有没有办法用 React Native 录制音频并将其存储为波形文件？

Question

当用户单击按钮时，应用程序应开始收听音频并在用户静音时停止录音（例如静音后 20 秒），现在以波形格式（例如：test.wav）存储该音频文件以进行反应本国的 ？

Answer 1

As you already know that there is no inbuilt feature to record audio in React Native, However you can always use third part Library/package. There are number of them available on NPM. Here is one of them react native audio record

 import AudioRecord from 'react-native-audio-record'; const options = { sampleRate: 16000, // default 44100 channels: 1, // 1 or 2, default 1 bitsPerSample: 16, // 8 or 16, default 16 audioSource: 6, // android only wavFile: 'test.wav' // default 'audio.wav' }; AudioRecord.init(options); //Start Recording AudioRecord.start(); //Stop Recording AudioRecord.stop();

Hope this help

Answer 2

If you are also interested in creating file from this recording in the user device, i recommend using react-native-audio i personally tried in android and it worked pretty smoothly, example of code:

/* on top of component:*/
import {AudioRecorder, AudioUtils} from 'react-native-audio';
/*all your other imports*/
class Example extends Component {
     constructor(props) {
         super(props);
         this.AudioRecorder = AudioRecorder
       }
     startRecord(){
         let folder =  AudioUtils.DocumentDirectoryPath;
         let audioPath = folder +'/myFile.wav';
         let options=   { SampleRate: 22050,
            Channels: 1,
            AudioQuality: "Low",
            AudioEncoding: "wav",
            MeteringEnabled: true,};
        this.AudioRecorder.prepareRecordingAtPath(audioPath,options).then(
              ((success)=>{ this.AudioRecorder.startRecording((success)=>{
                                 }).catch((err)=>{})
             }).catch(err=>{})


       }

      stopRecord(){
          this.audioRecorder.stop()
       }

 }

you will probably also need user permission to use the device microphone, for this i recommend react-native-permissions