HarmonyOS API：@ohos.multimedia.media (媒体服务)

import media from '@ohos.multimedia.media';
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let audioPlayer = media.createAudioPlayer();
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let videoPlayer

media.createVideoPlayer((error, video) => {
   if (video != null) {
       videoPlayer = video;
       console.info('video createVideoPlayer success');
   } else {
       console.info(`video createVideoPlayer fail, error:${error}`);
   }
});
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let videoPlayer

media.createVideoPlayer().then((video) => {
   if (video != null) {
       videoPlayer = video;
       console.info('video createVideoPlayer success');
   } else {
       console.info('video createVideoPlayer fail');
   }
}).catch((error) => {
   console.info(`video catchCallback, error:${error}`);
});
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let audioRecorder = media.createAudioRecorder();
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audioPlayer.on('play', () => {    //设置'play'事件回调
    console.log('audio play success');
});
audioPlayer.play();
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audioPlayer.on('pause', () => {    //设置'pause'事件回调
    console.log('audio pause success');
});
audioPlayer.pause();
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audioPlayer.on('stop', () => {    //设置'stop'事件回调
    console.log('audio stop success');
});
audioPlayer.stop();
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audioPlayer.on('reset', () => {    //设置'reset'事件回调
    console.log('audio reset success');
});
audioPlayer.reset();
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audioPlayer.on('timeUpdate', (seekDoneTime) => {    //设置'timeUpdate'事件回调
    if (seekDoneTime == null) {
        console.info('audio seek fail');
        return;
    }
    console.log('audio seek success. seekDoneTime: ' + seekDoneTime);
});
audioPlayer.seek(30000);    //seek到30000ms的位置
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audioPlayer.on('volumeChange', () => {    //设置'volumeChange'事件回调
    console.log('audio volumeChange success');
});
audioPlayer.setVolume(1);    //设置音量到100%
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audioPlayer.release();
audioPlayer = undefined;
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function printfDescription(obj) {
    for (let item in obj) {
        let property = obj[item];
        console.info('audio key is ' + item);
        console.info('audio value is ' + property);
    }
}

audioPlayer.getTrackDescription((error, arrList) => {
    if (arrList != null) {
        for (let i = 0; i < arrList.length; i++) {
            printfDescription(arrList[i]);
        }
    } else {
        console.log(`audio getTrackDescription fail, error:${error}`);
    }
});
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function printfDescription(obj) {
    for (let item in obj) {
        let property = obj[item];
        console.info('audio key is ' + item);
        console.info('audio value is ' + property);
    }
}
let arrayDescription = null
audioPlayer.getTrackDescription().then((arrList) => {
    if (arrList != null) {
        arrayDescription = arrList;
    } else {
        console.log('audio getTrackDescription fail');
    }
}).catch((error) => {
   console.info(`audio catchCallback, error:${error}`);
});

for (let i = 0; i < arrayDescription.length; i++) {
    printfDescription(arrayDescription[i]);
}
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audioPlayer.on('bufferingUpdate', (infoType, value) => {
    console.log('audio bufferingInfo type: ' + infoType);
    console.log('audio bufferingInfo value: ' + value);
});
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import fileio from '@ohos.fileio'

let audioPlayer = media.createAudioPlayer();  //创建一个音频播放实例
audioPlayer.on('dataLoad', () => {            //设置'dataLoad'事件回调，src属性设置成功后，触发此回调
    console.info('audio set source success');
    audioPlayer.play();                       //开始播放，并触发'play'事件回调
});
audioPlayer.on('play', () => {                //设置'play'事件回调
    console.info('audio play success');
    audioPlayer.seek(30000);                  //调用seek方法，并触发'timeUpdate'事件回调
});
audioPlayer.on('pause', () => {               //设置'pause'事件回调
    console.info('audio pause success');
    audioPlayer.stop();                       //停止播放，并触发'stop'事件回调
});
audioPlayer.on('reset', () => {               //设置'reset'事件回调
    console.info('audio reset success');
    audioPlayer.release();                    //释放播放实例资源
    audioPlayer = undefined;
});
audioPlayer.on('timeUpdate', (seekDoneTime) => {  //设置'timeUpdate'事件回调
    if (seekDoneTime == null) {
        console.info('audio seek fail');
        return;
    }
    console.info('audio seek success, and seek time is ' + seekDoneTime);
    audioPlayer.setVolume(0.5);                //设置音量为50%，并触发'volumeChange'事件回调
});
audioPlayer.on('volumeChange', () => {         //设置'volumeChange'事件回调
    console.info('audio volumeChange success');
    audioPlayer.pause();                       //暂停播放，并触发'pause'事件回调
});
audioPlayer.on('finish', () => {               //设置'finish'事件回调
    console.info('audio play finish');
    audioPlayer.stop();                        //停止播放，并触发'stop'事件回调
});
audioPlayer.on('error', (error) => {           //设置'error'事件回调
    console.info(`audio error called, error: ${error}`);
});

// 用户选择音频设置fd(本地播放)
let fdPath = 'fd://';
// path路径的码流可通过"hdc file send D:\xxx\01.mp3 /data/accounts/account_0/appdata" 命令，将其推送到设备上
let path = '/data/accounts/account_0/appdata/ohos.xxx.xxx.xxx/01.mp3';
fileio.open(path).then((fdValue) => {
   fdPath = fdPath + '' + fdValue;
   console.info('open fd success fd is' + fdPath);
}, (err) => {
   console.info('open fd failed err is' + err);
}).catch((err) => {
   console.info('open fd failed err is' + err);
});
audioPlayer.src = fdPath;  //设置src属性，并触发'dataLoad'事件回调
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audioPlayer.on('timeUpdate', (newTime) => {    //设置'timeUpdate'事件回调
    if (newTime == null) {
        console.info('audio timeUpadate fail');
        return;
    }
    console.log('audio timeUpadate success. seekDoneTime: ' + newTime);
});
audioPlayer.play();    //开始播放后，自动触发时间戳更新事件
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audioPlayer.on('error', (error) => {      //设置'error'事件回调
    console.info(`audio error called, error: ${error}`); 
});
audioPlayer.setVolume(3);  //设置volume为无效值，触发'error'事件
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