android texttospeech如何實(shí)現(xiàn)語(yǔ)音識(shí)別

小樊
81
2024-11-20 12:03:40

Android TextToSpeech（TTS）庫(kù)本身并不提供語(yǔ)音識(shí)別功能。但是，您可以結(jié)合使用Android的語(yǔ)音識(shí)別服務(wù)來(lái)實(shí)現(xiàn)這個(gè)需求。以下是實(shí)現(xiàn)語(yǔ)音識(shí)別的步驟：

  1. 添加權(quán)限：在AndroidManifest.xml文件中添加以下權(quán)限：
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.INTERNET" />
  1. 檢查權(quán)限：在運(yùn)行時(shí)檢查用戶是否已授予這些權(quán)限。如果尚未授權(quán)，請(qǐng)請(qǐng)求用戶授權(quán)。
private static final int REQUEST_RECORD_AUDIO_PERMISSION = 200;

private void requestRecordAudioPermission() {
    if (ContextCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO)
            != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions(this,
                new String[]{Manifest.permission.RECORD_AUDIO},
                REQUEST_RECORD_AUDIO_PERMISSION);
    } else {
        startRecording();
    }
}

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    if (requestCode == REQUEST_RECORD_AUDIO_PERMISSION) {
        if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            startRecording();
        } else {
            Toast.makeText(this, "Permission denied. Could not record audio.", Toast.LENGTH_SHORT).show();
        }
    }
}
  1. 開始錄音：使用MediaRecorder類開始錄音。
private void startRecording() {
    MediaRecorder mediaRecorder = new MediaRecorder();
    mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
    mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
    mediaRecorder.setOutputFile("/sdcard/audio.3gp");

    try {
        mediaRecorder.prepare();
        mediaRecorder.start();
    } catch (IOException e) {
        e.printStackTrace();
    }
}
  1. 停止錄音：在適當(dāng)?shù)臅r(shí)候停止錄音，例如在用戶按下停止按鈕時(shí)。
private void stopRecording() {
    if (mediaRecorder != null) {
        mediaRecorder.stop();
        mediaRecorder.release();
        mediaRecorder = null;
    }
}
  1. 使用語(yǔ)音識(shí)別器：創(chuàng)建一個(gè)SpeechRecognizer實(shí)例并使用它來(lái)識(shí)別用戶的語(yǔ)音。
private SpeechRecognizer speechRecognizer;
private Intent speechRecognizerIntent;

private void initSpeechRecognizer() {
    speechRecognizer = SpeechRecognizer.createSpeechRecognizer(this);
    speechRecognizerIntent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
    speechRecognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
    speechRecognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, "en-US");
    speechRecognizerIntent.putExtra(RecognizerIntent.EXTRA_PARTIAL_RESULTS, true);
}
  1. 開始識(shí)別：開始語(yǔ)音識(shí)別并處理結(jié)果。
private void startVoiceRecognition() {
    speechRecognizer.startListening(speechRecognizerIntent);
}

private void stopVoiceRecognition() {
    if (speechRecognizer != null) {
        speechRecognizer.stopListening();
    }
}

@Override
public void onResults(Bundle results) {
    ArrayList<String> matches = results.getStringArrayList(SpeechRecognizer.RESULTS_RECOGNITION);
    if (matches != null && !matches.isEmpty()) {
        String recognizedText = matches.get(0);
        // 處理識(shí)別到的文本
    }
}
  1. 釋放資源：在不再需要語(yǔ)音識(shí)別器時(shí)，釋放相關(guān)資源。
private void releaseSpeechRecognizer() {
    if (speechRecognizer != null) {
        speechRecognizer.destroy();
        speechRecognizer = null;
    }
}

現(xiàn)在，您可以結(jié)合使用TextToSpeech和語(yǔ)音識(shí)別器來(lái)實(shí)現(xiàn)所需的功能。例如，您可以在用戶說(shuō)出某些關(guān)鍵詞時(shí)觸發(fā)語(yǔ)音識(shí)別，并根據(jù)識(shí)別到的內(nèi)容執(zhí)行相應(yīng)操作。

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