HarmonyOS soundpool使用问题

现在需要实现点击按钮发出声音，当按钮点击很快的时候声音可以重叠于是用了soundpool但是出现错误”soundPool load failed and catch error is No such file or directory“。参考代码：

let soundPool: media.SoundPool; 
let audioRendererInfo: audio.AudioRendererInfo = { 
  usage: audio.StreamUsage.STREAM_USAGE_MUSIC, 
  rendererFlags: 1 
} 
media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => { 
  if (error) { 
    return; 
  } else { 
    let file: fs.File; 
    let soundID: number = 0; 
    let fileSize: number = 1; //通过fs.stat()获取size值 
    let uri: string = ""; 
    //获取fd的描述信息 
    fs.open('/assets/addsub.mp3', fs.OpenMode.READ_ONLY).then((file_: fs.File) => { 
      file = file_; 
      console.info("file fd: " + file.fd); 
      uri = 'fd://' + (file.fd).toString() 
      soundPool = soundPool_; 
      soundPool.load(uri).then((soundId: number) => { 
        console.info('soundPool load uri success'); 
        soundID = soundId; 
        console.info(`createSoundPool success`) 
        let playParameters: media.PlayParameters = { 
          loop: 1, // 循环4次 
          rate: audio.AudioRendererRate.RENDER_RATE_NORMAL, // 正常倍速 
          leftVolume: 0.5, // range = 0.0-1.0 
          rightVolume: 0.5, // range = 0.0-1.0 
          priority: 0, // 最低优先级 
        } 
        soundPool.play(soundId, playParameters).then((streamId: number) => { 
          console.info('play success'); 
        }, (err: BusinessError) => { 
          console.error('soundpool play failed and catch error is ' + err.message); 
        }); 
      }) 
    }, (err: BusinessError) => { 
      console.error('soundPool load failed and catch error is ' + err.message); 
    }); 
 
  } 
})1.
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HarmonyOS

Heiang

2024-08-14 16:23:31

浏览

回答 1

按赞同

按时间

put_get

看报错内容，初步判断是soundPool的文件路径没有找到，请检查一下soundPool文件的路径是否正确。

1、entry/src/main/ets/assets下的文件不能通过fs.open(’/assets/addsub.mp3’)获取到，可将需要的音频文件放到resources/rawfile目录或resources/resfile目录下，参考：https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V5/resource-categories-and-access-V5

2、rawfile目录下文件可通过

getContext(this).resourceManager.getRawFdSync(‘assets/addsub.mp3’)1.

获取RawFileDescriptor，通过

soundPool.load(fileDesc.fd,fileDesc.offset,fileDesc.length)1.

加载，且只能通过这种方式加载，不能通过uri的形式加载；

3、resfile目录下文件可通过

fs.open(getContext(this).resourceDir + ‘/assets/addsub.mp3’, fs.OpenMode.READ_ONLY)1.

方式获取到文件，通过

soundPool.load(‘fd://’ + (file.fd))1.

加载；

4、soundPool.load()的回调中并未真正加载成功，不能在load的回调中直接play，可以在media.createSoundPool()创建soundPool实例后，在soundPool实例的回调监听soundPool.on(‘loadComplete’)中调用play方法。参考demo如下：

import { media } from '@kit.MediaKit'; 
import { audio } from '@kit.AudioKit'; 
import { BusinessError } from '@kit.BasicServicesKit'; 
import { common } from '@kit.AbilityKit'; 
@Entry 
@Component 
struct BorderExample3 { 
  private context: common.UIAbilityContext = getContext(this) as common.UIAbilityContext; 
  build() { 
    Button("测试").onClick(() => { 
      let soundPool: media.SoundPool; 
      let audioRendererInfo: audio.AudioRendererInfo = { usage: audio.StreamUsage.STREAM_USAGE_MUSIC, rendererFlags: 1 } 
      media.createSoundPool(5, audioRendererInfo, (error: BusinessError, soundPool_: media.SoundPool) => { 
        if (error) { 
          return; 
        } else { 
          console.info(`createSoundPool success`) 
          this.setCallBack(soundPool_); 
          let file = this.context.resourceManager.getRawFdSync('assets/addsub.mp3'); 
          soundPool = soundPool_; 
          soundPool.load(file.fd, file.offset, file.length).then((soundId: number) => { 
            console.info('soundPool load uri success'); 
          }) 
        } 
      }) 
    }) 
  } 
  setCallBack(soundPool: media.SoundPool) { 
    soundPool.on('loadComplete', (soundId: number) => { 
      console.info('[SoundPoolDemo] loadComplete success，soundId：' + soundId); 
      let playParameters: media.PlayParameters = { 
        loop: 1, // 循环4次 
        rate: audio.AudioRendererRate.RENDER_RATE_NORMAL, // 正常倍速 
        leftVolume: 0.5, // range = 0.0-1.0 
        rightVolume: 0.5, // range = 0.0-1.0 
        priority: 0, // 最低优先级 
      } 
      soundPool.play(soundId, playParameters).then((streamId: number) => { 
        console.info('play success'); 
      }, (err: BusinessError) => { 
        console.error('soundpool play failed and catch error is ' + err.message); 
      }); 
    }); 
    soundPool.on('playFinished', () => { 
      console.info('[SoundPoolDemo] playFinished success'); 
    }); 
    soundPool.on('error', (error: BusinessError) => { 
      console.error(`error happened,and error is ${JSON.stringify(error)}`); 
    }); 
  } 
}1.
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2024-08-14 21:17:18

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