blob: d76f08f4ea02314083199daa775ea02a5fe6bff1 [file] [log] [blame]
/*
* Copyright (C) 2009 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.settings;
import static android.provider.Settings.Secure.TTS_DEFAULT_COUNTRY;
import static android.provider.Settings.Secure.TTS_DEFAULT_LANG;
import static android.provider.Settings.Secure.TTS_DEFAULT_RATE;
import static android.provider.Settings.Secure.TTS_DEFAULT_SYNTH;
import static android.provider.Settings.Secure.TTS_DEFAULT_VARIANT;
import static android.provider.Settings.Secure.TTS_USE_DEFAULTS;
import android.app.AlertDialog;
import android.content.ActivityNotFoundException;
import android.content.ContentResolver;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.Preference.OnPreferenceClickListener;
import android.provider.Settings;
import android.provider.Settings.SettingNotFoundException;
import android.speech.tts.TextToSpeech;
import android.speech.tts.TextToSpeech.EngineInfo;
import android.speech.tts.TtsEngines;
import android.text.TextUtils;
import android.util.Log;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import java.util.StringTokenizer;
public class TextToSpeechSettings extends SettingsPreferenceFragment implements
Preference.OnPreferenceChangeListener, Preference.OnPreferenceClickListener,
TextToSpeech.OnInitListener {
private static final String TAG = "TextToSpeechSettings";
private static final String KEY_TTS_PLAY_EXAMPLE = "tts_play_example";
private static final String KEY_TTS_INSTALL_DATA = "tts_install_data";
private static final String KEY_TTS_USE_DEFAULT = "toggle_use_default_tts_settings";
private static final String KEY_TTS_DEFAULT_RATE = "tts_default_rate";
private static final String KEY_TTS_DEFAULT_LANG = "tts_default_lang";
private static final String KEY_TTS_DEFAULT_COUNTRY = "tts_default_country";
private static final String KEY_TTS_DEFAULT_VARIANT = "tts_default_variant";
private static final String KEY_TTS_DEFAULT_SYNTH = "tts_default_synth";
private static final String KEY_TTS_ENGINE_SETTINGS = "tts_engine_settings";
private static final String KEY_PLUGIN_ENABLED_PREFIX = "ENABLED_";
private static final String KEY_PLUGIN_SETTINGS_PREFIX = "SETTINGS_";
// TODO move default Locale values to TextToSpeech.Engine
private static final String DEFAULT_LANG_VAL = "eng";
private static final String DEFAULT_COUNTRY_VAL = "USA";
private static final String DEFAULT_VARIANT_VAL = "";
private static final String LOCALE_DELIMITER = "-";
private Preference mPlayExample = null;
private ListPreference mDefaultRatePref = null;
private ListPreference mDefaultLocPref = null;
private ListPreference mDefaultSynthPref = null;
private Preference mInstallData = null;
private Preference mEngineSettings = null;
private String mDefaultLanguage = null;
private String mDefaultCountry = null;
private String mDefaultLocVariant = null;
private int mDefaultRate = TextToSpeech.Engine.DEFAULT_RATE;
// Index of the current string to use for the demo.
private int mDemoStringIndex = 0;
private boolean mEnableDemo = false;
private boolean mVoicesMissing = false;
private TextToSpeech mTts = null;
private TtsEngines mEnginesHelper = null;
private boolean mTtsStarted = false;
/**
* Request code (arbitrary value) for voice data check through
* startActivityForResult.
*/
private static final int VOICE_DATA_INTEGRITY_CHECK = 1977;
private static final int GET_SAMPLE_TEXT = 1983;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.tts_settings);
getActivity().setVolumeControlStream(TextToSpeech.Engine.DEFAULT_STREAM);
mEnableDemo = false;
mTtsStarted = false;
Locale currentLocale = Locale.getDefault();
mDefaultLanguage = currentLocale.getISO3Language();
mDefaultCountry = currentLocale.getISO3Country();
mDefaultLocVariant = currentLocale.getVariant();
mPlayExample = findPreference(KEY_TTS_PLAY_EXAMPLE);
mPlayExample.setOnPreferenceClickListener(this);
mInstallData = findPreference(KEY_TTS_INSTALL_DATA);
mInstallData.setOnPreferenceClickListener(this);
mDefaultSynthPref = (ListPreference) findPreference(KEY_TTS_DEFAULT_SYNTH);
mDefaultRatePref = (ListPreference) findPreference(KEY_TTS_DEFAULT_RATE);
mDefaultLocPref = (ListPreference) findPreference(KEY_TTS_DEFAULT_LANG);
mEngineSettings = findPreference(KEY_TTS_ENGINE_SETTINGS);
mEngineSettings.setEnabled(false);
mTts = new TextToSpeech(getActivity().getApplicationContext(), this);
mEnginesHelper = new TtsEngines(getActivity().getApplicationContext());
initDefaultSettings();
initEngineSpecificSettings();
}
@Override
public void onStart() {
super.onStart();
if (mTtsStarted){
// whenever we return to this screen, we don't know the state of the
// system, so we have to recheck that we can play the demo, or it must be disabled.
// TODO make the TTS service listen to "changes in the system", i.e. sd card un/mount
updateWidgetState();
checkVoiceData();
}
}
@Override
public void onDestroy() {
super.onDestroy();
if (mTts != null) {
mTts.shutdown();
}
}
@Override
public void onPause() {
super.onPause();
if ((mDefaultRatePref != null) && (mDefaultRatePref.getDialog() != null)) {
mDefaultRatePref.getDialog().dismiss();
}
if ((mDefaultLocPref != null) && (mDefaultLocPref.getDialog() != null)) {
mDefaultLocPref.getDialog().dismiss();
}
if ((mDefaultSynthPref != null) && (mDefaultSynthPref.getDialog() != null)) {
mDefaultSynthPref.getDialog().dismiss();
}
}
private void initEngineSpecificSettings() {
final String engineName = mEnginesHelper.getDefaultEngine();
final EngineInfo engine = mEnginesHelper.getEngineInfo(engineName);
mEngineSettings.setTitle(getResources().getString(R.string.tts_engine_settings_title,
engine.label));
final Intent settingsIntent = mEnginesHelper.getSettingsIntent(engineName);
if (settingsIntent != null) {
mEngineSettings.setOnPreferenceClickListener(new OnPreferenceClickListener() {
public boolean onPreferenceClick(Preference preference) {
startActivity(settingsIntent);
return true;
}
});
mEngineSettings.setEnabled(true);
} else {
mEngineSettings.setEnabled(false);
}
}
private void initDefaultSettings() {
ContentResolver resolver = getContentResolver();
// Find the default TTS values in the settings, initialize and store the
// settings if they are not found.
// Default synthesis engine
loadEngines();
mDefaultSynthPref.setOnPreferenceChangeListener(this);
// Default rate
try {
mDefaultRate = Settings.Secure.getInt(resolver, TTS_DEFAULT_RATE);
} catch (SettingNotFoundException e) {
// default rate setting not found, initialize it
mDefaultRate = TextToSpeech.Engine.DEFAULT_RATE;
Settings.Secure.putInt(resolver, TTS_DEFAULT_RATE, mDefaultRate);
}
mDefaultRatePref.setValue(String.valueOf(mDefaultRate));
mDefaultRatePref.setOnPreferenceChangeListener(this);
// Default language / country / variant : these three values map to a single ListPref
// representing the matching Locale
initDefaultLang();
mDefaultLocPref.setOnPreferenceChangeListener(this);
}
/**
* Ask the current default engine to launch the matching CHECK_TTS_DATA activity
* to check the required TTS files are properly installed.
*/
private void checkVoiceData() {
String defaultEngine = mTts.getDefaultEngine();
if (TextUtils.isEmpty(defaultEngine)) return;
Intent intent = new Intent(TextToSpeech.Engine.ACTION_CHECK_TTS_DATA);
intent.setPackage(defaultEngine);
try {
Log.v(TAG, "Checking voice data: " + intent.toUri(0));
startActivityForResult(intent, VOICE_DATA_INTEGRITY_CHECK);
} catch (ActivityNotFoundException ex) {
Log.e(TAG, "Failed to check TTS data, no acitivty found for " + intent + ")");
}
}
/**
* Ask the current default engine to launch the matching INSTALL_TTS_DATA activity
* so the required TTS files are properly installed.
*/
private void installVoiceData() {
String defaultEngine = mTts.getDefaultEngine();
if (TextUtils.isEmpty(defaultEngine)) return;
Intent intent = new Intent(TextToSpeech.Engine.ACTION_INSTALL_TTS_DATA);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setPackage(defaultEngine);
try {
Log.v(TAG, "Installing voice data: " + intent.toUri(0));
startActivity(intent);
} catch (ActivityNotFoundException ex) {
Log.e(TAG, "Failed to install TTS data, no acitivty found for " + intent + ")");
}
}
/**
* Ask the current default engine to return a string of sample text to be
* spoken to the user.
*/
private void getSampleText() {
String defaultEngine = mTts.getDefaultEngine();
if (TextUtils.isEmpty(defaultEngine)) return;
Intent intent = new Intent(TextToSpeech.Engine.ACTION_GET_SAMPLE_TEXT);
intent.putExtra("language", mDefaultLanguage);
intent.putExtra("country", mDefaultCountry);
intent.putExtra("variant", mDefaultLocVariant);
intent.setPackage(defaultEngine);
try {
Log.v(TAG, "Getting sample text: " + intent.toUri(0));
startActivityForResult(intent, GET_SAMPLE_TEXT);
} catch (ActivityNotFoundException ex) {
Log.e(TAG, "Failed to get sample text, no acitivty found for " + intent + ")");
}
}
/**
* Called when the TTS engine is initialized.
*/
public void onInit(int status) {
if (status == TextToSpeech.SUCCESS) {
mEnableDemo = true;
if (mDefaultLanguage == null) {
mDefaultLanguage = Locale.getDefault().getISO3Language();
}
if (mDefaultCountry == null) {
mDefaultCountry = Locale.getDefault().getISO3Country();
}
if (mDefaultLocVariant == null) {
mDefaultLocVariant = new String();
}
mTts.setLanguage(new Locale(mDefaultLanguage, mDefaultCountry, mDefaultLocVariant));
updateWidgetState();
checkVoiceData();
mTtsStarted = true;
Log.v(TAG, "TTS engine for settings screen initialized.");
} else {
Log.v(TAG, "TTS engine for settings screen failed to initialize successfully.");
mEnableDemo = false;
}
updateWidgetState();
}
/**
* Called when voice data integrity check returns
*/
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == VOICE_DATA_INTEGRITY_CHECK) {
onVoiceDataIntegrityCheckDone(data);
} else if (requestCode == GET_SAMPLE_TEXT) {
onSampleTextReceived(resultCode, data);
}
}
private void onVoiceDataIntegrityCheckDone(Intent data) {
if (data == null){
Log.e(TAG, "TTS data check failed data = null");
// The CHECK_TTS_DATA activity for the plugin did not run properly;
// disable the preview and install controls and return.
mEnableDemo = false;
mVoicesMissing = false;
updateWidgetState();
return;
}
Log.v(TAG, "TTS data check completed, data = " + data.toUri(0));
ArrayList<String> available =
data.getStringArrayListExtra(TextToSpeech.Engine.EXTRA_AVAILABLE_VOICES);
ArrayList<String> unavailable =
data.getStringArrayListExtra(TextToSpeech.Engine.EXTRA_UNAVAILABLE_VOICES);
if (available == null || unavailable == null){
Log.e(TAG, "TTS data check failed (available == == null)");
// The CHECK_TTS_DATA activity for the plugin did not run properly;
// disable the preview and install controls and return.
mEnableDemo = false;
mVoicesMissing = false;
updateWidgetState();
return;
}
if (available.size() > 0){
if (mTts == null) {
mTts = new TextToSpeech(getActivity(), this);
}
updateDefaultLocPref(available);
mEnableDemo = true;
// Make sure that the default language can be used.
int languageResult = mTts.setLanguage(
new Locale(mDefaultLanguage, mDefaultCountry, mDefaultLocVariant));
if (languageResult < TextToSpeech.LANG_AVAILABLE){
Locale currentLocale = Locale.getDefault();
mDefaultLanguage = currentLocale.getISO3Language();
mDefaultCountry = currentLocale.getISO3Country();
mDefaultLocVariant = currentLocale.getVariant();
languageResult = mTts.setLanguage(
new Locale(mDefaultLanguage, mDefaultCountry, mDefaultLocVariant));
// If the default Locale isn't supported, just choose the first available
// language so that there is at least something.
if (languageResult < TextToSpeech.LANG_AVAILABLE){
parseLocaleInfo(mDefaultLocPref.getEntryValues()[0].toString());
mTts.setLanguage(
new Locale(mDefaultLanguage, mDefaultCountry, mDefaultLocVariant));
}
ContentResolver resolver = getContentResolver();
Settings.Secure.putString(resolver, TTS_DEFAULT_LANG, mDefaultLanguage);
Settings.Secure.putString(resolver, TTS_DEFAULT_COUNTRY, mDefaultCountry);
Settings.Secure.putString(resolver, TTS_DEFAULT_VARIANT, mDefaultLocVariant);
}
} else {
mEnableDemo = false;
}
if (unavailable.size() > 0){
mVoicesMissing = true;
} else {
mVoicesMissing = false;
}
updateWidgetState();
}
private void updateDefaultLocPref(ArrayList<String> availableLangs) {
CharSequence[] entries = new CharSequence[availableLangs.size()];
CharSequence[] entryValues = new CharSequence[availableLangs.size()];
int selectedLanguageIndex = -1;
String selectedLanguagePref = mDefaultLanguage;
if (mDefaultCountry.length() > 0) {
selectedLanguagePref = selectedLanguagePref + LOCALE_DELIMITER +
mDefaultCountry;
}
if (mDefaultLocVariant.length() > 0) {
selectedLanguagePref = selectedLanguagePref + LOCALE_DELIMITER +
mDefaultLocVariant;
}
for (int i = 0; i < availableLangs.size(); i++) {
String[] langCountryVariant = availableLangs.get(i).split("-");
Locale loc = null;
if (langCountryVariant.length == 1){
loc = new Locale(langCountryVariant[0]);
} else if (langCountryVariant.length == 2){
loc = new Locale(langCountryVariant[0], langCountryVariant[1]);
} else if (langCountryVariant.length == 3){
loc = new Locale(langCountryVariant[0], langCountryVariant[1],
langCountryVariant[2]);
}
if (loc != null){
entries[i] = loc.getDisplayName();
entryValues[i] = availableLangs.get(i);
if (entryValues[i].equals(selectedLanguagePref)) {
selectedLanguageIndex = i;
}
}
}
mDefaultLocPref.setEntries(entries);
mDefaultLocPref.setEntryValues(entryValues);
if (selectedLanguageIndex > -1) {
mDefaultLocPref.setValueIndex(selectedLanguageIndex);
}
}
private void onSampleTextReceived(int resultCode, Intent data) {
if (resultCode == TextToSpeech.LANG_AVAILABLE) {
String sample = getActivity().getString(R.string.tts_demo);
if (data != null && data.getStringExtra("sampleText") != null) {
sample = data.getStringExtra("sampleText");
}
Log.v(TAG, "Got sample text: " + sample);
if (mTts != null) {
mTts.speak(sample, TextToSpeech.QUEUE_FLUSH, null);
}
} else {
// TODO: Display an error here to the user.
Log.e(TAG, "Did not have a sample string for the requested language");
}
}
public boolean onPreferenceChange(Preference preference, Object objValue) {
if (KEY_TTS_USE_DEFAULT.equals(preference.getKey())) {
// "Use Defaults"
int value = ((Boolean) objValue) ? 1 : 0;
Settings.Secure.putInt(getContentResolver(), TTS_USE_DEFAULTS, value);
Log.i(TAG, "TTS 'use default' settings changed, now " + value);
} else if (KEY_TTS_DEFAULT_RATE.equals(preference.getKey())) {
// Default rate
mDefaultRate = Integer.parseInt((String) objValue);
try {
Settings.Secure.putInt(getContentResolver(), TTS_DEFAULT_RATE, mDefaultRate);
if (mTts != null) {
mTts.setSpeechRate(mDefaultRate / 100.0f);
}
Log.v(TAG, "TTS default rate changed, now " + mDefaultRate);
} catch (NumberFormatException e) {
Log.e(TAG, "could not persist default TTS rate setting", e);
}
} else if (KEY_TTS_DEFAULT_LANG.equals(preference.getKey())) {
// Default locale
ContentResolver resolver = getContentResolver();
parseLocaleInfo((String) objValue);
Settings.Secure.putString(resolver, TTS_DEFAULT_LANG, mDefaultLanguage);
Settings.Secure.putString(resolver, TTS_DEFAULT_COUNTRY, mDefaultCountry);
Settings.Secure.putString(resolver, TTS_DEFAULT_VARIANT, mDefaultLocVariant);
Log.v(TAG, "TTS default lang/country/variant set to "
+ mDefaultLanguage + "/" + mDefaultCountry + "/" + mDefaultLocVariant);
if (mTts != null) {
mTts.setLanguage(new Locale(mDefaultLanguage, mDefaultCountry, mDefaultLocVariant));
}
int newIndex = mDefaultLocPref.findIndexOfValue((String)objValue);
Log.v(TAG, " selected is " + newIndex);
mDemoStringIndex = newIndex > -1 ? newIndex : 0;
} else if (KEY_TTS_DEFAULT_SYNTH.equals(preference.getKey())) {
final String name = objValue.toString();
final EngineInfo info = mEnginesHelper.getEngineInfo(name);
if (info.system) {
// For system engines, do away with the alert dialog.
updateDefaultEngine(name);
initEngineSpecificSettings();
} else {
// For all other engines, display a warning message before
// turning them on.
displayDataAlert(preference, name);
}
// We'll deal with updating the UI ourselves.
return false;
}
return true;
}
/**
* Called when mPlayExample or mInstallData is clicked
*/
public boolean onPreferenceClick(Preference preference) {
if (preference == mPlayExample) {
// Get the sample text from the TTS engine; onActivityResult will do
// the actual speaking
getSampleText();
return true;
} else if (preference == mInstallData) {
installVoiceData();
// quit this activity so it needs to be restarted after installation of the voice data
finish();
return true;
}
return false;
}
private void updateWidgetState() {
mPlayExample.setEnabled(mEnableDemo);
mDefaultRatePref.setEnabled(mEnableDemo);
mDefaultLocPref.setEnabled(mEnableDemo);
mInstallData.setEnabled(mVoicesMissing);
}
private void parseLocaleInfo(String locale) {
StringTokenizer tokenizer = new StringTokenizer(locale, LOCALE_DELIMITER);
mDefaultLanguage = "";
mDefaultCountry = "";
mDefaultLocVariant = "";
if (locale != null) {
String[] components = locale.split(LOCALE_DELIMITER);
if (components.length > 0) {
mDefaultLanguage = components[0];
}
if (components.length > 1) {
mDefaultCountry = components[1];
}
if (components.length > 2) {
mDefaultLocVariant = components[2];
}
}
}
/**
* Initialize the default language in the UI and in the preferences.
* After this method has been invoked, the default language is a supported Locale.
*/
private void initDefaultLang() {
// if there isn't already a default language preference
if (!hasLangPref()) {
// if the current Locale is supported
if (isCurrentLocSupported()) {
// then use the current Locale as the default language
useCurrentLocAsDefault();
} else {
// otherwise use a default supported Locale as the default language
useSupportedLocAsDefault();
}
}
// Update the language preference list with the default language and the matching
// demo string (at this stage there is a default language pref)
ContentResolver resolver = getContentResolver();
mDefaultLanguage = Settings.Secure.getString(resolver, TTS_DEFAULT_LANG);
mDefaultCountry = Settings.Secure.getString(resolver, TTS_DEFAULT_COUNTRY);
mDefaultLocVariant = Settings.Secure.getString(resolver, TTS_DEFAULT_VARIANT);
// update the demo string
mDemoStringIndex = mDefaultLocPref.findIndexOfValue(mDefaultLanguage + LOCALE_DELIMITER
+ mDefaultCountry);
if (mDemoStringIndex > -1){
mDefaultLocPref.setValueIndex(mDemoStringIndex);
}
}
/**
* (helper function for initDefaultLang() )
* Returns whether there is a default language in the TTS settings.
*/
private boolean hasLangPref() {
ContentResolver resolver = getContentResolver();
String language = Settings.Secure.getString(resolver, TTS_DEFAULT_LANG);
if ((language == null) || (language.length() < 1)) {
return false;
}
String country = Settings.Secure.getString(resolver, TTS_DEFAULT_COUNTRY);
if (country == null) {
return false;
}
String variant = Settings.Secure.getString(resolver, TTS_DEFAULT_VARIANT);
if (variant == null) {
return false;
}
return true;
}
/**
* (helper function for initDefaultLang() )
* Returns whether the current Locale is supported by this Settings screen
*/
private boolean isCurrentLocSupported() {
String currentLocID = Locale.getDefault().getISO3Language() + LOCALE_DELIMITER
+ Locale.getDefault().getISO3Country();
return (mDefaultLocPref.findIndexOfValue(currentLocID) > -1);
}
/**
* (helper function for initDefaultLang() )
* Sets the default language in TTS settings to be the current Locale.
* This should only be used after checking that the current Locale is supported.
*/
private void useCurrentLocAsDefault() {
Locale currentLocale = Locale.getDefault();
ContentResolver resolver = getContentResolver();
Settings.Secure.putString(resolver, TTS_DEFAULT_LANG, currentLocale.getISO3Language());
Settings.Secure.putString(resolver, TTS_DEFAULT_COUNTRY, currentLocale.getISO3Country());
Settings.Secure.putString(resolver, TTS_DEFAULT_VARIANT, currentLocale.getVariant());
}
/**
* (helper function for initDefaultLang() )
* Sets the default language in TTS settings to be one known to be supported
*/
private void useSupportedLocAsDefault() {
ContentResolver resolver = getContentResolver();
Settings.Secure.putString(resolver, TTS_DEFAULT_LANG, DEFAULT_LANG_VAL);
Settings.Secure.putString(resolver, TTS_DEFAULT_COUNTRY, DEFAULT_COUNTRY_VAL);
Settings.Secure.putString(resolver, TTS_DEFAULT_VARIANT, DEFAULT_VARIANT_VAL);
}
private void loadEngines() {
List<EngineInfo> engines = mEnginesHelper.getEngines();
CharSequence entries[] = new CharSequence[engines.size()];
CharSequence values[] = new CharSequence[engines.size()];
final int count = engines.size();
for (int i = 0; i < count; ++i) {
final EngineInfo engine = engines.get(i);
entries[i] = engine.label;
values[i] = engine.name;
}
mDefaultSynthPref.setEntries(entries);
mDefaultSynthPref.setEntryValues(values);
// Set the selected engine based on the saved preference
String selectedEngine = Settings.Secure.getString(getContentResolver(), TTS_DEFAULT_SYNTH);
int selectedEngineIndex = mDefaultSynthPref.findIndexOfValue(selectedEngine);
if (selectedEngineIndex == -1){
selectedEngineIndex = mDefaultSynthPref.findIndexOfValue(
mEnginesHelper.getHighestRankedEngineName());
}
if (selectedEngineIndex >= 0) {
mDefaultSynthPref.setValueIndex(selectedEngineIndex);
}
}
private void displayDataAlert(Preference pref, final String key) {
Log.v(TAG, "Displaying data alert for :" + key);
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setTitle(android.R.string.dialog_alert_title);
builder.setIcon(android.R.drawable.ic_dialog_alert);
builder.setMessage(getActivity().getString(
R.string.tts_engine_security_warning, pref.getTitle()));
builder.setCancelable(true);
builder.setPositiveButton(android.R.string.ok,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
updateDefaultEngine(key);
loadEngines();
initEngineSpecificSettings();
}
});
builder.setNegativeButton(android.R.string.cancel, null);
AlertDialog dialog = builder.create();
dialog.show();
}
private void updateDefaultEngine(String engine) {
Log.v(TAG, "Updating default synth to : " + engine);
if (mTts != null) {
try {
mTts.shutdown();
mTts = null;
} catch (Exception e) {
Log.e(TAG, "Error shutting down TTS engine" + e);
}
}
mTts = new TextToSpeech(getActivity().getApplicationContext(), this, engine);
mEnableDemo = false;
mVoicesMissing = false;
// Persist this value to settings and update the UI before we check
// voice data because if the TTS class connected without any exception, "engine"
// will be the default engine irrespective of whether the voice check
// passes or not.
Settings.Secure.putString(getContentResolver(), TTS_DEFAULT_SYNTH, engine);
mDefaultSynthPref.setValue(engine);
updateWidgetState();
checkVoiceData();
Log.v(TAG, "The default synth is now: " + engine);
}
}