B6%88%E8%B4%B9%EF%BC%9AMediaController_%E4%B8%8E%E7%B3%BB%E7%BB%9F%E6%9C%8D%E5%8A%A1\" >\u7b2c 5 \u8282\uff1a\u5ba2\u6237\u7aef\u6d88\u8d39\uff1aMediaController \u4e0e\u7cfb\u7edf\u670d\u52a1<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/trantor.ink\/?p=528\/#51_%E7%B3%BB%E7%BB%9F%E7%BA%A7%E5%8F%91%E7%8E%B0%E6%9C%BA%E5%88%B6%EF%BC%9AMediaSessionManager\" >5.1 \u7cfb\u7edf\u7ea7\u53d1\u73b0\u673a\u5236\uff1aMediaSessionManager<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/trantor.ink\/?p=528\/#52_%E5%88%9B%E5%BB%BA_MediaController\" >5.2 \u521b\u5efa MediaController<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/trantor.ink\/?p=528\/#53_MediaController_%E4%BD%9C%E4%B8%BA_Player\" >5.3 MediaController \u4f5c\u4e3a Player<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/trantor.ink\/?p=528\/#54_%E5%9C%A8%E5%AE%A2%E6%88%B7%E7%AB%AF%E7%9B%91%E5%90%AC%E5%85%83%E6%95%B0%E6%8D%AE\" >5.4 \u5728\u5ba2\u6237\u7aef\u76d1\u542c\u5143\u6570\u636e<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/trantor.ink\/?p=528\/#%E7%AC%AC_6_%E8%8A%82%EF%BC%9A%E6%9C%80%E7%BB%88%E7%9B%AE%E7%9A%84%E5%9C%B0%EF%BC%9A%E9%80%9A%E8%BF%87_AVRCP_%E4%BC%A0%E8%BE%93%E5%88%B0%E8%BD%A6%E8%BD%BD%E8%93%9D%E7%89%99\" >\u7b2c 6 \u8282\uff1a\u6700\u7ec8\u76ee\u7684\u5730\uff1a\u901a\u8fc7 AVRCP \u4f20\u8f93\u5230\u8f66\u8f7d\u84dd\u7259<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/trantor.ink\/?p=528\/#61_Android_%E8%93%9D%E7%89%99%E6%A0%88%E6%9E%B6%E6%9E%84%E6%A6%82%E8%A7%88\" >6.1 Android \u84dd\u7259\u6808\u67b6\u6784\u6982\u89c8<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/trantor.ink\/?p=528\/#62_%E8%BF%BD%E8%B8%AA%E6%95%B0%E6%8D%AE%E5%88%B0%E8%93%9D%E7%89%99%E6%9C%8D%E5%8A%A1%E7%9A%84%E8%B7%AF%E5%BE%84\" >6.2 \u8ffd\u8e2a\u6570\u636e\u5230\u84dd\u7259\u670d\u52a1\u7684\u8def\u5f84<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/trantor.ink\/?p=528\/#63_AVRCP_%E5%8D%8F%E8%AE%AE%E7%AE%80%E4%BB%8B\" >6.3 AVRCP \u534f\u8bae\u7b80\u4ecb<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/trantor.ink\/?p=528\/#64_AOSP_%E4%BB%A3%E7%A0%81%E5%88%86%E6%9E%90%EF%BC%9AMediaMetadata_%E4%B8%8E_AVRCP_%E7%9A%84%E6%A1%A5%E6%A2%81\" >6.4 AOSP \u4ee3\u7801\u5206\u6790\uff1aMediaMetadata \u4e0e AVRCP \u7684\u6865\u6881<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/trantor.ink\/?p=528\/#%E8%A1%A8_61%EF%BC%9AMediaMetadata_%E5%88%B0_AVRCP_16_%E5%B1%9E%E6%80%A7%E7%9A%84%E6%98%A0%E5%B0%84\" >\u8868 6.1\uff1aMediaMetadata \u5230 AVRCP 1.6 \u5c5e\u6027\u7684\u6620\u5c04<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/trantor.ink\/?p=528\/#65_%E5%B8%B8%E8%A7%81%E9%99%B7%E9%98%B1%E4%B8%8E%E8%B0%83%E8%AF%95\" >6.5 \u5e38\u89c1\u9677\u9631\u4e0e\u8c03\u8bd5<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/trantor.ink\/?p=528\/#%E7%AC%AC_7_%E8%8A%82%EF%BC%9A%E7%BB%93%E8%AE%BA%E4%B8%8E%E6%9C%80%E4%BD%B3%E5%AE%9E%E8%B7%B5\" >\u7b2c 7 \u8282\uff1a\u7ed3\u8bba\u4e0e\u6700\u4f73\u5b9e\u8df5<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-34\" href=\"https:\/\/trantor.ink\/?p=528\/#71_%E5%85%83%E6%95%B0%E6%8D%AE%E4%B9%8B%E6%97%85%E6%80%BB%E7%BB%93\" >7.1 \u5143\u6570\u636e\u4e4b\u65c5\u603b\u7ed3<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-35\" href=\"https:\/\/trantor.ink\/?p=528\/#72_%E5%BC%80%E5%8F%91%E8%80%85%E8%A1%8C%E5%8A%A8%E5%BB%BA%E8%AE%AE%E6%B8%85%E5%8D%95\" >7.2 \u5f00\u53d1\u8005\u884c\u52a8\u5efa\u8bae\u6e05\u5355<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-36\" href=\"https:\/\/trantor.ink\/?p=528\/#%E5%BC%95%E7%94%A8%E7%9A%84%E8%91%97%E4%BD%9C\" >\u5f15\u7528\u7684\u8457\u4f5c<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E7%AC%AC_1_%E8%8A%82%EF%BC%9AMedia3_%E7%94%9F%E6%80%81%E7%B3%BB%E7%BB%9F%E5%AF%BC%E8%AE%BA\"><\/span><strong>\u7b2c 1 \u8282\uff1aMedia3 \u751f\u6001\u7cfb\u7edf\u5bfc\u8bba<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"11_%E7%8E%B0%E4%BB%A3_Android_%E5%AA%92%E4%BD%93%E6%9E%B6%E6%9E%84\"><\/span><strong>1.1 \u73b0\u4ee3 Android \u5a92\u4f53\u67b6\u6784<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Android Media3 \u662f\u4e00\u4e2a\u65e8\u5728\u7edf\u4e00\u548c\u7b80\u5316\u5a92\u4f53\u5e94\u7528\u5f00\u53d1\u7684\u7efc\u5408\u6027\u5e93\u5957\u4ef6\u3002\u5b83\u6807\u5fd7\u7740 Android \u5e73\u53f0\u5728\u5a92\u4f53\u5904\u7406\u65b9\u9762\u7684\u4e00\u6b21\u91cd\u5927\u6f14\u8fdb\uff0c\u65e8\u5728\u53d6\u4ee3\u4e4b\u524d\u5206\u6563\u7684 API\uff0c\u5982 ExoPlayer\u3001MediaSessionCompat \u548c MediaBrowserServiceCompat\u3002Media3 \u7684\u6838\u5fc3\u7406\u5ff5\u662f\u4e3a\u6240\u6709\u5a92\u4f53\u7528\u4f8b\uff08\u4ece\u7b80\u5355\u7684\u97f3\u89c6\u9891\u64ad\u653e\u5230\u590d\u6742\u7684\u89c6\u9891\u7f16\u8f91\u548c\u8f6c\u7801\uff09\u63d0\u4f9b\u4e00\u4e2a\u7edf\u4e00\u3001\u5065\u58ee\u4e14\u5411\u540e\u517c\u5bb9\u7684 API \u96c6\u5408 <sup>1<\/sup>\u3002\u8fd9\u79cd\u7edf\u4e00\u7684\u67b6\u6784\u6781\u5927\u5730\u964d\u4f4e\u4e86\u5f00\u53d1\u8005\u7684\u590d\u6742\u6027\uff0c\u5e76\u786e\u4fdd\u4e86\u5728\u4e0d\u540c Android \u7248\u672c\u548c\u8bbe\u5907\u95f4\u7684\u4e00\u81f4\u884c\u4e3a\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8be5\u67b6\u6784\u5efa\u7acb\u5728\u51e0\u4e2a\u6838\u5fc3\u7ec4\u4ef6\u4e4b\u4e0a\uff0c\u8fd9\u4e9b\u7ec4\u4ef6\u534f\u540c\u5de5\u4f5c\uff0c\u6784\u6210\u4e86\u4e00\u4e2a\u529f\u80fd\u5f3a\u5927\u4e14\u7075\u6d3b\u7684\u5a92\u4f53\u64ad\u653e\u6846\u67b6\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Player \u63a5\u53e3:<\/strong> \u8fd9\u662f Media3 \u64ad\u653e\u529f\u80fd\u7684\u6838\u5fc3\u3002\u5b83\u5b9a\u4e49\u4e86\u4e00\u4e2a\u6807\u51c6\u5316\u7684\u63a5\u53e3\uff0c\u7528\u4e8e\u63a7\u5236\u5a92\u4f53\u64ad\u653e\uff0c\u5982\u64ad\u653e\u3001\u6682\u505c\u3001\u641c\u5bfb\u7b49\u3002ExoPlayer \u662f Media3 \u4e2d\u6b64\u63a5\u53e3\u7684\u9ed8\u8ba4\u5b9e\u73b0\uff0c\u5b83\u529f\u80fd\u4e30\u5bcc\uff0c\u652f\u6301\u591a\u79cd\u5a92\u4f53\u683c\u5f0f\u3001\u81ea\u9002\u5e94\u6d41\uff08DASH, HLS, SmoothStreaming\uff09\u4ee5\u53ca\u9ad8\u5ea6\u53ef\u5b9a\u5236\u6027 <sup>1<\/sup>\u3002\u6240\u6709\u4e0e\u64ad\u653e\u76f8\u5173\u7684\u64cd\u4f5c\u6700\u7ec8\u90fd\u7531<br>Player \u63a5\u53e3\u7684\u5b9e\u73b0\u6765\u6267\u884c\u3002<\/li>\n\n\n\n<li><strong>MediaSession:<\/strong> MediaSession \u53ef\u4ee5\u88ab\u89c6\u4e3a\u5a92\u4f53\u5e94\u7528\u5411 Android \u7cfb\u7edf\u5f00\u653e\u7684\u201c\u516c\u5171\u524d\u95e8\u201d\u3002\u5b83\u7684\u4e3b\u8981\u804c\u8d23\u662f\u5411\u7cfb\u7edf\u53ca\u5176\u4ed6\u5e94\u7528\u5e7f\u64ad\u64ad\u653e\u5668\u7684\u72b6\u6001\u548c\u5143\u6570\u636e\uff0c\u5e76\u63a5\u6536\u6765\u81ea\u5916\u90e8\u5ba2\u6237\u7aef\u7684\u64ad\u653e\u63a7\u5236\u547d\u4ee4 <sup>1<\/sup>\u3002\u65e0\u8bba\u662f\u9501\u5c4f\u754c\u9762\u3001\u901a\u77e5\u680f\u3001\u84dd\u7259\u8033\u673a\u8fd8\u662f\u8f66\u8f7d\u7cfb\u7edf\uff0c\u5b83\u4eec\u90fd\u662f\u901a\u8fc7\u4e0e\u5e94\u7528\u7684<br>MediaSession \u4ea4\u4e92\u6765\u63a7\u5236\u64ad\u653e\u7684\u3002\u8fd9\u79cd\u8bbe\u8ba1\u6a21\u5f0f\u5c06\u64ad\u653e\u903b\u8f91\u4e0e\u5177\u4f53\u7684\u63a7\u5236\u6765\u6e90\u89e3\u8026\uff0c\u662f\u5b9e\u73b0\u540e\u53f0\u64ad\u653e\u548c\u591a\u5ba2\u6237\u7aef\u96c6\u6210\u7684\u5173\u952e\u3002<\/li>\n\n\n\n<li><strong>MediaController:<\/strong> \u8fd9\u662f\u5ba2\u6237\u7aef\u7ec4\u4ef6\uff0c\u7528\u4e8e\u8fde\u63a5\u5e76\u63a7\u5236\u4e00\u4e2a MediaSession\u3002\u7cfb\u7edf\u670d\u52a1\uff08\u5982\u7cfb\u7edf UI\u3001Android Auto\uff09\u6216\u5176\u4ed6\u7b2c\u4e09\u65b9\u5e94\u7528\u901a\u8fc7\u521b\u5efa MediaController \u5b9e\u4f8b\u6765\u4e0e\u5a92\u4f53\u5e94\u7528\u8fdb\u884c\u901a\u4fe1 <sup>1<\/sup>\u3002\u8fd9\u79cd\u5ba2\u6237\u7aef-\u670d\u52a1\u5668\u6a21\u5f0f\u7684\u5b9e\u73b0\uff08\u901a\u8fc7<br>MediaSessionService \u4f5c\u4e3a\u670d\u52a1\u5668\uff0cMediaController \u4f5c\u4e3a\u5ba2\u6237\u7aef\uff09\u662f Media3 \u67b6\u6784\u7684\u57fa\u77f3\uff0c\u5b83\u5141\u8bb8\u64ad\u653e\u903b\u8f91\u5728\u540e\u53f0\u670d\u52a1\u4e2d\u72ec\u7acb\u8fd0\u884c\uff0c\u800c UI \u6216\u5176\u4ed6\u63a7\u5236\u5668\u53ef\u4ee5\u5728\u9700\u8981\u65f6\u8fde\u63a5\u6216\u65ad\u5f00\uff0c\u800c\u4e0d\u4f1a\u4e2d\u65ad\u64ad\u653e\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"12_MediaMetadata%EF%BC%9A%E9%80%9A%E7%94%A8%E8%AF%AD%E8%A8%80\"><\/span><strong>1.2 MediaMetadata\uff1a\u901a\u7528\u8bed\u8a00<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u6574\u4e2a Media3 \u751f\u6001\u7cfb\u7edf\u4e2d\uff0candroidx.media3.common.MediaMetadata \u7c7b\u626e\u6f14\u7740\u81f3\u5173\u91cd\u8981\u7684\u89d2\u8272\u3002\u5b83\u662f\u4e00\u4e2a\u6807\u51c6\u5316\u7684\u6570\u636e\u7ed3\u6784\uff0c\u76f8\u5f53\u4e8e\u5a92\u4f53\u5185\u5bb9\u7684\u201c\u62a4\u7167\u201d\u6216\u201c\u8eab\u4efd\u8bc1\u201d\u3002\u5b83\u627f\u8f7d\u4e86\u5173\u4e8e\u5a92\u4f53\u9879\u7684\u6240\u6709\u63cf\u8ff0\u6027\u4fe1\u606f\uff0c\u5982\u6807\u9898\u3001\u827a\u672f\u5bb6\u3001\u4e13\u8f91\u3001\u5c01\u9762\u56fe\u7b49\u3002\u5f53\u8fd9\u4e9b\u4fe1\u606f\u88ab\u5c01\u88c5\u5728 MediaMetadata \u5bf9\u8c61\u4e2d\u540e\uff0c\u5b83\u4fbf\u53ef\u4ee5\u5728 Player\u3001MediaSession \u548c MediaController \u4e4b\u95f4\u65e0\u7f1d\u4f20\u9012\uff0c\u6700\u7ec8\u88ab\u5404\u79cd\u7cfb\u7edf\u5ba2\u6237\u7aef\u6d88\u8d39\uff0c\u4ee5\u5728\u4e0d\u540c\u7684\u7528\u6237\u754c\u9762\u4e0a\u5448\u73b0\u4e30\u5bcc\u7684\u5a92\u4f53\u4fe1\u606f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"13_%E9%AB%98%E5%B1%82%E6%95%B0%E6%8D%AE%E6%B5%81%E5%9B%BE\"><\/span><strong>1.3 \u9ad8\u5c42\u6570\u636e\u6d41\u56fe<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u4e86\u66f4\u597d\u5730\u7406\u89e3\u5143\u6570\u636e\u7684\u4f20\u9012\u8def\u5f84\uff0c\u6211\u4eec\u53ef\u4ee5\u52fe\u52d2\u51fa\u5982\u4e0b\u7684\u5b8f\u89c2\u6d41\u7a0b\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u521b\u5efa (Creation):<\/strong> \u5f00\u53d1\u8005\u5728\u5e94\u7528\u5c42\u521b\u5efa MediaItem\uff0c\u5e76\u901a\u8fc7 MediaMetadata.Builder \u4e3a\u5176\u586b\u5145\u8be6\u7ec6\u7684\u5143\u6570\u636e\uff08\u6807\u9898\u3001\u827a\u672f\u5bb6\u7b49\uff09\u3002<\/li>\n\n\n\n<li><strong>\u64ad\u653e (Playback):<\/strong> MediaItem \u88ab\u63d0\u4ea4\u7ed9 Player (ExoPlayer) \u8fdb\u884c\u64ad\u653e\u3002\u6b64\u65f6\uff0cPlayer \u6210\u4e3a\u5f53\u524d\u64ad\u653e\u9879\u5143\u6570\u636e\u7684\u6743\u5a01\u6765\u6e90\u3002<\/li>\n\n\n\n<li><strong>\u53d1\u5e03 (Publication):<\/strong> MediaSession \u4e0e Player \u7ed1\u5b9a\uff0c\u5e76\u81ea\u52a8\u76d1\u542c\u5176\u72b6\u6001\u53d8\u5316\u3002\u5f53 Player \u7684\u5143\u6570\u636e\u66f4\u65b0\u65f6\uff0cMediaSession \u4f1a\u76f8\u5e94\u5730\u66f4\u65b0\u81ea\u8eab\u72b6\u6001\uff0c\u5e76\u51c6\u5907\u597d\u5411\u5916\u754c\u53d1\u5e03\u3002<\/li>\n\n\n\n<li><strong>\u53d1\u73b0 (Discovery):<\/strong> Android \u7cfb\u7edf\u7684 MediaSessionManager \u670d\u52a1\u4f1a\u8ddf\u8e2a\u6240\u6709\u6d3b\u8dc3\u7684 MediaSession\u3002\u7cfb\u7edf\u5ba2\u6237\u7aef\uff08\u5982\u84dd\u7259\u670d\u52a1\u3001\u7cfb\u7edf UI\uff09\u901a\u8fc7\u67e5\u8be2 MediaSessionManager \u6765\u53d1\u73b0\u5f53\u524d\u6b63\u5728\u64ad\u653e\u5a92\u4f53\u7684\u5e94\u7528\u3002<\/li>\n\n\n\n<li><strong>\u6d88\u8d39\u4e0e\u4f20\u8f93 (Consumption &amp; Transmission):<\/strong> \u5ba2\u6237\u7aef\uff08\u5982\u8f66\u8f7d\u84dd\u7259\u7cfb\u7edf\u5bf9\u5e94\u7684 Android \u670d\u52a1\uff09\u83b7\u53d6\u5230 MediaSession \u7684\u4ee4\u724c (SessionToken)\uff0c\u521b\u5efa MediaController \u8fdb\u884c\u8fde\u63a5\uff0c\u5e76\u63a5\u6536\u5143\u6570\u636e\u66f4\u65b0\u3002\u968f\u540e\uff0c\u84dd\u7259\u670d\u52a1\u5c06\u8fd9\u4e9b\u5143\u6570\u636e\u901a\u8fc7 AVRCP \u534f\u8bae\uff08\u97f3\/\u89c6\u9891\u8fdc\u7a0b\u63a7\u5236\u534f\u8bae\uff09\u4f20\u8f93\u7ed9\u914d\u5bf9\u7684\u8bbe\u5907\uff0c\u5982\u8f66\u8f7d\u97f3\u54cd\u3002<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e2a\u6d41\u7a0b\u4f53\u73b0\u4e86 Media3 \u7684\u4e00\u4e2a\u6838\u5fc3\u8bbe\u8ba1\u539f\u5219\uff1a<strong>\u4ece\u547d\u4ee4\u5f0f\u5230\u54cd\u5e94\u5f0f\u7684\u8f6c\u53d8<\/strong>\u3002\u5f00\u53d1\u8005\u4e0d\u518d\u9700\u8981\u50cf\u4f7f\u7528\u65e7\u7684 MediaSessionConnector \u90a3\u6837\u624b\u52a8\u7f16\u5199\u5927\u91cf\u4ee3\u7801\u6765\u540c\u6b65\u64ad\u653e\u5668\u548c\u4f1a\u8bdd\u7684\u72b6\u6001\u3002\u5728 Media3 \u4e2d\uff0c\u5f00\u53d1\u8005\u53ea\u9700\u5728\u6e90\u5934\u63d0\u4f9b\u51c6\u786e\u7684\u6570\u636e\uff08MediaItem \u548c MediaMetadata\uff09\uff0c\u6846\u67b6\u4fbf\u4f1a\u81ea\u52a8\u5904\u7406\u540e\u7eed\u7684\u72b6\u6001\u4f20\u64ad <sup>3<\/sup>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">MediaSession \u5185\u90e8\u5b9e\u73b0\u4e86\u4e00\u4e2a Player.Listener\uff0c\u5f53\u64ad\u653e\u5668\u72b6\u6001\uff08\u5305\u62ec\u5143\u6570\u636e\uff09\u53d1\u751f\u53d8\u5316\u65f6\uff0c\u5b83\u4f1a\u6355\u83b7\u8fd9\u4e9b\u4e8b\u4ef6\uff0c\u66f4\u65b0\u81ea\u8eab\uff0c\u5e76\u901a\u77e5\u6240\u6709\u8fde\u63a5\u7684 MediaController\u3002\u8fd9\u79cd\u54cd\u5e94\u5f0f\u6a21\u578b\u6781\u5927\u5730\u7b80\u5316\u4e86\u4ee3\u7801\uff0c\u5e76\u63d0\u9ad8\u4e86\u7cfb\u7edf\u7684\u5065\u58ee\u6027\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E7%AC%AC_2_%E8%8A%82%EF%BC%9A%E6%9E%84%E5%BB%BA%E5%85%83%E6%95%B0%E6%8D%AE%E8%BD%BD%E4%BD%93%EF%BC%9AMediaItem_%E4%B8%8E_MediaMetadata\"><\/span><strong>\u7b2c 2 \u8282\uff1a\u6784\u5efa\u5143\u6570\u636e\u8f7d\u4f53\uff1aMediaItem \u4e0e MediaMetadata<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5143\u6570\u636e\u65c5\u7a0b\u7684\u8d77\u70b9\u662f\u5728\u5e94\u7528\u7a0b\u5e8f\u4e2d\u7cbe\u786e\u5730\u6784\u5efa\u5176\u8f7d\u4f53\u3002\u5728 Media3 \u4e2d\uff0c\u8fd9\u4e2a\u8f7d\u4f53\u662f androidx.media3.common.MediaItem\uff0c\u800c\u5176\u6838\u5fc3\u5185\u5bb9\u5219\u7531 androidx.media3.common.MediaMetadata \u5b9a\u4e49\u3002\u6b63\u786e\u5730\u6784\u5efa\u8fd9\u4e9b\u5bf9\u8c61\u662f\u786e\u4fdd\u4fe1\u606f\u80fd\u591f\u88ab\u4e0b\u6e38\u6240\u6709\u7ec4\u4ef6\u6b63\u786e\u89e3\u6790\u548c\u663e\u793a\u7684\u524d\u63d0\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"21_MediaMetadata_%E7%9A%84%E5%89%96%E6%9E%90\"><\/span><strong>2.1 MediaMetadata \u7684\u5256\u6790<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">MediaMetadata.Builder \u662f\u521b\u5efa MediaMetadata \u5b9e\u4f8b\u7684\u5de5\u5177\u3002\u5b83\u63d0\u4f9b\u4e86\u4e00\u7cfb\u5217\u94fe\u5f0f\u8c03\u7528\u65b9\u6cd5\uff0c\u7528\u4e8e\u8bbe\u7f6e\u5a92\u4f53\u7684\u5404\u79cd\u5c5e\u6027\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u57fa\u7840\u5b57\u6bb5:<\/strong><\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>setTitle(CharSequence): \u8bbe\u7f6e\u5a92\u4f53\u7684\u4e3b\u6807\u9898\uff0c\u901a\u5e38\u662f\u6b4c\u66f2\u540d\u3002<\/li>\n\n\n\n<li>setArtist(CharSequence): \u8bbe\u7f6e\u4e3b\u8981\u8868\u6f14\u8005\u7684\u540d\u5b57\u3002<\/li>\n\n\n\n<li>setAlbumTitle(CharSequence): \u8bbe\u7f6e\u6240\u5c5e\u4e13\u8f91\u7684\u6807\u9898\u3002<\/li>\n\n\n\n<li>setArtworkUri(Uri): \u8bbe\u7f6e\u5c01\u9762\u56fe\u7247\u7684 URI\u3002\u8fd9\u662f\u63a8\u8350\u7684\u65b9\u5f0f\uff0c\u56e0\u4e3a\u5b83\u907f\u514d\u4e86\u901a\u8fc7 Bundle \u4f20\u9012\u5927\u578b\u4f4d\u56fe\u6570\u636e\uff0c\u4ece\u800c\u964d\u4f4e\u4e86 TransactionTooLargeException \u7684\u98ce\u9669 <sup>7<\/sup>\u3002<\/li>\n\n\n\n<li><strong>\u663e\u793a\u4e13\u7528\u5b57\u6bb5:<\/strong><\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>setDisplayTitle(CharSequence): \u8bbe\u7f6e\u4e00\u4e2a\u9002\u5408\u5728 UI \u4e0a\u76f4\u63a5\u663e\u793a\u7684\u6807\u9898\u3002<\/li>\n\n\n\n<li>setSubtitle(CharSequence): \u8bbe\u7f6e\u526f\u6807\u9898\uff0c\u7528\u4e8e\u63d0\u4f9b\u989d\u5916\u4fe1\u606f\u3002<\/li>\n\n\n\n<li>setDescription(CharSequence): \u8bbe\u7f6e\u5a92\u4f53\u5185\u5bb9\u7684\u8be6\u7ec6\u63cf\u8ff0 <sup>7<\/sup>\u3002<\/li>\n\n\n\n<li><strong>\u7ed3\u6784\u6027\u5b57\u6bb5:<\/strong><\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>setIsBrowsable(boolean): \u6307\u793a\u8be5\u5a92\u4f53\u9879\u662f\u5426\u4e3a\u4e00\u4e2a\u53ef\u6d4f\u89c8\u7684\u201c\u5bb9\u5668\u201d\uff08\u5982\u4e13\u8f91\u3001\u64ad\u653e\u5217\u8868\u6587\u4ef6\u5939\uff09\u3002<\/li>\n\n\n\n<li>setIsPlayable(boolean): \u6307\u793a\u8be5\u5a92\u4f53\u9879\u662f\u5426\u53ef\u4ee5\u76f4\u63a5\u64ad\u653e\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e24\u4e2a\u5e03\u5c14\u6807\u5fd7\u81f3\u5173\u91cd\u8981\uff0c\u56e0\u4e3a\u5b83\u4eec\u4e0d\u4ec5\u4ec5\u662f\u4fe1\u606f\uff0c\u66f4\u662f\u5bf9\u5ba2\u6237\u7aef\u884c\u4e3a\u7684\u6307\u4ee4\u3002\u4f8b\u5982\uff0c\u5bf9\u4e8e\u4e00\u4e2a\u4e13\u8f91\uff0c\u5e94\u8bbe\u7f6e\u4e3a isBrowsable=true \u548c isPlayable=false\u3002\u8fd9\u4f1a\u544a\u8bc9 Android Auto \u6216\u5176\u4ed6\u5a92\u4f53\u6d4f\u89c8\u5668\u5c06\u5176\u663e\u793a\u4e3a\u4e00\u4e2a\u53ef\u70b9\u51fb\u8fdb\u5165\u7684\u5217\u8868\u9879\uff0c\u800c\u4e0d\u662f\u4e00\u4e2a\u53ef\u64ad\u653e\u7684\u66f2\u76ee <sup>10<\/sup>\u3002\u8fd9\u79cd\u5143\u6570\u636e\u9a71\u52a8\u884c\u4e3a\u7684\u6a21\u5f0f\uff0c\u662f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">MediaLibraryService API \u534f\u8bae\u7684\u6838\u5fc3\u90e8\u5206\uff0c\u8981\u6c42\u5e94\u7528\u7684\u5a92\u4f53\u5185\u5bb9\u5e93\u5fc5\u987b\u80fd\u591f\u4ee5\u6811\u72b6\u7ed3\u6784\u8fdb\u884c\u63cf\u8ff0\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"22_%E4%BB%A3%E7%A0%81%E5%AE%9E%E7%8E%B0%EF%BC%9A%E6%9E%84%E5%BB%BA%E4%B8%80%E4%B8%AA%E5%AF%8C%E5%AA%92%E4%BD%93_MediaItem\"><\/span><strong>2.2 \u4ee3\u7801\u5b9e\u73b0\uff1a\u6784\u5efa\u4e00\u4e2a\u5bcc\u5a92\u4f53 MediaItem<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0b\u662f\u4e00\u4e2a\u5b8c\u6574\u7684 Kotlin \u4ee3\u7801\u793a\u4f8b\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u4e3a\u4e00\u4e2a\u97f3\u9891\u6587\u4ef6\u521b\u5efa\u5305\u542b\u4e30\u5bcc\u5143\u6570\u636e\u7684 MediaItem\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5bfc\u5165\u5fc5\u8981\u7684\u7c7b\nimport androidx.media3.common.MediaItem\nimport androidx.media3.common.MediaMetadata\nimport android.net.Uri\n\n\/\/ \u5047\u8bbe\u6211\u4eec\u6709\u4ee5\u4e0b\u4fe1\u606f\nval mediaId = \"unique_song_id_123\"\nval songTitle = \"Bohemian Rhapsody\"\nval artistName = \"Queen\"\nval albumName = \"A Night at the Opera\"\nval audioUri = Uri.parse(\"https:\/\/storage.googleapis.com\/your-bucket\/bohemian_rhapsody.mp3\")\nval artworkUri = Uri.parse(\"https:\/\/storage.googleapis.com\/your-bucket\/a_night_at_the_opera_album_art.jpg\")\n\n\/\/ 1. \u4f7f\u7528 MediaMetadata.Builder \u521b\u5efa\u5143\u6570\u636e\u5bf9\u8c61\nval mediaMetadata = MediaMetadata.Builder()\n\u00a0 .setTitle(songTitle)\n\u00a0 .setArtist(artistName)\n\u00a0 .setAlbumTitle(albumName)\n\u00a0 .setArtworkUri(artworkUri)\n\u00a0 .setIsPlayable(true)\u00a0 \/\/ \u8fd9\u662f\u4e00\u4e2a\u53ef\u64ad\u653e\u7684\u66f2\u76ee\n\u00a0 .setIsBrowsable(false) \/\/ \u8fd9\u4e0d\u662f\u4e00\u4e2a\u53ef\u6d4f\u89c8\u7684\u6587\u4ef6\u5939\n\u00a0 .build()\n\n\/\/ 2. \u4f7f\u7528 MediaItem.Builder \u521b\u5efa\u5a92\u4f53\u9879\uff0c\u5e76\u9644\u52a0\u5143\u6570\u636e\nval mediaItem = MediaItem.Builder()\n\u00a0 .setMediaId(mediaId) \/\/ \u8bbe\u7f6e\u552f\u4e00\u7684\u5a92\u4f53 ID\n\u00a0 .setUri(audioUri) \/\/ \u8bbe\u7f6e\u53ef\u64ad\u653e\u7684 URI\n\u00a0 .setMediaMetadata(mediaMetadata) \/\/ \u5c06\u5143\u6570\u636e\u9644\u52a0\u5230 MediaItem\n\u00a0 .build()\n\n\/\/ 3. \u73b0\u5728\u53ef\u4ee5\u5c06\u8fd9\u4e2a mediaItem \u6dfb\u52a0\u5230 ExoPlayer \u7684\u64ad\u653e\u5217\u8868\u4e2d\n\/\/ player.setMediaItem(mediaItem)<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cmediaId \u548c uri \u7684\u5206\u79bb\u4f53\u73b0\u4e86\u4e00\u4e2a\u91cd\u8981\u7684\u67b6\u6784\u6a21\u5f0f\u3002mediaId \u662f\u4e00\u4e2a\u7a33\u5b9a\u4e14\u552f\u4e00\u7684\u6807\u8bc6\u7b26\uff0c\u4ee3\u8868\u5e94\u7528\u5185\u5bb9\u5e93\u4e2d\u7684\u4e00\u4e2a\u7279\u5b9a\u6761\u76ee\u3002\u800c uri \u662f\u8be5\u6761\u76ee\u53ef\u64ad\u653e\u7684\u8d44\u6e90\u5b9a\u4f4d\u7b26\uff0c\u5b83\u53ef\u80fd\u662f\u4e34\u65f6\u7684\u6216\u9700\u8981\u52a8\u6001\u89e3\u6790\u7684 <sup>11<\/sup>\u3002\u5728\u5178\u578b\u7684\u5ba2\u6237\u7aef-\u670d\u52a1\u67b6\u6784\u4e2d\uff0cUI \u5ba2\u6237\u7aef\u901a\u5e38\u53ea\u77e5\u9053<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">mediaId\u3002\u5b83\u4f1a\u6784\u5efa\u4e00\u4e2a\u53ea\u5305\u542b mediaId \u7684 MediaItem \u5e76\u53d1\u9001\u7ed9\u540e\u53f0\u7684 MediaSessionService\u3002\u670d\u52a1\u7684 MediaSession.Callback.onAddMediaItems \u56de\u8c03\u5219\u8d1f\u8d23\u63a5\u6536\u8fd9\u4e2a MediaItem\uff0c\u6839\u636e mediaId \u4ece\u6570\u636e\u5e93\u6216\u7f51\u7edc\u67e5\u8be2\u5b8c\u6574\u7684\u5143\u6570\u636e\u548c\u53ef\u64ad\u653e\u7684 uri\uff0c\u7136\u540e\u8fd4\u56de\u4e00\u4e2a\u201c\u5145\u5b9e\u201d\u8fc7\u7684 MediaItem <sup>12<\/sup>\u3002\u8fd9\u4e2a\u6a21\u5f0f\u5c06\u4e1a\u52a1\u903b\u8f91\uff08\u5982\u4ed8\u8d39\u5185\u5bb9\u9a8c\u8bc1\u3001URL \u751f\u6210\uff09\u4fdd\u7559\u5728\u5b89\u5168\u7684\u540e\u53f0\u670d\u52a1\u4e2d\uff0c\u662f\u6784\u5efa\u5065\u58ee\u5a92\u4f53\u5e94\u7528\u7684\u6700\u4f73\u5b9e\u8df5\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"23_%E9%AB%98%E7%BA%A7%E5%85%83%E6%95%B0%E6%8D%AE%EF%BC%9A%E4%BD%BF%E7%94%A8_extras_%E4%BC%A0%E9%80%92%E8%87%AA%E5%AE%9A%E4%B9%89%E6%95%B0%E6%8D%AE\"><\/span><strong>2.3 \u9ad8\u7ea7\u5143\u6570\u636e\uff1a\u4f7f\u7528 extras \u4f20\u9012\u81ea\u5b9a\u4e49\u6570\u636e<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">MediaMetadata.Builder \u8fd8\u63d0\u4f9b\u4e86 setExtras(Bundle) \u65b9\u6cd5\uff0c\u5141\u8bb8\u5f00\u53d1\u8005\u9644\u52a0\u4e00\u4e2a Bundle \u5bf9\u8c61\uff0c\u7528\u4e8e\u643a\u5e26\u4efb\u4f55\u81ea\u5b9a\u4e49\u6570\u636e <sup>10<\/sup>\u3002\u8fd9\u5bf9\u4e8e\u4f20\u9012\u5e94\u7528\u7279\u5b9a\u7684\u4fe1\u606f\u975e\u5e38\u6709\u7528\uff0c\u4f8b\u5982\u5185\u90e8\u5185\u5bb9 ID\u3001\u4e0b\u8f7d\u72b6\u6001\u6216\u81ea\u5b9a\u4e49\u6807\u5fd7\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">AndroidX Media \u5e93\u5b9a\u4e49\u4e86\u4e00\u4e9b\u6807\u51c6\u5316\u7684 extras \u952e\uff0c\u4f4d\u4e8e androidx.media3.common.MediaConstants \u4e2d\u3002\u4f8b\u5982\uff0cEXTRAS_KEY_COMPLETION_STATUS \u53ef\u4ee5\u7528\u6765\u6307\u793a\u4e00\u4e2a\u5a92\u4f53\u9879\u7684\u64ad\u653e\u72b6\u6001\uff08\u672a\u64ad\u653e\u3001\u90e8\u5206\u64ad\u653e\u3001\u5df2\u5b8c\u6210\uff09\u3002\u50cf Android Auto \u8fd9\u6837\u7684\u5ba2\u6237\u7aef\u4f1a\u8bfb\u53d6\u8fd9\u4e9b extras\uff0c\u5e76\u636e\u6b64\u5728 UI \u4e0a\u663e\u793a\u76f8\u5e94\u7684\u6307\u793a\u5668\uff08\u4f8b\u5982\uff0c\u4e00\u4e2a\u8868\u793a\u201c\u65b0\u5185\u5bb9\u201d\u7684\u5c0f\u5706\u70b9\uff09<sup>10<\/sup>\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import androidx.core.os.bundleOf\nimport androidx.media3.common.MediaConstants\n\n\/\/ \u521b\u5efa\u4e00\u4e2a\u5305\u542b\u64ad\u653e\u72b6\u6001\u7684 extras Bundle\nval extras = bundleOf(\n\u00a0 \u00a0 MediaConstants.EXTRAS_KEY_COMPLETION_STATUS to MediaConstants.EXTRAS_VALUE_COMPLETION_STATUS_NOT_PLAYED\n)\n\n\/\/ \u5728\u6784\u5efa MediaMetadata \u65f6\u8bbe\u7f6e extras\nval mediaMetadataWithExtras = MediaMetadata.Builder()\n\u00a0 .setTitle(\"New Podcast Episode\")\n\u00a0 \u00a0 \/\/... \u5176\u4ed6\u5143\u6570\u636e\n\u00a0 .setExtras(extras)\n\u00a0 .build()\n<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E8%A1%A8_21%EF%BC%9AMediaMetadataBuilder_%E5%85%B3%E9%94%AE%E6%96%B9%E6%B3%95%E4%B8%8E%E6%97%A7%E7%89%88_API_%E6%98%A0%E5%B0%84\"><\/span><strong>\u8868 2.1\uff1aMediaMetadata.Builder \u5173\u952e\u65b9\u6cd5\u4e0e\u65e7\u7248 API \u6620\u5c04<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u4e86\u5e2e\u52a9\u4ece\u65e7\u7248 MediaSessionCompat \u8fc1\u79fb\u7684\u5f00\u53d1\u8005\uff0c\u4e0b\u8868\u5217\u51fa\u4e86 Media3 MediaMetadata.Builder \u7684\u5173\u952e\u65b9\u6cd5\u4e0e\u5176\u5bf9\u5e94\u7684\u65e7\u7248 MediaMetadataCompat \u5b57\u7b26\u4e32\u952e\u7684\u6620\u5c04\u3002\u8fd9\u5bf9\u4e8e\u7406\u89e3 Media3 \u5982\u4f55\u4e0e\u65e7\u7248\u751f\u6001\u7cfb\u7edf\u4e92\u64cd\u4f5c\u81f3\u5173\u91cd\u8981\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Media3 Builder \u65b9\u6cd5<\/td><td>\u65e7\u7248 MediaMetadataCompat \u952e<\/td><td>\u6570\u636e\u7c7b\u578b<\/td><td>\u63cf\u8ff0\/\u7528\u4f8b<\/td><\/tr><tr><td>setTitle(CharSequence)<\/td><td>METADATA_KEY_TITLE<\/td><td>String<\/td><td>\u5a92\u4f53\u7684\u4e3b\u6807\u9898\uff0c\u5982\u6b4c\u66f2\u540d\u79f0\u3002<\/td><\/tr><tr><td>setArtist(CharSequence)<\/td><td>METADATA_KEY_ARTIST<\/td><td>String<\/td><td>\u5a92\u4f53\u7684\u4e3b\u8981\u8868\u6f14\u8005\u3002<\/td><\/tr><tr><td>setAlbumTitle(CharSequence)<\/td><td>METADATA_KEY_ALBUM_TITLE<\/td><td>String<\/td><td>\u5a92\u4f53\u6240\u5c5e\u4e13\u8f91\u7684\u6807\u9898\u3002<\/td><\/tr><tr><td>setAlbumArtist(CharSequence)<\/td><td>METADATA_KEY_ALBUM_ARTIST<\/td><td>String<\/td><td>\u4e13\u8f91\u7684\u8868\u6f14\u8005\u3002<\/td><\/tr><tr><td>setArtworkUri(Uri)<\/td><td>METADATA_KEY_ALBUM_ART_URI<\/td><td>String (URI)<\/td><td>\u6307\u5411\u4e13\u8f91\u5c01\u9762\u7684 URI\u3002<\/td><\/tr><tr><td>setArtworkData(byte, Integer)<\/td><td>METADATA_KEY_ALBUM_ART<\/td><td>Bitmap<\/td><td>\u5d4c\u5165\u7684\u5c01\u9762\u4f4d\u56fe\uff08\u4e0d\u63a8\u8350\uff09\u3002<\/td><\/tr><tr><td>setDisplayTitle(CharSequence)<\/td><td>METADATA_KEY_DISPLAY_TITLE<\/td><td>String<\/td><td>\u7528\u4e8e\u5728 UI \u4e2d\u663e\u793a\u7684\u6807\u9898\u3002<\/td><\/tr><tr><td>setSubtitle(CharSequence)<\/td><td>METADATA_KEY_DISPLAY_SUBTITLE<\/td><td>String<\/td><td>\u7528\u4e8e\u5728 UI \u4e2d\u663e\u793a\u7684\u526f\u6807\u9898\u3002<\/td><\/tr><tr><td>setDescription(CharSequence)<\/td><td>METADATA_KEY_DISPLAY_DESCRIPTION<\/td><td>String<\/td><td>\u7528\u4e8e\u5728 UI \u4e2d\u663e\u793a\u7684\u63cf\u8ff0\u3002<\/td><\/tr><tr><td>setTrackNumber(Integer)<\/td><td>METADATA_KEY_TRACK_NUMBER<\/td><td>Long<\/td><td>\u5a92\u4f53\u5728\u4e13\u8f91\u4e2d\u7684\u66f2\u76ee\u7f16\u53f7\u3002<\/td><\/tr><tr><td>setTotalTrackCount(Integer)<\/td><td>METADATA_KEY_NUM_TRACKS<\/td><td>Long<\/td><td>\u4e13\u8f91\u7684\u603b\u66f2\u76ee\u6570\u3002<\/td><\/tr><tr><td>setDurationMs(Long)<\/td><td>METADATA_KEY_DURATION<\/td><td>Long<\/td><td>\u5a92\u4f53\u7684\u65f6\u957f\uff08\u6beb\u79d2\uff09\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7\u7cbe\u5fc3\u6784\u5efa MediaItem \u548c MediaMetadata\uff0c\u5f00\u53d1\u8005\u5c31\u4e3a\u5143\u6570\u636e\u5728 Media3 \u751f\u6001\u7cfb\u7edf\u4e2d\u7684\u6f2b\u957f\u65c5\u7a0b\u6253\u4e0b\u4e86\u575a\u5b9e\u7684\u57fa\u7840\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E7%AC%AC_3_%E8%8A%82%EF%BC%9A%E6%92%AD%E6%94%BE%E5%99%A8%E4%BD%9C%E4%B8%BA%E7%9C%9F%E7%90%86%E4%B9%8B%E6%BA%90\"><\/span><strong>\u7b2c 3 \u8282\uff1a\u64ad\u653e\u5668\u4f5c\u4e3a\u771f\u7406\u4e4b\u6e90<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u65e6\u4e00\u4e2a\u5305\u542b\u5143\u6570\u636e\u7684 MediaItem \u88ab\u63d0\u4ea4\u7ed9 Player\uff08\u4f8b\u5982\uff0c\u901a\u8fc7 player.setMediaItem()\uff09\uff0cPlayer \u5b9e\u4f8b\u5c31\u6210\u4e3a\u4e86\u5f53\u524d\u6b63\u5728\u64ad\u653e\u7684\u5a92\u4f53\u6240\u6709\u72b6\u6001\u7684\u552f\u4e00\u3001\u6743\u5a01\u7684\u5185\u90e8\u201c\u771f\u7406\u4e4b\u6e90\u201d\uff08Source of Truth\uff09<sup>3<\/sup>\u3002\u6240\u6709\u540e\u7eed\u7684\u5143\u6570\u636e\u53d8\u5316\uff0c\u65e0\u8bba\u662f\u6765\u81ea\u5e94\u7528\u5185\u90e8\u7684\u66f4\u65b0\u8fd8\u662f\u5a92\u4f53\u6d41\u672c\u8eab\uff0c\u90fd\u5c06\u901a\u8fc7<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Player \u8fdb\u884c\u5904\u7406\u548c\u5206\u53d1\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"31_PlayerListener_%E4%BA%8B%E4%BB%B6%E6%80%BB%E7%BA%BF\"><\/span><strong>3.1 Player.Listener \u4e8b\u4ef6\u603b\u7ebf<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Player.Listener \u662f\u4e00\u4e2a\u6838\u5fc3\u63a5\u53e3\uff0c\u5b83\u5145\u5f53\u4e86\u89c2\u5bdf\u64ad\u653e\u5668\u72b6\u6001\u53d8\u5316\u7684\u4e8b\u4ef6\u603b\u7ebf\u3002\u4efb\u4f55\u5173\u5fc3\u64ad\u653e\u5668\u72b6\u6001\u7684\u7ec4\u4ef6\uff08\u5305\u62ec\u5e94\u7528 UI\u3001MediaSession \u7b49\uff09\u90fd\u9700\u8981\u6ce8\u518c\u4e00\u4e2a Player.Listener\u3002\u5bf9\u4e8e\u5143\u6570\u636e\u4f20\u9012\uff0c\u4ee5\u4e0b\u51e0\u4e2a\u56de\u8c03\u65b9\u6cd5\u5c24\u4e3a\u91cd\u8981\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>onMediaMetadataChanged(MediaMetadata mediaMetadata):<\/strong> \u8fd9\u662f\u672c\u62a5\u544a\u4e3b\u9898\u4e2d\u6700\u91cd\u8981\u7684\u56de\u8c03\u3002\u6bcf\u5f53\u5f53\u524d\u64ad\u653e\u9879\u7684 MediaMetadata \u53d1\u751f\u53d8\u5316\u65f6\uff0c\u6b64\u65b9\u6cd5\u5c31\u4f1a\u88ab\u8c03\u7528 <sup>8<\/sup>\u3002\u5b83\u7684\u89e6\u53d1\u4e3b\u8981\u6709\u4e09\u79cd\u60c5\u51b5\uff1a<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u64ad\u653e\u5217\u8868\u5207\u6362 (Playlist Transitions):<\/strong> \u5f53\u64ad\u653e\u5668\u4ece\u4e00\u4e2a MediaItem \u5207\u6362\u5230\u53e6\u4e00\u4e2a\u65f6\uff0c\u4f8b\u5982\u7528\u6237\u70b9\u51fb\u201c\u4e0b\u4e00\u9996\u201d\u6216\u5f53\u524d\u6b4c\u66f2\u81ea\u7136\u64ad\u653e\u5b8c\u6bd5\uff0conMediaItemTransition \u4f1a\u9996\u5148\u88ab\u8c03\u7528\uff0c\u7d27\u63a5\u7740 onMediaMetadataChanged \u4f1a\u5e26\u7740\u65b0\u5a92\u4f53\u9879\u7684\u5143\u6570\u636e\u88ab\u8c03\u7528 <sup>14<\/sup>\u3002<\/li>\n\n\n\n<li><strong>\u6d41\u5185\u5143\u6570\u636e\u66f4\u65b0 (In-Stream Metadata Updates):<\/strong> \u5bf9\u4e8e\u67d0\u4e9b\u6d41\u5a92\u4f53\u683c\u5f0f\uff0c\u5982 HLS \u6216\u4f7f\u7528 ICY \u534f\u8bae\uff08Shoutcast\/Icecast\uff09\u7684\u7f51\u7edc\u7535\u53f0\uff0c\u5143\u6570\u636e\uff08\u5982\u6b63\u5728\u64ad\u653e\u7684\u6b4c\u66f2\u4fe1\u606f\uff09\u662f\u5d4c\u5165\u5728\u5a92\u4f53\u6d41\u4e2d\u7684\u3002ExoPlayer \u80fd\u591f\u89e3\u6790\u8fd9\u4e9b\u6570\u636e\uff08\u4f8b\u5982 ID3 \u6807\u7b7e\u6216 ICY \u6807\u5934\uff09\uff0c\u5e76\u901a\u8fc7 onMetadata \u56de\u8c03\u4e0a\u62a5\u3002\u8fd9\u4e9b\u4fe1\u606f\u968f\u540e\u4f1a\u88ab\u7528\u6765\u66f4\u65b0 Player \u7684\u4e3b MediaMetadata\uff0c\u5e76\u6700\u7ec8\u89e6\u53d1 onMediaMetadataChanged <sup>14<\/sup>\u3002\u8fd9\u5bf9\u4e8e\u7535\u53f0\u7c7b\u5e94\u7528\u81f3\u5173\u91cd\u8981\uff0c\u56e0\u4e3a\u5b83\u4eec\u5728\u540c\u4e00\u4e2a\u8fde\u7eed\u7684\u6d41\u4e2d\u4f1a\u9891\u7e41\u66f4\u6362\u6b4c\u66f2\u4fe1\u606f\u3002<\/li>\n\n\n\n<li><strong>\u663e\u5f0f\u4e2d\u9014\u66f4\u65b0 (Explicit Mid-Playback Updates):<\/strong> \u5f00\u53d1\u8005\u53ef\u4ee5\u5728\u4e0d\u4e2d\u65ad\u64ad\u653e\u7684\u60c5\u51b5\u4e0b\uff0c\u901a\u8fc7\u8c03\u7528 player.replaceMediaItem() \u6765\u66f4\u65b0\u5f53\u524d\u64ad\u653e\u9879\u7684\u5143\u6570\u636e\u3002\u4f8b\u5982\uff0c\u5f53\u7528\u6237\u7ed9\u4e00\u9996\u6b4c\u70b9\u201c\u559c\u6b22\u201d\u65f6\uff0c\u5e94\u7528\u53ef\u4ee5\u66f4\u65b0\u5143\u6570\u636e\u4e2d\u7684 userRating \u5b57\u6bb5\u5e76\u66ff\u6362\u5f53\u524d\u9879\uff0c\u8fd9\u4f1a\u7acb\u5373\u89e6\u53d1 onMediaMetadataChanged <sup>16<\/sup>\u3002<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>onMediaItemTransition(MediaItem mediaItem, @MediaItemTransitionReason int reason):<\/strong> \u6b64\u56de\u8c03\u5728\u64ad\u653e\u5668\u5373\u5c06\u5207\u6362\u5230\u4e00\u4e2a\u65b0\u7684\u5a92\u4f53\u9879\u65f6\u88ab\u8c03\u7528\u3002\u5b83\u53d1\u751f\u5728 onMediaMetadataChanged \u4e4b\u524d\u3002reason \u53c2\u6570\u63d0\u4f9b\u4e86\u5207\u6362\u7684\u4e0a\u4e0b\u6587\uff0c\u4f8b\u5982 REASON_AUTO\uff08\u81ea\u52a8\u5207\u6362\uff09\u3001REASON_SEEK\uff08\u7528\u6237\u64cd\u4f5c\uff0c\u5982\u8c03\u7528 player.next()\uff09\u6216 REASON_PLAYLIST_CHANGED\uff08\u64ad\u653e\u5217\u8868\u88ab\u4fee\u6539\uff09<sup>14<\/sup>\u3002<\/li>\n\n\n\n<li><strong>onMetadata(Metadata metadata):<\/strong> \u8fd9\u662f\u4e00\u4e2a\u66f4\u4f4e\u7ea7\u522b\u7684\u56de\u8c03\uff0c\u7528\u4e8e\u62a5\u544a\u5728\u6d41\u4e2d\u9047\u5230\u7684\u5e26\u65f6\u95f4\u6233\u7684\u5143\u6570\u636e\uff0c\u5982\u5d4c\u5165\u5728 MP3 \u6587\u4ef6\u4e2d\u7684 ID3 \u5e27\u6216 DASH \u6d41\u4e2d\u7684 EMSG box\u3002\u8fd9\u4e9b\u5143\u6570\u636e\u901a\u5e38\u662f\u52a8\u6001\u7684\uff0c\u5e76\u4e14\u4e0e\u7279\u5b9a\u7684\u64ad\u653e\u65f6\u95f4\u70b9\u76f8\u5173\u8054\u3002Player \u4f1a\u4f7f\u7528\u8fd9\u4e9b\u4fe1\u606f\u6765\u66f4\u65b0\u5176\u6574\u4f53\u7684 MediaMetadata <sup>14<\/sup>\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"32_%E4%BB%A3%E7%A0%81%E5%AE%9E%E7%8E%B0%EF%BC%9A%E4%BB%8E%E6%92%AD%E6%94%BE%E5%99%A8%E4%BA%8B%E4%BB%B6%E6%9B%B4%E6%96%B0_UI\"><\/span><strong>3.2 \u4ee3\u7801\u5b9e\u73b0\uff1a\u4ece\u64ad\u653e\u5668\u4e8b\u4ef6\u66f4\u65b0 UI<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u5e94\u7528\u7684 Activity\u3001Fragment \u6216 Service \u4e2d\u6ce8\u518c\u4e00\u4e2a Player.Listener \u662f\u54cd\u5e94\u5143\u6570\u636e\u53d8\u5316\u7684\u6807\u51c6\u505a\u6cd5\u3002\u4ee5\u4e0b\u4ee3\u7801\u6f14\u793a\u4e86\u5982\u4f55\u76d1\u542c onMediaMetadataChanged \u5e76\u7528\u5b83\u6765\u66f4\u65b0\u4e00\u4e2a\u663e\u793a\u6b4c\u66f2\u6807\u9898\u7684 TextView\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5728 Activity \u6216 Service \u4e2d\nprivate val playerListener = object : Player.Listener {\n\u00a0 \u00a0 override fun onMediaMetadataChanged(mediaMetadata: MediaMetadata) {\n\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u5f53\u5143\u6570\u636e\u53d8\u5316\u65f6\uff0c\u6b64\u56de\u8c03\u88ab\u89e6\u53d1\n\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u8fd9\u662f\u66f4\u65b0 UI \u7684\u6700\u53ef\u9760\u4f4d\u7f6e\n\u00a0 \u00a0 \u00a0 \u00a0 val title = mediaMetadata.title?: \"\u672a\u77e5\u6807\u9898\"\n\u00a0 \u00a0 \u00a0 \u00a0 val artist = mediaMetadata.artist?: \"\u672a\u77e5\u827a\u672f\u5bb6\"\n\n\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u5047\u8bbe\u6709\u4e00\u4e2a TextView \u7528\u4e8e\u663e\u793a\u6807\u9898\n\u00a0 \u00a0 \u00a0 \u00a0 \/\/ textViewTitle.text = title\n\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u5047\u8bbe\u6709\u4e00\u4e2a TextView \u7528\u4e8e\u663e\u793a\u827a\u672f\u5bb6\n\u00a0 \u00a0 \u00a0 \u00a0 \/\/ textViewArtist.text = artist\n\u00a0 \u00a0 \u00a0 \u00a0\n\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u4e5f\u53ef\u4ee5\u5728\u8fd9\u91cc\u5904\u7406\u5c01\u9762\u56fe\u66f4\u65b0\n\u00a0 \u00a0 \u00a0 \u00a0 \/\/ if (mediaMetadata.artworkUri!= null) {\n\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u00a0 \u00a0 Glide.with(this@MyActivity).load(mediaMetadata.artworkUri).into(imageViewArtwork)\n\u00a0 \u00a0 \u00a0 \u00a0 \/\/ }\n\u00a0 \u00a0 \u00a0 \u00a0\n\u00a0 \u00a0 \u00a0 \u00a0 Log.d(\"PlayerListener\", \"\u5143\u6570\u636e\u5df2\u66f4\u65b0: \u6807\u9898 = $title, \u827a\u672f\u5bb6 = $artist\")\n\u00a0 \u00a0 }\n}\n\n\/\/ \u5728\u5408\u9002\u7684\u65f6\u673a\uff08\u5982 onStart\uff09\u6ce8\u518c\u76d1\u542c\u5668\n\/\/ player.addListener(playerListener)\n\n\/\/ \u5728\u4e0d\u518d\u9700\u8981\u65f6\uff08\u5982 onStop\uff09\u79fb\u9664\u76d1\u542c\u5668\n\/\/ player.removeListener(playerListener)<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"33_%E5%8A%A8%E6%80%81%E5%85%83%E6%95%B0%E6%8D%AE%E6%9B%B4%E6%96%B0\"><\/span><strong>3.3 \u52a8\u6001\u5143\u6570\u636e\u66f4\u65b0<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u4e2a\u5e38\u89c1\u7684\u573a\u666f\u662f\uff0c\u5728\u6b4c\u66f2\u64ad\u653e\u671f\u95f4\u9700\u8981\u66f4\u65b0\u5176\u5143\u6570\u636e\uff0c\u4f8b\u5982\u7528\u6237\u6536\u85cf\u4e86\u6b4c\u66f2\u6216\u66f4\u6539\u4e86\u8bc4\u5206\u3002\u6b63\u786e\u7684\u505a\u6cd5\u662f\u4f7f\u7528 player.replaceMediaItem()\u3002\u8fd9\u53ef\u4ee5\u65e0\u7f1d\u5730\u66ff\u6362\u64ad\u653e\u5217\u8868\u4e2d\u7684\u9879\uff0c\u800c\u4e0d\u4f1a\u5bfc\u81f4\u64ad\u653e\u4e2d\u65ad\u6216\u91cd\u65b0\u7f13\u51b2\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">fun updateUserRatingForCurrentSong(newRating: Rating) {\n\u00a0 \u00a0 val player = this.player?: return\n\u00a0 \u00a0 val currentItem = player.currentMediaItem?: return\n\u00a0 \u00a0 val currentIndex = player.currentMediaItemIndex\n\n\u00a0 \u00a0 \/\/ 1. \u57fa\u4e8e\u73b0\u6709\u5143\u6570\u636e\u521b\u5efa\u4e00\u4e2a\u65b0\u7684 MediaMetadata.Builder\n\u00a0 \u00a0 val newMetadata = currentItem.mediaMetadata.buildUpon()\n\u00a0 \u00a0 \u00a0 .setUserRating(newRating)\n\u00a0 \u00a0 \u00a0 .build()\n\n\u00a0 \u00a0 \/\/ 2. \u57fa\u4e8e\u73b0\u6709 MediaItem \u521b\u5efa\u4e00\u4e2a\u65b0\u7684 MediaItem.Builder\uff0c\u5e76\u8bbe\u7f6e\u65b0\u7684\u5143\u6570\u636e\n\u00a0 \u00a0 val updatedMediaItem = currentItem.buildUpon()\n\u00a0 \u00a0 \u00a0 .setMediaMetadata(newMetadata)\n\u00a0 \u00a0 \u00a0 .build()\n\n\u00a0 \u00a0 \/\/ 3. \u4f7f\u7528\u65b0\u7684 MediaItem \u66ff\u6362\u64ad\u653e\u5217\u8868\u4e2d\u7684\u5f53\u524d\u9879\n\u00a0 \u00a0 \/\/ \u7b2c\u4e8c\u4e2a\u53c2\u6570 `resetPosition` \u8bbe\u4e3a false\uff0c\u4ee5\u4fdd\u6301\u5f53\u524d\u7684\u64ad\u653e\u4f4d\u7f6e\n\u00a0 \u00a0 player.replaceMediaItem(currentIndex, updatedMediaItem)\n\u00a0 \u00a0\n\u00a0 \u00a0 \/\/ \u8fd9\u4e2a\u8c03\u7528\u4f1a\u7acb\u5373\u89e6\u53d1 onMediaMetadataChanged \u56de\u8c03\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E8%A1%A8_31%EF%BC%9APlayerListener_%E5%85%83%E6%95%B0%E6%8D%AE%E7%9B%B8%E5%85%B3%E5%9B%9E%E8%B0%83%E5%AF%B9%E6%AF%94\"><\/span><strong>\u8868 3.1\uff1aPlayer.Listener \u5143\u6570\u636e\u76f8\u5173\u56de\u8c03\u5bf9\u6bd4<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u4e86\u6d88\u9664\u5f00\u53d1\u8005\u5728 onMediaMetadataChanged\u3001onMediaItemTransition \u548c onMetadata \u4e4b\u95f4\u7684\u6df7\u6dc6\uff0c\u4e0b\u8868\u6e05\u6670\u5730\u9610\u8ff0\u4e86\u5b83\u4eec\u7684\u533a\u522b\u548c\u9002\u7528\u573a\u666f\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>\u56de\u8c03\u65b9\u6cd5<\/td><td>\u8c03\u7528\u65f6\u673a<\/td><td>\u4e3b\u8981\u7528\u4f8b<\/td><td>\u5173\u952e\u53c2\u6570<\/td><\/tr><tr><td>onMediaItemTransition<\/td><td>\u5f53\u64ad\u653e\u5668\u5207\u6362\u5230\u64ad\u653e\u5217\u8868\u4e2d\u7684<strong>\u4e0d\u540c<\/strong>\u5a92\u4f53\u9879\u65f6\u3002<\/td><td>\u68c0\u6d4b\u66f2\u76ee\u5207\u6362\u53ca\u5176\u539f\u56e0\uff08\u81ea\u52a8\u3001\u8df3\u8fc7\u7b49\uff09\u3002<\/td><td>mediaItem, reason<\/td><\/tr><tr><td>onMediaMetadataChanged<\/td><td>\u5f53<strong>\u5f53\u524d<\/strong>\u64ad\u653e\u9879\u7684 MediaMetadata \u56e0\u4efb\u4f55\u539f\u56e0\uff08\u5207\u6362\u3001\u6d41\u5185\u66f4\u65b0\u3001\u624b\u52a8\u66ff\u6362\uff09\u53d1\u751f\u53d8\u5316\u65f6\u3002<\/td><td>\u66f4\u65b0\u4e3b\u8981\u7684 UI \u5143\u7d20\uff08\u6807\u9898\u3001\u827a\u672f\u5bb6\u3001\u5c01\u9762\uff09\u3002\u662f\u663e\u793a\u5143\u6570\u636e\u7684\u6700\u7ec8\u3001\u6700\u53ef\u9760\u7684\u6765\u6e90\u3002<\/td><td>mediaMetadata<\/td><\/tr><tr><td>onMetadata<\/td><td>\u5f53\u5728\u5a92\u4f53\u6d41\u4e2d\u9047\u5230\u5e26\u65f6\u95f4\u6233\u7684\u5143\u6570\u636e\u65f6\uff08\u5982 ID3\u3001ICY\uff09\u3002<\/td><td>\u5904\u7406\u5b9e\u65f6\u7684\u3001\u65f6\u95f4\u540c\u6b65\u7684\u6d41\u5185\u6570\u636e\uff0c\u5982\u5e7f\u544a\u6807\u8bb0\u3001\u7535\u53f0\u76f4\u64ad\u4e2d\u7684\u6b4c\u66f2\u4fe1\u606f\u3002<\/td><td>Metadata (\u5305\u542b Metadata.Entry \u7684\u96c6\u5408)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ece\u8868\u4e2d\u53ef\u4ee5\u770b\u51fa\uff0c\u5bf9\u4e8e\u5927\u591a\u6570 UI \u66f4\u65b0\u9700\u6c42\uff0conMediaMetadataChanged \u662f\u6700\u5408\u9002\u7684\u9009\u62e9\uff0c\u56e0\u4e3a\u5b83\u6574\u5408\u4e86\u6240\u6709\u6765\u6e90\u7684\u5143\u6570\u636e\u66f4\u65b0\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u5143\u6570\u636e\u7684\u89e3\u6790\u548c\u53ef\u7528\u6027\u53ef\u80fd\u662f\u5f02\u6b65\u7684\u3002\u5982 <sup>22<\/sup> \u4e2d\u6240\u8ba8\u8bba\uff0c\u5f53\u4e00\u4e2a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">MediaItem \u88ab\u6dfb\u52a0\u5230\u64ad\u653e\u5217\u8868\u65f6\uff0c\u5176\u5b8c\u6574\u7684\u5143\u6570\u636e\u53ef\u80fd\u9700\u8981\u4ece\u7f51\u7edc\u83b7\u53d6\uff0c\u8fd9\u4f1a\u5bfc\u81f4\u4e00\u4e2a\u5ef6\u8fdf\u3002\u56e0\u6b64\uff0cUI \u53ef\u80fd\u4f1a\u5148\u6536\u5230\u4e00\u4e2a\u5e26\u6709\u90e8\u5206\u6570\u636e\u7684 onMediaItemTransition \u56de\u8c03\uff0c\u7a0d\u540e\u624d\u4f1a\u6536\u5230\u4e00\u4e2a\u5e26\u6709\u5b8c\u6574\u6570\u636e\u7684 onMediaMetadataChanged \u56de\u8c03\u3002\u5065\u58ee\u7684 UI \u5b9e\u73b0\u5e94\u8be5\u80fd\u591f\u5904\u7406\u8fd9\u79cd\u4e24\u9636\u6bb5\u7684\u66f4\u65b0\uff0c\u5373\u5728\u8fc7\u6e21\u65f6\u5148\u663e\u793a\u57fa\u672c\u4fe1\u606f\uff0c\u5728\u5143\u6570\u636e\u5b8c\u5168\u53ef\u7528\u65f6\u518d\u5237\u65b0\u5b8c\u6574\u4fe1\u606f\u3002\u8fd9\u79cd\u8bbe\u8ba1\u4f53\u73b0\u4e86 Player \u4f5c\u4e3a\u5185\u90e8\u72b6\u6001\u9a71\u52a8\u5f15\u64ce\u7684\u6838\u5fc3\u5730\u4f4d\uff1a\u6240\u6709\u72b6\u6001\u53d8\u66f4\u90fd\u6d41\u7ecf\u64ad\u653e\u5668\uff0c\u7136\u540e\u901a\u8fc7 Player.Listener \u63a5\u53e3\u5411\u5916\u5e7f\u64ad\uff0c\u800c MediaSession \u6b63\u662f\u8fd9\u4e2a\u63a5\u53e3\u7684\u4e00\u4e2a\u91cd\u8981\u5b9e\u73b0\u8005\uff0c\u4ece\u800c\u5b9e\u73b0\u4e86\u72b6\u6001\u7684\u81ea\u52a8\u540c\u6b65\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E7%AC%AC_4_%E8%8A%82%EF%BC%9A%E5%90%91%E7%B3%BB%E7%BB%9F%E5%B9%BF%E6%92%AD%EF%BC%9AMediaSession_%E6%A1%A5%E6%A2%81\"><\/span><strong>\u7b2c 4 \u8282\uff1a\u5411\u7cfb\u7edf\u5e7f\u64ad\uff1aMediaSession \u6865\u6881<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u8bf4 Player \u662f\u5a92\u4f53\u5e94\u7528\u5185\u90e8\u72b6\u6001\u7684\u201c\u5fc3\u810f\u201d\uff0c\u90a3\u4e48 MediaSession \u5c31\u662f\u8fde\u63a5\u8fd9\u4e2a\u5fc3\u810f\u4e0e\u5916\u90e8\u4e16\u754c\u7684\u201c\u5927\u52a8\u8109\u201d\u3002\u5b83\u5c06\u64ad\u653e\u5668\u7684\u5185\u90e8\u72b6\u6001\u4ee5\u4e00\u79cd\u6807\u51c6\u5316\u7684\u65b9\u5f0f\u5e7f\u64ad\u7ed9\u6574\u4e2a Android \u7cfb\u7edf\uff0c\u4f7f\u5176\u53ef\u88ab\u53d1\u73b0\u3001\u53ef\u88ab\u63a7\u5236 <sup>1<\/sup>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"41_MediaSession_%E4%BD%9C%E4%B8%BA%E5%85%AC%E5%85%B1_API\"><\/span><strong>4.1 MediaSession \u4f5c\u4e3a\u516c\u5171 API<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">MediaSession \u7684\u6838\u5fc3\u804c\u8d23\u662f\u5145\u5f53\u5e94\u7528\u64ad\u653e\u5668\u7684\u516c\u5171 API\u3002\u5b83\u521b\u5efa\u4e86\u4e00\u4e2a\u7edf\u4e00\u7684\u4ea4\u4e92\u70b9\uff0c\u4efb\u4f55\u7ecf\u8fc7\u6388\u6743\u7684\u5916\u90e8\u5ba2\u6237\u7aef\uff08\u5982\u7cfb\u7edf UI\u3001Android Auto\u3001Google Assistant\u3001\u84dd\u7259\u8bbe\u5907\u7b49\uff09\u90fd\u53ef\u4ee5\u901a\u8fc7\u8fd9\u4e2a\u70b9\u6765\u67e5\u8be2\u64ad\u653e\u72b6\u6001\u3001\u83b7\u53d6\u5143\u6570\u636e\u4ee5\u53ca\u53d1\u9001\u64ad\u653e\u547d\u4ee4\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"42_%E8%87%AA%E5%8A%A8%E7%8A%B6%E6%80%81%E5%90%8C%E6%AD%A5\"><\/span><strong>4.2 \u81ea\u52a8\u72b6\u6001\u540c\u6b65<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Media3 \u6700\u663e\u8457\u7684\u6539\u8fdb\u4e4b\u4e00\u662f MediaSession \u548c Player \u4e4b\u95f4\u7684\u81ea\u52a8\u72b6\u6001\u540c\u6b65\u3002\u5f53\u60a8\u901a\u8fc7 MediaSession.Builder(context, player) \u521b\u5efa\u4e00\u4e2a MediaSession \u5b9e\u4f8b\u65f6\uff0cMedia3 \u6846\u67b6\u4f1a\u5728\u5185\u90e8\u81ea\u52a8\u5b8c\u6210\u4ee5\u4e0b\u5de5\u4f5c\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>MediaSession \u5185\u90e8\u4f1a\u521b\u5efa\u4e00\u4e2a Player.Listener\u3002<\/li>\n\n\n\n<li>\u8fd9\u4e2a\u76d1\u542c\u5668\u4f1a\u88ab\u6ce8\u518c\u5230\u60a8\u4f20\u5165\u7684 player \u5b9e\u4f8b\u4e0a\u3002<\/li>\n\n\n\n<li>\u5f53 player \u7684\u72b6\u6001\u53d1\u751f\u53d8\u5316\u65f6\uff08\u4f8b\u5982\uff0c\u8c03\u7528 onMediaMetadataChanged\uff09\uff0cMediaSession \u7684\u5185\u90e8\u76d1\u542c\u5668\u4f1a\u6355\u83b7\u5230\u8fd9\u4e2a\u4e8b\u4ef6\u3002<\/li>\n\n\n\n<li>MediaSession \u4f1a\u6839\u636e\u63a5\u6536\u5230\u7684\u65b0\u72b6\u6001\uff0c\u66f4\u65b0\u5176\u5185\u90e8\u7ef4\u62a4\u7684 MediaMetadataCompat \u548c PlaybackStateCompat \u5bf9\u8c61\u3002<\/li>\n\n\n\n<li>\u6700\u540e\uff0cMediaSession \u4f1a\u5c06\u8fd9\u4e9b\u66f4\u65b0\u901a\u77e5\u7ed9\u6240\u6709\u5df2\u8fde\u63a5\u7684 MediaController\u3002<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e2a\u65e0\u7f1d\u7684\u81ea\u52a8\u5316\u6d41\u7a0b\u5f7b\u5e95\u53d6\u4ee3\u4e86\u65e7\u7248 MediaSessionConnector \u7684\u624b\u52a8\u7ed1\u5b9a\u548c\u72b6\u6001\u8f6c\u6362\u903b\u8f91\uff0c\u6781\u5927\u5730\u7b80\u5316\u4e86\u5f00\u53d1\u5de5\u4f5c <sup>1<\/sup>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"43_%E5%9C%A8_MediaSessionService_%E4%B8%AD%E6%89%98%E7%AE%A1\"><\/span><strong>4.3 \u5728 MediaSessionService \u4e2d\u6258\u7ba1<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u4e86\u5b9e\u73b0\u53ef\u9760\u7684\u540e\u53f0\u64ad\u653e\uff08\u4f8b\u5982\uff0c\u5728\u7528\u6237\u9501\u5c4f\u6216\u5207\u6362\u5230\u5176\u4ed6\u5e94\u7528\u540e\u7ee7\u7eed\u64ad\u653e\u97f3\u4e50\uff09\uff0cPlayer \u548c MediaSession \u5b9e\u4f8b\u5fc5\u987b\u6258\u7ba1\u5728\u4e00\u4e2a\u524d\u53f0\u670d\u52a1 (Foreground Service) \u4e2d\u3002Media3 \u4e3a\u6b64\u63d0\u4f9b\u4e86 MediaSessionService \u57fa\u7c7b\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0b\u662f\u4e00\u4e2a\u5178\u578b\u7684 MediaSessionService \u5b9e\u73b0\u9aa8\u67b6\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import androidx.media3.common.Player\nimport androidx.media3.exoplayer.ExoPlayer\nimport androidx.media3.session.MediaSession\nimport androidx.media3.session.MediaSessionService\n\nclass PlaybackService : MediaSessionService() {\n\n\u00a0 \u00a0 private var mediaSession: MediaSession? = null\n\u00a0 \u00a0 private var player: Player? = null\n\n\u00a0 \u00a0 \/\/ \u5f53\u7b2c\u4e00\u4e2a\u63a7\u5236\u5668\u8fde\u63a5\u65f6\uff0c\u670d\u52a1\u88ab\u521b\u5efa\n\u00a0 \u00a0 override fun onCreate() {\n\u00a0 \u00a0 \u00a0 \u00a0 super.onCreate()\n\u00a0 \u00a0 \u00a0 \u00a0 \/\/ 1. \u521b\u5efa\u64ad\u653e\u5668\u5b9e\u4f8b\n\u00a0 \u00a0 \u00a0 \u00a0 player = ExoPlayer.Builder(this).build()\n\u00a0 \u00a0 \u00a0 \u00a0 \/\/ 2. \u521b\u5efa MediaSession \u5e76\u4e0e\u64ad\u653e\u5668\u5173\u8054\n\u00a0 \u00a0 \u00a0 \u00a0 mediaSession = MediaSession.Builder(this, player!!)\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u53ef\u4ee5\u8bbe\u7f6e\u4e00\u4e2a\u56de\u8c03\u6765\u5904\u7406\u81ea\u5b9a\u4e49\u547d\u4ee4\u6216\u8fde\u63a5\u8bf7\u6c42\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/.setCallback(MyMediaSessionCallback())\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 .build()\n\u00a0 \u00a0 }\n\n\u00a0 \u00a0 \/\/ \u5f53\u63a7\u5236\u5668\u8fde\u63a5\u65f6\uff0c\u8fd4\u56de MediaSession \u5b9e\u4f8b\n\u00a0 \u00a0 \/\/ \u8fd9\u662f\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u5efa\u7acb\u8fde\u63a5\u7684\u5165\u53e3\u70b9\n\u00a0 \u00a0 override fun onGetSession(controllerInfo: MediaSession.ControllerInfo): MediaSession? {\n\u00a0 \u00a0 \u00a0 \u00a0 return mediaSession\n\u00a0 \u00a0 }\n\n\u00a0 \u00a0 \/\/ \u5f53\u670d\u52a1\u88ab\u9500\u6bc1\u65f6\uff0c\u91ca\u653e\u6240\u6709\u8d44\u6e90\n\u00a0 \u00a0 override fun onDestroy() {\n\u00a0 \u00a0 \u00a0 \u00a0 mediaSession?.run {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u5728\u91ca\u653e\u4f1a\u8bdd\u4e4b\u524d\uff0c\u5148\u91ca\u653e\u64ad\u653e\u5668\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.player.release()\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 release()\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 mediaSession = null\n\u00a0 \u00a0 \u00a0 \u00a0 }\n\u00a0 \u00a0 \u00a0 \u00a0 player = null\n\u00a0 \u00a0 \u00a0 \u00a0 super.onDestroy()\n\u00a0 \u00a0 }\n}<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">MediaSessionService \u7684\u751f\u547d\u5468\u671f\u4e0e\u63a7\u5236\u5668\u8fde\u63a5\u7d27\u5bc6\u76f8\u5173\u3002\u670d\u52a1\u5728\u7b2c\u4e00\u4e2a MediaController \u8fde\u63a5\u65f6\u521b\u5efa (onCreate)\uff0c\u5728\u6700\u540e\u4e00\u4e2a MediaController \u65ad\u5f00\u8fde\u63a5\u4e14\u64ad\u653e\u505c\u6b62\u540e\u624d\u4f1a\u88ab\u9500\u6bc1 (onDestroy) <sup>25<\/sup>\u3002\u8fd9\u786e\u4fdd\u4e86\u5373\u4f7f\u5e94\u7528\u7684 UI \u4e0d\u53ef\u89c1\uff0c\u64ad\u653e\u4e5f\u80fd\u6301\u7eed\u8fdb\u884c\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"44_MediaSessionToken%EF%BC%9A%E9%80%9A%E5%BE%80%E7%8E%8B%E5%9B%BD%E7%9A%84%E9%92%A5%E5%8C%99\"><\/span><strong>4.4 MediaSession.Token\uff1a\u901a\u5f80\u738b\u56fd\u7684\u94a5\u5319<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">MediaSession.Token \u662f\u4e00\u4e2a\u53ef\u5e8f\u5217\u5316 (Parcelable) \u7684\u8f7b\u91cf\u7ea7\u5bf9\u8c61\uff0c\u5b83\u552f\u4e00\u5730\u6807\u8bc6\u5e76\u4ee3\u8868\u4e00\u4e2a MediaSession\u3002\u5b83\u5c31\u50cf\u4e00\u628a\u201c\u94a5\u5319\u201d\uff0c\u5916\u90e8\u5ba2\u6237\u7aef\u5fc5\u987b\u6301\u6709\u8fd9\u628a\u94a5\u5319\u624d\u80fd\u521b\u5efa MediaController \u5e76\u8bf7\u6c42\u8fde\u63a5\u5230\u5bf9\u5e94\u7684 MediaSession <sup>27<\/sup>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5ba2\u6237\u7aef\u901a\u5e38\u901a\u8fc7 SessionToken(context, ComponentName) \u6765\u83b7\u53d6\u8fd9\u4e2a\u4ee4\u724c\uff0c\u5176\u4e2d ComponentName \u6307\u5411\u6258\u7ba1 MediaSession \u7684 MediaSessionService <sup>5<\/sup>\u3002\u8fd9\u4e2a\u4ee4\u724c\u673a\u5236\u786e\u4fdd\u4e86\u901a\u4fe1\u7684\u5b89\u5168\u6027\u548c\u660e\u786e\u6027\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"45_%E5%90%91%E5%90%8E%E5%85%BC%E5%AE%B9%E6%80%A7\"><\/span><strong>4.5 \u5411\u540e\u517c\u5bb9\u6027<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u4e86\u786e\u4fdd\u5e73\u6ed1\u7684\u751f\u6001\u7cfb\u7edf\u8fc7\u6e21\uff0cMedia3 \u7684 MediaSession \u5728\u5185\u90e8\u5de7\u5999\u5730\u521b\u5efa\u5e76\u7ba1\u7406\u4e86\u4e00\u4e2a\u65e7\u7248\u7684 android.support.v4.media.session.MediaSessionCompat \u5b9e\u4f8b <sup>30<\/sup>\u3002\u8fd9\u4e2a\u5185\u90e8\u7684<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">MediaSessionCompat \u8d1f\u8d23\u5904\u7406\u6765\u81ea\u4f7f\u7528\u65e7\u7248 API\uff08\u5982 MediaControllerCompat\uff09\u7684\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u548c\u547d\u4ee4\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u610f\u5473\u7740\uff0c\u5f53\u4e00\u4e2a\u5e94\u7528\u4ece\u65e7\u7248\u5a92\u4f53 API \u8fc1\u79fb\u5230 Media3 \u540e\uff0c\u5b83\u4ecd\u7136\u53ef\u4ee5\u4e0e\u5c1a\u672a\u5347\u7ea7\u7684\u7cfb\u7edf\u7ec4\u4ef6\u6216\u5176\u4ed6\u5e94\u7528\u65e0\u7f1d\u534f\u4f5c\u3002MediaSession \u5728\u8fd9\u91cc\u626e\u6f14\u4e86\u4e00\u4e2a\u5173\u952e\u7684\u201c\u9002\u914d\u5668\u201d\u6216\u201c\u5916\u89c2\u201d\u89d2\u8272\uff1a\u5b83\u5bf9\u5185\u4f7f\u7528\u73b0\u4ee3\u7684 Player \u63a5\u53e3\uff0c\u5bf9\u5916\u5219\u5448\u73b0\u51fa\u4e00\u4e2a\u7edf\u4e00\u4e14\u517c\u5bb9\u65e7\u7248\u7684\u6807\u51c6\u63a5\u53e3\u3002\u8fd9\u79cd\u8bbe\u8ba1\u662f Media3 \u80fd\u591f\u88ab\u5e7f\u6cdb\u91c7\u7528\u800c\u4e0d\u4f1a\u5272\u88c2\u751f\u6001\u7cfb\u7edf\u7684\u5173\u952e\u6240\u5728\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E7%AC%AC_5_%E8%8A%82%EF%BC%9A%E5%AE%A2%E6%88%B7%E7%AB%AF%E6%B6%88%E8%B4%B9%EF%BC%9AMediaController_%E4%B8%8E%E7%B3%BB%E7%BB%9F%E6%9C%8D%E5%8A%A1\"><\/span><strong>\u7b2c 5 \u8282\uff1a\u5ba2\u6237\u7aef\u6d88\u8d39\uff1aMediaController \u4e0e\u7cfb\u7edf\u670d\u52a1<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5143\u6570\u636e\u5728\u5e94\u7528\u5185\u90e8\u7ecf\u8fc7\u521b\u5efa\u3001\u7ba1\u7406\u548c\u53d1\u5e03\u540e\uff0c\u5176\u65c5\u7a0b\u7684\u4e0b\u4e00\u7ad9\u662f\u88ab\u5404\u79cd\u5ba2\u6237\u7aef\u6d88\u8d39\u3002\u8fd9\u4e9b\u5ba2\u6237\u7aef\u53ef\u80fd\u662f\u5e94\u7528\u81ea\u8eab\u7684 UI\u3001\u5176\u4ed6\u7b2c\u4e09\u65b9\u5e94\u7528\uff0c\u6216\u8005\u66f4\u91cd\u8981\u7684\u662f\uff0cAndroid \u7cfb\u7edf\u670d\u52a1\u672c\u8eab\u3002\u6240\u6709\u5ba2\u6237\u7aef\u90fd\u9075\u5faa\u4e00\u4e2a\u7edf\u4e00\u7684\u6a21\u5f0f\uff1a\u5b83\u4eec\u4ece\u4e0d\u76f4\u63a5\u4e0e Player \u4ea4\u4e92\uff0c\u800c\u662f\u901a\u8fc7 MediaController \u4e0e\u5e94\u7528\u7684 MediaSession \u901a\u4fe1 <sup>1<\/sup>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"51_%E7%B3%BB%E7%BB%9F%E7%BA%A7%E5%8F%91%E7%8E%B0%E6%9C%BA%E5%88%B6%EF%BC%9AMediaSessionManager\"><\/span><strong>5.1 \u7cfb\u7edf\u7ea7\u53d1\u73b0\u673a\u5236\uff1aMediaSessionManager<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Android \u7cfb\u7edf\u5982\u4f55\u77e5\u9053\u54ea\u4e2a\u5e94\u7528\u6b63\u5728\u64ad\u653e\u5a92\u4f53\uff1f\u7b54\u6848\u662f android.media.session.MediaSessionManager\u3002\u8fd9\u662f\u4e00\u4e2a\u7cfb\u7edf\u7ea7\u670d\u52a1\uff0c\u5b83\u7ef4\u62a4\u7740\u4e00\u4e2a\u5f53\u524d\u8bbe\u5907\u4e0a\u6240\u6709\u6d3b\u52a8 MediaSession \u7684\u5217\u8868 <sup>31<\/sup>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5177\u6709\u7279\u6b8a\u6743\u9650\uff08\u5982 MEDIA_CONTENT_CONTROL\uff09\u6216\u4f5c\u4e3a\u5df2\u542f\u7528\u7684\u901a\u77e5\u76d1\u542c\u5668 (NotificationListenerService) \u7684\u7cfb\u7edf\u670d\u52a1\uff0c\u53ef\u4ee5\u5411 MediaSessionManager \u67e5\u8be2\u8fd9\u4e2a\u6d3b\u52a8\u4f1a\u8bdd\u5217\u8868 <sup>33<\/sup>\u3002\u8fd9\u5c31\u662f\u7cfb\u7edf\u5a92\u4f53\u63a7\u4ef6\uff08\u901a\u77e5\u680f\u548c\u9501\u5c4f\uff09\u3001\u84dd\u7259\u670d\u52a1\u4ee5\u53ca Android Auto \u7b49\u7ec4\u4ef6\u53d1\u73b0\u5e76\u8fde\u63a5\u5230\u5f53\u524d\u64ad\u653e\u5a92\u4f53\u5e94\u7528\u7684\u6838\u5fc3\u673a\u5236\u3002\u5f53\u4e00\u4e2a\u5e94\u7528\u7684<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">MediaSession \u53d8\u4e3a\u6d3b\u52a8\u72b6\u6001\u65f6\uff0cMediaSessionManager \u4f1a\u901a\u77e5\u8fd9\u4e9b\u7cfb\u7edf\u670d\u52a1\uff0c\u5b83\u4eec\u4fbf\u53ef\u4ee5\u83b7\u53d6\u5230\u8be5\u4f1a\u8bdd\u7684 SessionToken\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"52_%E5%88%9B%E5%BB%BA_MediaController\"><\/span><strong>5.2 \u521b\u5efa MediaController<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u65e6\u5ba2\u6237\u7aef\u83b7\u5f97\u4e86 SessionToken\uff0c\u5b83\u5c31\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a MediaController \u6765\u4e0e MediaSession \u5efa\u7acb\u8fde\u63a5\u3002\u7531\u4e8e\u8fde\u63a5\u5230\u540e\u53f0\u670d\u52a1\u662f\u4e00\u4e2a\u5f02\u6b65\u8fc7\u7a0b\uff0cMedia3 \u63d0\u4f9b\u4e86 MediaController.Builder(context, sessionToken).buildAsync() \u65b9\u6cd5\uff0c\u5b83\u8fd4\u56de\u4e00\u4e2a ListenableFuture&lt;MediaController&gt;\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0b\u4ee3\u7801\u5c55\u793a\u4e86\u5ba2\u6237\u7aef\uff08\u4f8b\u5982\uff0c\u4e00\u4e2a UI Activity\uff09\u5982\u4f55\u521b\u5efa\u5e76\u8fde\u63a5 MediaController\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import androidx.media3.session.MediaController\nimport androidx.media3.session.SessionToken\nimport android.content.ComponentName\nimport com.google.common.util.concurrent.ListenableFuture\nimport com.google.common.util.concurrent.MoreExecutors\n\n\/\/... \u5728 Activity \u6216 Fragment \u4e2d\n\nprivate var controllerFuture: ListenableFuture&lt;MediaController>? = null\nprivate var mediaController: MediaController? = null\n\noverride fun onStart() {\n\u00a0 \u00a0 super.onStart()\n\u00a0 \u00a0 \/\/ 1. \u521b\u5efa\u6307\u5411 MediaSessionService \u7684 SessionToken\n\u00a0 \u00a0 val sessionToken = SessionToken(this, ComponentName(this, PlaybackService::class.java))\n\u00a0 \u00a0\n\u00a0 \u00a0 \/\/ 2. \u5f02\u6b65\u6784\u5efa MediaController\n\u00a0 \u00a0 controllerFuture = MediaController.Builder(this, sessionToken).buildAsync()\n\u00a0 \u00a0\n\u00a0 \u00a0 \/\/ 3. \u6dfb\u52a0\u76d1\u542c\u5668\u4ee5\u5728\u8fde\u63a5\u6210\u529f\u65f6\u83b7\u53d6 MediaController \u5b9e\u4f8b\n\u00a0 \u00a0 controllerFuture?.addListener(\n\u00a0 \u00a0 \u00a0 \u00a0 {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u8fde\u63a5\u6210\u529f\u540e\uff0c\u53ef\u4ee5\u5b89\u5168\u5730\u83b7\u53d6 MediaController\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 mediaController = controllerFuture?.get()\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u5c06\u63a7\u5236\u5668\u9644\u52a0\u5230 UI \u7ec4\u4ef6\uff0c\u5982 PlayerView\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ playerView.player = mediaController\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u6ce8\u518c\u76d1\u542c\u5668\u4ee5\u63a5\u6536\u5143\u6570\u636e\u7b49\u72b6\u6001\u66f4\u65b0\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 mediaController?.addListener(clientPlayerListener)\n\u00a0 \u00a0 \u00a0 \u00a0 },\n\u00a0 \u00a0 \u00a0 \u00a0 MoreExecutors.directExecutor()\n\u00a0 \u00a0 )\n}\n\noverride fun onStop() {\n\u00a0 \u00a0 super.onStop()\n\u00a0 \u00a0 \/\/ 4. \u91ca\u653e MediaController\n\u00a0 \u00a0 controllerFuture?.let {\n\u00a0 \u00a0 \u00a0 \u00a0 MediaController.releaseFuture(it)\n\u00a0 \u00a0 }\n\u00a0 \u00a0 mediaController?.removeListener(clientPlayerListener)\n\u00a0 \u00a0 mediaController = null\n}\n\nprivate val clientPlayerListener = object : Player.Listener {\n\u00a0 \u00a0 override fun onMediaMetadataChanged(mediaMetadata: MediaMetadata) {\n\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u5ba2\u6237\u7aef UI \u5728\u8fd9\u91cc\u63a5\u6536\u5230\u5143\u6570\u636e\u66f4\u65b0\n\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u66f4\u65b0 UI...\n\u00a0 \u00a0 }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"53_MediaController_%E4%BD%9C%E4%B8%BA_Player\"><\/span><strong>5.3 MediaController \u4f5c\u4e3a Player<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Media3 \u7684\u4e00\u4e2a\u4f18\u96c5\u8bbe\u8ba1\u662f MediaController \u63a5\u53e3\u76f4\u63a5\u5b9e\u73b0\u4e86 Player \u63a5\u53e3 <sup>2<\/sup>\u3002\u8fd9\u610f\u5473\u7740\u5ba2\u6237\u7aef\u4ee3\u7801\u53ef\u4ee5\u4f7f\u7528\u5b8c\u5168\u76f8\u540c\u7684\u65b9\u6cd5\u96c6\u6765\u4e0e\u8fdc\u7a0b\u64ad\u653e\u5668\uff08\u901a\u8fc7<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">MediaController\uff09\u548c\u672c\u5730\u64ad\u653e\u5668\uff08\u5982 ExoPlayer \u5b9e\u4f8b\uff09\u8fdb\u884c\u4ea4\u4e92\u3002\u4f8b\u5982\uff0c\u8c03\u7528 mediaController.play() \u4f1a\u5c06\u64ad\u653e\u547d\u4ee4\u53d1\u9001\u5230\u8fde\u63a5\u7684 MediaSession\uff0c\u540e\u8005\u518d\u5c06\u547d\u4ee4\u59d4\u6258\u7ed9\u5176\u5185\u90e8\u7684 Player\u3002\u8fd9\u79cd\u8bbe\u8ba1\u6781\u5927\u5730\u7edf\u4e00\u4e86 API\uff0c\u5e76\u5141\u8bb8 UI \u7ec4\u4ef6\uff08\u5982 PlayerView\uff09\u65e0\u5dee\u522b\u5730\u63a5\u53d7 ExoPlayer \u6216 MediaController \u4f5c\u4e3a\u5176\u64ad\u653e\u5668\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"54_%E5%9C%A8%E5%AE%A2%E6%88%B7%E7%AB%AF%E7%9B%91%E5%90%AC%E5%85%83%E6%95%B0%E6%8D%AE\"><\/span><strong>5.4 \u5728\u5ba2\u6237\u7aef\u76d1\u542c\u5143\u6570\u636e<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u4e0a\u8ff0\u4ee3\u7801\u6240\u793a\uff0c\u5ba2\u6237\u7aef\u901a\u8fc7\u5728 MediaController \u5b9e\u4f8b\u4e0a\u6ce8\u518c Player.Listener \u6765\u63a5\u6536\u72b6\u6001\u66f4\u65b0\u3002\u6570\u636e\u6d41\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5e94\u7528\u5185\u90e8\u7684 Player \u5143\u6570\u636e\u66f4\u65b0\u3002<\/li>\n\n\n\n<li>MediaSession \u76d1\u542c\u5230\u53d8\u5316\uff0c\u66f4\u65b0\u81ea\u8eab\u72b6\u6001\u3002<\/li>\n\n\n\n<li>MediaSession \u5c06\u66f4\u65b0\u63a8\u9001\u7ed9\u6240\u6709\u8fde\u63a5\u7684 MediaController\u3002<\/li>\n\n\n\n<li>\u6bcf\u4e2a MediaController \u89e6\u53d1\u5176\u6ce8\u518c\u7684 Player.Listener \u7684 onMediaMetadataChanged \u56de\u8c03 <sup>5<\/sup>\u3002<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u6837\uff0c\u5143\u6570\u636e\u5c31\u4ece\u670d\u52a1\u7aef\u7684 Player \u53ef\u9760\u5730\u4f20\u9012\u5230\u4e86\u5ba2\u6237\u7aef\u7684 UI\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9700\u8981\u5f3a\u8c03\u7684\u662f\uff0c\u8fd9\u4e2a\u901a\u4fe1\u8fc7\u7a0b\u53d7\u5230 Android \u6743\u9650\u6a21\u578b\u7684\u4e25\u683c\u63a7\u5236\u3002\u4e00\u4e2a\u968f\u673a\u5e94\u7528\u65e0\u6cd5\u968f\u610f\u521b\u5efa MediaController \u6765\u63a7\u5236\u5176\u4ed6\u5e94\u7528\u7684 MediaSession\u3002\u5b83\u8981\u4e48\u9700\u8981\u4ece\u5a92\u4f53\u5e94\u7528\u90a3\u91cc\u660e\u786e\u5730\u83b7\u5f97 SessionToken\uff0c\u8981\u4e48\u9700\u8981\u6301\u6709\u7cfb\u7edf\u7ea7\u7684 MEDIA_CONTENT_CONTROL \u6743\u9650\u624d\u80fd\u901a\u8fc7 MediaSessionManager \u8fdb\u884c\u53d1\u73b0 <sup>33<\/sup>\u3002\u8fd9\u786e\u4fdd\u4e86\u53ea\u6709\u53d7\u4fe1\u4efb\u7684\u7cfb\u7edf\u7ec4\u4ef6\u548c\u6388\u6743\u5e94\u7528\u624d\u80fd\u8bbf\u95ee\u548c\u63a7\u5236\u7528\u6237\u7684\u5a92\u4f53\u64ad\u653e\uff0c\u4fdd\u969c\u4e86\u7cfb\u7edf\u7684\u5b89\u5168\u6027\u548c\u7528\u6237\u7684\u9690\u79c1\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E7%AC%AC_6_%E8%8A%82%EF%BC%9A%E6%9C%80%E7%BB%88%E7%9B%AE%E7%9A%84%E5%9C%B0%EF%BC%9A%E9%80%9A%E8%BF%87_AVRCP_%E4%BC%A0%E8%BE%93%E5%88%B0%E8%BD%A6%E8%BD%BD%E8%93%9D%E7%89%99\"><\/span><strong>\u7b2c 6 \u8282\uff1a\u6700\u7ec8\u76ee\u7684\u5730\uff1a\u901a\u8fc7 AVRCP \u4f20\u8f93\u5230\u8f66\u8f7d\u84dd\u7259<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5143\u6570\u636e\u65c5\u7a0b\u7684\u6700\u540e\u4e00\u7ad9\uff0c\u4e5f\u662f\u6700\u5173\u952e\u7684\u4e00\u73af\uff0c\u662f\u5c06\u5176\u4ece Android \u624b\u673a\u4f20\u8f93\u5230\u5916\u90e8\u8bbe\u5907\uff0c\u5982\u8f66\u8f7d\u97f3\u54cd\u7684\u663e\u793a\u5c4f\u4e0a\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u5b8c\u5168\u7531 Android \u64cd\u4f5c\u7cfb\u7edf\u5728\u5e95\u5c42\u5904\u7406\uff0c\u5e94\u7528\u5f00\u53d1\u8005\u65e0\u9700\u4e5f\u65e0\u6cd5\u76f4\u63a5\u5e72\u9884\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"61_Android_%E8%93%9D%E7%89%99%E6%A0%88%E6%9E%B6%E6%9E%84%E6%A6%82%E8%A7%88\"><\/span><strong>6.1 Android \u84dd\u7259\u6808\u67b6\u6784\u6982\u89c8<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5a92\u4f53\u5e94\u7528\u5f00\u53d1\u8005\u7f16\u5199\u7684\u4ee3\u7801\u4f4d\u4e8e\u5e94\u7528\u5c42\u3002\u5f53\u5143\u6570\u636e\u901a\u8fc7 MediaSession \u53d1\u5e03\u540e\uff0c\u5b83\u5c31\u88ab\u4ea4\u7ed9\u4e86 Android \u7cfb\u7edf\u3002\u7cfb\u7edf\u7684\u84dd\u7259\u670d\u52a1\uff08\u901a\u5e38\u4f5c\u4e3a com.android.bluetooth \u5305\u7684\u4e00\u90e8\u5206\u8fd0\u884c\uff09\u4f1a\u63a5\u7ba1\u540e\u7eed\u7684\u4f20\u8f93\u5de5\u4f5c\u3002\u8be5\u670d\u52a1\u8d1f\u8d23\u5b9e\u73b0\u84dd\u7259\u534f\u8bae\u6808\uff0c\u5305\u62ec A2DP\uff08\u9ad8\u7ea7\u97f3\u9891\u5206\u53d1\u914d\u7f6e\u6587\u4ef6\uff0c\u7528\u4e8e\u4f20\u8f93\u97f3\u9891\u6d41\uff09\u548c AVRCP\uff08\u97f3\/\u89c6\u9891\u8fdc\u7a0b\u63a7\u5236\u914d\u7f6e\u6587\u4ef6\uff0c\u7528\u4e8e\u4f20\u8f93\u5143\u6570\u636e\u548c\u63a7\u5236\u547d\u4ee4\uff09<sup>36<\/sup>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5e94\u7528\u5f00\u53d1\u8005\u4e0e\u84dd\u7259\u534f\u8bae\u4e4b\u95f4\u7684\u4ea4\u4e92\u662f\u5b8c\u5168\u62bd\u8c61\u7684\u3002Media3 \u7684 MediaSession \u662f\u5e94\u7528\u9700\u8981\u5173\u5fc3\u7684\u552f\u4e00\u63a5\u53e3\u3002\u53ea\u8981\u5e94\u7528\u6b63\u786e\u5730\u586b\u5145\u548c\u7ef4\u62a4\u5176 MediaSession \u7684\u72b6\u6001\uff0c\u7cfb\u7edf\u5c31\u4f1a\u8d1f\u8d23\u5c06\u8fd9\u4e9b\u4fe1\u606f\u8f6c\u6362\u4e3a\u76f8\u5e94\u7684 AVRCP \u547d\u4ee4\u5e76\u53d1\u9001\u51fa\u53bb\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"62_%E8%BF%BD%E8%B8%AA%E6%95%B0%E6%8D%AE%E5%88%B0%E8%93%9D%E7%89%99%E6%9C%8D%E5%8A%A1%E7%9A%84%E8%B7%AF%E5%BE%84\"><\/span><strong>6.2 \u8ffd\u8e2a\u6570\u636e\u5230\u84dd\u7259\u670d\u52a1\u7684\u8def\u5f84<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5143\u6570\u636e\u4ece MediaSession \u5230\u84dd\u7259\u8bbe\u5907\u7684\u7cbe\u786e\u8def\u5f84\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4f1a\u8bdd\u53d1\u73b0:<\/strong> \u7cfb\u7edf\u7684\u84dd\u7259\u670d\u52a1\u5728\u542f\u52a8\u65f6\uff0c\u4f1a\u5411 MediaSessionManager \u6ce8\u518c\u4e00\u4e2a\u76d1\u542c\u5668\uff0c\u4ee5\u76d1\u63a7\u6d3b\u52a8\u5a92\u4f53\u4f1a\u8bdd\u7684\u53d8\u5316 <sup>32<\/sup>\u3002<\/li>\n\n\n\n<li><strong>\u63a7\u5236\u5668\u521b\u5efa:<\/strong> \u5f53\u7528\u6237\u7684\u5a92\u4f53\u5e94\u7528\u5f00\u59cb\u64ad\u653e\u65f6\uff0c\u5176 MediaSession \u53d8\u4e3a\u6d3b\u52a8\u72b6\u6001\u3002\u84dd\u7259\u670d\u52a1\u4f1a\u6536\u5230\u901a\u77e5\uff0c\u5e76\u83b7\u53d6\u5230\u8be5\u4f1a\u8bdd\u7684 SessionToken\u3002<\/li>\n\n\n\n<li><strong>\u8fde\u63a5\u4e0e\u76d1\u542c:<\/strong> \u84dd\u7259\u670d\u52a1\u4f7f\u7528\u8fd9\u4e2a SessionToken \u521b\u5efa\u4e00\u4e2a MediaController\uff0c\u8fde\u63a5\u5230\u5e94\u7528\u7684 MediaSession\u3002\u540c\u65f6\uff0c\u5b83\u4f1a\u5728\u8fd9\u4e2a MediaController \u4e0a\u6ce8\u518c\u4e00\u4e2a Player.Listener <sup>39<\/sup>\u3002<\/li>\n\n\n\n<li><strong>\u63a5\u6536\u5143\u6570\u636e:<\/strong> \u5f53\u5e94\u7528\u7684 Player \u5143\u6570\u636e\u53d1\u751f\u53d8\u5316\u65f6\uff08\u4f8b\u5982\u5207\u6362\u6b4c\u66f2\uff09\uff0cMediaSession \u4f1a\u5c06\u66f4\u65b0\u63a8\u9001\u5230\u84dd\u7259\u670d\u52a1\u7684 MediaController\uff0c\u89e6\u53d1\u5176 onMediaMetadataChanged \u56de\u8c03\u3002\u81f3\u6b64\uff0c\u6700\u65b0\u7684 MediaMetadata \u5bf9\u8c61\u5df2\u7ecf\u5230\u8fbe\u4e86\u84dd\u7259\u670d\u52a1\u8fdb\u7a0b\u4e2d\u3002<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"63_AVRCP_%E5%8D%8F%E8%AE%AE%E7%AE%80%E4%BB%8B\"><\/span><strong>6.3 AVRCP \u534f\u8bae\u7b80\u4ecb<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">AVRCP \u662f\u4e00\u4e2a\u6807\u51c6\u5316\u7684\u84dd\u7259\u534f\u8bae\uff0c\u5b83\u5b9a\u4e49\u4e86\u63a7\u5236\u5668\uff08Controller, CT\uff09\u548c\u76ee\u6807\uff08Target, TG\uff09\u4e4b\u95f4\u7684\u901a\u4fe1\u89c4\u5219\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u89d2\u8272:<\/strong> \u5728\u624b\u673a\u4e0e\u8f66\u8f7d\u97f3\u54cd\u7684\u573a\u666f\u4e2d\uff0c\u624b\u673a\u626e\u6f14 <strong>AVRCP \u63a7\u5236\u5668 (CT)<\/strong> \u7684\u89d2\u8272\uff0c\u800c\u8f66\u8f7d\u97f3\u54cd\u5219\u662f <strong>AVRCP \u76ee\u6807 (TG)<\/strong>\u3002<\/li>\n\n\n\n<li><strong>\u5173\u952e\u547d\u4ee4:<\/strong> \u5f53\u8f66\u8f7d\u97f3\u54cd\uff08TG\uff09\u60f3\u8981\u663e\u793a\u5f53\u524d\u64ad\u653e\u7684\u6b4c\u66f2\u4fe1\u606f\u65f6\uff0c\u5b83\u4f1a\u5411\u624b\u673a\uff08CT\uff09\u53d1\u9001\u4e00\u4e2a GetElementAttributes \u547d\u4ee4\u3002\u8fd9\u4e2a\u547d\u4ee4\u8bf7\u6c42\u83b7\u53d6\u5f53\u524d\u64ad\u653e\u8f68\u9053\u7684\u4e00\u7cfb\u5217\u5c5e\u6027\uff08\u5982\u6807\u9898\u3001\u827a\u672f\u5bb6\u7b49\uff09<sup>40<\/sup>\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"64_AOSP_%E4%BB%A3%E7%A0%81%E5%88%86%E6%9E%90%EF%BC%9AMediaMetadata_%E4%B8%8E_AVRCP_%E7%9A%84%E6%A1%A5%E6%A2%81\"><\/span><strong>6.4 AOSP \u4ee3\u7801\u5206\u6790\uff1aMediaMetadata \u4e0e AVRCP \u7684\u6865\u6881<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7\u5206\u6790 Android \u5f00\u6e90\u9879\u76ee (AOSP) \u7684\u6e90\u7801\uff0c\u6211\u4eec\u53ef\u4ee5\u627e\u5230 MediaMetadata \u88ab\u8f6c\u6362\u4e3a AVRCP \u54cd\u5e94\u7684\u5177\u4f53\u5b9e\u73b0\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u7cfb\u7edf\u670d\u52a1\u7684\u89d2\u8272:<\/strong> \u5728 AOSP \u7684\u84dd\u7259\u5e94\u7528\u4e2d\uff0c\u7c7b\u4f3c A2dpMediaBrowserService.java \u6216 AddressedMediaPlayer.java \u8fd9\u6837\u7684\u7c7b\u626e\u6f14\u4e86\u6865\u6881\u7684\u89d2\u8272\u3002\u4f8b\u5982\uff0c\u5728 A2dpMediaBrowserService \u7684\u5b9e\u73b0\u4e2d\uff0c\u53ef\u4ee5\u770b\u5230\u5b83\u521b\u5efa\u4e86\u81ea\u5df1\u7684 MediaSession \u6765\u4ee3\u8868\u84dd\u7259\u97f3\u9891\u6e90\u7684\u72b6\u6001\u3002\u5b83\u4f1a\u76d1\u542c\u6765\u81ea\u5e95\u5c42\u84dd\u7259\u6808\u7684 BluetoothAvrcpController.ACTION_TRACK_EVENT \u5e7f\u64ad\uff0c\u8fd9\u4e2a\u5e7f\u64ad\u7684 Intent \u4e2d\u5c31\u5305\u542b\u4e86\u4ece\u8fdc\u7aef\u8bbe\u5907\uff08\u5982\u624b\u673a\uff09\u63a5\u6536\u5230\u7684 PlaybackState \u548c MediaMetadata\u3002\u7136\u540e\uff0c\u670d\u52a1\u4f1a\u8c03\u7528 mSession.setMetadata() \u548c mSession.setPlaybackState() \u6765\u66f4\u65b0\u8fd9\u4e2a\u4ee3\u8868\u84dd\u7259\u6e90\u7684\u4f1a\u8bdd <sup>39<\/sup>\u3002\u53cd\u8fc7\u6765\uff0c\u5f53\u7cfb\u7edf\u4e2d\u7684\u5176\u4ed6\u5e94\u7528\uff08\u5982\u8f66\u8f7d\u542f\u52a8\u5668\uff09\u60f3\u8981\u63a7\u5236\u84dd\u7259\u64ad\u653e\u65f6\uff0c\u5b83\u4eec\u4f1a\u8fde\u63a5\u5230\u8fd9\u4e2a<br>A2dpMediaBrowserService \u7684 MediaSession\uff0c\u53d1\u9001\u547d\u4ee4\uff0c\u670d\u52a1\u518d\u5c06\u8fd9\u4e9b\u547d\u4ee4\u8f6c\u6362\u4e3a AVRCP \u547d\u4ee4\u53d1\u56de\u7ed9\u624b\u673a\u3002<\/li>\n\n\n\n<li><strong>\u8f6c\u6362\u5c42:<\/strong> \u5f53\u624b\u673a\u7684\u84dd\u7259\u670d\u52a1\u6536\u5230\u6765\u81ea\u8f66\u8f7d\u97f3\u54cd\u7684 GetElementAttributes \u8bf7\u6c42\u65f6\uff0c\u5b83\u4f1a\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u901a\u8fc7\u5176\u6301\u6709\u7684 MediaController\uff0c\u8c03\u7528 getMediaMetadata() \u65b9\u6cd5\uff0c\u83b7\u53d6\u5230\u5f53\u524d\u5a92\u4f53\u5e94\u7528\u63d0\u4f9b\u7684\u6700\u65b0 MediaMetadata \u5bf9\u8c61\u3002<\/li>\n\n\n\n<li>\u89e3\u6790\u8fd9\u4e2a MediaMetadata \u5bf9\u8c61\uff0c\u63d0\u53d6\u51fa title\u3001artist\u3001albumTitle \u7b49\u5b57\u6bb5\u3002<\/li>\n\n\n\n<li>\u6839\u636e AVRCP \u89c4\u8303\uff0c\u5c06\u8fd9\u4e9b\u5b57\u7b26\u4e32\u548c\u5176\u4ed6\u6570\u636e\u6253\u5305\u6210\u5bf9 GetElementAttributes \u547d\u4ee4\u7684\u54cd\u5e94\u3002<\/li>\n\n\n\n<li>\u901a\u8fc7\u84dd\u7259\u5806\u6808\u5c06\u8fd9\u4e2a\u54cd\u5e94\u53d1\u9001\u56de\u8f66\u8f7d\u97f3\u54cd\u3002<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E8%A1%A8_61%EF%BC%9AMediaMetadata_%E5%88%B0_AVRCP_16_%E5%B1%9E%E6%80%A7%E7%9A%84%E6%98%A0%E5%B0%84\"><\/span><strong>\u8868 6.1\uff1aMediaMetadata \u5230 AVRCP 1.6 \u5c5e\u6027\u7684\u6620\u5c04<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u8868\u63ed\u793a\u4e86 MediaMetadata \u5b57\u6bb5\u4e0e AVRCP \u89c4\u8303\u4e2d\u5b9a\u4e49\u7684\u5c5e\u6027\u4e4b\u95f4\u7684\u76f4\u63a5\u6620\u5c04\u5173\u7cfb\u3002\u8fd9\u5bf9\u4e8e\u8c03\u8bd5\u5143\u6570\u636e\u663e\u793a\u95ee\u9898\u81f3\u5173\u91cd\u8981\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>MediaMetadata \u5b57\u6bb5\/\u952e<\/td><td>AVRCP \u5c5e\u6027 ID<\/td><td>AVRCP \u5c5e\u6027\u540d\u79f0<\/td><\/tr><tr><td>mediaMetadata.title<\/td><td>0x01<\/td><td>Title of media<\/td><\/tr><tr><td>mediaMetadata.artist<\/td><td>0x02<\/td><td>Name of artist<\/td><\/tr><tr><td>mediaMetadata.albumTitle<\/td><td>0x03<\/td><td>Name of album<\/td><\/tr><tr><td>mediaMetadata.trackNumber<\/td><td>0x04<\/td><td>Track Number<\/td><\/tr><tr><td>mediaMetadata.totalTrackCount<\/td><td>0x05<\/td><td>Total number of tracks<\/td><\/tr><tr><td>mediaMetadata.genre<\/td><td>0x06<\/td><td>Genre<\/td><\/tr><tr><td>mediaMetadata.duration<\/td><td>0x07<\/td><td>Playing time (in ms)<\/td><\/tr><tr><td>mediaMetadata.artworkUri (\u6570\u636e)<\/td><td>0x08<\/td><td>Cover Art<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u5f00\u53d1\u8005\u53d1\u73b0\u4e13\u8f91\u540d\u6ca1\u6709\u5728\u8f66\u8f7d\u5c4f\u5e55\u4e0a\u663e\u793a\uff0c\u901a\u8fc7\u67e5\u9605\u6b64\u8868\uff0c\u53ef\u4ee5\u8fc5\u901f\u5b9a\u4f4d\u95ee\u9898\uff1a\u662f\u5e94\u7528\u6ca1\u6709\u8c03\u7528 setAlbumTitle()\uff0c\u8fd8\u662f\u8f66\u8f7d\u97f3\u54cd\u7684 AVRCP \u5b9e\u73b0\u4e0d\u652f\u6301\u663e\u793a Album Name \u5c5e\u6027\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"65_%E5%B8%B8%E8%A7%81%E9%99%B7%E9%98%B1%E4%B8%8E%E8%B0%83%E8%AF%95\"><\/span><strong>6.5 \u5e38\u89c1\u9677\u9631\u4e0e\u8c03\u8bd5<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5143\u6570\u636e\u4e0d\u66f4\u65b0:<\/strong> \u5728\u65e7\u7248\u4ee3\u7801\u4e2d\uff0c\u8fd9\u901a\u5e38\u662f\u56e0\u4e3a\u5728\u66f4\u65b0\u5143\u6570\u636e\u540e\u5fd8\u8bb0\u8bbe\u7f6e\u65b0\u7684 PlaybackState <sup>42<\/sup>\u3002\u5728\u73b0\u4ee3\u5e94\u7528\u4e2d\uff0c\u8fd9\u66f4\u53ef\u80fd\u4e0e\u7279\u5b9a\u8f66\u8f7d\u97f3\u54cd\u7684 AVRCP \u5b9e\u73b0\u6709\u5173\uff0c\u6216\u8005\u624b\u673a\u4e0e\u6c7d\u8f66\u534f\u5546\u7684 AVRCP \u7248\u672c\u8f83\u4f4e\uff08\u5982 1.4 \u7248\u672c\uff0c\u5176\u5143\u6570\u636e\u652f\u6301\u6709\u9650\uff09<sup>43<\/sup>\u3002<\/li>\n\n\n\n<li><strong>\u84dd\u7259\u65ad\u5f00\u6216\u5d29\u6e83:<\/strong> \u8fd9\u662f\u4e00\u4e2a\u201c\u6cc4\u6f0f\u7684\u62bd\u8c61\u201d\u95ee\u9898\u7684\u5178\u578b\u4f8b\u5b50\u3002\u5c3d\u7ba1 Media3 API \u672c\u8eab\u6ca1\u6709\u5927\u5c0f\u9650\u5236\uff0c\u4f46\u5e95\u5c42\u7684 Binder \u4e8b\u52a1\u548c\u84dd\u7259\u534f\u8bae\u6808\u6709\u3002\u5728 MediaMetadata \u4e2d\u4f20\u9012\u975e\u5e38\u5927\u7684\u6570\u636e\uff0c\u5c24\u5176\u662f\u672a\u7ecf\u538b\u7f29\u7684 Bitmap \u4f5c\u4e3a\u5c01\u9762\u56fe\u6216\u6781\u957f\u7684\u5b57\u7b26\u4e32\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4 TransactionTooLargeException\uff0c\u6216\u8005\u76f4\u63a5\u4f7f\u67d0\u4e9b\u624b\u673a\u7684\u84dd\u7259\u670d\u52a1\u5d29\u6e83\uff0c\u5bfc\u81f4\u8fde\u63a5\u4e2d\u65ad <sup>9<\/sup>\u3002\u56e0\u6b64\uff0c\u6700\u4f73\u5b9e\u8df5\u662f\u59cb\u7ec8\u4f7f\u7528<br>setArtworkUri\uff0c\u5e76\u5bf9\u5b57\u7b26\u4e32\u957f\u5ea6\u8fdb\u884c\u5408\u7406\u63a7\u5236\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u7ec8\uff0c\u5f00\u53d1\u8005\u9700\u8981\u8ba4\u8bc6\u5230\uff0c\u5c3d\u7ba1\u4ed6\u4eec\u4e0e\u84dd\u7259\u534f\u8bae\u5b8c\u5168\u9694\u79bb\uff0c\u4f46\u534f\u8bae\u7684\u7269\u7406\u548c\u7248\u672c\u9650\u5236\u4ecd\u7136\u4f1a\u5f71\u54cd\u6700\u7ec8\u7684\u7528\u6237\u4f53\u9a8c\u3002\u7406\u89e3\u8fd9\u4e00\u70b9\u5bf9\u4e8e\u6709\u6548\u8bca\u65ad\u548c\u89e3\u51b3\u5728\u771f\u5b9e\u4e16\u754c\u8bbe\u5907\u4e0a\u9047\u5230\u7684\u95ee\u9898\u81f3\u5173\u91cd\u8981\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E7%AC%AC_7_%E8%8A%82%EF%BC%9A%E7%BB%93%E8%AE%BA%E4%B8%8E%E6%9C%80%E4%BD%B3%E5%AE%9E%E8%B7%B5\"><\/span><strong>\u7b2c 7 \u8282\uff1a\u7ed3\u8bba\u4e0e\u6700\u4f73\u5b9e\u8df5<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"71_%E5%85%83%E6%95%B0%E6%8D%AE%E4%B9%8B%E6%97%85%E6%80%BB%E7%BB%93\"><\/span><strong>7.1 \u5143\u6570\u636e\u4e4b\u65c5\u603b\u7ed3<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u672c\u62a5\u544a\u8be6\u7ec6\u8ffd\u8e2a\u4e86\u97f3\u9891\u5143\u6570\u636e\u5728 Android Media3 \u6846\u67b6\u4e2d\u7684\u5b8c\u6574\u751f\u547d\u5468\u671f\u3002\u5176\u65c5\u7a0b\u59cb\u4e8e\u5e94\u7528\u5c42\uff0c\u5f00\u53d1\u8005\u901a\u8fc7 MediaMetadata.Builder \u7cbe\u5fc3\u6784\u5efa\u63cf\u8ff0\u6027\u4fe1\u606f\uff0c\u5e76\u5c06\u5176\u9644\u52a0\u5230 MediaItem \u4e0a\u3002\u968f\u540e\uff0cMediaItem \u88ab\u63d0\u4ea4\u7ed9 Player (ExoPlayer)\uff0c\u4f7f\u5176\u6210\u4e3a\u6240\u6709\u64ad\u653e\u72b6\u6001\u7684\u5185\u90e8\u201c\u771f\u7406\u4e4b\u6e90\u201d\u3002Player \u7684\u4efb\u4f55\u72b6\u6001\u53d8\u5316\uff0c\u5305\u62ec\u5143\u6570\u636e\u66f4\u65b0\uff0c\u90fd\u4f1a\u901a\u8fc7 Player.Listener \u63a5\u53e3\u5411\u5916\u5e7f\u64ad\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">MediaSession \u4f5c\u4e3a\u8fd9\u4e00\u673a\u5236\u7684\u5173\u952e\u6d88\u8d39\u8005\u548c\u53d1\u5e03\u8005\uff0c\u5b83\u81ea\u52a8\u76d1\u542c Player \u7684\u72b6\u6001\uff0c\u5e76\u5c06\u8fd9\u4e9b\u72b6\u6001\u4ee5\u6807\u51c6\u5316\u7684 MediaMetadataCompat \u548c PlaybackStateCompat \u683c\u5f0f\u5411\u6574\u4e2a Android \u7cfb\u7edf\u5e7f\u64ad\u3002\u7cfb\u7edf\u7684 MediaSessionManager \u8d1f\u8d23\u53d1\u73b0\u8fd9\u4e9b\u6d3b\u52a8\u7684\u4f1a\u8bdd\uff0c\u5e76\u5141\u8bb8\u6388\u6743\u7684\u7cfb\u7edf\u670d\u52a1\uff08\u5982\u901a\u77e5\u7ba1\u7406\u5668\u548c\u84dd\u7259\u670d\u52a1\uff09\u8fdb\u884c\u8fde\u63a5\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u540e\uff0c\u84dd\u7259\u670d\u52a1\u4f5c\u4e3a MediaSession \u7684\u4e00\u4e2a\u5ba2\u6237\u7aef\uff0c\u901a\u8fc7 MediaController \u63a5\u6536\u5143\u6570\u636e\u66f4\u65b0\u3002\u5b83\u5c06\u63a5\u6536\u5230\u7684 MediaMetadata \u5bf9\u8c61\u4e2d\u7684\u5b57\u6bb5\uff0c\u8f6c\u6362\u4e3a\u84dd\u7259 AVRCP \u534f\u8bae\u6240\u5b9a\u4e49\u7684\u5c5e\u6027\uff0c\u5e76\u54cd\u5e94\u6765\u81ea\u8f66\u8f7d\u97f3\u54cd\u7b49\u5916\u90e8\u8bbe\u5907\u7684 GetElementAttributes \u8bf7\u6c42\uff0c\u4ece\u800c\u5728\u8fdc\u7a0b\u8bbe\u5907\u7684\u5c4f\u5e55\u4e0a\u663e\u793a\u51fa\u6b4c\u66f2\u6807\u9898\u3001\u827a\u672f\u5bb6\u7b49\u4fe1\u606f\u3002\u6574\u4e2a\u8fc7\u7a0b\u4f53\u73b0\u4e86 Media3 \u5f3a\u5927\u7684\u62bd\u8c61\u80fd\u529b\u548c\u81ea\u52a8\u5316\u7684\u72b6\u6001\u7ba1\u7406\uff0c\u5c06\u5f00\u53d1\u8005\u4ece\u590d\u6742\u7684\u5e95\u5c42\u7ec6\u8282\u4e2d\u89e3\u653e\u51fa\u6765\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"72_%E5%BC%80%E5%8F%91%E8%80%85%E8%A1%8C%E5%8A%A8%E5%BB%BA%E8%AE%AE%E6%B8%85%E5%8D%95\"><\/span><strong>7.2 \u5f00\u53d1\u8005\u884c\u52a8\u5efa\u8bae\u6e05\u5355<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u4e86\u6784\u5efa\u5065\u58ee\u3001\u517c\u5bb9\u4e14\u7528\u6237\u4f53\u9a8c\u826f\u597d\u7684\u5a92\u4f53\u5e94\u7528\uff0c\u5f00\u53d1\u8005\u5e94\u9075\u5faa\u4ee5\u4e0b\u6700\u4f73\u5b9e\u8df5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>[\u2713] \u63d0\u4f9b\u4e30\u5bcc\u51c6\u786e\u7684\u5143\u6570\u636e:<\/strong> \u5728\u521b\u5efa\u6bcf\u4e2a MediaItem \u65f6\uff0c\u52a1\u5fc5\u4f7f\u7528 MediaMetadata.Builder \u586b\u5145\u5c3d\u53ef\u80fd\u5b8c\u6574\u548c\u51c6\u786e\u7684\u5143\u6570\u636e\uff0c\u5305\u62ec\u6807\u9898\u3001\u827a\u672f\u5bb6\u3001\u4e13\u8f91\u548c\u5c01\u9762\u56fe URI\u3002\u8fd9\u662f\u4fdd\u8bc1\u5728\u6240\u6709\u5ba2\u6237\u7aef\u4e0a\u83b7\u5f97\u826f\u597d\u663e\u793a\u6548\u679c\u7684\u57fa\u7840\u3002<\/li>\n\n\n\n<li><strong>[\u2713] \u4f18\u5148\u4f7f\u7528 setArtworkUri:<\/strong> \u907f\u514d\u4f7f\u7528 setArtworkData \u5d4c\u5165\u5927\u578b\u4f4d\u56fe\u3002\u5e94\u4f18\u5148\u63d0\u4f9b\u6307\u5411\u5c01\u9762\u56fe\u7684 URI\u3002\u5982\u679c\u5fc5\u987b\u5d4c\u5165\u4f4d\u56fe\uff0c\u8bf7\u5148\u5c06\u5176\u7f29\u653e\u5230\u4e00\u4e2a\u5408\u7406\u7684\u5927\u5c0f\uff08\u4f8b\u5982\uff0c\u4e0d\u8d85\u8fc7 512&#215;512 \u50cf\u7d20\uff09\uff0c\u4ee5\u9632\u6b62\u56e0\u6570\u636e\u8fc7\u5927\u5bfc\u81f4\u84dd\u7259\u5806\u6808\u5d29\u6e83\u6216 Binder \u4e8b\u52a1\u5931\u8d25 <sup>9<\/sup>\u3002<\/li>\n\n\n\n<li><strong>[\u2713] \u4e3a\u540e\u53f0\u64ad\u653e\u5b9e\u73b0 MediaSessionService:<\/strong> \u4efb\u4f55\u9700\u8981\u5728\u540e\u53f0\u64ad\u653e\u97f3\u9891\u7684\u5e94\u7528\u90fd\u5fc5\u987b\u5c06\u5176 Player \u548c MediaSession \u6258\u7ba1\u5728 MediaSessionService \u4e2d\u3002\u8fd9\u80fd\u786e\u4fdd\u5373\u4f7f\u7528\u6237\u79bb\u5f00\u5e94\u7528\u754c\u9762\uff0c\u64ad\u653e\u4e5f\u80fd\u7ee7\u7eed\uff0c\u5e76\u80fd\u88ab\u7cfb\u7edf\u6b63\u786e\u7ba1\u7406 <sup>2<\/sup>\u3002<\/li>\n\n\n\n<li><strong>[\u2713] \u6b63\u786e\u5b9e\u73b0 MediaLibraryService.Callback:<\/strong> \u5982\u679c\u60a8\u7684\u5e94\u7528\u652f\u6301\u5a92\u4f53\u5e93\u6d4f\u89c8\uff08\u5982 Android Auto \u6240\u9700\uff09\u6216\u901a\u8fc7 mediaId \u8fdb\u884c\u64ad\u653e\uff0c\u5fc5\u987b\u6b63\u786e\u5b9e\u73b0 MediaLibraryService.Callback\uff0c\u7279\u522b\u662f onGetRoot \u548c onGetChildren \u65b9\u6cd5\uff0c\u4ee5\u53ca\u7528\u4e8e\u89e3\u6790 mediaId \u7684 onAddMediaItems \u65b9\u6cd5 <sup>12<\/sup>\u3002<\/li>\n\n\n\n<li><strong>[\u2713] \u4f7f\u7528 player.replaceMediaItem() \u66f4\u65b0\u5f53\u524d\u9879:<\/strong> \u5f53\u9700\u8981\u66f4\u65b0\u5f53\u524d\u6b63\u5728\u64ad\u653e\u7684\u5a92\u4f53\u9879\u7684\u5143\u6570\u636e\u65f6\uff08\u4f8b\u5982\uff0c\u7528\u6237\u8bc4\u5206\u6216\u6536\u85cf\uff09\uff0c\u5e94\u4f7f\u7528 player.replaceMediaItem(index, newMediaItem)\u3002\u8fd9\u53ef\u4ee5\u5728\u4e0d\u4e2d\u65ad\u64ad\u653e\u7684\u60c5\u51b5\u4e0b\u65e0\u7f1d\u66f4\u65b0\u5143\u6570\u636e <sup>19<\/sup>\u3002<\/li>\n\n\n\n<li><strong>[\u2717] \u907f\u514d\u7f16\u5199\u84dd\u7259\u7279\u5b9a\u4ee3\u7801:<\/strong> Media3 \u7684\u8bbe\u8ba1\u7406\u5ff5\u662f\u8ba9\u5e94\u7528\u4e0e\u5e95\u5c42\u4f20\u8f93\u534f\u8bae\u89e3\u8026\u3002\u5f00\u53d1\u8005\u5e94\u5b8c\u5168\u4fe1\u8d56 MediaSession \u63d0\u4f9b\u7684\u62bd\u8c61\uff0c\u4e0d\u8981\u5c1d\u8bd5\u5728\u5e94\u7528\u4e2d\u6dfb\u52a0\u4efb\u4f55\u76f4\u63a5\u4e0e\u84dd\u7259 API \u4ea4\u4e92\u7684\u4ee3\u7801 <sup>36<\/sup>\u3002<\/li>\n\n\n\n<li><strong>[\u2713] \u5728\u591a\u79cd\u8bbe\u5907\u4e0a\u6d4b\u8bd5:<\/strong> \u5982\u679c\u6761\u4ef6\u5141\u8bb8\uff0c\u5e94\u5728\u4e0d\u540c\u7684\u84dd\u7259\u8bbe\u5907\uff08\u5c24\u5176\u662f\u4e0d\u540c\u54c1\u724c\u548c\u5e74\u4ee3\u7684\u8f66\u8f7d\u7cfb\u7edf\uff09\u4e0a\u6d4b\u8bd5\u5e94\u7528\u7684\u5143\u6570\u636e\u5c55\u793a\u3002AVRCP \u534f\u8bae\u7684\u5b9e\u73b0\u53ef\u80fd\u5b58\u5728\u5dee\u5f02\uff0c\u8fd9\u6709\u52a9\u4e8e\u53d1\u73b0\u6f5c\u5728\u7684\u517c\u5bb9\u6027\u95ee\u9898 <sup>44<\/sup>\u3002<\/li>\n\n\n\n<li><strong>[\u2713] \u4fdd\u6301\u5143\u6570\u636e\u5b57\u6bb5\u7684\u5408\u7406\u5927\u5c0f:<\/strong> \u786e\u4fdd\u6240\u6709\u4f5c\u4e3a\u5143\u6570\u636e\u4f20\u9012\u7684\u5b57\u7b26\u4e32\uff08\u5982\u6807\u9898\u3001\u827a\u672f\u5bb6\uff09\u957f\u5ea6\u5408\u7406\u3002\u867d\u7136\u6ca1\u6709\u660e\u786e\u7684\u5b98\u65b9\u9650\u5236\uff0c\u4f46\u8fc7\u957f\u7684\u5b57\u7b26\u4e32\u53ef\u80fd\u5728\u67d0\u4e9b\u8bbe\u5907\u7ec4\u5408\u4e0a\u5f15\u53d1\u95ee\u9898\uff0c\u8fd9\u662f\u4e00\u79cd\u9632\u5fa1\u6027\u7f16\u7a0b\u5b9e\u8df5 <sup>9<\/sup>\u3002<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%BC%95%E7%94%A8%E7%9A%84%E8%91%97%E4%BD%9C\"><\/span><strong>\u5f15\u7528\u7684\u8457\u4f5c<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Media3 is ready to play! &#8211; Android Developers Blog, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/android-developers.googleblog.com\/2023\/03\/media3-is-ready-to-play.html\">https:\/\/android-developers.googleblog.com\/2023\/03\/media3-is-ready-to-play.html<\/a><\/li>\n\n\n\n<li>Create a basic media player app using Media3 ExoPlayer &#8211; Android Developers, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/developer.android.com\/media\/implement\/playback-app\">https:\/\/developer.android.com\/media\/implement\/playback-app<\/a><\/li>\n\n\n\n<li>Control and advertise playback using a MediaSession | Android media, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/developer.android.com\/media\/media3\/session\/control-playback\">https:\/\/developer.android.com\/media\/media3\/session\/control-playback<\/a><\/li>\n\n\n\n<li>The MediaSession extension for ExoPlayer | by Marc B\u00e4chinger | AndroidX Media3, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/medium.com\/google-exoplayer\/the-mediasession-extension-for-exoplayer-82b9619deb2d\">https:\/\/medium.com\/google-exoplayer\/the-mediasession-extension-for-exoplayer-82b9619deb2d<\/a><\/li>\n\n\n\n<li>Connect to a media app &#8211; Android Developers, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/developer.android.com\/media\/media3\/session\/connect-to-media-app\">https:\/\/developer.android.com\/media\/media3\/session\/connect-to-media-app<\/a><\/li>\n\n\n\n<li>Using PlaybackState to update the current playback state \u00b7 Issue #789 \u00b7 androidx\/media &#8211; GitHub, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/github.com\/androidx\/media\/issues\/789\">https:\/\/github.com\/androidx\/media\/issues\/789<\/a><\/li>\n\n\n\n<li>Class androidx.media3.common.MediaMetadata.Builder, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/androidx.de\/androidx\/media3\/common\/MediaMetadata.Builder.html\">https:\/\/androidx.de\/androidx\/media3\/common\/MediaMetadata.Builder.html<\/a><\/li>\n\n\n\n<li>Media3 ExoPlayer getMediaMetadata() do not get correct data &#8211; Stack Overflow, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/stackoverflow.com\/questions\/77028032\/media3-exoplayer-getmediametadata-do-not-get-correct-data\">https:\/\/stackoverflow.com\/questions\/77028032\/media3-exoplayer-getmediametadata-do-not-get-correct-data<\/a><\/li>\n\n\n\n<li>MediaSessionCompat#setMetadata causing bluetooth disconnect on some devices \u00b7 Issue #564 \u00b7 androidx\/media &#8211; GitHub, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/github.com\/androidx\/media\/issues\/564\">https:\/\/github.com\/androidx\/media\/issues\/564<\/a><\/li>\n\n\n\n<li>Android Auto &#8211; Media3 and additional metadata indicators \u00b7 Issue #2127 \u00b7 androidx\/media &#8211; GitHub, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/github.com\/androidx\/media\/issues\/2127\">https:\/\/github.com\/androidx\/media\/issues\/2127<\/a><\/li>\n\n\n\n<li>Media items &#8211; Android Developers, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/developer.android.com\/media\/media3\/exoplayer\/media-items\">https:\/\/developer.android.com\/media\/media3\/exoplayer\/media-items<\/a><\/li>\n\n\n\n<li>Android Media3 Session &amp; Controller &#8211; Playback not starting &#8211; Stack Overflow, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/stackoverflow.com\/questions\/74035158\/android-media3-session-controller-playback-not-starting\">https:\/\/stackoverflow.com\/questions\/74035158\/android-media3-session-controller-playback-not-starting<\/a><\/li>\n\n\n\n<li>android &#8211; How to use media3 (with Exoplayer + MediaSessionService) &#8211; Stack Overflow, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/stackoverflow.com\/questions\/72560520\/how-to-use-media3-with-exoplayer-mediasessionservice\">https:\/\/stackoverflow.com\/questions\/72560520\/how-to-use-media3-with-exoplayer-mediasessionservice<\/a><\/li>\n\n\n\n<li>Player events | Android media, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/developer.android.com\/media\/media3\/exoplayer\/listening-to-player-events\">https:\/\/developer.android.com\/media\/media3\/exoplayer\/listening-to-player-events<\/a><\/li>\n\n\n\n<li>Class androidx.media3.common.Player.Listener, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/androidx.de\/androidx\/media3\/common\/Player.Listener.html\">https:\/\/androidx.de\/androidx\/media3\/common\/Player.Listener.html<\/a><\/li>\n\n\n\n<li>How to update current media metadata (user rating) without interrupting the playback? \u00b7 Issue #33 \u00b7 androidx\/media &#8211; GitHub, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/github.com\/androidx\/media\/issues\/33\">https:\/\/github.com\/androidx\/media\/issues\/33<\/a><\/li>\n\n\n\n<li>Extracting Metadata on Android and Web: Making Real-Time Data Sync Seamless \u2014 Part 2, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/engineering-at-physics-wallah.medium.com\/extracting-metadata-on-android-and-web-making-real-time-data-sync-seamless-part-2-e126267f640d\">https:\/\/engineering-at-physics-wallah.medium.com\/extracting-metadata-on-android-and-web-making-real-time-data-sync-seamless-part-2-e126267f640d<\/a><\/li>\n\n\n\n<li>Extracting metadata from Icecast stream using Exoplayer &#8211; Stack Overflow, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/stackoverflow.com\/questions\/30125471\/extracting-metadata-from-icecast-stream-using-exoplayer\">https:\/\/stackoverflow.com\/questions\/30125471\/extracting-metadata-from-icecast-stream-using-exoplayer<\/a><\/li>\n\n\n\n<li>update Mediaitem on mediasessionservice (media3) &#8211; Stack Overflow, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/stackoverflow.com\/questions\/79397575\/update-mediaitem-on-mediasessionservice-media3\">https:\/\/stackoverflow.com\/questions\/79397575\/update-mediaitem-on-mediasessionservice-media3<\/a><\/li>\n\n\n\n<li>Equivalent to the MediaSessionConnector.setMediaMetadataProvider \u00b7 Issue #615 \u00b7 androidx\/media &#8211; GitHub, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/github.com\/androidx\/media\/issues\/615\">https:\/\/github.com\/androidx\/media\/issues\/615<\/a><\/li>\n\n\n\n<li>Retrieving metadata | Android media, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/developer.android.com\/media\/media3\/exoplayer\/retrieving-metadata\">https:\/\/developer.android.com\/media\/media3\/exoplayer\/retrieving-metadata<\/a><\/li>\n\n\n\n<li>MediaController.addListener.onMediaItemTransition() may incorrect call \u00b7 Issue #92 \u00b7 androidx\/media &#8211; GitHub, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/github.com\/androidx\/media\/issues\/92\">https:\/\/github.com\/androidx\/media\/issues\/92<\/a><\/li>\n\n\n\n<li>AndroidX Media3 migration guide | Android media, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/developer.android.com\/media\/media3\/exoplayer\/migration-guide\">https:\/\/developer.android.com\/media\/media3\/exoplayer\/migration-guide<\/a><\/li>\n\n\n\n<li>Migrating from ExoPlayer 2 to Media3: A Fun &amp; Practical Guide | TO THE NEW Blog, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/www.tothenew.com\/blog\/migrating-from-exoplayer-2-to-media3-a-fun-practical-guide\/\">https:\/\/www.tothenew.com\/blog\/migrating-from-exoplayer-2-to-media3-a-fun-practical-guide\/<\/a><\/li>\n\n\n\n<li>Basic background playback implementation with Media3 MediaSessionService &#8211; Medium, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/medium.com\/@ouzhaneki\/basic-background-playback-implementation-with-media3-mediasessionservice-4d571f15bdc2\">https:\/\/medium.com\/@ouzhaneki\/basic-background-playback-implementation-with-media3-mediasessionservice-4d571f15bdc2<\/a><\/li>\n\n\n\n<li>Background playback with a MediaSessionService | Android media, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/developer.android.com\/media\/media3\/session\/background-playback\">https:\/\/developer.android.com\/media\/media3\/session\/background-playback<\/a><\/li>\n\n\n\n<li>android.media.session.MediaSession &#8211; Documentation &#8211; HCL Software Open Source, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"http:\/\/opensource.hcltechsw.com\/volt-mx-native-function-docs\/Android\/android.media.session-Android-10.0\/#!\/api\/android.media.session.MediaSession\">http:\/\/opensource.hcltechsw.com\/volt-mx-native-function-docs\/Android\/android.media.session-Android-10.0\/#!\/api\/android.media.session.MediaSession<\/a><\/li>\n\n\n\n<li>MediaSession Class (Android.Media.Session) &#8211; Learn Microsoft, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/learn.microsoft.com\/en-us\/dotnet\/api\/android.media.session.mediasession?view=net-android-35.0\">https:\/\/learn.microsoft.com\/en-us\/dotnet\/api\/android.media.session.mediasession?view=net-android-35.0<\/a><\/li>\n\n\n\n<li>Class androidx.media2.session.MediaController.Builder, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/www.androidx.de\/androidx\/media2\/session\/MediaController.Builder.html\">https:\/\/www.androidx.de\/androidx\/media2\/session\/MediaController.Builder.html<\/a><\/li>\n\n\n\n<li>media\/libraries\/session\/src\/main\/java\/androidx\/media3\/session\/MediaSession.java at release &#8211; GitHub, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/github.com\/androidx\/media\/blob\/release\/libraries\/session\/src\/main\/java\/androidx\/media3\/session\/MediaSession.java\">https:\/\/github.com\/androidx\/media\/blob\/release\/libraries\/session\/src\/main\/java\/androidx\/media3\/session\/MediaSession.java<\/a><\/li>\n\n\n\n<li>MediaSession | API reference &#8211; Android Developers, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/developer.android.com\/reference\/android\/media\/session\/MediaSession\">https:\/\/developer.android.com\/reference\/android\/media\/session\/MediaSession<\/a><\/li>\n\n\n\n<li>MediaSessionManager Class (Android.Media.Session) &#8211; Learn Microsoft, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/learn.microsoft.com\/en-us\/dotnet\/api\/android.media.session.mediasessionmanager?view=net-android-34.0\">https:\/\/learn.microsoft.com\/en-us\/dotnet\/api\/android.media.session.mediasessionmanager?view=net-android-34.0<\/a><\/li>\n\n\n\n<li>MediaSessionManager &#8211; Android Developers, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"http:\/\/docs.52im.net\/extend\/docs\/api\/android-50\/reference\/android\/media\/session\/MediaSessionManager.html\">http:\/\/docs.52im.net\/extend\/docs\/api\/android-50\/reference\/android\/media\/session\/MediaSessionManager.html<\/a><\/li>\n\n\n\n<li>android.media.session.MediaSessionManager &#8211; HCL Software Open Source, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"http:\/\/opensource.hcltechsw.com\/volt-mx-native-function-docs\/Android\/android.media.session-Android-10.0\/#!\/api\/android.media.session.MediaSessionManager\">http:\/\/opensource.hcltechsw.com\/volt-mx-native-function-docs\/Android\/android.media.session-Android-10.0\/#!\/api\/android.media.session.MediaSessionManager<\/a><\/li>\n\n\n\n<li>media\/java\/android\/media\/session\/MediaSessionManager.java &#8211; platform\/frameworks\/base &#8211; Git at Google, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/android.googlesource.com\/platform\/frameworks\/base\/+\/73e23e2\/media\/java\/android\/media\/session\/MediaSessionManager.java\">https:\/\/android.googlesource.com\/platform\/frameworks\/base\/+\/73e23e2\/media\/java\/android\/media\/session\/MediaSessionManager.java<\/a><\/li>\n\n\n\n<li>Support for AVRCP (Bluetooth playback control\/metadata) (#190) \u00b7 Issue \u00b7 gateship-one\/malp &#8211; GitLab, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/gitlab.com\/gateship-one\/malp\/-\/issues\/190\">https:\/\/gitlab.com\/gateship-one\/malp\/-\/issues\/190<\/a><\/li>\n\n\n\n<li>Android: Sending Metadata from media player app to car stereo via bluetooth blocks broadcast receiver to play next song or pause music &#8211; Stack Overflow, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/stackoverflow.com\/questions\/53336480\/android-sending-metadata-from-media-player-app-to-car-stereo-via-bluetooth-bloc\">https:\/\/stackoverflow.com\/questions\/53336480\/android-sending-metadata-from-media-player-app-to-car-stereo-via-bluetooth-bloc<\/a><\/li>\n\n\n\n<li>MediaSessionManager.IOnActiveSessionsChangedListener Interface (Android.Media.Session) | Microsoft Learn, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/learn.microsoft.com\/en-us\/dotnet\/api\/android.media.session.mediasessionmanager.ionactivesessionschangedlistener?view=net-android-34.0\">https:\/\/learn.microsoft.com\/en-us\/dotnet\/api\/android.media.session.mediasessionmanager.ionactivesessionschangedlistener?view=net-android-34.0<\/a><\/li>\n\n\n\n<li>services\/A2dpMediaBrowserService\/src\/com\/google\/android &#8230;, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/android.googlesource.com\/platform\/packages\/apps\/Bluetooth\/+\/702c59f\/services\/A2dpMediaBrowserService\/src\/com\/google\/android\/a2dpsink\/mbs\/A2dpMediaBrowserService.java\">https:\/\/android.googlesource.com\/platform\/packages\/apps\/Bluetooth\/+\/702c59f\/services\/A2dpMediaBrowserService\/src\/com\/google\/android\/a2dpsink\/mbs\/A2dpMediaBrowserService.java<\/a><\/li>\n\n\n\n<li>android.bluetooth.BluetoothAvrcpController &#8211; Documentation &#8211; HCL Software Open Source, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"http:\/\/opensource.hcltechsw.com\/volt-mx-native-function-docs\/Android\/android.bluetooth-Android-10.0\/#!\/api\/android.bluetooth.BluetoothAvrcpController\">http:\/\/opensource.hcltechsw.com\/volt-mx-native-function-docs\/Android\/android.bluetooth-Android-10.0\/#!\/api\/android.bluetooth.BluetoothAvrcpController<\/a><\/li>\n\n\n\n<li>Bluetooth A2DP + AVRCP 1.3+ module &#8211; Stack Overflow, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/stackoverflow.com\/questions\/21653735\/bluetooth-a2dp-avrcp-1-3-module\">https:\/\/stackoverflow.com\/questions\/21653735\/bluetooth-a2dp-avrcp-1-3-module<\/a><\/li>\n\n\n\n<li>Android &#8211; How to update MediaSession Metadata so song changes are reflected on bluetooth connected device? &#8211; Stack Overflow, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/stackoverflow.com\/questions\/68477594\/android-how-to-update-mediasession-metadata-so-song-changes-are-reflected-on-b\">https:\/\/stackoverflow.com\/questions\/68477594\/android-how-to-update-mediasession-metadata-so-song-changes-are-reflected-on-b<\/a><\/li>\n\n\n\n<li>Try this: Developer Settings -> Bluetooth AVRCP Version -> 1.6 : r\/pixelbuds &#8211; Reddit, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/www.reddit.com\/r\/pixelbuds\/comments\/irg4rm\/try_this_developer_settings_bluetooth_avrcp\/\">https:\/\/www.reddit.com\/r\/pixelbuds\/comments\/irg4rm\/try_this_developer_settings_bluetooth_avrcp\/<\/a><\/li>\n\n\n\n<li>Metadata Problems: Android to Car Stereo via Bluetooth : r\/plexamp &#8211; Reddit, \u8bbf\u95ee\u65f6\u95f4\u4e3a \u4e03\u6708 15, 2025\uff0c <a href=\"https:\/\/www.reddit.com\/r\/plexamp\/comments\/tszmr4\/metadata_problems_android_to_car_stereo_via\/\">https:\/\/www.reddit.com\/r\/plexamp\/comments\/tszmr4\/metadata_problems_android_to_car_stereo_via\/<\/a><\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>\u7b2c 1 \u8282\uff1aMedia3 \u751f\u6001\u7cfb\u7edf\u5bfc\u8bba 1.1 \u73b0\u4ee3 Android \u5a92\u4f53\u67b6\u6784 Android Media3 \u662f\u4e00\u4e2a\u65e8\u5728\u7edf\u4e00\u548c\u7b80\u5316\u5a92\u4f53\u5e94\u7528\u5f00\u53d1\u7684\u7efc\u5408\u6027\u5e93\u5957\u4ef6\u3002\u5b83\u6807\u5fd7\u7740 Android \u5e73\u53f0\u5728\u5a92\u4f53\u5904\u7406\u65b9\u9762\u7684\u4e00\u6b21\u91cd\u5927\u6f14\u8fdb\uff0c\u65e8\u5728\u53d6\u4ee3\u4e4b\u524d\u5206\u6563\u7684 API\uff0c\u5982 ExoPlayer\u3001MediaSessionCompat \u548c MediaBrowserServiceCompat\u3002Media3 \u7684\u6838\u5fc3\u7406\u5ff5\u662f\u4e3a\u6240\u6709\u5a92\u4f53\u7528\u4f8b\uff08\u4ece\u7b80\u5355\u7684\u97f3\u89c6\u9891\u64ad\u653e\u5230\u590d\u6742\u7684\u89c6\u9891\u7f16\u8f91\u548c\u8f6c\u7801\uff09\u63d0\u4f9b\u4e00\u4e2a\u7edf\u4e00\u3001\u5065\u58ee\u4e14\u5411\u540e\u517c\u5bb9\u7684 API \u96c6\u5408 1\u3002\u8fd9\u79cd\u7edf\u4e00\u7684\u67b6\u6784\u6781\u5927\u5730\u964d\u4f4e\u4e86\u5f00\u53d1\u8005\u7684\u590d\u6742\u6027\uff0c\u5e76\u786e\u4fdd\u4e86\u5728\u4e0d\u540c Android \u7248\u672c\u548c\u8bbe\u5907\u95f4\u7684\u4e00\u81f4\u884c\u4e3a\u3002 \u8be5\u67b6\u6784\u5efa\u7acb\u5728\u51e0\u4e2a\u6838\u5fc3\u7ec4\u4ef6\u4e4b\u4e0a\uff0c\u8fd9\u4e9b\u7ec4\u4ef6\u534f\u540c\u5de5\u4f5c\uff0c\u6784\u6210\u4e86\u4e00\u4e2a\u529f\u80fd\u5f3a\u5927\u4e14\u7075\u6d3b\u7684\u5a92\u4f53\u64ad\u653e\u6846\u67b6\u3002 1.2 MediaMetadata\uff1a\u901a\u7528\u8bed\u8a00 \u5728\u6574\u4e2a Media3 \u751f\u6001\u7cfb\u7edf\u4e2d\uff0candroidx.media3.common.MediaMetadata \u7c7b\u626e\u6f14\u7740\u81f3\u5173\u91cd\u8981\u7684\u89d2\u8272\u3002\u5b83\u662f\u4e00\u4e2a\u6807\u51c6\u5316\u7684\u6570\u636e\u7ed3\u6784\uff0c\u76f8\u5f53\u4e8e\u5a92\u4f53\u5185\u5bb9\u7684\u201c\u62a4\u7167\u201d\u6216\u201c\u8eab\u4efd\u8bc1\u201d\u3002\u5b83\u627f\u8f7d\u4e86\u5173\u4e8e\u5a92\u4f53\u9879\u7684\u6240\u6709\u63cf\u8ff0\u6027\u4fe1\u606f\uff0c\u5982\u6807\u9898\u3001\u827a\u672f\u5bb6\u3001\u4e13\u8f91\u3001\u5c01\u9762\u56fe\u7b49\u3002\u5f53\u8fd9\u4e9b\u4fe1\u606f\u88ab\u5c01\u88c5\u5728 MediaMetadata 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