637 lines
23 KiB
Java
637 lines
23 KiB
Java
/*
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* Copyright (C) 2011 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.tts;
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import static android.provider.Settings.Secure.TTS_DEFAULT_RATE;
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import static android.provider.Settings.Secure.TTS_DEFAULT_SYNTH;
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import com.android.settings.R;
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import com.android.settings.SettingsActivity;
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import com.android.settings.SettingsPreferenceFragment;
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import com.android.settings.tts.TtsEnginePreference.RadioButtonGroupState;
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import android.app.AlertDialog;
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import android.content.ActivityNotFoundException;
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import android.content.ContentResolver;
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import android.content.Intent;
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import android.os.Bundle;
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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.provider.Settings.SettingNotFoundException;
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import android.speech.tts.TextToSpeech;
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import android.speech.tts.UtteranceProgressListener;
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import android.speech.tts.TextToSpeech.EngineInfo;
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import android.speech.tts.TtsEngines;
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import android.text.TextUtils;
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import android.util.Log;
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import android.widget.Checkable;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Locale;
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import java.util.MissingResourceException;
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import java.util.Objects;
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import java.util.Set;
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public class TextToSpeechSettings extends SettingsPreferenceFragment implements
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Preference.OnPreferenceChangeListener, Preference.OnPreferenceClickListener,
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RadioButtonGroupState {
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private static final String TAG = "TextToSpeechSettings";
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private static final boolean DBG = false;
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/** Preference key for the "play TTS example" preference. */
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private static final String KEY_PLAY_EXAMPLE = "tts_play_example";
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/** Preference key for the TTS rate selection dialog. */
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private static final String KEY_DEFAULT_RATE = "tts_default_rate";
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/** Preference key for the TTS status field. */
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private static final String KEY_STATUS = "tts_status";
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/**
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* Preference key for the engine selection preference.
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*/
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private static final String KEY_ENGINE_PREFERENCE_SECTION =
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"tts_engine_preference_section";
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/**
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* These look like birth years, but they aren't mine. I'm much younger than this.
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*/
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private static final int GET_SAMPLE_TEXT = 1983;
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private static final int VOICE_DATA_INTEGRITY_CHECK = 1977;
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private PreferenceCategory mEnginePreferenceCategory;
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private ListPreference mDefaultRatePref;
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private Preference mPlayExample;
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private Preference mEngineStatus;
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private int mDefaultRate = TextToSpeech.Engine.DEFAULT_RATE;
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/**
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* The currently selected engine.
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*/
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private String mCurrentEngine;
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/**
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* The engine checkbox that is currently checked. Saves us a bit of effort
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* in deducing the right one from the currently selected engine.
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*/
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private Checkable mCurrentChecked;
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/**
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* The previously selected TTS engine. Useful for rollbacks if the users
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* choice is not loaded or fails a voice integrity check.
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*/
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private String mPreviousEngine;
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private TextToSpeech mTts = null;
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private TtsEngines mEnginesHelper = null;
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private String mSampleText = null;
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/**
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* Default locale used by selected TTS engine, null if not connected to any engine.
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*/
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private Locale mCurrentDefaultLocale;
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/**
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* List of available locals of selected TTS engine, as returned by
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* {@link TextToSpeech.Engine#ACTION_CHECK_TTS_DATA} activity. If empty, then activity
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* was not yet called.
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*/
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private List<String> mAvailableStrLocals;
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/**
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* The initialization listener used when we are initalizing the settings
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* screen for the first time (as opposed to when a user changes his choice
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* of engine).
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*/
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private final TextToSpeech.OnInitListener mInitListener = new TextToSpeech.OnInitListener() {
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@Override
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public void onInit(int status) {
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onInitEngine(status);
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}
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};
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/**
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* The initialization listener used when the user changes his choice of
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* engine (as opposed to when then screen is being initialized for the first
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* time).
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*/
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private final TextToSpeech.OnInitListener mUpdateListener = new TextToSpeech.OnInitListener() {
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@Override
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public void onInit(int status) {
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onUpdateEngine(status);
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}
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};
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@Override
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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addPreferencesFromResource(R.xml.tts_settings);
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getActivity().setVolumeControlStream(TextToSpeech.Engine.DEFAULT_STREAM);
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mPlayExample = findPreference(KEY_PLAY_EXAMPLE);
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mPlayExample.setOnPreferenceClickListener(this);
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mPlayExample.setEnabled(false);
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mEnginePreferenceCategory = (PreferenceCategory) findPreference(
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KEY_ENGINE_PREFERENCE_SECTION);
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mDefaultRatePref = (ListPreference) findPreference(KEY_DEFAULT_RATE);
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mEngineStatus = findPreference(KEY_STATUS);
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updateEngineStatus(R.string.tts_status_checking);
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mTts = new TextToSpeech(getActivity().getApplicationContext(), mInitListener);
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mEnginesHelper = new TtsEngines(getActivity().getApplicationContext());
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setTtsUtteranceProgressListener();
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initSettings();
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// Prevent restarting the TTS connection on rotation
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setRetainInstance(true);
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}
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@Override
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public void onResume() {
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super.onResume();
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if (mTts == null || mCurrentDefaultLocale == null) {
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return;
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}
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Locale ttsDefaultLocale = mTts.getDefaultLanguage();
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if (mCurrentDefaultLocale != null && !mCurrentDefaultLocale.equals(ttsDefaultLocale)) {
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updateWidgetState(false);
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checkDefaultLocale();
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}
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}
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private void setTtsUtteranceProgressListener() {
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if (mTts == null) {
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return;
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}
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mTts.setOnUtteranceProgressListener(new UtteranceProgressListener() {
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@Override
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public void onStart(String utteranceId) {}
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@Override
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public void onDone(String utteranceId) {}
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@Override
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public void onError(String utteranceId) {
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Log.e(TAG, "Error while trying to synthesize sample text");
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}
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});
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}
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@Override
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public void onDestroy() {
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super.onDestroy();
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if (mTts != null) {
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mTts.shutdown();
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mTts = null;
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}
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}
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private void initSettings() {
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final ContentResolver resolver = getContentResolver();
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// Set up the default rate.
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try {
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mDefaultRate = android.provider.Settings.Secure.getInt(resolver, TTS_DEFAULT_RATE);
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} catch (SettingNotFoundException e) {
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// Default rate setting not found, initialize it
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mDefaultRate = TextToSpeech.Engine.DEFAULT_RATE;
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}
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mDefaultRatePref.setValue(String.valueOf(mDefaultRate));
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mDefaultRatePref.setOnPreferenceChangeListener(this);
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mCurrentEngine = mTts.getCurrentEngine();
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SettingsActivity activity = null;
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if (getActivity() instanceof SettingsActivity) {
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activity = (SettingsActivity) getActivity();
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} else {
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throw new IllegalStateException("TextToSpeechSettings used outside a " +
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"Settings");
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}
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mEnginePreferenceCategory.removeAll();
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List<EngineInfo> engines = mEnginesHelper.getEngines();
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for (EngineInfo engine : engines) {
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TtsEnginePreference enginePref = new TtsEnginePreference(getActivity(), engine,
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this, activity);
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mEnginePreferenceCategory.addPreference(enginePref);
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}
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checkVoiceData(mCurrentEngine);
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}
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/**
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* Called when the TTS engine is initialized.
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*/
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public void onInitEngine(int status) {
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if (status == TextToSpeech.SUCCESS) {
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if (DBG) Log.d(TAG, "TTS engine for settings screen initialized.");
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checkDefaultLocale();
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} else {
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if (DBG) Log.d(TAG, "TTS engine for settings screen failed to initialize successfully.");
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updateWidgetState(false);
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}
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}
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private void checkDefaultLocale() {
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Locale defaultLocale = mTts.getDefaultLanguage();
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if (defaultLocale == null) {
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Log.e(TAG, "Failed to get default language from engine " + mCurrentEngine);
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updateWidgetState(false);
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updateEngineStatus(R.string.tts_status_not_supported);
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return;
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}
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// ISO-3166 alpha 3 country codes are out of spec. If we won't normalize,
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// we may end up with English (USA)and German (DEU).
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final Locale oldDefaultLocale = mCurrentDefaultLocale;
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mCurrentDefaultLocale = mEnginesHelper.parseLocaleString(defaultLocale.toString());
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if (!Objects.equals(oldDefaultLocale, mCurrentDefaultLocale)) {
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mSampleText = null;
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}
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int defaultAvailable = mTts.setLanguage(defaultLocale);
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if (evaluateDefaultLocale() && mSampleText == null) {
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getSampleText();
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}
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}
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private boolean evaluateDefaultLocale() {
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// Check if we are connected to the engine, and CHECK_VOICE_DATA returned list
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// of available languages.
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if (mCurrentDefaultLocale == null || mAvailableStrLocals == null) {
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return false;
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}
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boolean notInAvailableLangauges = true;
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try {
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// Check if language is listed in CheckVoices Action result as available voice.
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String defaultLocaleStr = mCurrentDefaultLocale.getISO3Language();
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if (!TextUtils.isEmpty(mCurrentDefaultLocale.getISO3Country())) {
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defaultLocaleStr += "-" + mCurrentDefaultLocale.getISO3Country();
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}
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if (!TextUtils.isEmpty(mCurrentDefaultLocale.getVariant())) {
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defaultLocaleStr += "-" + mCurrentDefaultLocale.getVariant();
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}
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for (String loc : mAvailableStrLocals) {
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if (loc.equalsIgnoreCase(defaultLocaleStr)) {
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notInAvailableLangauges = false;
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break;
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}
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}
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} catch (MissingResourceException e) {
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if (DBG) Log.wtf(TAG, "MissingResourceException", e);
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updateEngineStatus(R.string.tts_status_not_supported);
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updateWidgetState(false);
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return false;
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}
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int defaultAvailable = mTts.setLanguage(mCurrentDefaultLocale);
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if (defaultAvailable == TextToSpeech.LANG_NOT_SUPPORTED ||
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defaultAvailable == TextToSpeech.LANG_MISSING_DATA ||
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notInAvailableLangauges) {
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if (DBG) Log.d(TAG, "Default locale for this TTS engine is not supported.");
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updateEngineStatus(R.string.tts_status_not_supported);
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updateWidgetState(false);
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return false;
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} else {
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if (isNetworkRequiredForSynthesis()) {
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updateEngineStatus(R.string.tts_status_requires_network);
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} else {
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updateEngineStatus(R.string.tts_status_ok);
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}
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updateWidgetState(true);
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return true;
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}
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}
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/**
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* Ask the current default engine to return a string of sample text to be
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* spoken to the user.
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*/
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private void getSampleText() {
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String currentEngine = mTts.getCurrentEngine();
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if (TextUtils.isEmpty(currentEngine)) currentEngine = mTts.getDefaultEngine();
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// TODO: This is currently a hidden private API. The intent extras
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// and the intent action should be made public if we intend to make this
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// a public API. We fall back to using a canned set of strings if this
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// doesn't work.
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Intent intent = new Intent(TextToSpeech.Engine.ACTION_GET_SAMPLE_TEXT);
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intent.putExtra("language", mCurrentDefaultLocale.getLanguage());
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intent.putExtra("country", mCurrentDefaultLocale.getCountry());
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intent.putExtra("variant", mCurrentDefaultLocale.getVariant());
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intent.setPackage(currentEngine);
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try {
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if (DBG) Log.d(TAG, "Getting sample text: " + intent.toUri(0));
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startActivityForResult(intent, GET_SAMPLE_TEXT);
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} catch (ActivityNotFoundException ex) {
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Log.e(TAG, "Failed to get sample text, no activity found for " + intent + ")");
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}
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}
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/**
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* Called when voice data integrity check returns
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*/
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@Override
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public void onActivityResult(int requestCode, int resultCode, Intent data) {
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if (requestCode == GET_SAMPLE_TEXT) {
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onSampleTextReceived(resultCode, data);
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} else if (requestCode == VOICE_DATA_INTEGRITY_CHECK) {
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onVoiceDataIntegrityCheckDone(data);
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}
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}
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private String getDefaultSampleString() {
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if (mTts != null && mTts.getLanguage() != null) {
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try {
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final String currentLang = mTts.getLanguage().getISO3Language();
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String[] strings = getActivity().getResources().getStringArray(
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R.array.tts_demo_strings);
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String[] langs = getActivity().getResources().getStringArray(
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R.array.tts_demo_string_langs);
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for (int i = 0; i < strings.length; ++i) {
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if (langs[i].equals(currentLang)) {
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return strings[i];
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}
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}
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} catch (MissingResourceException e) {
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if (DBG) Log.wtf(TAG, "MissingResourceException", e);
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// Ignore and fall back to default sample string
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}
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}
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return getString(R.string.tts_default_sample_string);
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}
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private boolean isNetworkRequiredForSynthesis() {
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Set<String> features = mTts.getFeatures(mCurrentDefaultLocale);
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if (features == null) {
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return false;
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}
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return features.contains(TextToSpeech.Engine.KEY_FEATURE_NETWORK_SYNTHESIS) &&
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!features.contains(TextToSpeech.Engine.KEY_FEATURE_EMBEDDED_SYNTHESIS);
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}
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private void onSampleTextReceived(int resultCode, Intent data) {
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String sample = getDefaultSampleString();
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if (resultCode == TextToSpeech.LANG_AVAILABLE && data != null) {
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if (data != null && data.getStringExtra("sampleText") != null) {
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sample = data.getStringExtra("sampleText");
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}
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if (DBG) Log.d(TAG, "Got sample text: " + sample);
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} else {
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if (DBG) Log.d(TAG, "Using default sample text :" + sample);
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}
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mSampleText = sample;
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if (mSampleText != null) {
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updateWidgetState(true);
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} else {
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Log.e(TAG, "Did not have a sample string for the requested language. Using default");
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}
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}
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private void speakSampleText() {
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final boolean networkRequired = isNetworkRequiredForSynthesis();
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if (!networkRequired || networkRequired &&
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(mTts.isLanguageAvailable(mCurrentDefaultLocale) >= TextToSpeech.LANG_AVAILABLE)) {
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HashMap<String, String> params = new HashMap<String, String>();
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params.put(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID, "Sample");
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mTts.speak(mSampleText, TextToSpeech.QUEUE_FLUSH, params);
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} else {
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Log.w(TAG, "Network required for sample synthesis for requested language");
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displayNetworkAlert();
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}
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}
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@Override
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public boolean onPreferenceChange(Preference preference, Object objValue) {
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if (KEY_DEFAULT_RATE.equals(preference.getKey())) {
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// Default rate
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mDefaultRate = Integer.parseInt((String) objValue);
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try {
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android.provider.Settings.Secure.putInt(getContentResolver(),
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TTS_DEFAULT_RATE, mDefaultRate);
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if (mTts != null) {
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mTts.setSpeechRate(mDefaultRate / 100.0f);
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}
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if (DBG) Log.d(TAG, "TTS default rate changed, now " + mDefaultRate);
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} catch (NumberFormatException e) {
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Log.e(TAG, "could not persist default TTS rate setting", e);
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}
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}
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return true;
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}
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/**
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* Called when mPlayExample is clicked
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*/
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@Override
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public boolean onPreferenceClick(Preference preference) {
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if (preference == mPlayExample) {
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// Get the sample text from the TTS engine; onActivityResult will do
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// the actual speaking
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speakSampleText();
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return true;
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}
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return false;
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}
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private void updateWidgetState(boolean enable) {
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mPlayExample.setEnabled(enable);
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mDefaultRatePref.setEnabled(enable);
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mEngineStatus.setEnabled(enable);
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}
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private void updateEngineStatus(int resourceId) {
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Locale locale = mCurrentDefaultLocale;
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if (locale == null) {
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locale = Locale.getDefault();
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}
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mEngineStatus.setSummary(getString(resourceId, locale.getDisplayName()));
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}
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private void displayNetworkAlert() {
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AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
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builder.setTitle(android.R.string.dialog_alert_title)
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.setMessage(getActivity().getString(R.string.tts_engine_network_required))
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.setCancelable(false)
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.setPositiveButton(android.R.string.ok, null);
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AlertDialog dialog = builder.create();
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dialog.show();
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}
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private void updateDefaultEngine(String engine) {
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if (DBG) Log.d(TAG, "Updating default synth to : " + engine);
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// Disable the "play sample text" preference and the speech
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// rate preference while the engine is being swapped.
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updateWidgetState(false);
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updateEngineStatus(R.string.tts_status_checking);
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// Keep track of the previous engine that was being used. So that
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// we can reuse the previous engine.
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//
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// Note that if TextToSpeech#getCurrentEngine is not null, it means at
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// the very least that we successfully bound to the engine service.
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mPreviousEngine = mTts.getCurrentEngine();
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// Step 1: Shut down the existing TTS engine.
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if (mTts != null) {
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try {
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mTts.shutdown();
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mTts = null;
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} catch (Exception e) {
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Log.e(TAG, "Error shutting down TTS engine" + e);
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}
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}
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// Step 2: Connect to the new TTS engine.
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// Step 3 is continued on #onUpdateEngine (below) which is called when
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// the app binds successfully to the engine.
|
|
if (DBG) Log.d(TAG, "Updating engine : Attempting to connect to engine: " + engine);
|
|
mTts = new TextToSpeech(getActivity().getApplicationContext(), mUpdateListener, engine);
|
|
setTtsUtteranceProgressListener();
|
|
}
|
|
|
|
/*
|
|
* Step 3: We have now bound to the TTS engine the user requested. We will
|
|
* attempt to check voice data for the engine if we successfully bound to it,
|
|
* or revert to the previous engine if we didn't.
|
|
*/
|
|
public void onUpdateEngine(int status) {
|
|
if (status == TextToSpeech.SUCCESS) {
|
|
if (DBG) {
|
|
Log.d(TAG, "Updating engine: Successfully bound to the engine: " +
|
|
mTts.getCurrentEngine());
|
|
}
|
|
checkVoiceData(mTts.getCurrentEngine());
|
|
} else {
|
|
if (DBG) Log.d(TAG, "Updating engine: Failed to bind to engine, reverting.");
|
|
if (mPreviousEngine != null) {
|
|
// This is guaranteed to at least bind, since mPreviousEngine would be
|
|
// null if the previous bind to this engine failed.
|
|
mTts = new TextToSpeech(getActivity().getApplicationContext(), mInitListener,
|
|
mPreviousEngine);
|
|
setTtsUtteranceProgressListener();
|
|
}
|
|
mPreviousEngine = null;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Step 4: Check whether the voice data for the engine is ok.
|
|
*/
|
|
private void checkVoiceData(String engine) {
|
|
Intent intent = new Intent(TextToSpeech.Engine.ACTION_CHECK_TTS_DATA);
|
|
intent.setPackage(engine);
|
|
try {
|
|
if (DBG) Log.d(TAG, "Updating engine: Checking voice data: " + intent.toUri(0));
|
|
startActivityForResult(intent, VOICE_DATA_INTEGRITY_CHECK);
|
|
} catch (ActivityNotFoundException ex) {
|
|
Log.e(TAG, "Failed to check TTS data, no activity found for " + intent + ")");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Step 5: The voice data check is complete.
|
|
*/
|
|
private void onVoiceDataIntegrityCheckDone(Intent data) {
|
|
final String engine = mTts.getCurrentEngine();
|
|
|
|
if (engine == null) {
|
|
Log.e(TAG, "Voice data check complete, but no engine bound");
|
|
return;
|
|
}
|
|
|
|
if (data == null){
|
|
Log.e(TAG, "Engine failed voice data integrity check (null return)" +
|
|
mTts.getCurrentEngine());
|
|
return;
|
|
}
|
|
|
|
android.provider.Settings.Secure.putString(getContentResolver(), TTS_DEFAULT_SYNTH, engine);
|
|
|
|
mAvailableStrLocals = data.getStringArrayListExtra(
|
|
TextToSpeech.Engine.EXTRA_AVAILABLE_VOICES);
|
|
if (mAvailableStrLocals == null) {
|
|
Log.e(TAG, "Voice data check complete, but no available voices found");
|
|
// Set mAvailableStrLocals to empty list
|
|
mAvailableStrLocals = new ArrayList<String>();
|
|
}
|
|
if (evaluateDefaultLocale()) {
|
|
getSampleText();
|
|
}
|
|
|
|
final int engineCount = mEnginePreferenceCategory.getPreferenceCount();
|
|
for (int i = 0; i < engineCount; ++i) {
|
|
final Preference p = mEnginePreferenceCategory.getPreference(i);
|
|
if (p instanceof TtsEnginePreference) {
|
|
TtsEnginePreference enginePref = (TtsEnginePreference) p;
|
|
if (enginePref.getKey().equals(engine)) {
|
|
enginePref.setVoiceDataDetails(data);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public Checkable getCurrentChecked() {
|
|
return mCurrentChecked;
|
|
}
|
|
|
|
@Override
|
|
public String getCurrentKey() {
|
|
return mCurrentEngine;
|
|
}
|
|
|
|
@Override
|
|
public void setCurrentChecked(Checkable current) {
|
|
mCurrentChecked = current;
|
|
}
|
|
|
|
@Override
|
|
public void setCurrentKey(String key) {
|
|
mCurrentEngine = key;
|
|
updateDefaultEngine(mCurrentEngine);
|
|
}
|
|
|
|
}
|