语音识别和文本语音转换

Question

我想开发一个实现语音识别的应用程序，然后使用text to speech引擎实现文本到语音。我在下面发布了代码。我使用了两个按钮，一个list view.One按钮用于语音识别，另一个用于文本到语音转换，列表视图用于两者(列表视图中的第一个按钮发布语音识别的结果，然后应用程序将从列表视图中读出单词)。当我触摸语音识别的按钮时，单词会张贴在我的列表视图中，但问题是，当我按下text to speech的按钮时，应用程序不会从列表视图中读回单词，而在我的logcat中，当我按下这个按钮时，我没有收到任何有关这方面的信息。下面是我的程序：

package rtv.rtv.rtv;

import android.app.Activity;
import android.os.Bundle;

import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.speech.RecognizerIntent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import java.util.ArrayList;
import java.util.List;
import android.speech.tts.TextToSpeech;
import android.speech.tts.TextToSpeech.OnInitListener;
import android.util.Log;

public class VoiceRecTextSpeech extends Activity implements OnClickListener,OnInitListener {
    private static final int VOICE_RECOGNITION_REQUEST_CODE = 1234;
    private ListView mList;

    private Button speakBtn = null;
    private static final int REQ_TTS_STATUS_CHECK = 0;
    private static final String TAG = "TTS Demo";
    private TextToSpeech mTts;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        // Button and ListView for Voice Recognition
        Button speakButton = (Button) findViewById(R.id.btn_speak);
        mList = (ListView) findViewById(R.id.list);

        //Button for Text to Speech
        speakBtn = (Button)findViewById(R.id.speak);

        // Check to see if a recognition activity is present
        PackageManager pm = getPackageManager();
        List<ResolveInfo> activities = pm.queryIntentActivities(
                new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH), 0);
        if (activities.size() != 0) {
            speakButton.setOnClickListener(this);
        } else {
            speakButton.setEnabled(false);
            speakButton.setText("Recognizer not present");
        }

        // Check to be sure that TTS exists and is okay to use
        Intent checkIntent = new Intent();
        checkIntent.setAction(TextToSpeech.Engine.ACTION_CHECK_TTS_DATA);
        startActivityForResult(checkIntent, REQ_TTS_STATUS_CHECK);
    }


        //Handle the click on the start recognition button and on text to speech button

        public void onClick(View v) {

        switch (v.getId()) {
        case R.id.btn_speak:
            startVoiceRecognitionActivity();
            break;
        case R.id.speak:
            mTts.speak(mList.toString(), TextToSpeech.QUEUE_ADD, null);
            break;

        }
        }

        //Fire an intent to start the speech recognition activity

        private void startVoiceRecognitionActivity() {
            Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
            intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
                    RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
            intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Speech recognition demo");
            startActivityForResult(intent, VOICE_RECOGNITION_REQUEST_CODE);
        }

        // Handle the results 

        @Override
        protected void onActivityResult(int requestCode, int resultCode, Intent data) {
            if (requestCode == VOICE_RECOGNITION_REQUEST_CODE && resultCode == RESULT_OK) {
                // Fill the list view with the strings the recognizer thought it could have heard
                ArrayList<String> matches = data.getStringArrayListExtra(
                        RecognizerIntent.EXTRA_RESULTS);
                mList.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,
                        matches));
            }

            super.onActivityResult(requestCode, resultCode, data);

            if (requestCode == REQ_TTS_STATUS_CHECK) {
                switch (resultCode) {
                case TextToSpeech.Engine.CHECK_VOICE_DATA_PASS:
                    // TTS is up and running
                    mTts = new TextToSpeech(this, this);
                    Log.v(TAG, "Pico is installed okay");
                    break;
                case TextToSpeech.Engine.CHECK_VOICE_DATA_BAD_DATA:
                case TextToSpeech.Engine.CHECK_VOICE_DATA_MISSING_DATA:
                case TextToSpeech.Engine.CHECK_VOICE_DATA_MISSING_VOLUME:
                    // missing data, install it
                    Log.v(TAG, "Need language stuff: " + resultCode);
                    Intent installIntent = new Intent();
                    installIntent.setAction(
                            TextToSpeech.Engine.ACTION_INSTALL_TTS_DATA);
                    startActivity(installIntent);
                    break;
                case TextToSpeech.Engine.CHECK_VOICE_DATA_FAIL:
                default:
                    Log.e(TAG, "Got a failure. TTS apparently not available");
                }
            }
            else {
                // Got something else
            }

        }

         @Override
            public void onInit(int status) {
                // Now that the TTS engine is ready, we enable the button
                if( status == TextToSpeech.SUCCESS) {
                    speakBtn.setEnabled(true);
                }
            }
            @Override
            public void onPause()
            {
                super.onPause();
                // if we're losing focus, stop talking
                if( mTts != null)
                    mTts.stop();
            }
            @Override
            public void onDestroy()
            {
                super.onDestroy();
                mTts.shutdown();
            }
}

下面是main.xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">

    <Button android:id="@+id/speak"
        android:layout_height="wrap_content"
        android:enabled="false" android:text="Text To Speech" android:layout_width="match_parent"/>

    <Button android:id="@+id/btn_speak"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" android:text="Speak for Voice Recognition"/>

    <ListView android:id="@+id/list"
        android:layout_width="match_parent"
        android:layout_height="0dip"
        android:layout_weight="1" />

    </LinearLayout>

谢谢！

Answer 1

您的TTS按钮没有注册onClickListener()。因此，启动TTS的代码永远不会被调用。是否确实要将ListView转换为字符串并将其传递给TTS引擎？更有可能的是，您希望将ListView适配器中的数据转换为字符串。

Answer 2

即使status == TextToSpeech.SUCCESS通过，也可能是语言数据不受支持。

在onInit()之后，您需要执行一些代码，如下所示：

public void onInit(Context context, TextToSpeech tts, Locale forLocale)
{
    Locale defaultOrPassedIn = forLocale;
    if (forLocale == null)
    {
        defaultOrPassedIn = Locale.getDefault();
    }
    // check if language is available
    switch (tts.isLanguageAvailable(defaultOrPassedIn))
    {
        case TextToSpeech.LANG_AVAILABLE:
        case TextToSpeech.LANG_COUNTRY_AVAILABLE:
        case TextToSpeech.LANG_COUNTRY_VAR_AVAILABLE:
            tts.setLanguage(defaultOrPassedIn);
            break;
        case TextToSpeech.LANG_MISSING_DATA:
            Log.d(TAG, "MISSING_DATA");
            // check if waiting....
            Intent installIntent = new Intent();
            installIntent
                    .setAction(TextToSpeech.Engine.ACTION_INSTALL_TTS_DATA);
            context.startActivity(installIntent);
            break;
        case TextToSpeech.LANG_NOT_SUPPORTED:
            Log.d(TAG, "NOT SUPPORTED");
            // report failure to the user
            break;
    }
}

Answer 3

你有没有确保它真的收到了结果？

在你的适配器中有一些元素吗？Debug from the starting ALWAYS.