HarmonyOS鸿蒙Next中如何监听到音频焦点的变化

HarmonyOS鸿蒙Next中如何监听到音频焦点的变化 如何监听到音频焦点的变化，App内需要监听音频焦点的变化后作出一些对应的响应？

试了以下的代码，createAudioCapturer方法调用时报错 code:6800301,message:system error

let audioStreamInfo: audio.AudioStreamInfo = {
  samplingRate: audio.AudioSamplingRate.SAMPLE_RATE_44100,
  channels: audio.AudioChannel.CHANNEL_2,
  sampleFormat: audio.AudioSampleFormat.SAMPLE_FORMAT_S16LE,
  encodingType: audio.AudioEncodingType.ENCODING_TYPE_RAW
}

let audioCapturerInfo: audio.AudioCapturerInfo = {
  source: audio.SourceType.SOURCE_TYPE_INVALID,
  capturerFlags: 0
}

let audioCapturerOptions: audio.AudioCapturerOptions = {
  streamInfo: audioStreamInfo,
  capturerInfo: audioCapturerInfo
}

audio.createAudioCapturer(audioCapturerOptions, (err, data) => {
  if (err) {
    console.error(`AudioCapturer Created : Error: ${err}`);
  } else {
    console.info('AudioCapturer Created : Success : SUCCESS');
    let audioCapturer = data;
    audioCapturer.on('audioInterrupt', (interruptEvent: audio.InterruptEvent) => {
      Logger.info('AudioCapturer', 'audioInterrupt' + JsonUtil.stringify(interruptEvent));

      if (interruptEvent.eventType === audio.InterruptType.INTERRUPT_TYPE_BEGIN &&
        interruptEvent.hintType === audio.InterruptHint.INTERRUPT_HINT_PAUSE) {
        //作出对应的响应
      }
    })
  }
});

更多关于HarmonyOS鸿蒙Next中如何监听到音频焦点的变化的实战教程也可以访问 https://www.itying.com/category-93-b0.html

3 回复

监听焦点使用的就是on(‘audioInterrupt’)事件，完整的音频渲染参考文档:

https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V5/using-audiorenderer-for-playback-V5#完整示例

更多关于HarmonyOS鸿蒙Next中如何监听到音频焦点的变化的实战系列教程也可以访问 https://www.itying.com/category-93-b0.html


在HarmonyOS鸿蒙Next中，监听音频焦点变化可以通过AudioManager类实现。首先，创建一个AudioManager实例，然后通过requestAudioFocus方法请求音频焦点。你可以通过实现AudioManager.OnAudioFocusChangeListener接口来监听音频焦点的变化。在这个接口的onAudioFocusChange方法中，你可以处理焦点变化的事件，例如焦点获得、焦点丢失等。具体代码如下：

import audio from '@ohos.multimedia.audio';

let audioManager = audio.getAudioManager();
let audioFocusListener = {
    onAudioFocusChange: (focusChange) => {
        switch (focusChange) {
            case audio.AudioFocusState.FOCUS_GAIN:
                // 处理获得音频焦点的逻辑
                break;
            case audio.AudioFocusState.FOCUS_LOSS:
                // 处理丢失音频焦点的逻辑
                break;
            case audio.AudioFocusState.FOCUS_LOSS_TRANSIENT:
                // 处理暂时丢失音频焦点的逻辑
                break;
            case audio.AudioFocusState.FOCUS_LOSS_TRANSIENT_CAN_DUCK:
                // 处理可以降低音量的暂时丢失音频焦点的逻辑
                break;
        }
    }
};

audioManager.requestAudioFocus(audioFocusListener, audio.AudioStreamType.MUSIC, audio.AudioFocusMode.GAIN);

在HarmonyOS鸿蒙Next中，可以通过实现AudioManager.AudioFocusListener接口来监听到音频焦点的变化。首先，获取AudioManager实例，然后创建一个AudioFocusListener对象，并通过requestAudioFocus方法请求音频焦点。当音频焦点发生变化时，系统会回调onAudioFocusChange方法，你可以在该方法中处理焦点变化的逻辑。

示例代码：

AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
AudioManager.AudioFocusListener focusListener = new AudioManager.AudioFocusListener() {
    @Override
    public void onAudioFocusChange(int focusChange) {
        // 处理音频焦点变化的逻辑
    }
};
audioManager.requestAudioFocus(focusListener, AudioManager.STREAM_MUSIC, AudioManager.AUDIOFOCUS_GAIN);

这样，当音频焦点发生变化时，onAudioFocusChange方法会被调用，你可以在其中进行相应的处理。

回到顶部