我的应用程序使用了 Android 提供的 TTS 功能，但是当我使用它时，它显示此错误提示失败：未绑定到 tts 引擎。
这是我的代码。请如果有人可以帮助我，我搜索了任何人面临的类似问题，但我没有找到解决方案。
public class WeatherMeActivity extends Activity implements TextToSpeech.OnInitListener{
private ProgressDialog pDialog;
private TextToSpeech tts;
// This code can be any value you want, its just a checksum.
private static final int MY_DATA_CHECK_CODE = 1234;
private static final String TAG = "Error";
/** Called when the activity is first created. */
static String stat_strCity = null;
static String stat_strCountry = null;
static String stat_strTempUnit = null;
static String stat_strTempValue = null;
static String stat_strHumidity = null;
static String stat_strText = null;;
static String stat_strCode = null;;
static String stat_strDate = null;;
static String stat_strVisi = null;
public String location="Jerusalem";
public String temperature;
public String humidityTitle;
public String humidityValue;
public String visiValue;
public String dateTime;
private static HttpURLConnection httpConnection;
private static final String URL_YAHOO_API_WEATHER = "http://weather.yahooapis.com/forecastrss?w=%s&u=c";
private static final String PARAM_YAHOO_LOCATION = "yweather:location";
private static final String PARAM_YAHOO_UNIT = "yweather:units";
private static final String PARAM_YAHOO_ATMOSPHERE = "yweather:atmosphere";
private static final String PARAM_YAHOO_CONDITION = "yweather:condition";
private static final String PARAM_YAHOO_VALUE = "yweather:wind";
/** Attribute city */
private static final String ATT_YAHOO_CITY = "city";
private static final String ATT_YAHOO_COUNTRY = "country";
private static final String ATT_YAHOO_TEMP_UNIT = "temperature";
private static final String ATT_YAHOO_HUMIDITY = "humidity";
private static final String ATT_YAHOO_TEXT = "text";
private static final String ATT_YAHOO_CODE = "code";
private static final String ATT_YAHOO_DATE = "date";
private static final String ATT_YAHOO_TEMP = "chill";
private static final String ATT_YAHOO_VISI = "visibility";
/** Image array */
public static final int[][] m_ImageArr = {
......
};
int nCode = 0;
/** Location */
TextView m_TextLocation;
/** Temperature */
TextView m_Temperature;
/** Humimidy */
TextView m_Humimidy;
/** State */
TextView m_Visibility;
/** Time */
TextView m_Date;
/** Icon */
ImageView m_WeatherIcon;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.e(TAG,"load main view done");
setContentView(R.layout.weather_layout);
tts = new TextToSpeech(this, this);
// Fire off an intent to check if a TTS engine is installed
Intent checkIntent = new Intent();
checkIntent.setAction(TextToSpeech.Engine.ACTION_CHECK_TTS_DATA);
startActivityForResult(checkIntent, MY_DATA_CHECK_CODE);
Log.e(TAG,"load main view");
// initializeView();
Log.e(TAG,"intialize view done");
m_TextLocation = (TextView)findViewById(R.id.location);
m_Temperature = (TextView)findViewById(R.id.temperature);
m_Humimidy = (TextView)findViewById(R.id.humidityValue);
m_Visibility = (TextView)findViewById(R.id.visiValue);
m_WeatherIcon = (ImageView) findViewById(R.id.weather_icon);
m_Date = (TextView)findViewById(R.id.dateTime);
Button lisAgain = (Button)findViewById(R.id.button1);
lisAgain.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
speakOut("you are in ");
}
});
new weatherGet().execute();
}
public void onStart() {
// TODO Auto-generated method stub
super.onStart();
Resources res = getResources();
String songsFound = res.getString(R.string.tts_on);
if( songsFound.equals("true"))
;//speakOut("you are in ");
}
ImageButton btn_map,btn_agenda,btn_weather,btn_trip;
public void onInit(int status) {
// TODO Auto-generated method stub
if (status == TextToSpeech.SUCCESS) {
int result = tts.setLanguage(Locale.US);
// tts.setPitch(5); // set pitch level
// tts.setSpeechRate(2); // set speech speed rate
if (result == TextToSpeech.LANG_MISSING_DATA
|| result == TextToSpeech.LANG_NOT_SUPPORTED) {
Log.e("TTS", "Language is not supported");
} else {
//speakOut("Tempreature is "+stat_strTempValue);
}
} else {
Log.e("TTS", "Initilization Failed");
}
}
private void speakOut(String text ) {
if( text !=null){
tts.speak(text, TextToSpeech.QUEUE_FLUSH, null);
}
}
private boolean initializeView(){
return true;
}
protected void onResume() {
super.onResume();
}
public static void parserYahooWeatherInfo(Document docWeather){
if (docWeather == null){
//Log.e(TAG,"Invalid doc weatehr");
// return null;
}
String strCity = null;
String strCountry = null;
String strTempUnit = null;
String strTempValue = null;
String strHumidity = null;
String strText = null;
String strCode = null;
String strDate = null;
String strVisi = null;
try {
Element root = docWeather.getDocumentElement();
root.normalize();
NamedNodeMap locationNode = root.getElementsByTagName(PARAM_YAHOO_LOCATION).item(0).getAttributes();
if (locationNode != null){
strCity = locationNode.getNamedItem(ATT_YAHOO_CITY).getNodeValue();
strCountry = locationNode.getNamedItem(ATT_YAHOO_COUNTRY).getNodeValue();
}
NamedNodeMap unitNode = root.getElementsByTagName(PARAM_YAHOO_UNIT).item(0).getAttributes();
if (unitNode != null){
strTempUnit = unitNode.getNamedItem(ATT_YAHOO_TEMP_UNIT).getNodeValue();
}
NamedNodeMap atmosNode = root.getElementsByTagName(PARAM_YAHOO_ATMOSPHERE).item(0).getAttributes();
if (atmosNode != null){
strHumidity = atmosNode.getNamedItem(ATT_YAHOO_HUMIDITY).getNodeValue();
strVisi = atmosNode.getNamedItem(ATT_YAHOO_VISI).getNodeValue();
}
NamedNodeMap conditionNode = root.getElementsByTagName(PARAM_YAHOO_CONDITION).item(0).getAttributes();
if (conditionNode != null){
strText = conditionNode.getNamedItem(ATT_YAHOO_TEXT).getNodeValue();
strCode = conditionNode.getNamedItem(ATT_YAHOO_CODE).getNodeValue();
strDate = conditionNode.getNamedItem(ATT_YAHOO_DATE).getNodeValue();
}
NamedNodeMap temNode = root.getElementsByTagName(PARAM_YAHOO_VALUE).item(0).getAttributes();
if (temNode != null){
strTempValue = temNode.getNamedItem(ATT_YAHOO_TEMP).getNodeValue();
}
} catch (Exception e){
// Log.e(TAG,"Something wroing with parser data");
//return null;
}
stat_strCity = strCity ;
stat_strCountry = strCountry ;
stat_strTempUnit =strTempUnit ;
stat_strTempValue = strTempValue;
stat_strHumidity = strHumidity ;
stat_strText = strText ;
stat_strCode = strCode ;
stat_strDate = strDate ;
stat_strVisi = strVisi ;
//return yahooWeatherInfo;
}
private static int getImageByCode(String strCode){
int nImageCode = R.drawable.a0;
if (strCode == null){
//Log.e(TAG,"Code is null");
return nImageCode;
}
int nCode = Integer.parseInt(strCode);
int nNumber= m_ImageArr.length;
for (int i=0; i < nNumber; i++){
if (nCode == m_ImageArr[i][1]){
return m_ImageArr[i][0];
}
}
return nImageCode;
}
public void onDestroy() {
// Don't forget to shutdown!
if (tts != null) {
tts.stop();
tts.shutdown();
}
super.onDestroy();
}
private static void requestConnectServer(String strURL) throws IOException {
strURL = "http://weather.yahooapis.com/forecastrss?w=1937180&u=c";
httpConnection = (HttpURLConnection)new URL(strURL).openConnection();
httpConnection.connect();
if(httpConnection.getResponseCode() != HttpURLConnection.HTTP_OK){
Log.e(TAG,"Something wrong with connection");
httpConnection.disconnect();
throw new IOException("Error in connection: "+ httpConnection.getResponseCode());
}
}
**************************************************************************/
private static void requestDisconnect(){
if(httpConnection != null){
httpConnection.disconnect();
}
}
public static Document getDocumentFromURL(String strURL) throws IOException {
/* Verify URL */
if (strURL == null){
Log.e(TAG,"Invalid input URL");
return null;
}
String strRegURL = String.format(URL_YAHOO_API_WEATHER, strURL);
System.out.println(strRegURL);
/* Connect to server */
requestConnectServer(strRegURL);
Log.e(TAG,"Connect server done");
/* Get data from server */
String strDocContent = getDataFromConnection();
Log.e(TAG,"getDataFromConnection done");
/* Close connection */
requestDisconnect();
Log.e(TAG,"requestDisconnect");
if (strDocContent == null){
Log.e(TAG,"Can not get xml content");
return null;
}
int strContentSize = strDocContent.length();
StringBuffer strBuff = new StringBuffer();
strBuff.setLength(strContentSize+1);
strBuff.append(strDocContent);
ByteArrayInputStream is = new ByteArrayInputStream(strDocContent.getBytes());
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db;
Document docData = null;
try {
db = dbf.newDocumentBuilder();
docData = db.parse(is);
} catch (Exception e) {
Log.e(TAG,"newDocumentBuilder");
return null;
}
return docData;
}
private static String getDataFromConnection() throws IOException {
if (httpConnection == null){
return null;
}
String strValue = null;
InputStream inputStream = httpConnection.getInputStream();
if (inputStream == null){
return null;
}
StringBuffer strBuf = new StringBuffer();
BufferedReader buffReader = new BufferedReader(new InputStreamReader(inputStream));
String strLine = "";
while ((strLine = buffReader.readLine()) != null){
strBuf.append(strLine+"\n");
strValue +=strLine+"\n";
}
/* Release resource to system */
buffReader.close();
inputStream.close();
return strBuf.toString();
}
class weatherGet extends AsyncTask<String, String, String> {
@Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
Document dd = null;
try {
dd = getDocumentFromURL(location);
} catch (IOException e) {
Log.e(TAG,"intialize view done 2");
// TODO Auto-generated catch block
e.printStackTrace();
}
parserYahooWeatherInfo(dd);
return null;
}
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(WeatherMeActivity.this);
pDialog.setMessage("Loading Weather Information. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
protected void onPostExecute(String file_url) {
pDialog.dismiss();
// updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
/**
* Updating parsed JSON data into ListView
* */
nCode = getImageByCode(stat_strCode);
m_WeatherIcon.setImageResource(nCode);
m_TextLocation.setText(stat_strCity);
m_Temperature.setText(stat_strTempValue);
m_Date.setText(stat_strDate);
m_Humimidy.setText(stat_strHumidity);
m_Visibility.setText(stat_strVisi);
speakOut("Tempreature is "+stat_strTempValue);
}
});
}
}
}