要避免未列出的识别,可以使用Pocketsphinx Android库。以下是使用Pocketsphinx进行语音识别的代码示例:
首先,确保已将Pocketsphinx库添加到Android项目中。
创建一个用于处理语音识别的类,例如SpeechRecognizer:
import edu.cmu.pocketsphinx.Assets;
import edu.cmu.pocketsphinx.Hypothesis;
import edu.cmu.pocketsphinx.RecognitionListener;
import edu.cmu.pocketsphinx.SpeechRecognizer;
import edu.cmu.pocketsphinx.SpeechRecognizerSetup;
public class SpeechRecognizer implements RecognitionListener {
private edu.cmu.pocketsphinx.SpeechRecognizer recognizer;
public void startListening() {
// 初始化Pocketsphinx语音识别器
try {
Assets assets = new Assets(context);
File assetDir = assets.syncAssets();
recognizer = SpeechRecognizerSetup.defaultSetup()
.setAcousticModel(new File(assetDir, "en-us-ptm"))
.setDictionary(new File(assetDir, "cmudict-en-us.dict"))
.getRecognizer();
recognizer.addListener(this);
// 添加自定义的关键词列表
File keywordFile = new File(assetDir, "keywords.txt");
recognizer.addKeyphraseSearch("keywords", keywordFile);
} catch (IOException e) {
e.printStackTrace();
}
// 开始监听语音输入
recognizer.startListening("keywords");
}
public void stopListening() {
// 停止语音识别
recognizer.stop();
recognizer.shutdown();
}
@Override
public void onBeginningOfSpeech() {
// 语音输入开始时的回调方法
}
@Override
public void onEndOfSpeech() {
// 语音输入结束时的回调方法
}
@Override
public void onPartialResult(Hypothesis hypothesis) {
// 部分识别结果的回调方法
if (hypothesis != null) {
String text = hypothesis.getHypstr();
// 处理识别结果
}
}
@Override
public void onResult(Hypothesis hypothesis) {
// 最终识别结果的回调方法
if (hypothesis != null) {
String text = hypothesis.getHypstr();
// 处理识别结果
}
}
@Override
public void onError(Exception e) {
// 识别过程中发生错误的回调方法
}
@Override
public void onTimeout() {
// 识别超时的回调方法
}
}
public class MainActivity extends AppCompatActivity {
private SpeechRecognizer speechRecognizer;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
speechRecognizer = new SpeechRecognizer();
speechRecognizer.startListening();
}
@Override
protected void onDestroy() {
super.onDestroy();
if (speechRecognizer != null) {
speechRecognizer.stopListening();
}
}
}
通过使用Pocketsphinx Android库,你可以指定要识别的关键词列表,从而避免未列出的识别。当Pocketsphinx识别到指定的关键词时,会调用相应的回调方法,你可以在这些方法中处理识别结果。