Pocketsphinx检测到关键字时启动操作

Question

我正在使用pocketsphinx来检测单词相机并启动相机应用程序。然而，一旦我说＆＃34;相机＆＃34;，虽然它打开相机，但屏幕开始闪烁（亮度增加和减少）和相机滞后。此外，按下后退按钮关闭相机后，相机应用程序将再次打开。我不明白这里有什么问题？

public class PocketSphinxActivity extends Activity implements
    RecognitionListener {


private static final String trigger = "camera";
//private static final String KWS_SEARCH="wakeup";

private SpeechRecognizer recognizer;
private HashMap<String, Integer> captions;

@Override
public void onCreate(Bundle state) {
    super.onCreate(state);



    new AsyncTask<Void, Void, Exception>() {
        @Override
        protected Exception doInBackground(Void... params) {
            try {
                Assets assets = new Assets(PocketSphinxActivity.this);
                File assetDir = assets.syncAssets();
                setupRecognizer(assetDir);

            } catch (IOException e) {
                return e;
            }
            return null;
        }

        @Override
        protected void onPostExecute(Exception result) {
            if (result != null) {
                result.printStackTrace();
            } else {
                recognizer.startListening(trigger);
            }
        }
    }.execute();
}

@Override
public void onBeginningOfSpeech() {
}

@Override
public void onPartialResult(Hypothesis hypothesis) {
    if (hypothesis == null)
        return;

    String text = hypothesis.getHypstr();
    if (text.equals(trigger)){
    Intent i=new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    if(i.resolveActivity(getPackageManager())!=null){
        startActivity(i);
    }
        finish();
    }
}

@Override
public void onResult(Hypothesis hypothesis) {
    //no use
}

@Override
public void onEndOfSpeech() {
}

@Override
public void onError(Exception error) {
    error.printStackTrace();
}

@Override
public void onTimeout() {
}

@Override
public void onDestroy() {
    super.onDestroy();
    recognizer.cancel();
    recognizer.shutdown();
}

private void setupRecognizer(File assetsDir) throws IOException{
    recognizer=defaultSetup()
            .setAcousticModel(new File(assetsDir, "en-us-ptm"))
            .setDictionary(new File(assetsDir, "cmudict-en-us.dict"))
            .setKeywordThreshold(1e-45f)
            .setBoolean("-allphone_ci", true)
            .getRecognizer();
    recognizer.addListener(this);
    recognizer.addKeyphraseSearch(trigger,"camera");
}

}