代码在这里。。打印了duration，真机预览，看输出
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相关文档
- wx.getBackgroundAudioManager: Mini Program/Development/Extended/API/To be adapted API summary/wx.getBackgroundAudioManager
- wx.getBackgroundAudioManager#Note: Mini Program/Development/Extended/API/To be adapted API summary/wx.getBackgroundAudioManager
- wx.getBackgroundAudioManager#Return value: Mini Program/Development/Extended/API/To be adapted API summary/wx.getBackgroundAudioManager
- wx.getBackgroundAudioManager#sample code: Mini Program/Development/Extended/API/To be adapted API summary/wx.getBackgroundAudioManager
- wx.getBackgroundAudioManager: 小程序/开发/API/媒体/背景音频/wx.getBackgroundAudioManager
你好，getBackgroundAudioManager可以获取duration，前提是播放或者暂停状态下才可以