WeChat applet implements audio recording function

WeChat applet implements audio recording function

In recent years, with the development of the mobile Internet, the popularity of WeChat applet has become more and more widespread. As a lightweight, easy-to-use application, WeChat mini program plays an important role in helping companies expand their markets and improve user experience. In terms of implementing the audio recording function, the WeChat applet also provides a simple and easy-to-use interface and related code examples.

Implementing the audio recording function is mainly divided into three steps: first, obtain authorization, then create a recording manager, and finally start recording audio.

The first step is to obtain authorization. When calling the interface provided by WeChat in the WeChat applet, user authorization is required to access the microphone device. You can use the wx.getSetting interface to determine whether the user has been authorized. If so, start recording directly; if not, use the wx.authorize interface to initiate an authorization request to the user.

The specific code examples are as follows:

wx.getSetting({
  success(res) {
    if (!res.authSetting['scope.record']) {
      wx.authorize({
        scope: 'scope.record',
        success() {
          // 用户已经授权，可以开始录制
          startRecord();
        },
        fail() {
          // 用户拒绝授权，无法录制
          wx.showToast({
            title: '授权失败',
            icon: 'none',
          });
        },
      });
    } else {
      // 用户已经授权，可以开始录制
      startRecord();
    }
  },
});

The second step is to create a recording manager. In the applet, you can use the wx.getRecorderManager interface to create a recording manager, through which you can set recording parameters and monitor various recording events.

The specific code examples are as follows:

let recorderManager = wx.getRecorderManager();
recorderManager.onStart(() => {
  console.log('开始录音');
});
recorderManager.onStop((res) => {
  console.log('结束录音', res.tempFilePath);
});
recorderManager.onError((res) => {
  console.log('录音错误', res.errMsg);
});

The third step is to start recording audio. After the user is authorized, the recorderManager.start method can be called to start recording audio. After the recording is completed, you can end the recording through the recorderManager.stop method and obtain the temporary path of the recording file.

The specific code examples are as follows:

function startRecord() {
  recorderManager.start({
    duration: 60000, // 录音最长时长，单位：毫秒
    format: 'mp3', // 录音的格式，可以是'mp3'或'aac'等
  });
}

function stopRecord() {
  recorderManager.stop();
}

Through the above three steps, you can implement the audio recording function in the WeChat applet. When the user clicks the start recording button, an authorization prompt box will automatically pop up. If the user agrees to the authorization, they can start recording audio; when the user stops recording, the onStop event will be triggered, and the recording file can be processed in the event callback function.

It should be noted that in order to avoid leakage of user privacy, recording files are stored in the temporary folder of the WeChat applet and can only be used within the applet and cannot be directly accessed and shared.

To sum up, the WeChat applet provides convenient and simple interfaces and code examples, which can help developers quickly implement audio recording functions. Developers can adjust and process recording parameters and recording events according to their actual needs to achieve richer and more personalized audio recording functions.

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