Android:录制音频，以便稍后将背景流转换为语音到文本？

import android.media.MediaRecorder;
import java.io.IOException;

public class AudioRecorder {
    private MediaRecorder mediaRecorder;
    private String outputFile;

    public void startRecording() {
        mediaRecorder = new MediaRecorder();
        mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
        mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);

        // 设置输出文件路径
        outputFile = "/path/to/output/file";
        mediaRecorder.setOutputFile(outputFile);

        try {
            mediaRecorder.prepare();
        } catch (IOException e) {
            e.printStackTrace();
        }

        mediaRecorder.start();
    }

    public void stopRecording() {
        if (mediaRecorder != null) {
            mediaRecorder.stop();
            mediaRecorder.release();
            mediaRecorder = null;
        }
    }
}

import android.content.Intent;
import android.speech.RecognizerIntent;
import android.speech.SpeechRecognizer;
import android.widget.Toast;
import java.util.ArrayList;

public class SpeechToText {
    private SpeechRecognizer speechRecognizer;
    private MainActivity mainActivity;

    public SpeechToText(MainActivity activity) {
        mainActivity = activity;
        speechRecognizer = SpeechRecognizer.createSpeechRecognizer(mainActivity);
        speechRecognizer.setRecognitionListener(new MyRecognitionListener());
    }

    public void startSpeechToText() {
        Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
        intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
        intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, "en-US");

        speechRecognizer.startListening(intent);
    }

    private class MyRecognitionListener extends RecognitionListener {
        // 实现识别回调方法
        // ...

        @Override
        public void onResults(Bundle results) {
            // 识别结果的处理
            ArrayList<String> texts = results.getStringArrayList(SpeechRecognizer.RESULTS_RECOGNITION);
            if (texts != null && texts.size() > 0) {
                String recognizedText = texts.get(0);
                Toast.makeText(mainActivity, recognizedText, Toast.LENGTH_SHORT).show();
            }
        }

        // 其他回调方法的实现
        // ...
    }
}

<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.INTERNET" />