256 lines
10 KiB
Java
256 lines
10 KiB
Java
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.settings;
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import android.content.ComponentName;
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import android.content.Intent;
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import android.content.pm.PackageManager;
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import android.content.pm.ResolveInfo;
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import android.content.pm.ServiceInfo;
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import android.content.pm.PackageManager.NameNotFoundException;
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import android.content.res.Resources;
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import android.content.res.TypedArray;
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import android.content.res.XmlResourceParser;
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import android.preference.ListPreference;
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import android.preference.Preference;
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import android.preference.PreferenceCategory;
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import android.preference.PreferenceGroup;
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import android.preference.PreferenceScreen;
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import android.preference.Preference.OnPreferenceChangeListener;
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import android.provider.Settings;
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import android.speech.RecognitionService;
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import android.speech.tts.TtsEngines;
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import android.util.AttributeSet;
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import android.util.Log;
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import android.util.Xml;
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import java.io.IOException;
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import java.util.HashMap;
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import java.util.List;
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import org.xmlpull.v1.XmlPullParser;
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import org.xmlpull.v1.XmlPullParserException;
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/**
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* Settings screen for voice input/output.
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*/
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public class VoiceInputOutputSettings implements OnPreferenceChangeListener {
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private static final String TAG = "VoiceInputOutputSettings";
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private static final String KEY_VOICE_CATEGORY = "voice_category";
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private static final String KEY_RECOGNIZER = "recognizer";
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private static final String KEY_RECOGNIZER_SETTINGS = "recognizer_settings";
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private static final String KEY_TTS_SETTINGS = "tts_settings";
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private PreferenceGroup mParent;
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private PreferenceCategory mVoiceCategory;
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private ListPreference mRecognizerPref;
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private Preference mRecognizerSettingsPref;
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private Preference mTtsSettingsPref;
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private PreferenceScreen mSettingsPref;
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private final SettingsPreferenceFragment mFragment;
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private final TtsEngines mTtsEngines;
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private HashMap<String, ResolveInfo> mAvailableRecognizersMap;
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public VoiceInputOutputSettings(SettingsPreferenceFragment fragment) {
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mFragment = fragment;
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mTtsEngines = new TtsEngines(fragment.getPreferenceScreen().getContext());
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}
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public void onCreate() {
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mParent = mFragment.getPreferenceScreen();
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mVoiceCategory = (PreferenceCategory) mParent.findPreference(KEY_VOICE_CATEGORY);
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mRecognizerPref = (ListPreference) mVoiceCategory.findPreference(KEY_RECOGNIZER);
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mRecognizerSettingsPref = mVoiceCategory.findPreference(KEY_RECOGNIZER_SETTINGS);
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mTtsSettingsPref = mVoiceCategory.findPreference(KEY_TTS_SETTINGS);
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mRecognizerPref.setOnPreferenceChangeListener(this);
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mSettingsPref = (PreferenceScreen)
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mVoiceCategory.findPreference(KEY_RECOGNIZER_SETTINGS);
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mAvailableRecognizersMap = new HashMap<String, ResolveInfo>();
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populateOrRemovePreferences();
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}
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private void populateOrRemovePreferences() {
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boolean hasRecognizerPrefs = populateOrRemoveRecognizerPrefs();
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boolean hasTtsPrefs = populateOrRemoveTtsPrefs();
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if (!hasRecognizerPrefs && !hasTtsPrefs) {
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// There were no TTS settings and no recognizer settings,
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// so it should be safe to hide the preference category
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// entirely.
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mFragment.getPreferenceScreen().removePreference(mVoiceCategory);
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}
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}
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private boolean populateOrRemoveRecognizerPrefs() {
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List<ResolveInfo> availableRecognitionServices =
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mFragment.getPackageManager().queryIntentServices(
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new Intent(RecognitionService.SERVICE_INTERFACE),
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PackageManager.GET_META_DATA);
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int numAvailable = availableRecognitionServices.size();
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if (numAvailable == 0) {
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mVoiceCategory.removePreference(mRecognizerPref);
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mVoiceCategory.removePreference(mRecognizerSettingsPref);
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return false;
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}
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if (numAvailable == 1) {
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// Only one recognizer available, so don't show the list of choices, but do
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// set up the link to settings for the available recognizer.
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mVoiceCategory.removePreference(mRecognizerPref);
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// But first set up the available recognizers map with just the one recognizer.
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ResolveInfo resolveInfo = availableRecognitionServices.get(0);
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String recognizerComponent =
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new ComponentName(resolveInfo.serviceInfo.packageName,
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resolveInfo.serviceInfo.name).flattenToShortString();
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mAvailableRecognizersMap.put(recognizerComponent, resolveInfo);
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String currentSetting = Settings.Secure.getString(
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mFragment.getContentResolver(), Settings.Secure.VOICE_RECOGNITION_SERVICE);
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updateSettingsLink(currentSetting);
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} else {
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// Multiple recognizers available, so show the full list of choices.
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populateRecognizerPreference(availableRecognitionServices);
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}
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// In this case, there was at least one available recognizer so
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// we populated the settings.
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return true;
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}
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private boolean populateOrRemoveTtsPrefs() {
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if (mTtsEngines.getEngines().isEmpty()) {
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mVoiceCategory.removePreference(mTtsSettingsPref);
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return false;
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}
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return true;
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}
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private void populateRecognizerPreference(List<ResolveInfo> recognizers) {
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int size = recognizers.size();
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CharSequence[] entries = new CharSequence[size];
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CharSequence[] values = new CharSequence[size];
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// Get the current value from the secure setting.
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String currentSetting = Settings.Secure.getString(
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mFragment.getContentResolver(), Settings.Secure.VOICE_RECOGNITION_SERVICE);
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// Iterate through all the available recognizers and load up their info to show
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// in the preference. Also build up a map of recognizer component names to their
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// ResolveInfos - we'll need that a little later.
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for (int i = 0; i < size; i++) {
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ResolveInfo resolveInfo = recognizers.get(i);
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String recognizerComponent =
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new ComponentName(resolveInfo.serviceInfo.packageName,
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resolveInfo.serviceInfo.name).flattenToShortString();
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mAvailableRecognizersMap.put(recognizerComponent, resolveInfo);
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entries[i] = resolveInfo.loadLabel(mFragment.getPackageManager());
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values[i] = recognizerComponent;
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}
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mRecognizerPref.setEntries(entries);
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mRecognizerPref.setEntryValues(values);
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mRecognizerPref.setDefaultValue(currentSetting);
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mRecognizerPref.setValue(currentSetting);
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updateSettingsLink(currentSetting);
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}
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private void updateSettingsLink(String currentSetting) {
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ResolveInfo currentRecognizer = mAvailableRecognizersMap.get(currentSetting);
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ServiceInfo si = currentRecognizer.serviceInfo;
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XmlResourceParser parser = null;
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String settingsActivity = null;
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try {
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parser = si.loadXmlMetaData(mFragment.getPackageManager(),
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RecognitionService.SERVICE_META_DATA);
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if (parser == null) {
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throw new XmlPullParserException("No " + RecognitionService.SERVICE_META_DATA +
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" meta-data for " + si.packageName);
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}
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Resources res = mFragment.getPackageManager().getResourcesForApplication(
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si.applicationInfo);
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AttributeSet attrs = Xml.asAttributeSet(parser);
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int type;
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while ((type=parser.next()) != XmlPullParser.END_DOCUMENT
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&& type != XmlPullParser.START_TAG) {
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}
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String nodeName = parser.getName();
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if (!"recognition-service".equals(nodeName)) {
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throw new XmlPullParserException(
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"Meta-data does not start with recognition-service tag");
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}
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TypedArray array = res.obtainAttributes(attrs,
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com.android.internal.R.styleable.RecognitionService);
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settingsActivity = array.getString(
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com.android.internal.R.styleable.RecognitionService_settingsActivity);
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array.recycle();
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} catch (XmlPullParserException e) {
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Log.e(TAG, "error parsing recognition service meta-data", e);
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} catch (IOException e) {
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Log.e(TAG, "error parsing recognition service meta-data", e);
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} catch (NameNotFoundException e) {
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Log.e(TAG, "error parsing recognition service meta-data", e);
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} finally {
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if (parser != null) parser.close();
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}
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if (settingsActivity == null) {
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// No settings preference available - hide the preference.
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Log.w(TAG, "no recognizer settings available for " + si.packageName);
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mSettingsPref.setIntent(null);
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mVoiceCategory.removePreference(mSettingsPref);
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} else {
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Intent i = new Intent(Intent.ACTION_MAIN);
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i.setComponent(new ComponentName(si.packageName, settingsActivity));
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mSettingsPref.setIntent(i);
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mRecognizerPref.setSummary(currentRecognizer.loadLabel(mFragment.getPackageManager()));
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}
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}
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public boolean onPreferenceChange(Preference preference, Object newValue) {
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if (preference == mRecognizerPref) {
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String setting = (String) newValue;
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// Put the new value back into secure settings.
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Settings.Secure.putString(mFragment.getContentResolver(),
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Settings.Secure.VOICE_RECOGNITION_SERVICE,
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setting);
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// Update the settings item so it points to the right settings.
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updateSettingsLink(setting);
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}
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return true;
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}
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}
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