/*
* 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 android.speech.tts;
import android.annotation.SdkConstant;
import android.annotation.SdkConstant.SdkConstantType;
import android.content.ComponentName;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.media.AudioAttributes;
import android.media.AudioManager;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.IBinder;
import android.os.ParcelFileDescriptor;
import android.os.RemoteException;
import android.provider.Settings;
import android.text.TextUtils;
import android.util.Log;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.MissingResourceException;
import java.util.Set;
/**
*
* Synthesizes speech from text for immediate playback or to create a sound file.
* A TextToSpeech instance can only be used to synthesize text once it has completed its
* initialization. Implement the {@link TextToSpeech.OnInitListener} to be
* notified of the completion of the initialization.
* When you are done using the TextToSpeech instance, call the {@link #shutdown()} method
* to release the native resources used by the TextToSpeech engine.
*/
public class TextToSpeech {
private static final String TAG = "TextToSpeech";
/**
* Denotes a successful operation.
*/
public static final int SUCCESS = 0;
/**
* Denotes a generic operation failure.
*/
public static final int ERROR = -1;
/**
* Denotes a stop requested by a client. It's used only on the service side of the API,
* client should never expect to see this result code.
*/
public static final int STOPPED = -2;
/**
* Denotes a failure of a TTS engine to synthesize the given input.
*/
public static final int ERROR_SYNTHESIS = -3;
/**
* Denotes a failure of a TTS service.
*/
public static final int ERROR_SERVICE = -4;
/**
* Denotes a failure related to the output (audio device or a file).
*/
public static final int ERROR_OUTPUT = -5;
/**
* Denotes a failure caused by a network connectivity problems.
*/
public static final int ERROR_NETWORK = -6;
/**
* Denotes a failure caused by network timeout.
*/
public static final int ERROR_NETWORK_TIMEOUT = -7;
/**
* Denotes a failure caused by an invalid request.
*/
public static final int ERROR_INVALID_REQUEST = -8;
/**
* Denotes a failure caused by an unfinished download of the voice data.
* @see Engine#KEY_FEATURE_NOT_INSTALLED
*/
public static final int ERROR_NOT_INSTALLED_YET = -9;
/**
* Queue mode where all entries in the playback queue (media to be played
* and text to be synthesized) are dropped and replaced by the new entry.
* Queues are flushed with respect to a given calling app. Entries in the queue
* from other callees are not discarded.
*/
public static final int QUEUE_FLUSH = 0;
/**
* Queue mode where the new entry is added at the end of the playback queue.
*/
public static final int QUEUE_ADD = 1;
/**
* Queue mode where the entire playback queue is purged. This is different
* from {@link #QUEUE_FLUSH} in that all entries are purged, not just entries
* from a given caller.
*
* @hide
*/
static final int QUEUE_DESTROY = 2;
/**
* Denotes the language is available exactly as specified by the locale.
*/
public static final int LANG_COUNTRY_VAR_AVAILABLE = 2;
/**
* Denotes the language is available for the language and country specified
* by the locale, but not the variant.
*/
public static final int LANG_COUNTRY_AVAILABLE = 1;
/**
* Denotes the language is available for the language by the locale,
* but not the country and variant.
*/
public static final int LANG_AVAILABLE = 0;
/**
* Denotes the language data is missing.
*/
public static final int LANG_MISSING_DATA = -1;
/**
* Denotes the language is not supported.
*/
public static final int LANG_NOT_SUPPORTED = -2;
/**
* Broadcast Action: The TextToSpeech synthesizer has completed processing
* of all the text in the speech queue.
*
* Note that this notifies callers when the engine has finished has
* processing text data. Audio playback might not have completed (or even started)
* at this point. If you wish to be notified when this happens, see
* {@link OnUtteranceCompletedListener}.
*/
@SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
public static final String ACTION_TTS_QUEUE_PROCESSING_COMPLETED =
"android.speech.tts.TTS_QUEUE_PROCESSING_COMPLETED";
/**
* Interface definition of a callback to be invoked indicating the completion of the
* TextToSpeech engine initialization.
*/
public interface OnInitListener {
/**
* Called to signal the completion of the TextToSpeech engine initialization.
*
* @param status {@link TextToSpeech#SUCCESS} or {@link TextToSpeech#ERROR}.
*/
public void onInit(int status);
}
/**
* Listener that will be called when the TTS service has
* completed synthesizing an utterance. This is only called if the utterance
* has an utterance ID (see {@link TextToSpeech.Engine#KEY_PARAM_UTTERANCE_ID}).
*
* @deprecated Use {@link UtteranceProgressListener} instead.
*/
@Deprecated
public interface OnUtteranceCompletedListener {
/**
* Called when an utterance has been synthesized.
*
* @param utteranceId the identifier of the utterance.
*/
public void onUtteranceCompleted(String utteranceId);
}
/**
* Constants and parameter names for controlling text-to-speech. These include:
*
*
* -
* Intents to ask engine to install data or check its data and
* extras for a TTS engine's check data activity.
*
* -
* Keys for the parameters passed with speak commands, e.g.
* {@link Engine#KEY_PARAM_UTTERANCE_ID}, {@link Engine#KEY_PARAM_STREAM}.
*
* -
* A list of feature strings that engines might support, e.g
* {@link Engine#KEY_FEATURE_NETWORK_SYNTHESIS}). These values may be passed in to
* {@link TextToSpeech#speak} and {@link TextToSpeech#synthesizeToFile} to modify
* engine behaviour. The engine can be queried for the set of features it supports
* through {@link TextToSpeech#getFeatures(java.util.Locale)}.
*
*
*/
public class Engine {
/**
* Default speech rate.
* @hide
*/
public static final int DEFAULT_RATE = 100;
/**
* Default pitch.
* @hide
*/
public static final int DEFAULT_PITCH = 100;
/**
* Default volume.
* @hide
*/
public static final float DEFAULT_VOLUME = 1.0f;
/**
* Default pan (centered).
* @hide
*/
public static final float DEFAULT_PAN = 0.0f;
/**
* Default value for {@link Settings.Secure#TTS_USE_DEFAULTS}.
* @hide
*/
public static final int USE_DEFAULTS = 0; // false
/**
* Package name of the default TTS engine.
*
* @hide
* @deprecated No longer in use, the default engine is determined by
* the sort order defined in {@link TtsEngines}. Note that
* this doesn't "break" anything because there is no guarantee that
* the engine specified below is installed on a given build, let
* alone be the default.
*/
@Deprecated
public static final String DEFAULT_ENGINE = "com.svox.pico";
/**
* Default audio stream used when playing synthesized speech.
*/
public static final int DEFAULT_STREAM = AudioManager.STREAM_MUSIC;
/**
* Indicates success when checking the installation status of the resources used by the
* TextToSpeech engine with the {@link #ACTION_CHECK_TTS_DATA} intent.
*/
public static final int CHECK_VOICE_DATA_PASS = 1;
/**
* Indicates failure when checking the installation status of the resources used by the
* TextToSpeech engine with the {@link #ACTION_CHECK_TTS_DATA} intent.
*/
public static final int CHECK_VOICE_DATA_FAIL = 0;
/**
* Indicates erroneous data when checking the installation status of the resources used by
* the TextToSpeech engine with the {@link #ACTION_CHECK_TTS_DATA} intent.
*
* @deprecated Use CHECK_VOICE_DATA_FAIL instead.
*/
@Deprecated
public static final int CHECK_VOICE_DATA_BAD_DATA = -1;
/**
* Indicates missing resources when checking the installation status of the resources used
* by the TextToSpeech engine with the {@link #ACTION_CHECK_TTS_DATA} intent.
*
* @deprecated Use CHECK_VOICE_DATA_FAIL instead.
*/
@Deprecated
public static final int CHECK_VOICE_DATA_MISSING_DATA = -2;
/**
* Indicates missing storage volume when checking the installation status of the resources
* used by the TextToSpeech engine with the {@link #ACTION_CHECK_TTS_DATA} intent.
*
* @deprecated Use CHECK_VOICE_DATA_FAIL instead.
*/
@Deprecated
public static final int CHECK_VOICE_DATA_MISSING_VOLUME = -3;
/**
* Intent for starting a TTS service. Services that handle this intent must
* extend {@link TextToSpeechService}. Normal applications should not use this intent
* directly, instead they should talk to the TTS service using the the methods in this
* class.
*/
@SdkConstant(SdkConstantType.SERVICE_ACTION)
public static final String INTENT_ACTION_TTS_SERVICE =
"android.intent.action.TTS_SERVICE";
/**
* Name under which a text to speech engine publishes information about itself.
* This meta-data should reference an XML resource containing a
* <{@link android.R.styleable#TextToSpeechEngine tts-engine}>
* tag.
*/
public static final String SERVICE_META_DATA = "android.speech.tts";
// intents to ask engine to install data or check its data
/**
* Activity Action: Triggers the platform TextToSpeech engine to
* start the activity that installs the resource files on the device
* that are required for TTS to be operational. Since the installation
* of the data can be interrupted or declined by the user, the application
* shouldn't expect successful installation upon return from that intent,
* and if need be, should check installation status with
* {@link #ACTION_CHECK_TTS_DATA}.
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_INSTALL_TTS_DATA =
"android.speech.tts.engine.INSTALL_TTS_DATA";
/**
* Broadcast Action: broadcast to signal the change in the list of available
* languages or/and their features.
*/
@SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
public static final String ACTION_TTS_DATA_INSTALLED =
"android.speech.tts.engine.TTS_DATA_INSTALLED";
/**
* Activity Action: Starts the activity from the platform TextToSpeech
* engine to verify the proper installation and availability of the
* resource files on the system. Upon completion, the activity will
* return one of the following codes:
* {@link #CHECK_VOICE_DATA_PASS},
* {@link #CHECK_VOICE_DATA_FAIL},
* Moreover, the data received in the activity result will contain the following
* fields:
*
* - {@link #EXTRA_AVAILABLE_VOICES} which contains an ArrayList of all the
* available voices. The format of each voice is: lang-COUNTRY-variant where COUNTRY and
* variant are optional (ie, "eng" or "eng-USA" or "eng-USA-FEMALE").
* - {@link #EXTRA_UNAVAILABLE_VOICES} which contains an ArrayList of all the
* unavailable voices (ones that user can install). The format of each voice is:
* lang-COUNTRY-variant where COUNTRY and variant are optional (ie, "eng" or
* "eng-USA" or "eng-USA-FEMALE").
*
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_CHECK_TTS_DATA =
"android.speech.tts.engine.CHECK_TTS_DATA";
/**
* Activity intent for getting some sample text to use for demonstrating TTS. Specific
* locale have to be requested by passing following extra parameters:
*
* - language
* - country
* - variant
*
*
* Upon completion, the activity result may contain the following fields:
*
* - {@link #EXTRA_SAMPLE_TEXT} which contains an String with sample text.
*
*/
@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
public static final String ACTION_GET_SAMPLE_TEXT =
"android.speech.tts.engine.GET_SAMPLE_TEXT";
/**
* Extra information received with the {@link #ACTION_GET_SAMPLE_TEXT} intent result where
* the TextToSpeech engine returns an String with sample text for requested voice
*/
public static final String EXTRA_SAMPLE_TEXT = "sampleText";
// extras for a TTS engine's check data activity
/**
* Extra information received with the {@link #ACTION_CHECK_TTS_DATA} intent result where
* the TextToSpeech engine returns an ArrayList of all the available voices.
* The format of each voice is: lang-COUNTRY-variant where COUNTRY and variant are
* optional (ie, "eng" or "eng-USA" or "eng-USA-FEMALE").
*/
public static final String EXTRA_AVAILABLE_VOICES = "availableVoices";
/**
* Extra information received with the {@link #ACTION_CHECK_TTS_DATA} intent result where
* the TextToSpeech engine returns an ArrayList of all the unavailable voices.
* The format of each voice is: lang-COUNTRY-variant where COUNTRY and variant are
* optional (ie, "eng" or "eng-USA" or "eng-USA-FEMALE").
*/
public static final String EXTRA_UNAVAILABLE_VOICES = "unavailableVoices";
/**
* Extra information received with the {@link #ACTION_CHECK_TTS_DATA} intent result where
* the TextToSpeech engine specifies the path to its resources.
*
* It may be used by language packages to find out where to put their data.
*
* @deprecated TTS engine implementation detail, this information has no use for
* text-to-speech API client.
*/
@Deprecated
public static final String EXTRA_VOICE_DATA_ROOT_DIRECTORY = "dataRoot";
/**
* Extra information received with the {@link #ACTION_CHECK_TTS_DATA} intent result where
* the TextToSpeech engine specifies the file names of its resources under the
* resource path.
*
* @deprecated TTS engine implementation detail, this information has no use for
* text-to-speech API client.
*/
@Deprecated
public static final String EXTRA_VOICE_DATA_FILES = "dataFiles";
/**
* Extra information received with the {@link #ACTION_CHECK_TTS_DATA} intent result where
* the TextToSpeech engine specifies the locale associated with each resource file.
*
* @deprecated TTS engine implementation detail, this information has no use for
* text-to-speech API client.
*/
@Deprecated
public static final String EXTRA_VOICE_DATA_FILES_INFO = "dataFilesInfo";
/**
* Extra information sent with the {@link #ACTION_CHECK_TTS_DATA} intent where the
* caller indicates to the TextToSpeech engine which specific sets of voice data to
* check for by sending an ArrayList of the voices that are of interest.
* The format of each voice is: lang-COUNTRY-variant where COUNTRY and variant are
* optional (ie, "eng" or "eng-USA" or "eng-USA-FEMALE").
*
* @deprecated Redundant functionality, checking for existence of specific sets of voice
* data can be done on client side.
*/
@Deprecated
public static final String EXTRA_CHECK_VOICE_DATA_FOR = "checkVoiceDataFor";
// extras for a TTS engine's data installation
/**
* Extra information received with the {@link #ACTION_TTS_DATA_INSTALLED} intent result.
* It indicates whether the data files for the synthesis engine were successfully
* installed. The installation was initiated with the {@link #ACTION_INSTALL_TTS_DATA}
* intent. The possible values for this extra are
* {@link TextToSpeech#SUCCESS} and {@link TextToSpeech#ERROR}.
*
* @deprecated No longer in use. If client ise interested in information about what
* changed, is should send ACTION_CHECK_TTS_DATA intent to discover available voices.
*/
@Deprecated
public static final String EXTRA_TTS_DATA_INSTALLED = "dataInstalled";
// keys for the parameters passed with speak commands. Hidden keys are used internally
// to maintain engine state for each TextToSpeech instance.
/**
* @hide
*/
public static final String KEY_PARAM_RATE = "rate";
/**
* @hide
*/
public static final String KEY_PARAM_VOICE_NAME = "voiceName";
/**
* @hide
*/
public static final String KEY_PARAM_LANGUAGE = "language";
/**
* @hide
*/
public static final String KEY_PARAM_COUNTRY = "country";
/**
* @hide
*/
public static final String KEY_PARAM_VARIANT = "variant";
/**
* @hide
*/
public static final String KEY_PARAM_ENGINE = "engine";
/**
* @hide
*/
public static final String KEY_PARAM_PITCH = "pitch";
/**
* Parameter key to specify the audio stream type to be used when speaking text
* or playing back a file. The value should be one of the STREAM_ constants
* defined in {@link AudioManager}.
*
* @see TextToSpeech#speak(String, int, HashMap)
* @see TextToSpeech#playEarcon(String, int, HashMap)
*/
public static final String KEY_PARAM_STREAM = "streamType";
/**
* Parameter key to specify the audio attributes to be used when
* speaking text or playing back a file. The value should be set
* using {@link TextToSpeech#setAudioAttributes(AudioAttributes)}.
*
* @see TextToSpeech#speak(String, int, HashMap)
* @see TextToSpeech#playEarcon(String, int, HashMap)
* @hide
*/
public static final String KEY_PARAM_AUDIO_ATTRIBUTES = "audioAttributes";
/**
* Parameter key to identify an utterance in the
* {@link TextToSpeech.OnUtteranceCompletedListener} after text has been
* spoken, a file has been played back or a silence duration has elapsed.
*
* @see TextToSpeech#speak(String, int, HashMap)
* @see TextToSpeech#playEarcon(String, int, HashMap)
* @see TextToSpeech#synthesizeToFile(String, HashMap, String)
*/
public static final String KEY_PARAM_UTTERANCE_ID = "utteranceId";
/**
* Parameter key to specify the speech volume relative to the current stream type
* volume used when speaking text. Volume is specified as a float ranging from 0 to 1
* where 0 is silence, and 1 is the maximum volume (the default behavior).
*
* @see TextToSpeech#speak(String, int, HashMap)
* @see TextToSpeech#playEarcon(String, int, HashMap)
*/
public static final String KEY_PARAM_VOLUME = "volume";
/**
* Parameter key to specify how the speech is panned from left to right when speaking text.
* Pan is specified as a float ranging from -1 to +1 where -1 maps to a hard-left pan,
* 0 to center (the default behavior), and +1 to hard-right.
*
* @see TextToSpeech#speak(String, int, HashMap)
* @see TextToSpeech#playEarcon(String, int, HashMap)
*/
public static final String KEY_PARAM_PAN = "pan";
/**
* Feature key for network synthesis. See {@link TextToSpeech#getFeatures(Locale)}
* for a description of how feature keys work. If set (and supported by the engine
* as per {@link TextToSpeech#getFeatures(Locale)}, the engine must
* use network based synthesis.
*
* @see TextToSpeech#speak(String, int, java.util.HashMap)
* @see TextToSpeech#synthesizeToFile(String, java.util.HashMap, String)
* @see TextToSpeech#getFeatures(java.util.Locale)
*
* @deprecated Starting from API level 21, to select network synthesis, call
* ({@link TextToSpeech#getVoices()}, find a suitable network voice
* ({@link Voice#isNetworkConnectionRequired()}) and pass it
* to {@link TextToSpeech#setVoice(Voice)}).
*/
@Deprecated
public static final String KEY_FEATURE_NETWORK_SYNTHESIS = "networkTts";
/**
* Feature key for embedded synthesis. See {@link TextToSpeech#getFeatures(Locale)}
* for a description of how feature keys work. If set and supported by the engine
* as per {@link TextToSpeech#getFeatures(Locale)}, the engine must synthesize
* text on-device (without making network requests).
*
* @see TextToSpeech#speak(String, int, java.util.HashMap)
* @see TextToSpeech#synthesizeToFile(String, java.util.HashMap, String)
* @see TextToSpeech#getFeatures(java.util.Locale)
* @deprecated Starting from API level 21, to select embedded synthesis, call
* ({@link TextToSpeech#getVoices()}, find a suitable embedded voice
* ({@link Voice#isNetworkConnectionRequired()}) and pass it
* to {@link TextToSpeech#setVoice(Voice)}).
*/
@Deprecated
public static final String KEY_FEATURE_EMBEDDED_SYNTHESIS = "embeddedTts";
/**
* Parameter key to specify an audio session identifier (obtained from
* {@link AudioManager#generateAudioSessionId()}) that will be used by the request audio
* output. It can be used to associate one of the {@link android.media.audiofx.AudioEffect}
* objects with the synthesis (or earcon) output.
*
* @see TextToSpeech#speak(String, int, HashMap)
* @see TextToSpeech#playEarcon(String, int, HashMap)
*/
public static final String KEY_PARAM_SESSION_ID = "sessionId";
/**
* Feature key that indicates that the voice may need to download additional data to be fully
* functional. The download will be triggered by calling
* {@link TextToSpeech#setVoice(Voice)} or {@link TextToSpeech#setLanguage(Locale)}.
* Until download is complete, each synthesis request will either report
* {@link TextToSpeech#ERROR_NOT_INSTALLED_YET} error, or use a different voice to synthesize
* the request. This feature should NOT be used as a key of a request parameter.
*
* @see TextToSpeech#getFeatures(java.util.Locale)
* @see Voice#getFeatures()
*/
public static final String KEY_FEATURE_NOT_INSTALLED = "notInstalled";
/**
* Feature key that indicate that a network timeout can be set for the request. If set and
* supported as per {@link TextToSpeech#getFeatures(Locale)} or {@link Voice#getFeatures()},
* it can be used as request parameter to set the maximum allowed time for a single
* request attempt, in milliseconds, before synthesis fails. When used as a key of
* a request parameter, its value should be a string with an integer value.
*
* @see TextToSpeech#getFeatures(java.util.Locale)
* @see Voice#getFeatures()
*/
public static final String KEY_FEATURE_NETWORK_TIMEOUT_MS = "networkTimeoutMs";
/**
* Feature key that indicates that network request retries count can be set for the request.
* If set and supported as per {@link TextToSpeech#getFeatures(Locale)} or
* {@link Voice#getFeatures()}, it can be used as a request parameter to set the
* number of network request retries that are attempted in case of failure. When used as
* a key of a request parameter, its value should be a string with an integer value.
*
* @see TextToSpeech#getFeatures(java.util.Locale)
* @see Voice#getFeatures()
*/
public static final String KEY_FEATURE_NETWORK_RETRIES_COUNT = "networkRetriesCount";
}
private final Context mContext;
private Connection mConnectingServiceConnection;
private Connection mServiceConnection;
private OnInitListener mInitListener;
// Written from an unspecified application thread, read from
// a binder thread.
private volatile UtteranceProgressListener mUtteranceProgressListener;
private final Object mStartLock = new Object();
private String mRequestedEngine;
// Whether to initialize this TTS object with the default engine,
// if the requested engine is not available. Valid only if mRequestedEngine
// is not null. Used only for testing, though potentially useful API wise
// too.
private final boolean mUseFallback;
private final Map mEarcons;
private final Map mUtterances;
private final Bundle mParams = new Bundle();
private final TtsEngines mEnginesHelper;
private volatile String mCurrentEngine = null;
/**
* The constructor for the TextToSpeech class, using the default TTS engine.
* This will also initialize the associated TextToSpeech engine if it isn't already running.
*
* @param context
* The context this instance is running in.
* @param listener
* The {@link TextToSpeech.OnInitListener} that will be called when the
* TextToSpeech engine has initialized. In a case of a failure the listener
* may be called immediately, before TextToSpeech instance is fully constructed.
*/
public TextToSpeech(Context context, OnInitListener listener) {
this(context, listener, null);
}
/**
* The constructor for the TextToSpeech class, using the given TTS engine.
* This will also initialize the associated TextToSpeech engine if it isn't already running.
*
* @param context
* The context this instance is running in.
* @param listener
* The {@link TextToSpeech.OnInitListener} that will be called when the
* TextToSpeech engine has initialized. In a case of a failure the listener
* may be called immediately, before TextToSpeech instance is fully constructed.
* @param engine Package name of the TTS engine to use.
*/
public TextToSpeech(Context context, OnInitListener listener, String engine) {
this(context, listener, engine, null, true);
}
/**
* Used by the framework to instantiate TextToSpeech objects with a supplied
* package name, instead of using {@link android.content.Context#getPackageName()}
*
* @hide
*/
public TextToSpeech(Context context, OnInitListener listener, String engine,
String packageName, boolean useFallback) {
mContext = context;
mInitListener = listener;
mRequestedEngine = engine;
mUseFallback = useFallback;
mEarcons = new HashMap();
mUtterances = new HashMap();
mUtteranceProgressListener = null;
mEnginesHelper = new TtsEngines(mContext);
initTts();
}
private R runActionNoReconnect(Action action, R errorResult, String method,
boolean onlyEstablishedConnection) {
return runAction(action, errorResult, method, false, onlyEstablishedConnection);
}
private R runAction(Action action, R errorResult, String method) {
return runAction(action, errorResult, method, true, true);
}
private R runAction(Action action, R errorResult, String method,
boolean reconnect, boolean onlyEstablishedConnection) {
synchronized (mStartLock) {
if (mServiceConnection == null) {
Log.w(TAG, method + " failed: not bound to TTS engine");
return errorResult;
}
return mServiceConnection.runAction(action, errorResult, method, reconnect,
onlyEstablishedConnection);
}
}
private int initTts() {
// Step 1: Try connecting to the engine that was requested.
if (mRequestedEngine != null) {
if (mEnginesHelper.isEngineInstalled(mRequestedEngine)) {
if (connectToEngine(mRequestedEngine)) {
mCurrentEngine = mRequestedEngine;
return SUCCESS;
} else if (!mUseFallback) {
mCurrentEngine = null;
dispatchOnInit(ERROR);
return ERROR;
}
} else if (!mUseFallback) {
Log.i(TAG, "Requested engine not installed: " + mRequestedEngine);
mCurrentEngine = null;
dispatchOnInit(ERROR);
return ERROR;
}
}
// Step 2: Try connecting to the user's default engine.
final String defaultEngine = getDefaultEngine();
if (defaultEngine != null && !defaultEngine.equals(mRequestedEngine)) {
if (connectToEngine(defaultEngine)) {
mCurrentEngine = defaultEngine;
return SUCCESS;
}
}
// Step 3: Try connecting to the highest ranked engine in the
// system.
final String highestRanked = mEnginesHelper.getHighestRankedEngineName();
if (highestRanked != null && !highestRanked.equals(mRequestedEngine) &&
!highestRanked.equals(defaultEngine)) {
if (connectToEngine(highestRanked)) {
mCurrentEngine = highestRanked;
return SUCCESS;
}
}
// NOTE: The API currently does not allow the caller to query whether
// they are actually connected to any engine. This might fail for various
// reasons like if the user disables all her TTS engines.
mCurrentEngine = null;
dispatchOnInit(ERROR);
return ERROR;
}
private boolean connectToEngine(String engine) {
Connection connection = new Connection();
Intent intent = new Intent(Engine.INTENT_ACTION_TTS_SERVICE);
intent.setPackage(engine);
boolean bound = mContext.bindService(intent, connection, Context.BIND_AUTO_CREATE);
if (!bound) {
Log.e(TAG, "Failed to bind to " + engine);
return false;
} else {
Log.i(TAG, "Sucessfully bound to " + engine);
mConnectingServiceConnection = connection;
return true;
}
}
private void dispatchOnInit(int result) {
synchronized (mStartLock) {
if (mInitListener != null) {
mInitListener.onInit(result);
mInitListener = null;
}
}
}
private IBinder getCallerIdentity() {
return mServiceConnection.getCallerIdentity();
}
/**
* Releases the resources used by the TextToSpeech engine.
* It is good practice for instance to call this method in the onDestroy() method of an Activity
* so the TextToSpeech engine can be cleanly stopped.
*/
public void shutdown() {
// Special case, we are asked to shutdown connection that did finalize its connection.
synchronized (mStartLock) {
if (mConnectingServiceConnection != null) {
mContext.unbindService(mConnectingServiceConnection);
mConnectingServiceConnection = null;
return;
}
}
// Post connection case
runActionNoReconnect(new Action() {
@Override
public Void run(ITextToSpeechService service) throws RemoteException {
service.setCallback(getCallerIdentity(), null);
service.stop(getCallerIdentity());
mServiceConnection.disconnect();
// Context#unbindService does not result in a call to
// ServiceConnection#onServiceDisconnected. As a result, the
// service ends up being destroyed (if there are no other open
// connections to it) but the process lives on and the
// ServiceConnection continues to refer to the destroyed service.
//
// This leads to tons of log spam about SynthThread being dead.
mServiceConnection = null;
mCurrentEngine = null;
return null;
}
}, null, "shutdown", false);
}
/**
* Adds a mapping between a string of text and a sound resource in a
* package. After a call to this method, subsequent calls to
* {@link #speak(String, int, HashMap)} will play the specified sound resource
* if it is available, or synthesize the text it is missing.
*
* @param text
* The string of text. Example: "south_south_east"
*
* @param packagename
* Pass the packagename of the application that contains the
* resource. If the resource is in your own application (this is
* the most common case), then put the packagename of your
* application here.
* Example: "com.google.marvin.compass"
* The packagename can be found in the AndroidManifest.xml of
* your application.
*
* <manifest xmlns:android="..."
* package="com.google.marvin.compass">
*
*
* @param resourceId
* Example: R.raw.south_south_east
*
* @return Code indicating success or failure. See {@link #ERROR} and {@link #SUCCESS}.
*/
public int addSpeech(String text, String packagename, int resourceId) {
synchronized (mStartLock) {
mUtterances.put(text, makeResourceUri(packagename, resourceId));
return SUCCESS;
}
}
/**
* Adds a mapping between a CharSequence (may be spanned with TtsSpans) of text
* and a sound resource in a package. After a call to this method, subsequent calls to
* {@link #speak(String, int, HashMap)} will play the specified sound resource
* if it is available, or synthesize the text it is missing.
*
* @param text
* The string of text. Example: "south_south_east"
*
* @param packagename
* Pass the packagename of the application that contains the
* resource. If the resource is in your own application (this is
* the most common case), then put the packagename of your
* application here.
* Example: "com.google.marvin.compass"
* The packagename can be found in the AndroidManifest.xml of
* your application.
*
* <manifest xmlns:android="..."
* package="com.google.marvin.compass">
*
*
* @param resourceId
* Example: R.raw.south_south_east
*
* @return Code indicating success or failure. See {@link #ERROR} and {@link #SUCCESS}.
*/
public int addSpeech(CharSequence text, String packagename, int resourceId) {
synchronized (mStartLock) {
mUtterances.put(text, makeResourceUri(packagename, resourceId));
return SUCCESS;
}
}
/**
* Adds a mapping between a string of text and a sound file. Using this, it
* is possible to add custom pronounciations for a string of text.
* After a call to this method, subsequent calls to {@link #speak(String, int, HashMap)}
* will play the specified sound resource if it is available, or synthesize the text it is
* missing.
*
* @param text
* The string of text. Example: "south_south_east"
* @param filename
* The full path to the sound file (for example:
* "/sdcard/mysounds/hello.wav")
*
* @return Code indicating success or failure. See {@link #ERROR} and {@link #SUCCESS}.
*/
public int addSpeech(String text, String filename) {
synchronized (mStartLock) {
mUtterances.put(text, Uri.parse(filename));
return SUCCESS;
}
}
/**
* Adds a mapping between a CharSequence (may be spanned with TtsSpans and a sound file.
* Using this, it is possible to add custom pronounciations for a string of text.
* After a call to this method, subsequent calls to {@link #speak(String, int, HashMap)}
* will play the specified sound resource if it is available, or synthesize the text it is
* missing.
*
* @param text
* The string of text. Example: "south_south_east"
* @param file
* File object pointing to the sound file.
*
* @return Code indicating success or failure. See {@link #ERROR} and {@link #SUCCESS}.
*/
public int addSpeech(CharSequence text, File file) {
synchronized (mStartLock) {
mUtterances.put(text, Uri.fromFile(file));
return SUCCESS;
}
}
/**
* Adds a mapping between a string of text and a sound resource in a
* package. Use this to add custom earcons.
*
* @see #playEarcon(String, int, HashMap)
*
* @param earcon The name of the earcon.
* Example: "[tick]"
*
* @param packagename
* the package name of the application that contains the
* resource. This can for instance be the package name of your own application.
* Example: "com.google.marvin.compass"
* The package name can be found in the AndroidManifest.xml of
* the application containing the resource.
*
* <manifest xmlns:android="..."
* package="com.google.marvin.compass">
*
*
* @param resourceId
* Example: R.raw.tick_snd
*
* @return Code indicating success or failure. See {@link #ERROR} and {@link #SUCCESS}.
*/
public int addEarcon(String earcon, String packagename, int resourceId) {
synchronized(mStartLock) {
mEarcons.put(earcon, makeResourceUri(packagename, resourceId));
return SUCCESS;
}
}
/**
* Adds a mapping between a string of text and a sound file.
* Use this to add custom earcons.
*
* @see #playEarcon(String, int, HashMap)
*
* @param earcon
* The name of the earcon.
* Example: "[tick]"
* @param filename
* The full path to the sound file (for example:
* "/sdcard/mysounds/tick.wav")
*
* @return Code indicating success or failure. See {@link #ERROR} and {@link #SUCCESS}.
*
* @deprecated As of API level 21, replaced by
* {@link #addEarcon(String, File)}.
*/
@Deprecated
public int addEarcon(String earcon, String filename) {
synchronized(mStartLock) {
mEarcons.put(earcon, Uri.parse(filename));
return SUCCESS;
}
}
/**
* Adds a mapping between a string of text and a sound file.
* Use this to add custom earcons.
*
* @see #playEarcon(String, int, HashMap)
*
* @param earcon
* The name of the earcon.
* Example: "[tick]"
* @param file
* File object pointing to the sound file.
*
* @return Code indicating success or failure. See {@link #ERROR} and {@link #SUCCESS}.
*/
public int addEarcon(String earcon, File file) {
synchronized(mStartLock) {
mEarcons.put(earcon, Uri.fromFile(file));
return SUCCESS;
}
}
private Uri makeResourceUri(String packageName, int resourceId) {
return new Uri.Builder()
.scheme(ContentResolver.SCHEME_ANDROID_RESOURCE)
.encodedAuthority(packageName)
.appendEncodedPath(String.valueOf(resourceId))
.build();
}
/**
* Speaks the text using the specified queuing strategy and speech parameters, the text may
* be spanned with TtsSpans.
* This method is asynchronous, i.e. the method just adds the request to the queue of TTS
* requests and then returns. The synthesis might not have finished (or even started!) at the
* time when this method returns. In order to reliably detect errors during synthesis,
* we recommend setting an utterance progress listener (see
* {@link #setOnUtteranceProgressListener}) and using the
* {@link Engine#KEY_PARAM_UTTERANCE_ID} parameter.
*
* @param text The string of text to be spoken. No longer than
* {@link #getMaxSpeechInputLength()} characters.
* @param queueMode The queuing strategy to use, {@link #QUEUE_ADD} or {@link #QUEUE_FLUSH}.
* @param params Parameters for the request. Can be null.
* Supported parameter names:
* {@link Engine#KEY_PARAM_STREAM},
* {@link Engine#KEY_PARAM_VOLUME},
* {@link Engine#KEY_PARAM_PAN}.
* Engine specific parameters may be passed in but the parameter keys
* must be prefixed by the name of the engine they are intended for. For example
* the keys "com.svox.pico_foo" and "com.svox.pico:bar" will be passed to the
* engine named "com.svox.pico" if it is being used.
* @param utteranceId An unique identifier for this request.
*
* @return {@link #ERROR} or {@link #SUCCESS} of queuing the speak operation.
*/
public int speak(final CharSequence text,
final int queueMode,
final Bundle params,
final String utteranceId) {
return runAction(new Action() {
@Override
public Integer run(ITextToSpeechService service) throws RemoteException {
Uri utteranceUri = mUtterances.get(text);
if (utteranceUri != null) {
return service.playAudio(getCallerIdentity(), utteranceUri, queueMode,
getParams(params), utteranceId);
} else {
return service.speak(getCallerIdentity(), text, queueMode, getParams(params),
utteranceId);
}
}
}, ERROR, "speak");
}
/**
* Speaks the string using the specified queuing strategy and speech parameters.
* This method is asynchronous, i.e. the method just adds the request to the queue of TTS
* requests and then returns. The synthesis might not have finished (or even started!) at the
* time when this method returns. In order to reliably detect errors during synthesis,
* we recommend setting an utterance progress listener (see
* {@link #setOnUtteranceProgressListener}) and using the
* {@link Engine#KEY_PARAM_UTTERANCE_ID} parameter.
*
* @param text The string of text to be spoken. No longer than
* {@link #getMaxSpeechInputLength()} characters.
* @param queueMode The queuing strategy to use, {@link #QUEUE_ADD} or {@link #QUEUE_FLUSH}.
* @param params Parameters for the request. Can be null.
* Supported parameter names:
* {@link Engine#KEY_PARAM_STREAM},
* {@link Engine#KEY_PARAM_UTTERANCE_ID},
* {@link Engine#KEY_PARAM_VOLUME},
* {@link Engine#KEY_PARAM_PAN}.
* Engine specific parameters may be passed in but the parameter keys
* must be prefixed by the name of the engine they are intended for. For example
* the keys "com.svox.pico_foo" and "com.svox.pico:bar" will be passed to the
* engine named "com.svox.pico" if it is being used.
*
* @return {@link #ERROR} or {@link #SUCCESS} of queuing the speak operation.
* @deprecated As of API level 21, replaced by
* {@link #speak(CharSequence, int, Bundle, String)}.
*/
@Deprecated
public int speak(final String text, final int queueMode, final HashMap params) {
return speak(text, queueMode, convertParamsHashMaptoBundle(params),
params == null ? null : params.get(Engine.KEY_PARAM_UTTERANCE_ID));
}
/**
* Plays the earcon using the specified queueing mode and parameters.
* The earcon must already have been added with {@link #addEarcon(String, String)} or
* {@link #addEarcon(String, String, int)}.
* This method is asynchronous, i.e. the method just adds the request to the queue of TTS
* requests and then returns. The synthesis might not have finished (or even started!) at the
* time when this method returns. In order to reliably detect errors during synthesis,
* we recommend setting an utterance progress listener (see
* {@link #setOnUtteranceProgressListener}) and using the
* {@link Engine#KEY_PARAM_UTTERANCE_ID} parameter.
*
* @param earcon The earcon that should be played
* @param queueMode {@link #QUEUE_ADD} or {@link #QUEUE_FLUSH}.
* @param params Parameters for the request. Can be null.
* Supported parameter names:
* {@link Engine#KEY_PARAM_STREAM},
* Engine specific parameters may be passed in but the parameter keys
* must be prefixed by the name of the engine they are intended for. For example
* the keys "com.svox.pico_foo" and "com.svox.pico:bar" will be passed to the
* engine named "com.svox.pico" if it is being used.
*
* @return {@link #ERROR} or {@link #SUCCESS} of queuing the playEarcon operation.
*/
public int playEarcon(final String earcon, final int queueMode,
final Bundle params, final String utteranceId) {
return runAction(new Action() {
@Override
public Integer run(ITextToSpeechService service) throws RemoteException {
Uri earconUri = mEarcons.get(earcon);
if (earconUri == null) {
return ERROR;
}
return service.playAudio(getCallerIdentity(), earconUri, queueMode,
getParams(params), utteranceId);
}
}, ERROR, "playEarcon");
}
/**
* Plays the earcon using the specified queueing mode and parameters.
* The earcon must already have been added with {@link #addEarcon(String, String)} or
* {@link #addEarcon(String, String, int)}.
* This method is asynchronous, i.e. the method just adds the request to the queue of TTS
* requests and then returns. The synthesis might not have finished (or even started!) at the
* time when this method returns. In order to reliably detect errors during synthesis,
* we recommend setting an utterance progress listener (see
* {@link #setOnUtteranceProgressListener}) and using the
* {@link Engine#KEY_PARAM_UTTERANCE_ID} parameter.
*
* @param earcon The earcon that should be played
* @param queueMode {@link #QUEUE_ADD} or {@link #QUEUE_FLUSH}.
* @param params Parameters for the request. Can be null.
* Supported parameter names:
* {@link Engine#KEY_PARAM_STREAM},
* {@link Engine#KEY_PARAM_UTTERANCE_ID}.
* Engine specific parameters may be passed in but the parameter keys
* must be prefixed by the name of the engine they are intended for. For example
* the keys "com.svox.pico_foo" and "com.svox.pico:bar" will be passed to the
* engine named "com.svox.pico" if it is being used.
*
* @return {@link #ERROR} or {@link #SUCCESS} of queuing the playEarcon operation.
* @deprecated As of API level 21, replaced by
* {@link #playEarcon(String, int, Bundle, String)}.
*/
@Deprecated
public int playEarcon(final String earcon, final int queueMode,
final HashMap params) {
return playEarcon(earcon, queueMode, convertParamsHashMaptoBundle(params),
params == null ? null : params.get(Engine.KEY_PARAM_UTTERANCE_ID));
}
/**
* Plays silence for the specified amount of time using the specified
* queue mode.
* This method is asynchronous, i.e. the method just adds the request to the queue of TTS
* requests and then returns. The synthesis might not have finished (or even started!) at the
* time when this method returns. In order to reliably detect errors during synthesis,
* we recommend setting an utterance progress listener (see
* {@link #setOnUtteranceProgressListener}) and using the
* {@link Engine#KEY_PARAM_UTTERANCE_ID} parameter.
*
* @param durationInMs The duration of the silence.
* @param queueMode {@link #QUEUE_ADD} or {@link #QUEUE_FLUSH}.
* @param utteranceId An unique identifier for this request.
*
* @return {@link #ERROR} or {@link #SUCCESS} of queuing the playSilentUtterance operation.
*/
public int playSilentUtterance(final long durationInMs, final int queueMode,
final String utteranceId) {
return runAction(new Action() {
@Override
public Integer run(ITextToSpeechService service) throws RemoteException {
return service.playSilence(getCallerIdentity(), durationInMs,
queueMode, utteranceId);
}
}, ERROR, "playSilentUtterance");
}
/**
* Plays silence for the specified amount of time using the specified
* queue mode.
* This method is asynchronous, i.e. the method just adds the request to the queue of TTS
* requests and then returns. The synthesis might not have finished (or even started!) at the
* time when this method returns. In order to reliably detect errors during synthesis,
* we recommend setting an utterance progress listener (see
* {@link #setOnUtteranceProgressListener}) and using the
* {@link Engine#KEY_PARAM_UTTERANCE_ID} parameter.
*
* @param durationInMs The duration of the silence.
* @param queueMode {@link #QUEUE_ADD} or {@link #QUEUE_FLUSH}.
* @param params Parameters for the request. Can be null.
* Supported parameter names:
* {@link Engine#KEY_PARAM_UTTERANCE_ID}.
* Engine specific parameters may be passed in but the parameter keys
* must be prefixed by the name of the engine they are intended for. For example
* the keys "com.svox.pico_foo" and "com.svox.pico:bar" will be passed to the
* engine named "com.svox.pico" if it is being used.
*
* @return {@link #ERROR} or {@link #SUCCESS} of queuing the playSilence operation.
* @deprecated As of API level 21, replaced by
* {@link #playSilentUtterance(long, int, String)}.
*/
@Deprecated
public int playSilence(final long durationInMs, final int queueMode,
final HashMap params) {
return playSilentUtterance(durationInMs, queueMode,
params == null ? null : params.get(Engine.KEY_PARAM_UTTERANCE_ID));
}
/**
* Queries the engine for the set of features it supports for a given locale.
* Features can either be framework defined, e.g.
* {@link TextToSpeech.Engine#KEY_FEATURE_NETWORK_SYNTHESIS} or engine specific.
* Engine specific keys must be prefixed by the name of the engine they
* are intended for. These keys can be used as parameters to
* {@link TextToSpeech#speak(String, int, java.util.HashMap)} and
* {@link TextToSpeech#synthesizeToFile(String, java.util.HashMap, String)}.
*
* Features values are strings and their values must meet restrictions described in their
* documentation.
*
* @param locale The locale to query features for.
* @return Set instance. May return {@code null} on error.
* @deprecated As of API level 21, please use voices. In order to query features of the voice,
* call {@link #getVoices()} to retrieve the list of available voices and
* {@link Voice#getFeatures()} to retrieve the set of features.
*/
@Deprecated
public Set getFeatures(final Locale locale) {
return runAction(new Action>() {
@Override
public Set run(ITextToSpeechService service) throws RemoteException {
String[] features = null;
try {
features = service.getFeaturesForLanguage(
locale.getISO3Language(), locale.getISO3Country(), locale.getVariant());
} catch(MissingResourceException e) {
Log.w(TAG, "Couldn't retrieve 3 letter ISO 639-2/T language and/or ISO 3166 " +
"country code for locale: " + locale, e);
return null;
}
if (features != null) {
final Set featureSet = new HashSet();
Collections.addAll(featureSet, features);
return featureSet;
}
return null;
}
}, null, "getFeatures");
}
/**
* Checks whether the TTS engine is busy speaking. Note that a speech item is
* considered complete once it's audio data has been sent to the audio mixer, or
* written to a file. There might be a finite lag between this point, and when
* the audio hardware completes playback.
*
* @return {@code true} if the TTS engine is speaking.
*/
public boolean isSpeaking() {
return runAction(new Action() {
@Override
public Boolean run(ITextToSpeechService service) throws RemoteException {
return service.isSpeaking();
}
}, false, "isSpeaking");
}
/**
* Interrupts the current utterance (whether played or rendered to file) and discards other
* utterances in the queue.
*
* @return {@link #ERROR} or {@link #SUCCESS}.
*/
public int stop() {
return runAction(new Action() {
@Override
public Integer run(ITextToSpeechService service) throws RemoteException {
return service.stop(getCallerIdentity());
}
}, ERROR, "stop");
}
/**
* Sets the speech rate.
*
* This has no effect on any pre-recorded speech.
*
* @param speechRate Speech rate. {@code 1.0} is the normal speech rate,
* lower values slow down the speech ({@code 0.5} is half the normal speech rate),
* greater values accelerate it ({@code 2.0} is twice the normal speech rate).
*
* @return {@link #ERROR} or {@link #SUCCESS}.
*/
public int setSpeechRate(float speechRate) {
if (speechRate > 0.0f) {
int intRate = (int)(speechRate * 100);
if (intRate > 0) {
synchronized (mStartLock) {
mParams.putInt(Engine.KEY_PARAM_RATE, intRate);
}
return SUCCESS;
}
}
return ERROR;
}
/**
* Sets the speech pitch for the TextToSpeech engine.
*
* This has no effect on any pre-recorded speech.
*
* @param pitch Speech pitch. {@code 1.0} is the normal pitch,
* lower values lower the tone of the synthesized voice,
* greater values increase it.
*
* @return {@link #ERROR} or {@link #SUCCESS}.
*/
public int setPitch(float pitch) {
if (pitch > 0.0f) {
int intPitch = (int)(pitch * 100);
if (intPitch > 0) {
synchronized (mStartLock) {
mParams.putInt(Engine.KEY_PARAM_PITCH, intPitch);
}
return SUCCESS;
}
}
return ERROR;
}
/**
* Sets the audio attributes to be used when speaking text or playing
* back a file.
*
* @param audioAttributes Valid AudioAttributes instance.
*
* @return {@link #ERROR} or {@link #SUCCESS}.
*/
public int setAudioAttributes(AudioAttributes audioAttributes) {
if (audioAttributes != null) {
synchronized (mStartLock) {
mParams.putParcelable(Engine.KEY_PARAM_AUDIO_ATTRIBUTES,
audioAttributes);
}
return SUCCESS;
}
return ERROR;
}
/**
* @return the engine currently in use by this TextToSpeech instance.
* @hide
*/
public String getCurrentEngine() {
return mCurrentEngine;
}
/**
* Returns a Locale instance describing the language currently being used as the default
* Text-to-speech language.
*
* The locale object returned by this method is NOT a valid one. It has identical form to the
* one in {@link #getLanguage()}. Please refer to {@link #getLanguage()} for more information.
*
* @return language, country (if any) and variant (if any) used by the client stored in a
* Locale instance, or {@code null} on error.
* @deprecated As of API level 21, use getDefaultVoice().getLocale() ({@link
* #getDefaultVoice()})
*/
@Deprecated
public Locale getDefaultLanguage() {
return runAction(new Action() {
@Override
public Locale run(ITextToSpeechService service) throws RemoteException {
String[] defaultLanguage = service.getClientDefaultLanguage();
return new Locale(defaultLanguage[0], defaultLanguage[1], defaultLanguage[2]);
}
}, null, "getDefaultLanguage");
}
/**
* Sets the text-to-speech language.
* The TTS engine will try to use the closest match to the specified
* language as represented by the Locale, but there is no guarantee that the exact same Locale
* will be used. Use {@link #isLanguageAvailable(Locale)} to check the level of support
* before choosing the language to use for the next utterances.
*
* This method sets the current voice to the default one for the given Locale;
* {@link #getVoice()} can be used to retrieve it.
*
* @param loc The locale describing the language to be used.
*
* @return Code indicating the support status for the locale. See {@link #LANG_AVAILABLE},
* {@link #LANG_COUNTRY_AVAILABLE}, {@link #LANG_COUNTRY_VAR_AVAILABLE},
* {@link #LANG_MISSING_DATA} and {@link #LANG_NOT_SUPPORTED}.
*/
public int setLanguage(final Locale loc) {
return runAction(new Action() {
@Override
public Integer run(ITextToSpeechService service) throws RemoteException {
if (loc == null) {
return LANG_NOT_SUPPORTED;
}
String language = null, country = null;
try {
language = loc.getISO3Language();
} catch (MissingResourceException e) {
Log.w(TAG, "Couldn't retrieve ISO 639-2/T language code for locale: " + loc, e);
return LANG_NOT_SUPPORTED;
}
try {
country = loc.getISO3Country();
} catch (MissingResourceException e) {
Log.w(TAG, "Couldn't retrieve ISO 3166 country code for locale: " + loc, e);
return LANG_NOT_SUPPORTED;
}
String variant = loc.getVariant();
// As of API level 21, setLanguage is implemented using setVoice.
// (which, in the default implementation, will call loadLanguage on the service
// interface).
// Sanitize locale using isLanguageAvailable.
int result = service.isLanguageAvailable( language, country, variant);
if (result >= LANG_AVAILABLE){
if (result < LANG_COUNTRY_VAR_AVAILABLE) {
variant = "";
if (result < LANG_COUNTRY_AVAILABLE) {
country = "";
}
}
// Get the default voice for the locale.
String voiceName = service.getDefaultVoiceNameFor(language, country, variant);
if (TextUtils.isEmpty(voiceName)) {
Log.w(TAG, "Couldn't find the default voice for " + language + "/" +
country + "/" + variant);
return LANG_NOT_SUPPORTED;
}
// Load it.
if (service.loadVoice(getCallerIdentity(), voiceName) == TextToSpeech.ERROR) {
return LANG_NOT_SUPPORTED;
}
mParams.putString(Engine.KEY_PARAM_VOICE_NAME, voiceName);
mParams.putString(Engine.KEY_PARAM_LANGUAGE, language);
mParams.putString(Engine.KEY_PARAM_COUNTRY, country);
mParams.putString(Engine.KEY_PARAM_VARIANT, variant);
}
return result;
}
}, LANG_NOT_SUPPORTED, "setLanguage");
}
/**
* Returns a Locale instance describing the language currently being used for synthesis
* requests sent to the TextToSpeech engine.
*
* In Android 4.2 and before (API <= 17) this function returns the language that is currently
* being used by the TTS engine. That is the last language set by this or any other
* client by a {@link TextToSpeech#setLanguage} call to the same engine.
*
* In Android versions after 4.2 this function returns the language that is currently being
* used for the synthesis requests sent from this client. That is the last language set
* by a {@link TextToSpeech#setLanguage} call on this instance.
*
* If a voice is set (by {@link #setVoice(Voice)}), getLanguage will return the language of
* the currently set voice.
*
* Please note that the Locale object returned by this method is NOT a valid Locale object. Its
* language field contains a three-letter ISO 639-2/T code (where a proper Locale would use
* a two-letter ISO 639-1 code), and the country field contains a three-letter ISO 3166 country
* code (where a proper Locale would use a two-letter ISO 3166-1 code).
*
* @return language, country (if any) and variant (if any) used by the client stored in a
* Locale instance, or {@code null} on error.
*
* @deprecated As of API level 21, please use getVoice().getLocale()
* ({@link #getVoice()}).
*/
@Deprecated
public Locale getLanguage() {
return runAction(new Action() {
@Override
public Locale run(ITextToSpeechService service) {
/* No service call, but we're accessing mParams, hence need for
wrapping it as an Action instance */
String lang = mParams.getString(Engine.KEY_PARAM_LANGUAGE, "");
String country = mParams.getString(Engine.KEY_PARAM_COUNTRY, "");
String variant = mParams.getString(Engine.KEY_PARAM_VARIANT, "");
return new Locale(lang, country, variant);
}
}, null, "getLanguage");
}
/**
* Query the engine about the set of available languages.
*/
public Set getAvailableLanguages() {
return runAction(new Action>() {
@Override
public Set run(ITextToSpeechService service) throws RemoteException {
List voices = service.getVoices();
if (voices == null) {
return new HashSet();
}
HashSet locales = new HashSet();
for (Voice voice : voices) {
locales.add(voice.getLocale());
}
return locales;
}
}, null, "getAvailableLanguages");
}
/**
* Query the engine about the set of available voices.
*
* Each TTS Engine can expose multiple voices for each locale, each with a different set of
* features.
*
* @see #setVoice(Voice)
* @see Voice
*/
public Set getVoices() {
return runAction(new Action>() {
@Override
public Set run(ITextToSpeechService service) throws RemoteException {
List voices = service.getVoices();
return (voices != null) ? new HashSet(voices) : new HashSet();
}
}, null, "getVoices");
}
/**
* Sets the text-to-speech voice.
*
* @param voice One of objects returned by {@link #getVoices()}.
*
* @return {@link #ERROR} or {@link #SUCCESS}.
*
* @see #getVoices
* @see Voice
*/
public int setVoice(final Voice voice) {
return runAction(new Action() {
@Override
public Integer run(ITextToSpeechService service) throws RemoteException {
int result = service.loadVoice(getCallerIdentity(), voice.getName());
if (result == SUCCESS) {
mParams.putString(Engine.KEY_PARAM_VOICE_NAME, voice.getName());
// Set the language/country/variant, so #getLanguage will return the voice
// locale when called.
String language = "";
try {
language = voice.getLocale().getISO3Language();
} catch (MissingResourceException e) {
Log.w(TAG, "Couldn't retrieve ISO 639-2/T language code for locale: " +
voice.getLocale(), e);
}
String country = "";
try {
country = voice.getLocale().getISO3Country();
} catch (MissingResourceException e) {
Log.w(TAG, "Couldn't retrieve ISO 3166 country code for locale: " +
voice.getLocale(), e);
}
mParams.putString(Engine.KEY_PARAM_LANGUAGE, language);
mParams.putString(Engine.KEY_PARAM_COUNTRY, country);
mParams.putString(Engine.KEY_PARAM_VARIANT, voice.getLocale().getVariant());
}
return result;
}
}, LANG_NOT_SUPPORTED, "setVoice");
}
/**
* Returns a Voice instance describing the voice currently being used for synthesis
* requests sent to the TextToSpeech engine.
*
* @return Voice instance used by the client, or {@code null} if not set or on error.
*
* @see #getVoices
* @see #setVoice
* @see Voice
*/
public Voice getVoice() {
return runAction(new Action() {
@Override
public Voice run(ITextToSpeechService service) throws RemoteException {
String voiceName = mParams.getString(Engine.KEY_PARAM_VOICE_NAME, "");
if (TextUtils.isEmpty(voiceName)) {
return null;
}
List voices = service.getVoices();
if (voices == null) {
return null;
}
for (Voice voice : voices) {
if (voice.getName().equals(voiceName)) {
return voice;
}
}
return null;
}
}, null, "getVoice");
}
/**
* Returns a Voice instance that's the default voice for the default Text-to-speech language.
* @return The default voice instance for the default language, or {@code null} if not set or
* on error.
*/
public Voice getDefaultVoice() {
return runAction(new Action() {
@Override
public Voice run(ITextToSpeechService service) throws RemoteException {
String[] defaultLanguage = service.getClientDefaultLanguage();
if (defaultLanguage == null || defaultLanguage.length == 0) {
Log.e(TAG, "service.getClientDefaultLanguage() returned empty array");
return null;
}
String language = defaultLanguage[0];
String country = (defaultLanguage.length > 1) ? defaultLanguage[1] : "";
String variant = (defaultLanguage.length > 2) ? defaultLanguage[2] : "";
// Sanitize the locale using isLanguageAvailable.
int result = service.isLanguageAvailable(language, country, variant);
if (result >= LANG_AVAILABLE){
if (result < LANG_COUNTRY_VAR_AVAILABLE) {
variant = "";
if (result < LANG_COUNTRY_AVAILABLE) {
country = "";
}
}
} else {
// The default language is not supported.
return null;
}
// Get the default voice name
String voiceName = service.getDefaultVoiceNameFor(language, country, variant);
if (TextUtils.isEmpty(voiceName)) {
return null;
}
// Find it
List voices = service.getVoices();
if (voices == null) {
return null;
}
for (Voice voice : voices) {
if (voice.getName().equals(voiceName)) {
return voice;
}
}
return null;
}
}, null, "getDefaultVoice");
}
/**
* Checks if the specified language as represented by the Locale is available and supported.
*
* @param loc The Locale describing the language to be used.
*
* @return Code indicating the support status for the locale. See {@link #LANG_AVAILABLE},
* {@link #LANG_COUNTRY_AVAILABLE}, {@link #LANG_COUNTRY_VAR_AVAILABLE},
* {@link #LANG_MISSING_DATA} and {@link #LANG_NOT_SUPPORTED}.
*/
public int isLanguageAvailable(final Locale loc) {
return runAction(new Action() {
@Override
public Integer run(ITextToSpeechService service) throws RemoteException {
String language = null, country = null;
try {
language = loc.getISO3Language();
} catch (MissingResourceException e) {
Log.w(TAG, "Couldn't retrieve ISO 639-2/T language code for locale: " + loc, e);
return LANG_NOT_SUPPORTED;
}
try {
country = loc.getISO3Country();
} catch (MissingResourceException e) {
Log.w(TAG, "Couldn't retrieve ISO 3166 country code for locale: " + loc, e);
return LANG_NOT_SUPPORTED;
}
return service.isLanguageAvailable(language, country, loc.getVariant());
}
}, LANG_NOT_SUPPORTED, "isLanguageAvailable");
}
/**
* Synthesizes the given text to a file using the specified parameters.
* This method is asynchronous, i.e. the method just adds the request to the queue of TTS
* requests and then returns. The synthesis might not have finished (or even started!) at the
* time when this method returns. In order to reliably detect errors during synthesis,
* we recommend setting an utterance progress listener (see
* {@link #setOnUtteranceProgressListener}).
*
* @param text The text that should be synthesized. No longer than
* {@link #getMaxSpeechInputLength()} characters.
* @param params Parameters for the request. Can be null.
* Engine specific parameters may be passed in but the parameter keys
* must be prefixed by the name of the engine they are intended for. For example
* the keys "com.svox.pico_foo" and "com.svox.pico:bar" will be passed to the
* engine named "com.svox.pico" if it is being used.
* @param file File to write the generated audio data to.
* @param utteranceId An unique identifier for this request.
* @return {@link #ERROR} or {@link #SUCCESS} of queuing the synthesizeToFile operation.
*/
public int synthesizeToFile(final CharSequence text, final Bundle params,
final File file, final String utteranceId) {
return runAction(new Action() {
@Override
public Integer run(ITextToSpeechService service) throws RemoteException {
ParcelFileDescriptor fileDescriptor;
int returnValue;
try {
if(file.exists() && !file.canWrite()) {
Log.e(TAG, "Can't write to " + file);
return ERROR;
}
fileDescriptor = ParcelFileDescriptor.open(file,
ParcelFileDescriptor.MODE_WRITE_ONLY |
ParcelFileDescriptor.MODE_CREATE |
ParcelFileDescriptor.MODE_TRUNCATE);
returnValue = service.synthesizeToFileDescriptor(getCallerIdentity(), text,
fileDescriptor, getParams(params), utteranceId);
fileDescriptor.close();
return returnValue;
} catch (FileNotFoundException e) {
Log.e(TAG, "Opening file " + file + " failed", e);
return ERROR;
} catch (IOException e) {
Log.e(TAG, "Closing file " + file + " failed", e);
return ERROR;
}
}
}, ERROR, "synthesizeToFile");
}
/**
* Synthesizes the given text to a file using the specified parameters.
* This method is asynchronous, i.e. the method just adds the request to the queue of TTS
* requests and then returns. The synthesis might not have finished (or even started!) at the
* time when this method returns. In order to reliably detect errors during synthesis,
* we recommend setting an utterance progress listener (see
* {@link #setOnUtteranceProgressListener}) and using the
* {@link Engine#KEY_PARAM_UTTERANCE_ID} parameter.
*
* @param text The text that should be synthesized. No longer than
* {@link #getMaxSpeechInputLength()} characters.
* @param params Parameters for the request. Can be null.
* Supported parameter names:
* {@link Engine#KEY_PARAM_UTTERANCE_ID}.
* Engine specific parameters may be passed in but the parameter keys
* must be prefixed by the name of the engine they are intended for. For example
* the keys "com.svox.pico_foo" and "com.svox.pico:bar" will be passed to the
* engine named "com.svox.pico" if it is being used.
* @param filename Absolute file filename to write the generated audio data to.It should be
* something like "/sdcard/myappsounds/mysound.wav".
*
* @return {@link #ERROR} or {@link #SUCCESS} of queuing the synthesizeToFile operation.
* @deprecated As of API level 21, replaced by
* {@link #synthesizeToFile(CharSequence, Bundle, File, String)}.
*/
@Deprecated
public int synthesizeToFile(final String text, final HashMap params,
final String filename) {
return synthesizeToFile(text, convertParamsHashMaptoBundle(params),
new File(filename), params.get(Engine.KEY_PARAM_UTTERANCE_ID));
}
private Bundle convertParamsHashMaptoBundle(HashMap params) {
if (params != null && !params.isEmpty()) {
Bundle bundle = new Bundle();
copyIntParam(bundle, params, Engine.KEY_PARAM_STREAM);
copyIntParam(bundle, params, Engine.KEY_PARAM_SESSION_ID);
copyStringParam(bundle, params, Engine.KEY_PARAM_UTTERANCE_ID);
copyFloatParam(bundle, params, Engine.KEY_PARAM_VOLUME);
copyFloatParam(bundle, params, Engine.KEY_PARAM_PAN);
// Copy feature strings defined by the framework.
copyStringParam(bundle, params, Engine.KEY_FEATURE_NETWORK_SYNTHESIS);
copyStringParam(bundle, params, Engine.KEY_FEATURE_EMBEDDED_SYNTHESIS);
copyIntParam(bundle, params, Engine.KEY_FEATURE_NETWORK_TIMEOUT_MS);
copyIntParam(bundle, params, Engine.KEY_FEATURE_NETWORK_RETRIES_COUNT);
// Copy over all parameters that start with the name of the
// engine that we are currently connected to. The engine is
// free to interpret them as it chooses.
if (!TextUtils.isEmpty(mCurrentEngine)) {
for (Map.Entry entry : params.entrySet()) {
final String key = entry.getKey();
if (key != null && key.startsWith(mCurrentEngine)) {
bundle.putString(key, entry.getValue());
}
}
}
return bundle;
}
return null;
}
private Bundle getParams(Bundle params) {
if (params != null && !params.isEmpty()) {
Bundle bundle = new Bundle(mParams);
bundle.putAll(params);
verifyIntegerBundleParam(bundle, Engine.KEY_PARAM_STREAM);
verifyIntegerBundleParam(bundle, Engine.KEY_PARAM_SESSION_ID);
verifyStringBundleParam(bundle, Engine.KEY_PARAM_UTTERANCE_ID);
verifyFloatBundleParam(bundle, Engine.KEY_PARAM_VOLUME);
verifyFloatBundleParam(bundle, Engine.KEY_PARAM_PAN);
// Copy feature strings defined by the framework.
verifyBooleanBundleParam(bundle, Engine.KEY_FEATURE_NETWORK_SYNTHESIS);
verifyBooleanBundleParam(bundle, Engine.KEY_FEATURE_EMBEDDED_SYNTHESIS);
verifyIntegerBundleParam(bundle, Engine.KEY_FEATURE_NETWORK_TIMEOUT_MS);
verifyIntegerBundleParam(bundle, Engine.KEY_FEATURE_NETWORK_RETRIES_COUNT);
return bundle;
} else {
return mParams;
}
}
private static boolean verifyIntegerBundleParam(Bundle bundle, String key) {
if (bundle.containsKey(key)) {
if (!(bundle.get(key) instanceof Integer ||
bundle.get(key) instanceof Long)) {
bundle.remove(key);
Log.w(TAG, "Synthesis request paramter " + key + " containst value "
+ " with invalid type. Should be an Integer or a Long");
return false;
}
}
return true;
}
private static boolean verifyStringBundleParam(Bundle bundle, String key) {
if (bundle.containsKey(key)) {
if (!(bundle.get(key) instanceof String)) {
bundle.remove(key);
Log.w(TAG, "Synthesis request paramter " + key + " containst value "
+ " with invalid type. Should be a String");
return false;
}
}
return true;
}
private static boolean verifyBooleanBundleParam(Bundle bundle, String key) {
if (bundle.containsKey(key)) {
if (!(bundle.get(key) instanceof Boolean ||
bundle.get(key) instanceof String)) {
bundle.remove(key);
Log.w(TAG, "Synthesis request paramter " + key + " containst value "
+ " with invalid type. Should be a Boolean or String");
return false;
}
}
return true;
}
private static boolean verifyFloatBundleParam(Bundle bundle, String key) {
if (bundle.containsKey(key)) {
if (!(bundle.get(key) instanceof Float ||
bundle.get(key) instanceof Double)) {
bundle.remove(key);
Log.w(TAG, "Synthesis request paramter " + key + " containst value "
+ " with invalid type. Should be a Float or a Double");
return false;
}
}
return true;
}
private void copyStringParam(Bundle bundle, HashMap params, String key) {
String value = params.get(key);
if (value != null) {
bundle.putString(key, value);
}
}
private void copyIntParam(Bundle bundle, HashMap params, String key) {
String valueString = params.get(key);
if (!TextUtils.isEmpty(valueString)) {
try {
int value = Integer.parseInt(valueString);
bundle.putInt(key, value);
} catch (NumberFormatException ex) {
// don't set the value in the bundle
}
}
}
private void copyFloatParam(Bundle bundle, HashMap params, String key) {
String valueString = params.get(key);
if (!TextUtils.isEmpty(valueString)) {
try {
float value = Float.parseFloat(valueString);
bundle.putFloat(key, value);
} catch (NumberFormatException ex) {
// don't set the value in the bundle
}
}
}
/**
* Sets the listener that will be notified when synthesis of an utterance completes.
*
* @param listener The listener to use.
*
* @return {@link #ERROR} or {@link #SUCCESS}.
*
* @deprecated Use {@link #setOnUtteranceProgressListener(UtteranceProgressListener)}
* instead.
*/
@Deprecated
public int setOnUtteranceCompletedListener(final OnUtteranceCompletedListener listener) {
mUtteranceProgressListener = UtteranceProgressListener.from(listener);
return TextToSpeech.SUCCESS;
}
/**
* Sets the listener that will be notified of various events related to the
* synthesis of a given utterance.
*
* See {@link UtteranceProgressListener} and
* {@link TextToSpeech.Engine#KEY_PARAM_UTTERANCE_ID}.
*
* @param listener the listener to use.
* @return {@link #ERROR} or {@link #SUCCESS}
*/
public int setOnUtteranceProgressListener(UtteranceProgressListener listener) {
mUtteranceProgressListener = listener;
return TextToSpeech.SUCCESS;
}
/**
* Sets the TTS engine to use.
*
* @deprecated This doesn't inform callers when the TTS engine has been
* initialized. {@link #TextToSpeech(Context, OnInitListener, String)}
* can be used with the appropriate engine name. Also, there is no
* guarantee that the engine specified will be loaded. If it isn't
* installed or disabled, the user / system wide defaults will apply.
*
* @param enginePackageName The package name for the synthesis engine (e.g. "com.svox.pico")
*
* @return {@link #ERROR} or {@link #SUCCESS}.
*/
@Deprecated
public int setEngineByPackageName(String enginePackageName) {
mRequestedEngine = enginePackageName;
return initTts();
}
/**
* Gets the package name of the default speech synthesis engine.
*
* @return Package name of the TTS engine that the user has chosen
* as their default.
*/
public String getDefaultEngine() {
return mEnginesHelper.getDefaultEngine();
}
/**
* Checks whether the user's settings should override settings requested
* by the calling application. As of the Ice cream sandwich release,
* user settings never forcibly override the app's settings.
*/
@Deprecated
public boolean areDefaultsEnforced() {
return false;
}
/**
* Gets a list of all installed TTS engines.
*
* @return A list of engine info objects. The list can be empty, but never {@code null}.
*/
public List getEngines() {
return mEnginesHelper.getEngines();
}
private class Connection implements ServiceConnection {
private ITextToSpeechService mService;
private SetupConnectionAsyncTask mOnSetupConnectionAsyncTask;
private boolean mEstablished;
private final ITextToSpeechCallback.Stub mCallback = new ITextToSpeechCallback.Stub() {
public void onStop(String utteranceId) throws RemoteException {
UtteranceProgressListener listener = mUtteranceProgressListener;
if (listener != null) {
listener.onDone(utteranceId);
}
};
@Override
public void onSuccess(String utteranceId) {
UtteranceProgressListener listener = mUtteranceProgressListener;
if (listener != null) {
listener.onDone(utteranceId);
}
}
@Override
public void onError(String utteranceId, int errorCode) {
UtteranceProgressListener listener = mUtteranceProgressListener;
if (listener != null) {
listener.onError(utteranceId);
}
}
@Override
public void onStart(String utteranceId) {
UtteranceProgressListener listener = mUtteranceProgressListener;
if (listener != null) {
listener.onStart(utteranceId);
}
}
};
private class SetupConnectionAsyncTask extends AsyncTask {
private final ComponentName mName;
public SetupConnectionAsyncTask(ComponentName name) {
mName = name;
}
@Override
protected Integer doInBackground(Void... params) {
synchronized(mStartLock) {
if (isCancelled()) {
return null;
}
try {
mService.setCallback(getCallerIdentity(), mCallback);
if (mParams.getString(Engine.KEY_PARAM_LANGUAGE) == null) {
String[] defaultLanguage = mService.getClientDefaultLanguage();
mParams.putString(Engine.KEY_PARAM_LANGUAGE, defaultLanguage[0]);
mParams.putString(Engine.KEY_PARAM_COUNTRY, defaultLanguage[1]);
mParams.putString(Engine.KEY_PARAM_VARIANT, defaultLanguage[2]);
// Get the default voice for the locale.
String defaultVoiceName = mService.getDefaultVoiceNameFor(
defaultLanguage[0], defaultLanguage[1], defaultLanguage[2]);
mParams.putString(Engine.KEY_PARAM_VOICE_NAME, defaultVoiceName);
}
Log.i(TAG, "Set up connection to " + mName);
return SUCCESS;
} catch (RemoteException re) {
Log.e(TAG, "Error connecting to service, setCallback() failed");
return ERROR;
}
}
}
@Override
protected void onPostExecute(Integer result) {
synchronized(mStartLock) {
if (mOnSetupConnectionAsyncTask == this) {
mOnSetupConnectionAsyncTask = null;
}
mEstablished = true;
dispatchOnInit(result);
}
}
}
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
synchronized(mStartLock) {
mConnectingServiceConnection = null;
Log.i(TAG, "Connected to " + name);
if (mOnSetupConnectionAsyncTask != null) {
mOnSetupConnectionAsyncTask.cancel(false);
}
mService = ITextToSpeechService.Stub.asInterface(service);
mServiceConnection = Connection.this;
mEstablished = false;
mOnSetupConnectionAsyncTask = new SetupConnectionAsyncTask(name);
mOnSetupConnectionAsyncTask.execute();
}
}
public IBinder getCallerIdentity() {
return mCallback;
}
/**
* Clear connection related fields and cancel mOnServiceConnectedAsyncTask if set.
*
* @return true if we cancel mOnSetupConnectionAsyncTask in progress.
*/
private boolean clearServiceConnection() {
synchronized(mStartLock) {
boolean result = false;
if (mOnSetupConnectionAsyncTask != null) {
result = mOnSetupConnectionAsyncTask.cancel(false);
mOnSetupConnectionAsyncTask = null;
}
mService = null;
// If this is the active connection, clear it
if (mServiceConnection == this) {
mServiceConnection = null;
}
return result;
}
}
@Override
public void onServiceDisconnected(ComponentName name) {
Log.i(TAG, "Asked to disconnect from " + name);
if (clearServiceConnection()) {
/* We need to protect against a rare case where engine
* dies just after successful connection - and we process onServiceDisconnected
* before OnServiceConnectedAsyncTask.onPostExecute. onServiceDisconnected cancels
* OnServiceConnectedAsyncTask.onPostExecute and we don't call dispatchOnInit
* with ERROR as argument.
*/
dispatchOnInit(ERROR);
}
}
public void disconnect() {
mContext.unbindService(this);
clearServiceConnection();
}
public boolean isEstablished() {
return mService != null && mEstablished;
}
public R runAction(Action action, R errorResult, String method,
boolean reconnect, boolean onlyEstablishedConnection) {
synchronized (mStartLock) {
try {
if (mService == null) {
Log.w(TAG, method + " failed: not connected to TTS engine");
return errorResult;
}
if (onlyEstablishedConnection && !isEstablished()) {
Log.w(TAG, method + " failed: TTS engine connection not fully set up");
return errorResult;
}
return action.run(mService);
} catch (RemoteException ex) {
Log.e(TAG, method + " failed", ex);
if (reconnect) {
disconnect();
initTts();
}
return errorResult;
}
}
}
}
private interface Action {
R run(ITextToSpeechService service) throws RemoteException;
}
/**
* Information about an installed text-to-speech engine.
*
* @see TextToSpeech#getEngines
*/
public static class EngineInfo {
/**
* Engine package name..
*/
public String name;
/**
* Localized label for the engine.
*/
public String label;
/**
* Icon for the engine.
*/
public int icon;
/**
* Whether this engine is a part of the system
* image.
*
* @hide
*/
public boolean system;
/**
* The priority the engine declares for the the intent filter
* {@code android.intent.action.TTS_SERVICE}
*
* @hide
*/
public int priority;
@Override
public String toString() {
return "EngineInfo{name=" + name + "}";
}
}
/**
* Limit of length of input string passed to speak and synthesizeToFile.
*
* @see #speak
* @see #synthesizeToFile
*/
public static int getMaxSpeechInputLength() {
return 4000;
}
}