我目前正在忙于语音识别，我希望语音识别器能够永远地听我说话。该应用程序的目的是，它将等待特定关键字的语音：当用户说出此关键字时，该服务已准备好接收用户语音命令经过研究，我发现我们可以完成识别器监听的时间。通过这些常数：
顺便说一下，默认的识别器服务会监听大约10秒钟。 （谷歌api）
String EXTRA_SPEECH_INPUT_COMPLETE_SILENCE_LENGTH_MILLIS The amount of time that it should take after we stop hearing speech to consider the input complete.
String EXTRA_SPEECH_INPUT_MINIMUM_LENGTH_MILLIS The minimum length of an utterance.
String EXTRA_SPEECH_INPUT_POSSIBLY_COMPLETE_SILENCE_LENGTH_MILLIS The amount of time that it should take after we stop hearing speech to consider the input possibly complete.
http://java.llp2.dcc.ufmg.br/apiminer/docs/reference/android/speech/RecognizerIntent.html
这些是捆绑类的附加内容。
问题是，当我在我的代码中使用这些常量时，它不起作用。
这是我的代码：
intent.putExtra(RecognizerIntent.EXTRA_SPEECH_INPUT_MINIMUM_LENGTH_MILLIS, 5000);
intent.putExtra(RecognizerIntent.EXTRA_SPEECH_INPUT_COMPLETE_SILENCE_LENGTH_MILLIS, 5000);
intent.putExtra(RecognizerIntent.EXTRA_SPEECH_INPUT_POSSIBLY_COMPLETE_SILENCE_LENGTH_MILLIS, 5000);
识别器仍然会听我大约10秒，虽然我写了5000毫秒，如你所见。
你能想到这个问题吗？也许我不知道如何使用额外内容或者它是关于权限，也许它会跳过我的代码或者我应该添加一些其他代码。任何帮助都会得到满足。
编辑：这是我的完整代码：
VoiceRecognitionActivity.java
public class VoiceRecognitionActivity extends Activity implements
TextToSpeech.OnInitListener {
private static final int REQUEST_CODE = 1234;
private Button mTalkButton;
private ListView wordsList;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_voice_recognition);
mTalkButton = (Button) findViewById(R.id.talk_button);
wordsList = (ListView) findViewById(R.id.listView1);
// Disable button if no recognition service is present
PackageManager pm = getPackageManager();
List<ResolveInfo> activities = pm.queryIntentActivities(new Intent(
RecognizerIntent.ACTION_RECOGNIZE_SPEECH), 0);
if (activities.size() == 0) {
mTalkButton.setEnabled(false);
mTalkButton.setText("Recognizer not present");
} else {
mTalkButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(
RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
intent.putExtra(RecognizerIntent.EXTRA_PROMPT,
"Voice recognition Demo...");
String defaultLanguage = Locale
.getDefault().toString();
intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, Locale
.getDefault());
intent.putExtra(RecognizerIntent.EXTRA_SPEECH_INPUT_MINIMUM_LENGTH_MILLIS, 5000);
intent.putExtra(RecognizerIntent.EXTRA_SPEECH_INPUT_COMPLETE_SILENCE_LENGTH_MILLIS, 5000);
intent.putExtra(RecognizerIntent.EXTRA_SPEECH_INPUT_POSSIBLY_COMPLETE_SILENCE_LENGTH_MILLIS, 5000);
startActivityForResult(intent, REQUEST_CODE);
}
});
}
}
/**
* Handle the results from the voice recognition activity.
*/
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_CODE && resultCode == RESULT_OK) {
// Populate the wordsList with the String values the recognition
// engine thought it heard
ArrayList<String> matches = data
.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
wordsList.setAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, matches));
}
super.onActivityResult(requestCode, resultCode, data);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_voice_recognition, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
case R.id.menu_settings:
startActivity(new Intent(this, SettingsActivity.class));
return true;
default:
return super.onOptionsItemSelected(item);
}
}
@Override
public void onInit(int status) {
// TODO Auto-generated method stub
}
}
TTSUtils.java
公共类TTSUtils实现了TextToSpeech.OnInitListener {
private TextToSpeech mTts;
private static TTSUtils mInstance;
private Context mContext;
public static TTSUtils getInstance(Context c) {
if (mInstance == null) {
mInstance = new TTSUtils(c);
}
return mInstance;
}
private TTSUtils(Context c) {
mContext = c;
mTts = new TextToSpeech(mContext, this);
mInstance = this;
}
@Override
public void onInit(int status) {
// TODO Auto-generated method stub
}
public void destroyTTS() {
if (mTts != null) {
mTts.stop();
mTts.shutdown();
}
}
public int setLanguage(Locale l) {
return mTts.setLanguage(l);
}
public int speak(String s, int i, HashMap<String, String> h) {
return mTts.speak(s, i, h);
}
}
SettingsActivity.java
公共类SettingsActivity扩展了PreferenceActivity {
/**
* Determines whether to always show the simplified settings UI, where
* settings are presented in a single list. When false, settings are shown
* as a master/detail two-pane view on tablets. When true, a single pane is
* shown on tablets.
*/
private static final boolean ALWAYS_SIMPLE_PREFS = false;
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
setupSimplePreferencesScreen();
}
/**
* Shows the simplified settings UI if the device configuration if the
* device configuration dictates that a simplified, single-pane UI should be
* shown.
*/
private void setupSimplePreferencesScreen() {
if (!isSimplePreferences(this)) {
return;
}
// In the simplified UI, fragments are not used at all and we instead
// use the older PreferenceActivity APIs.
// Add 'general' preferences.
addPreferencesFromResource(R.xml.pref_general);
// Add 'notifications' preferences, and a corresponding header.
PreferenceCategory fakeHeader = new PreferenceCategory(this);
fakeHeader.setTitle(R.string.pref_header_notifications);
getPreferenceScreen().addPreference(fakeHeader);
addPreferencesFromResource(R.xml.pref_notification);
// Add 'data and sync' preferences, and a corresponding header.
fakeHeader = new PreferenceCategory(this);
fakeHeader.setTitle(R.string.pref_header_data_sync);
getPreferenceScreen().addPreference(fakeHeader);
addPreferencesFromResource(R.xml.pref_data_sync);
// Bind the summaries of EditText/List/Dialog/Ringtone preferences to
// their values. When their values change, their summaries are updated
// to reflect the new value, per the Android Design guidelines.
bindPreferenceSummaryToValue(findPreference("example_text"));
bindPreferenceSummaryToValue(findPreference("example_list"));
bindPreferenceSummaryToValue(findPreference("notifications_new_message_ringtone"));
bindPreferenceSummaryToValue(findPreference("sync_frequency"));
}
/** {@inheritDoc} */
@Override
public boolean onIsMultiPane() {
return isXLargeTablet(this) && !isSimplePreferences(this);
}
/**
* Helper method to determine if the device has an extra-large screen. For
* example, 10" tablets are extra-large.
*/
private static boolean isXLargeTablet(Context context) {
return (context.getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) >= Configuration.SCREENLAYOUT_SIZE_XLARGE;
}
/**
* Determines whether the simplified settings UI should be shown. This is
* true if this is forced via {@link #ALWAYS_SIMPLE_PREFS}, or the device
* doesn't have newer APIs like {@link PreferenceFragment}, or the device
* doesn't have an extra-large screen. In these cases, a single-pane
* "simplified" settings UI should be shown.
*/
private static boolean isSimplePreferences(Context context) {
return ALWAYS_SIMPLE_PREFS
|| Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB
|| !isXLargeTablet(context);
}
/** {@inheritDoc} */
@Override
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
public void onBuildHeaders(List<Header> target) {
if (!isSimplePreferences(this)) {
loadHeadersFromResource(R.xml.pref_headers, target);
}
}
/**
* A preference value change listener that updates the preference's summary
* to reflect its new value.
*/
private static Preference.OnPreferenceChangeListener sBindPreferenceSummaryToValueListener = new Preference.OnPreferenceChangeListener() {
@Override
public boolean onPreferenceChange(Preference preference, Object value) {
String stringValue = value.toString();
if (preference instanceof ListPreference) {
// For list preferences, look up the correct display value in
// the preference's 'entries' list.
ListPreference listPreference = (ListPreference) preference;
int index = listPreference.findIndexOfValue(stringValue);
// Set the summary to reflect the new value.
preference
.setSummary(index >= 0 ? listPreference.getEntries()[index]
: null);
} else if (preference instanceof RingtonePreference) {
// For ringtone preferences, look up the correct display value
// using RingtoneManager.
if (TextUtils.isEmpty(stringValue)) {
// Empty values correspond to 'silent' (no ringtone).
preference.setSummary(R.string.pref_ringtone_silent);
} else {
Ringtone ringtone = RingtoneManager.getRingtone(
preference.getContext(), Uri.parse(stringValue));
if (ringtone == null) {
// Clear the summary if there was a lookup error.
preference.setSummary(null);
} else {
// Set the summary to reflect the new ringtone display
// name.
String name = ringtone
.getTitle(preference.getContext());
preference.setSummary(name);
}
}
} else {
// For all other preferences, set the summary to the value's
// simple string representation.
preference.setSummary(stringValue);
}
return true;
}
};
/**
* Binds a preference's summary to its value. More specifically, when the
* preference's value is changed, its summary (line of text below the
* preference title) is updated to reflect the value. The summary is also
* immediately updated upon calling this method. The exact display format is
* dependent on the type of preference.
*
* @see #sBindPreferenceSummaryToValueListener
*/
private static void bindPreferenceSummaryToValue(Preference preference) {
// Set the listener to watch for value changes.
preference
.setOnPreferenceChangeListener(sBindPreferenceSummaryToValueListener);
// Trigger the listener immediately with the preference's
// current value.
sBindPreferenceSummaryToValueListener.onPreferenceChange(
preference,
PreferenceManager.getDefaultSharedPreferences(
preference.getContext()).getString(preference.getKey(),
""));
}
/**
* This fragment shows general preferences only. It is used when the
* activity is showing a two-pane settings UI.
*/
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
public static class GeneralPreferenceFragment extends PreferenceFragment {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.pref_general);
// Bind the summaries of EditText/List/Dialog/Ringtone preferences
// to their values. When their values change, their summaries are
// updated to reflect the new value, per the Android Design
// guidelines.
bindPreferenceSummaryToValue(findPreference("example_text"));
bindPreferenceSummaryToValue(findPreference("example_list"));
}
}
/**
* This fragment shows notification preferences only. It is used when the
* activity is showing a two-pane settings UI.
*/
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
public static class NotificationPreferenceFragment extends
PreferenceFragment {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.pref_notification);
// Bind the summaries of EditText/List/Dialog/Ringtone preferences
// to their values. When their values change, their summaries are
// updated to reflect the new value, per the Android Design
// guidelines.
bindPreferenceSummaryToValue(findPreference("notifications_new_message_ringtone"));
}
}
/**
* This fragment shows data and sync preferences only. It is used when the
* activity is showing a two-pane settings UI.
*/
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
public static class DataSyncPreferenceFragment extends PreferenceFragment {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.pref_data_sync);
// Bind the summaries of EditText/List/Dialog/Ringtone preferences
// to their values. When their values change, their summaries are
// updated to reflect the new value, per the Android Design
// guidelines.
bindPreferenceSummaryToValue(findPreference("sync_frequency"));
}
}
}
答案 0 :(得分：6)
这些参数在最近的Google搜索更新中停止了Jelly Bean设备的使用。我一直想提交关于if一段时间的错误报告。它们仍适用于ICS设备及其下方。
如果您希望在没有超时的情况下继续侦听关键字，则必须执行循环，从而在onPartialResults中检查关键字。如果调用Results并且未检测到关键字，则需要立即重新启动识别。
您需要处理silent death bug并将系统音频流静音为prevent the Jelly Bean beep sound。
这些问题使得实施非常混乱和令人沮丧。把它排除在谷歌....
答案 1 :(得分：1)
这项工作仅适用于果冻豆
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_CODE && resultCode == RESULT_OK) {
// Populate the wordsList with the String values the recognition
// engine thought it heard
ArrayList<String> matches = data
.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
wordsList.setAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, matches));
}
else {
finishActivity(REQUEST_CODE);
startAndroidVoiceRecognition();
}
super.onActivityResult(requestCode, resultCode, data);
}
public startAndroidVoiceRecognition()
{
Intent intent = new Intent(
RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
intent.putExtra(RecognizerIntent.EXTRA_PROMPT,
"Voice recognition Demo...");
String defaultLanguage = Locale
.getDefault().toString();
intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, Locale
.getDefault());
startActivityForResult(intent, REQUEST_CODE);
}