{"id":76185,"date":"2026-02-21T22:25:44","date_gmt":"2026-02-21T14:25:44","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/76185.html"},"modified":"2026-02-21T22:25:44","modified_gmt":"2026-02-21T14:25:44","slug":"flutter%e4%b8%89%e6%96%b9%e5%ba%93%e9%80%82%e9%85%8dopenharmony%e3%80%90flutter_speech%e3%80%91-%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e5%ae%9e%e8%b7%b5","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/76185.html","title":{"rendered":"Flutter\u4e09\u65b9\u5e93\u9002\u914dOpenHarmony\u3010flutter_speech\u3011\u2014 \u6027\u80fd\u4f18\u5316\u5b9e\u8df5"},"content":{"rendered":"

\u524d\u8a00<\/h3>\n

\u6b22\u8fce\u52a0\u5165\u5f00\u6e90\u9e3f\u8499\u8de8\u5e73\u53f0\u793e\u533a：https:\/\/openharmonycrossplatform.csdn.net<\/p>\n

flutter_speech\u7684\u6838\u5fc3\u529f\u80fd\u5df2\u7ecf\u8dd1\u901a\u4e86，\u4f46"\u80fd\u7528"\u548c"\u597d\u7528"\u4e4b\u95f4\u8fd8\u6709\u4e00\u6bb5\u8ddd\u79bb\u3002\u6027\u80fd\u4f18\u5316\u5c31\u662f\u7f29\u77ed\u8fd9\u6bb5\u8ddd\u79bb\u7684\u5173\u952e\u3002<\/p>\n

\u8bed\u97f3\u8bc6\u522b\u63d2\u4ef6\u7684\u6027\u80fd\u4e3b\u8981\u4f53\u73b0\u5728\u4e09\u4e2a\u65b9\u9762：\u54cd\u5e94\u901f\u5ea6（\u4ece\u70b9\u51fb\u5230\u5f00\u59cb\u8bc6\u522b\u7684\u5ef6\u8fdf）\u3001\u8bc6\u522b\u5ef6\u8fdf（\u4ece\u8bf4\u5b8c\u8bdd\u5230\u51fa\u7ed3\u679c\u7684\u65f6\u95f4）\u3001\u8d44\u6e90\u6d88\u8017（CPU\u3001\u5185\u5b58\u3001\u7535\u91cf）\u3002\u8fd9\u4e09\u8005\u5f80\u5f80\u9700\u8981\u6743\u8861\u2014\u2014\u66f4\u5feb\u7684\u54cd\u5e94\u53ef\u80fd\u610f\u5473\u7740\u66f4\u9ad8\u7684\u8d44\u6e90\u6d88\u8017\u3002<\/p>\n

\u4eca\u5929\u5206\u4eab\u4e00\u4e9b\u5b9e\u7528\u7684\u4f18\u5316\u7b56\u7565\u3002<\/p>\n

\u4e00\u3001\u8bed\u97f3\u8bc6\u522b\u5f15\u64ce\u590d\u7528\u7b56\u7565<\/h3>\n

1.1 \u5f53\u524d\u7684\u95ee\u9898<\/h4>\n

flutter_speech\u793a\u4f8bApp\u6bcf\u6b21\u70b9\u51fbListen\u90fd\u4f1a\u91cd\u65b0activate：<\/p>\n

void<\/span> start<\/span>(<\/span>)<\/span> =<\/span>><\/span> _speech.<\/span>activate<\/span>(<\/span>selectedLang.<\/span>code)<\/span>.<\/span>then<\/span>(<\/span>(<\/span>_)<\/span> {<\/span>
\n return<\/span> _speech.<\/span>listen<\/span>(<\/span>)<\/span>.<\/span>then<\/span>(<\/span>(<\/span>result)<\/span> {<\/span>
\n setState<\/span>(<\/span>(<\/span>)<\/span> =<\/span>><\/span> _isListening =<\/span> result)<\/span>;<\/span>
\n }<\/span>)<\/span>;<\/span>
\n }<\/span>)<\/span>;<\/span><\/p>\n

\u6bcf\u6b21activate\u90fd\u4f1a：<\/p>\n

  • \u7533\u8bf7\u6743\u9650（\u5df2\u6388\u6743\u65f6\u5f88\u5feb，\u4f46\u4ecd\u6709\u5f00\u9500）<\/li>\n
  • \u68c0\u6d4b\u80fd\u529b<\/li>\n
  • \u521b\u5efa\u5f15\u64ce（500ms-3\u79d2）<\/li>\n
  • \u8bbe\u7f6e\u76d1\u542c\u5668<\/li>\n

    \u5982\u679c\u7528\u6237\u9891\u7e41\u4f7f\u7528\u8bed\u97f3\u8bc6\u522b，\u6bcf\u6b21\u90fd\u91cd\u65b0\u521b\u5efa\u5f15\u64ce\u662f\u5f88\u5927\u7684\u6d6a\u8d39\u3002<\/p>\n

    1.2 \u5f15\u64ce\u590d\u7528\u65b9\u6848<\/h4>\n

    \/\/ \u6539\u8fdb：\u53ea\u5728\u9996\u6b21\u6216\u8bed\u8a00\u53d8\u5316\u65f6activate<\/span>
    \nString<\/span>?<\/span> _activatedLocale;<\/span><\/p>\n

    void<\/span> start<\/span>(<\/span>)<\/span> async<\/span> {<\/span>
    \n if<\/span> (<\/span>_activatedLocale !=<\/span> selectedLang.<\/span>code)<\/span> {<\/span>
    \n \/\/ \u8bed\u8a00\u53d8\u5316\u6216\u9996\u6b21\u4f7f\u7528，\u9700\u8981\u91cd\u65b0activate<\/span>
    \n await<\/span> _speech.<\/span>activate<\/span>(<\/span>selectedLang.<\/span>code)<\/span>;<\/span>
    \n _activatedLocale =<\/span> selectedLang.<\/span>code;<\/span>
    \n }<\/span>
    \n \/\/ \u76f4\u63a5listen，\u590d\u7528\u5df2\u6709\u5f15\u64ce<\/span>
    \n final<\/span> result =<\/span> await<\/span> _speech.<\/span>listen<\/span>(<\/span>)<\/span>;<\/span>
    \n setState<\/span>(<\/span>(<\/span>)<\/span> =<\/span>><\/span> _isListening =<\/span> result)<\/span>;<\/span>
    \n}<\/span><\/p>\n

    1.3 \u539f\u751f\u7aef\u7684\u914d\u5408<\/h4>\n

    \u5f53\u524d\u539f\u751f\u7aef\u6bcf\u6b21activate\u90fd\u4f1a\u521b\u5efa\u65b0\u5f15\u64ce\u3002\u53ef\u4ee5\u52a0\u4e00\u4e2a\u5f15\u64ce\u590d\u7528\u5224\u65ad：<\/p>\n

    private<\/span> async<\/span> activate<\/span>(<\/span>locale:<\/span> string<\/span>,<\/span> result:<\/span> MethodResult)<\/span>:<\/span> Promise<\/span><<\/span>void<\/span>><\/span> {<\/span>
    \n \/\/ \u5982\u679c\u5f15\u64ce\u5df2\u5b58\u5728\u4e14\u8bed\u8a00\u76f8\u540c，\u76f4\u63a5\u8fd4\u56de\u6210\u529f<\/span>
    \n if<\/span> (<\/span>this<\/span>.<\/span>asrEngine &&<\/span> this<\/span>.<\/span>currentLocale ===<\/span> locale)<\/span> {<\/span>
    \n console<\/span>.<\/span>info<\/span>(<\/span>TAG<\/span>,<\/span> 'reusing existing engine'<\/span>)<\/span>;<\/span>
    \n this<\/span>.<\/span>channel?.<\/span>invokeMethod<\/span>(<\/span>'speech.onSpeechAvailability'<\/span>,<\/span> true<\/span>)<\/span>;<\/span>
    \n result.<\/span>success<\/span>(<\/span>true<\/span>)<\/span>;<\/span>
    \n return<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u5982\u679c\u5f15\u64ce\u5b58\u5728\u4f46\u8bed\u8a00\u4e0d\u540c，\u5148\u9500\u6bc1<\/span>
    \n if<\/span> (<\/span>this<\/span>.<\/span>asrEngine)<\/span> {<\/span>
    \n this<\/span>.<\/span>destroyEngine<\/span>(<\/span>)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u521b\u5efa\u65b0\u5f15\u64ce…<\/span>
    \n}<\/span><\/p>\n

    1.4 \u590d\u7528\u7684\u6536\u76ca<\/h4>\n\n\u573a\u666f\u4e0d\u590d\u7528\u590d\u7528\u8282\u7701<\/tr>\n\n\n\n\n\n
    \u7b2c1\u6b21\u8bc6\u522b<\/td>\n~2\u79d2<\/td>\n~2\u79d2<\/td>\n0<\/td>\n<\/tr>\n
    \u7b2c2\u6b21\u8bc6\u522b（\u540c\u8bed\u8a00）<\/td>\n~2\u79d2<\/td>\n<100ms<\/td>\n~1.9\u79d2<\/td>\n<\/tr>\n
    \u7b2c3\u6b21\u8bc6\u522b（\u540c\u8bed\u8a00）<\/td>\n~2\u79d2<\/td>\n<100ms<\/td>\n~1.9\u79d2<\/td>\n<\/tr>\n
    \u5207\u6362\u8bed\u8a00\u540e<\/td>\n~2\u79d2<\/td>\n~2\u79d2<\/td>\n0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    💡 \u5f15\u64ce\u590d\u7528\u662f\u6700\u6709\u6548\u7684\u4f18\u5316\u3002\u5bf9\u4e8e\u9891\u7e41\u4f7f\u7528\u8bed\u97f3\u8bc6\u522b\u7684\u573a\u666f，\u53ef\u4ee5\u5c06\u54cd\u5e94\u65f6\u95f4\u4ece2\u79d2\u964d\u5230100\u6beb\u79d2\u4ee5\u5185\u3002<\/p>\n

    \u4e8c\u3001VAD（Voice Activity Detection）\u53c2\u6570\u8c03\u4f18<\/h3>\n

    2.1 VAD\u53c2\u6570\u56de\u987e<\/h4>\n

    const<\/span> extraParam:<\/span> Record<<\/span>string<\/span>,<\/span> Object><\/span> =<\/span> {<\/span>
    \n "recognitionMode"<\/span>:<\/span> 0<\/span>,<\/span>
    \n "vadBegin"<\/span>:<\/span> 2000<\/span>,<\/span> \/\/ \u7b49\u5f85\u5f00\u53e3\u8d85\u65f6<\/span>
    \n "vadEnd"<\/span>:<\/span> 3000<\/span>,<\/span> \/\/ \u9759\u97f3\u505c\u6b62\u8d85\u65f6<\/span>
    \n "maxAudioDuration"<\/span>:<\/span> 60000<\/span>
    \n}<\/span>;<\/span><\/p>\n

    2.2 vadBegin\u8c03\u4f18<\/h4>\n

    vadBegin\u5f71\u54cd"\u7528\u6237\u70b9\u51fb\u540e\u5230\u8d85\u65f6\u62a5\u9519"\u7684\u7b49\u5f85\u65f6\u95f4\u3002<\/p>\n\n\u503c\u7528\u6237\u4f53\u9a8c\u9002\u7528\u573a\u666f<\/tr>\n\n\n\n\n\n
    1000ms<\/td>\n\u53cd\u5e94\u5feb\u4f46\u5bb9\u6613\u8bef\u8d85\u65f6<\/td>\n\u719f\u7ec3\u7528\u6237\u3001\u8bed\u97f3\u6307\u4ee4<\/td>\n<\/tr>\n
    2000ms<\/td>\n\u5e73\u8861（\u9ed8\u8ba4）<\/td>\n\u901a\u7528\u573a\u666f<\/td>\n<\/tr>\n
    3000ms<\/td>\n\u5bbd\u5bb9\u4f46\u7b49\u5f85\u4e45<\/td>\n\u8001\u5e74\u7528\u6237\u3001\u601d\u8003\u578b\u8f93\u5165<\/td>\n<\/tr>\n
    5000ms<\/td>\n\u5f88\u5bbd\u5bb9<\/td>\n\u7279\u6b8a\u9700\u6c42<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    2.3 vadEnd\u8c03\u4f18<\/h4>\n

    vadEnd\u5f71\u54cd"\u7528\u6237\u8bf4\u5b8c\u540e\u5230\u8fd4\u56de\u7ed3\u679c"\u7684\u7b49\u5f85\u65f6\u95f4\u3002\u8fd9\u662f\u7528\u6237\u611f\u77e5\u6700\u660e\u663e\u7684\u5ef6\u8fdf\u3002<\/p>\n\n\u503c\u7528\u6237\u4f53\u9a8c\u9002\u7528\u573a\u666f<\/tr>\n\n\n\n\n\n
    1500ms<\/td>\n\u5feb\u901f\u54cd\u5e94\u4f46\u53ef\u80fd\u622a\u65ad<\/td>\n\u77ed\u6307\u4ee4<\/td>\n<\/tr>\n
    2000ms<\/td>\n\u8f83\u5feb<\/td>\n\u77ed\u53e5<\/td>\n<\/tr>\n
    3000ms<\/td>\n\u5e73\u8861（\u9ed8\u8ba4）<\/td>\n\u901a\u7528\u573a\u666f<\/td>\n<\/tr>\n
    5000ms<\/td>\n\u5141\u8bb8\u957f\u505c\u987f<\/td>\n\u957f\u53e5\u3001\u601d\u8003\u578b<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    🎯 \u8c03\u4f18\u539f\u5219：vadEnd\u8d8a\u77ed，\u7528\u6237\u7b49\u5f85\u65f6\u95f4\u8d8a\u77ed，\u4f46\u8d8a\u5bb9\u6613\u5728\u7528\u6237\u505c\u987f\u65f6\u8bef\u5224\u4e3a"\u8bf4\u5b8c\u4e86"\u3002\u9700\u8981\u6839\u636e\u5b9e\u9645\u573a\u666f\u627e\u5e73\u8861\u70b9\u3002<\/p>\n

    2.4 \u52a8\u6001VAD\u8c03\u6574<\/h4>\n

    \u66f4\u9ad8\u7ea7\u7684\u65b9\u6848\u662f\u6839\u636e\u7528\u6237\u884c\u4e3a\u52a8\u6001\u8c03\u6574VAD\u53c2\u6570：<\/p>\n

    \/\/ \u6839\u636e\u8bc6\u522b\u6a21\u5f0f\u52a8\u6001\u8bbe\u7f6eVAD<\/span>
    \nprivate<\/span> getVadParams<\/span>(<\/span>mode:<\/span> string<\/span>)<\/span>:<\/span> Record<<\/span>string<\/span>,<\/span> Object><\/span> {<\/span>
    \n switch<\/span> (<\/span>mode)<\/span> {<\/span>
    \n case<\/span> 'command'<\/span>:<\/span> \/\/ \u8bed\u97f3\u6307\u4ee4\u6a21\u5f0f<\/span>
    \n return<\/span> {<\/span> "vadBegin"<\/span>:<\/span> 1500<\/span>,<\/span> "vadEnd"<\/span>:<\/span> 1500<\/span>,<\/span> "maxAudioDuration"<\/span>:<\/span> 10000<\/span> }<\/span>;<\/span>
    \n case<\/span> 'dictation'<\/span>:<\/span> \/\/ \u542c\u5199\u6a21\u5f0f<\/span>
    \n return<\/span> {<\/span> "vadBegin"<\/span>:<\/span> 3000<\/span>,<\/span> "vadEnd"<\/span>:<\/span> 5000<\/span>,<\/span> "maxAudioDuration"<\/span>:<\/span> 300000<\/span> }<\/span>;<\/span>
    \n default<\/span>:<\/span> \/\/ \u9ed8\u8ba4\u6a21\u5f0f<\/span>
    \n return<\/span> {<\/span> "vadBegin"<\/span>:<\/span> 2000<\/span>,<\/span> "vadEnd"<\/span>:<\/span> 3000<\/span>,<\/span> "maxAudioDuration"<\/span>:<\/span> 60000<\/span> }<\/span>;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    \u4e09\u3001\u91c7\u6837\u7387\u4e0e\u97f3\u9891\u8d28\u91cf\u7684\u5e73\u8861<\/h3>\n

    3.1 \u5f53\u524d\u914d\u7f6e<\/h4>\n

    const<\/span> audioParam:<\/span> speechRecognizer.<\/span>AudioInfo =<\/span> {<\/span>
    \n audioType:<\/span> 'pcm'<\/span>,<\/span>
    \n sampleRate:<\/span> 16000<\/span>,<\/span> \/\/ 16kHz<\/span>
    \n soundChannel:<\/span> 1<\/span>,<\/span> \/\/ \u5355\u58f0\u9053<\/span>
    \n sampleBit:<\/span> 16<\/span> \/\/ 16bit<\/span>
    \n}<\/span>;<\/span><\/p>\n

    3.2 \u6570\u636e\u91cf\u5bf9\u6bd4<\/h4>\n\n\u914d\u7f6e\u6570\u636e\u738760\u79d2\u6570\u636e\u91cf\u8bc6\u522b\u8d28\u91cf<\/tr>\n\n\n\n\n\n
    8kHz\/8bit\/mono<\/td>\n8 KB\/s<\/td>\n480 KB<\/td>\n\u5dee<\/td>\n<\/tr>\n
    16kHz\/16bit\/mono<\/td>\n32 KB\/s<\/td>\n1.9 MB<\/td>\n\u597d（\u63a8\u8350）<\/td>\n<\/tr>\n
    44.1kHz\/16bit\/mono<\/td>\n88 KB\/s<\/td>\n5.3 MB<\/td>\n\u597d（\u6d6a\u8d39）<\/td>\n<\/tr>\n
    44.1kHz\/16bit\/stereo<\/td>\n176 KB\/s<\/td>\n10.6 MB<\/td>\n\u597d（\u66f4\u6d6a\u8d39）<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    3.3 \u4e3a\u4ec0\u4e48\u4e0d\u7528\u66f4\u9ad8\u91c7\u6837\u7387<\/h4>\n

    16kHz\u5df2\u7ecf\u8986\u76d6\u4e86\u4eba\u7c7b\u8bed\u97f3\u7684\u4e3b\u8981\u9891\u7387\u8303\u56f4（300Hz-3400Hz\u7684\u57fa\u9891，\u52a0\u4e0a\u8c10\u6ce2\u52308kHz）\u3002\u66f4\u9ad8\u7684\u91c7\u6837\u7387\u53ea\u4f1a\u589e\u52a0\u6570\u636e\u91cf，\u4e0d\u4f1a\u663e\u8457\u63d0\u5347\u8bc6\u522b\u51c6\u786e\u7387\u3002<\/p>\n

    \u8bed\u97f3\u8bc6\u522b\u6a21\u578b\u901a\u5e38\u572816kHz\u6570\u636e\u4e0a\u8bad\u7ec3，\u8f93\u5165\u5176\u4ed6\u91c7\u6837\u7387\u7684\u6570\u636e\u53cd\u800c\u53ef\u80fd\u964d\u4f4e\u51c6\u786e\u7387（\u56e0\u4e3a\u7279\u5f81\u5206\u5e03\u4e0d\u540c）\u3002<\/p>\n

    3.4 \u7f51\u7edc\u5e26\u5bbd\u8003\u8651<\/h4>\n

    \u5728\u7ebf\u8bc6\u522b\u6a21\u5f0f\u4e0b，\u97f3\u9891\u6570\u636e\u9700\u8981\u4e0a\u4f20\u5230\u4e91\u7aef\u300232 KB\/s\u7684\u6570\u636e\u7387\u5bf9\u4e8e4G\/5G\/WiFi\u6765\u8bf4\u5b8c\u5168\u4e0d\u662f\u95ee\u9898，\u4f46\u5728\u5f31\u7f51\u73af\u5883\u4e0b\u53ef\u80fd\u4f1a\u6709\u5ef6\u8fdf\u3002<\/p>\n

    32 KB\/s \u00d7 8 = 256 kbps<\/p>\n

    \u7f51\u7edc\u7c7b\u578b \u5e26\u5bbd \u662f\u5426\u8db3\u591f
    \nWiFi >10 Mbps \u2705 \u7ef0\u7ef0\u6709\u4f59
    \n4G >1 Mbps \u2705 \u8db3\u591f
    \n3G ~384 kbps \u26a0\ufe0f \u521a\u597d\u591f
    \n2G ~64 kbps \u274c \u4e0d\u591f<\/p>\n

    \u56db\u3001\u8bc6\u522b\u5ef6\u8fdf\u4f18\u5316：vadBegin \/ vadEnd \u914d\u7f6e<\/h3>\n

    4.1 \u5ef6\u8fdf\u7ec4\u6210\u5206\u6790<\/h4>\n

    \u4ece\u7528\u6237\u70b9\u51fb"Listen"\u5230\u770b\u5230\u6700\u7ec8\u7ed3\u679c，\u603b\u5ef6\u8fdf\u7531\u4ee5\u4e0b\u90e8\u5206\u7ec4\u6210：<\/p>\n

    \u603b\u5ef6\u8fdf = \u5f15\u64ce\u542f\u52a8\u5ef6\u8fdf + \u7528\u6237\u8bf4\u8bdd\u65f6\u95f4 + VAD\u7b49\u5f85\u65f6\u95f4 + \u7f51\u7edc\u4f20\u8f93\u65f6\u95f4 + \u670d\u52a1\u7aef\u5904\u7406\u65f6\u95f4<\/p>\n\n\u5ef6\u8fdf\u7ec4\u6210\u5178\u578b\u503c\u53ef\u4f18\u5316<\/tr>\n\n\n\n\n\n\n
    \u5f15\u64ce\u542f\u52a8<\/td>\n100-500ms<\/td>\n\u2705 \u5f15\u64ce\u590d\u7528<\/td>\n<\/tr>\n
    \u7528\u6237\u8bf4\u8bdd<\/td>\n1-10\u79d2<\/td>\n\u274c \u7528\u6237\u51b3\u5b9a<\/td>\n<\/tr>\n
    VAD\u7b49\u5f85(vadEnd)<\/td>\n1.5-5\u79d2<\/td>\n\u2705 \u53c2\u6570\u8c03\u4f18<\/td>\n<\/tr>\n
    \u7f51\u7edc\u4f20\u8f93<\/td>\n100-500ms<\/td>\n\u26a0\ufe0f \u53d6\u51b3\u4e8e\u7f51\u7edc<\/td>\n<\/tr>\n
    \u670d\u52a1\u7aef\u5904\u7406<\/td>\n200-1000ms<\/td>\n\u274c \u670d\u52a1\u7aef\u51b3\u5b9a<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    4.2 \u53ef\u4f18\u5316\u7684\u90e8\u5206<\/h4>\n

    \u5f15\u64ce\u542f\u52a8\u5ef6\u8fdf：\u901a\u8fc7\u5f15\u64ce\u590d\u7528\u53ef\u4ee5\u4ece500ms\u964d\u5230<100ms\u3002<\/p>\n

    VAD\u7b49\u5f85\u65f6\u95f4：\u8fd9\u662f\u6700\u5927\u7684\u53ef\u4f18\u5316\u9879\u3002\u9ed8\u8ba4vadEnd=3000ms\u610f\u5473\u7740\u7528\u6237\u8bf4\u5b8c\u540e\u8981\u7b493\u79d2\u624d\u80fd\u770b\u5230\u6700\u7ec8\u7ed3\u679c\u3002<\/p>\n

    4.3 \u51cf\u5c11\u611f\u77e5\u5ef6\u8fdf<\/h4>\n

    \u5373\u4f7f\u4e0d\u80fd\u51cf\u5c11\u5b9e\u9645\u5ef6\u8fdf，\u4e5f\u53ef\u4ee5\u51cf\u5c11\u611f\u77e5\u5ef6\u8fdf：<\/p>\n

  • \u5b9e\u65f6\u663e\u793a\u90e8\u5206\u7ed3\u679c：\u7528\u6237\u8bf4\u8bdd\u65f6\u5c31\u80fd\u770b\u5230\u6587\u5b57，\u4e0d\u9700\u8981\u7b49\u6700\u7ec8\u7ed3\u679c<\/li>\n
  • \u52a8\u753b\u53cd\u9988：\u663e\u793a\u5f55\u97f3\u6ce2\u5f62\u6216\u8109\u51b2\u52a8\u753b，\u8ba9\u7528\u6237\u77e5\u9053\u7cfb\u7edf\u5728\u5de5\u4f5c<\/li>\n
  • \u9884\u6d4b\u6027UI：\u5728VAD\u7b49\u5f85\u671f\u95f4\u663e\u793a"\u6b63\u5728\u5904\u7406\u2026"<\/li>\n

    \/\/ \u5b9e\u65f6\u663e\u793a\u90e8\u5206\u7ed3\u679c（flutter_speech\u5df2\u5b9e\u73b0）<\/span>
    \n_speech.<\/span>setRecognitionResultHandler<\/span>(<\/span>(<\/span>String<\/span> text)<\/span> {<\/span>
    \n setState<\/span>(<\/span>(<\/span>)<\/span> =<\/span>><\/span> transcription =<\/span> text)<\/span>;<\/span> \/\/ \u5b9e\u65f6\u66f4\u65b0<\/span>
    \n}<\/span>)<\/span>;<\/span><\/p>\n

    4.4 \u624b\u52a8stop vs VAD\u81ea\u52a8\u505c\u6b62<\/h4>\n\n\u65b9\u5f0f\u5ef6\u8fdf\u7528\u6237\u4f53\u9a8c<\/tr>\n\n\n\n\n
    VAD\u81ea\u52a8\u505c\u6b62<\/td>\n+vadEnd\u65f6\u95f4<\/td>\n\u65e0\u9700\u64cd\u4f5c，\u4f46\u8981\u7b49<\/td>\n<\/tr>\n
    \u624b\u52a8stop<\/td>\n\u65e0\u989d\u5916\u5ef6\u8fdf<\/td>\n\u9700\u8981\u70b9\u51fb\u6309\u94ae<\/td>\n<\/tr>\n
    \u6309\u4f4f\u8bf4\u8bdd（PTT）<\/td>\n\u65e0\u989d\u5916\u5ef6\u8fdf<\/td>\n\u677e\u624b\u5373\u505c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u201c\u6309\u4f4f\u8bf4\u8bdd\u201d（Push-to-Talk）\u6a21\u5f0f\u53ef\u4ee5\u5b8c\u5168\u6d88\u9664VAD\u7b49\u5f85\u5ef6\u8fdf，\u4f46\u9700\u8981\u4fee\u6539UI\u4ea4\u4e92\u3002<\/p>\n

    \u4e94\u3001\u5185\u5b58\u5360\u7528\u76d1\u63a7\u4e0e\u4f18\u5316\u5efa\u8bae<\/h3>\n

    5.1 \u5185\u5b58\u5360\u7528\u6765\u6e90<\/h4>\n\n\u7ec4\u4ef6\u9884\u4f30\u5185\u5b58\u751f\u547d\u5468\u671f<\/tr>\n\n\n\n\n\n\n
    FlutterSpeechPlugin\u5b9e\u4f8b<\/td>\n<1 KB<\/td>\nApp\u751f\u547d\u5468\u671f<\/td>\n<\/tr>\n
    MethodChannel<\/td>\n~10 KB<\/td>\n\u5f15\u64ce\u7ed1\u5b9a\u671f\u95f4<\/td>\n<\/tr>\n
    SpeechRecognitionEngine<\/td>\n~5-20 MB<\/td>\nactivate\u5230destroy<\/td>\n<\/tr>\n
    \u97f3\u9891\u7f13\u51b2\u533a<\/td>\n~1-5 MB<\/td>\n\u8bc6\u522b\u671f\u95f4<\/td>\n<\/tr>\n
    \u7f51\u7edc\u8fde\u63a5<\/td>\n~100 KB<\/td>\n\u5728\u7ebf\u8bc6\u522b\u671f\u95f4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    5.2 \u5185\u5b58\u4f18\u5316\u7b56\u7565<\/h4>\n

    \u7b56\u75651：\u53ca\u65f6\u91ca\u653e\u5f15\u64ce<\/p>\n

    \u5982\u679c\u7528\u6237\u957f\u65f6\u95f4\u4e0d\u4f7f\u7528\u8bed\u97f3\u8bc6\u522b，\u53ef\u4ee5\u4e3b\u52a8\u91ca\u653e\u5f15\u64ce：<\/p>\n

    \/\/ \u9875\u9762\u4e0d\u53ef\u89c1\u65f6\u91ca\u653e\u5f15\u64ce<\/span>
    \n@override<\/span>
    \nvoid<\/span> didChangeAppLifecycleState<\/span>(<\/span>AppLifecycleState<\/span> state)<\/span> {<\/span>
    \n if<\/span> (<\/span>state ==<\/span> AppLifecycleState<\/span>.<\/span>paused)<\/span> {<\/span>
    \n \/\/ App\u8fdb\u5165\u540e\u53f0，\u91ca\u653e\u5f15\u64ce<\/span>
    \n _speech.<\/span>cancel<\/span>(<\/span>)<\/span>;<\/span>
    \n \/\/ \u53ef\u4ee5\u901a\u8fc7MethodChannel\u8c03\u7528destroy<\/span>
    \n }<\/span> else<\/span> if<\/span> (<\/span>state ==<\/span> AppLifecycleState<\/span>.<\/span>resumed)<\/span> {<\/span>
    \n \/\/ App\u56de\u5230\u524d\u53f0，\u6309\u9700\u91cd\u65b0activate<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    \u7b56\u75652：\u61d2\u52a0\u8f7d\u5f15\u64ce<\/p>\n

    \u4e0d\u5728App\u542f\u52a8\u65f6\u5c31activate，\u800c\u662f\u5728\u7528\u6237\u7b2c\u4e00\u6b21\u70b9\u51fbListen\u65f6\u624dactivate：<\/p>\n

    void<\/span> start<\/span>(<\/span>)<\/span> async<\/span> {<\/span>
    \n if<\/span> (<\/span>!<\/span>_speechRecognitionAvailable)<\/span> {<\/span>
    \n \/\/ \u9996\u6b21\u4f7f\u7528，\u5148activate<\/span>
    \n await<\/span> _speech.<\/span>activate<\/span>(<\/span>selectedLang.<\/span>code)<\/span>;<\/span>
    \n }<\/span>
    \n await<\/span> _speech.<\/span>listen<\/span>(<\/span>)<\/span>;<\/span>
    \n}<\/span><\/p>\n

    \u7b56\u75653：\u5f15\u64ce\u590d\u7528+\u8d85\u65f6\u91ca\u653e<\/p>\n

    \u590d\u7528\u5f15\u64ce\u4f46\u8bbe\u7f6e\u8d85\u65f6，\u957f\u65f6\u95f4\u4e0d\u7528\u5c31\u81ea\u52a8\u91ca\u653e：<\/p>\n

    Timer<\/span>?<\/span> _engineReleaseTimer;<\/span><\/p>\n

    void<\/span> resetEngineTimer<\/span>(<\/span>)<\/span> {<\/span>
    \n _engineReleaseTimer?<\/span>.<\/span>cancel<\/span>(<\/span>)<\/span>;<\/span>
    \n _engineReleaseTimer =<\/span> Timer<\/span>(<\/span>Duration<\/span>(<\/span>minutes:<\/span> 5<\/span>)<\/span>,<\/span> (<\/span>)<\/span> {<\/span>
    \n \/\/ 5\u5206\u949f\u6ca1\u4f7f\u7528，\u91ca\u653e\u5f15\u64ce<\/span>
    \n _activatedLocale =<\/span> null<\/span>;<\/span>
    \n \/\/ \u901a\u8fc7MethodChannel\u8c03\u7528destroy<\/span>
    \n }<\/span>)<\/span>;<\/span>
    \n}<\/span><\/p>\n

    5.3 \u5185\u5b58\u76d1\u63a7<\/h4>\n

    # \u67e5\u770bApp\u5185\u5b58\u4f7f\u7528<\/span>
    \nhdc shell hidumper -p <<\/span>pid><\/span> –mem<\/p>\n

    # \u6301\u7eed\u76d1\u63a7<\/span>
    \nwatch<\/span> -n 2<\/span> "hdc shell hidumper -p <pid> –mem | head -20"<\/span><\/p>\n

    \u5173\u6ce8\u4ee5\u4e0b\u6307\u6807：<\/p>\n

      \n
    • PSS（Proportional Set Size）：App\u5b9e\u9645\u5360\u7528\u7684\u7269\u7406\u5185\u5b58<\/li>\n
    • USS（Unique Set Size）：App\u72ec\u5360\u7684\u7269\u7406\u5185\u5b58<\/li>\n
    • RSS（Resident Set Size）：App\u7684\u5e38\u9a7b\u5185\u5b58<\/li>\n<\/ul>\n

      5.4 \u5185\u5b58\u6cc4\u6f0f\u68c0\u6d4b<\/h4>\n

      \u5982\u679c\u53cd\u590dactivate\/destroy\u540e\u5185\u5b58\u6301\u7eed\u589e\u957f，\u53ef\u80fd\u6709\u6cc4\u6f0f：<\/p>\n

      \u7b2c1\u6b21activate: PSS = 50 MB
      \n\u7b2c1\u6b21destroy: PSS = 45 MB (\u6b63\u5e38，\u6709\u4e9b\u7f13\u5b58)
      \n\u7b2c2\u6b21activate: PSS = 55 MB
      \n\u7b2c2\u6b21destroy: PSS = 50 MB (\u6b63\u5e38)
      \n\u7b2c3\u6b21activate: PSS = 60 MB
      \n\u7b2c3\u6b21destroy: PSS = 58 MB \u2190 \u5982\u679c\u6301\u7eed\u589e\u957f，\u53ef\u80fd\u6709\u6cc4\u6f0f<\/p>\n

      \u516d\u3001\u7efc\u5408\u4f18\u5316\u65b9\u6848<\/h3>\n

      6.1 \u4f18\u5316\u524d\u540e\u5bf9\u6bd4<\/h4>\n\n\u6307\u6807\u4f18\u5316\u524d\u4f18\u5316\u540e\u6539\u5584<\/tr>\n\n\n\n\n\n\n
      \u9996\u6b21\u8bc6\u522b\u5ef6\u8fdf<\/td>\n~3\u79d2<\/td>\n~3\u79d2<\/td>\n\u65e0（\u9996\u6b21\u65e0\u6cd5\u4f18\u5316）<\/td>\n<\/tr>\n
      \u540e\u7eed\u8bc6\u522b\u5ef6\u8fdf<\/td>\n~3\u79d2<\/td>\n<500ms<\/td>\n85%<\/td>\n<\/tr>\n
      VAD\u7b49\u5f85<\/td>\n3\u79d2<\/td>\n2\u79d2（\u573a\u666f\u5316）<\/td>\n33%<\/td>\n<\/tr>\n
      \u7a7a\u95f2\u5185\u5b58<\/td>\n20MB（\u5f15\u64ce\u5e38\u9a7b）<\/td>\n5MB（\u8d85\u65f6\u91ca\u653e）<\/td>\n75%<\/td>\n<\/tr>\n
      \u611f\u77e5\u5ef6\u8fdf<\/td>\n\u9ad8（\u7b49\u6700\u7ec8\u7ed3\u679c）<\/td>\n\u4f4e（\u5b9e\u65f6\u90e8\u5206\u7ed3\u679c）<\/td>\n\u663e\u8457<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      6.2 \u4f18\u5316\u4f18\u5148\u7ea7<\/h4>\n
    • \u5f15\u64ce\u590d\u7528（\u6536\u76ca\u6700\u5927，\u6539\u52a8\u6700\u5c0f）<\/li>\n
    • \u5b9e\u65f6\u663e\u793a\u90e8\u5206\u7ed3\u679c（flutter_speech\u5df2\u5b9e\u73b0）<\/li>\n
    • VAD\u53c2\u6570\u573a\u666f\u5316（\u6839\u636e\u4e1a\u52a1\u8c03\u6574）<\/li>\n
    • \u61d2\u52a0\u8f7d+\u8d85\u65f6\u91ca\u653e（\u51cf\u5c11\u5185\u5b58\u5360\u7528）<\/li>\n
    • \u6309\u4f4f\u8bf4\u8bdd\u6a21\u5f0f（\u6d88\u9664VAD\u5ef6\u8fdf，\u4f46\u9700\u6539UI）<\/li>\n

      \u603b\u7ed3<\/h3>\n

      \u672c\u6587\u8bb2\u89e3\u4e86flutter_speech\u7684\u6027\u80fd\u4f18\u5316\u5b9e\u8df5：<\/p>\n

    • \u5f15\u64ce\u590d\u7528：\u907f\u514d\u91cd\u590d\u521b\u5efa\u5f15\u64ce，\u54cd\u5e94\u65f6\u95f4\u4ece2\u79d2\u964d\u5230100ms<\/li>\n
    • VAD\u8c03\u4f18：\u6839\u636e\u573a\u666f\u8c03\u6574vadBegin\/vadEnd，\u5e73\u8861\u54cd\u5e94\u901f\u5ea6\u548c\u51c6\u786e\u6027<\/li>\n
    • \u97f3\u9891\u53c2\u6570：16kHz\/16bit\/mono\u662f\u6700\u4f73\u914d\u7f6e，\u4e0d\u9700\u8981\u66f4\u9ad8<\/li>\n
    • \u5ef6\u8fdf\u4f18\u5316：\u5b9e\u65f6\u90e8\u5206\u7ed3\u679c+\u624b\u52a8stop\u53ef\u4ee5\u663e\u8457\u51cf\u5c11\u611f\u77e5\u5ef6\u8fdf<\/li>\n
    • \u5185\u5b58\u7ba1\u7406：\u61d2\u52a0\u8f7d+\u8d85\u65f6\u91ca\u653e，\u51cf\u5c11\u7a7a\u95f2\u65f6\u7684\u5185\u5b58\u5360\u7528<\/li>\n

      \u4e0b\u4e00\u7bc7\u6211\u4eec\u8bb2\u5355\u5143\u6d4b\u8bd5\u4e0e\u96c6\u6210\u6d4b\u8bd5\u2014\u2014\u5982\u4f55\u9a8c\u8bc1flutter_speech\u7684\u6b63\u786e\u6027\u3002<\/p>\n

      \u5982\u679c\u8fd9\u7bc7\u6587\u7ae0\u5bf9\u4f60\u6709\u5e2e\u52a9，\u6b22\u8fce\u70b9\u8d5e\u3001\u6536\u85cf\u3001\u5173\u6ce8，\u4f60\u7684\u652f\u6301\u662f\u6211\u6301\u7eed\u521b\u4f5c\u7684\u52a8\u529b！<\/p>\n

      \n

      \u76f8\u5173\u8d44\u6e90：<\/p>\n

        \n
      • Core Speech Kit\u6027\u80fd\u6307\u5357<\/li>\n
      • OpenHarmony\u5185\u5b58\u7ba1\u7406<\/li>\n
      • VAD\u8bed\u97f3\u6d3b\u52a8\u68c0\u6d4b<\/li>\n
      • Flutter\u6027\u80fd\u6700\u4f73\u5b9e\u8df5<\/li>\n
      • flutter_speech OpenHarmony\u6e90\u7801<\/li>\n
      • \u5f00\u6e90\u9e3f\u8499\u8de8\u5e73\u53f0\u793e\u533a<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"

        \u524d\u8a00
        \n\u6b22\u8fce\u52a0\u5165\u5f00\u6e90\u9e3f\u8499\u8de8\u5e73\u53f0\u793e\u533a：https:\/\/openharmonycrossplatform.csdn.net
        \nflutter_speech\u7684\u6838\u5fc3\u529f\u80fd\u5df2\u7ecf\u8dd1\u901a\u4e86，\u4f46\\”\u80fd\u7528\\”\u548c\\”\u597d\u7528\\”\u4e4b\u95f4\u8fd8\u6709\u4e00\u6bb5\u8ddd\u79bb\u3002\u6027\u80fd\u4f18\u5316\u5c31\u662f\u7f29\u77ed\u8fd9\u6bb5\u8ddd\u79bb\u7684\u5173\u952e\u3002
        \n\u8bed\u97f3\u8bc6\u522b\u63d2\u4ef6\u7684\u6027\u80fd\u4e3b\u8981\u4f53\u73b0\u5728\u4e09\u4e2a\u65b9\u9762：\u54cd\u5e94\u901f\u5ea6（\u4ece\u70b9\u51fb\u5230\u5f00\u59cb\u8bc6\u522b\u7684\u5ef6\u8fdf）\u3001\u8bc6\u522b\u5ef6\u8fdf（\u4ece\u8bf4\u5b8c\u8bdd\u5230\u51fa\u7ed3\u679c\u7684\u65f6\u95f4）\u3001\u8d44\u6e90\u6d88\u8017（C<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[2878,56],"topic":[],"class_list":["post-76185","post","type-post","status-publish","format-standard","hentry","category-server","tag-flutter","tag-56"],"yoast_head":"\nFlutter\u4e09\u65b9\u5e93\u9002\u914dOpenHarmony\u3010flutter_speech\u3011\u2014 \u6027\u80fd\u4f18\u5316\u5b9e\u8df5 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/76185.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Flutter\u4e09\u65b9\u5e93\u9002\u914dOpenHarmony\u3010flutter_speech\u3011\u2014 \u6027\u80fd\u4f18\u5316\u5b9e\u8df5 - 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