TextToSpeech
public
class
TextToSpeech
extends Object
| java.lang.Object | |
| ↳ | android.speech.tts.TextToSpeech |
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 TextToSpeech.OnInitListener to be
notified of the completion of the initialization.
When you are done using the TextToSpeech instance, call the shutdown() method
to release the native resources used by the TextToSpeech engine.
Apps targeting Android 11 that use text-to-speech should declare TextToSpeech.Engine.INTENT_ACTION_TTS_SERVICE in the queries elements of their
manifest:
<queries>
...
<intent>
<action android:name="android.intent.action.TTS_SERVICE" />
</intent>
</queries>
Summary
Nested classes | |
|---|---|
class |
TextToSpeech.Engine
Constants and parameter names for controlling text-to-speech. |
class |
TextToSpeech.EngineInfo
Information about an installed text-to-speech engine. |
interface |
TextToSpeech.OnInitListener
Interface definition of a callback to be invoked indicating the completion of the TextToSpeech engine initialization. |
interface |
TextToSpeech.OnUtteranceCompletedListener
This interface was deprecated
in API level 18.
Use |
Constants | |
|---|---|
String |
ACTION_TTS_QUEUE_PROCESSING_COMPLETED
Broadcast Action: The TextToSpeech synthesizer has completed processing of all the text in the speech queue. |
int |
ERROR
Denotes a generic operation failure. |
int |
ERROR_INVALID_REQUEST
Denotes a failure caused by an invalid request. |
int |
ERROR_NETWORK
Denotes a failure caused by a network connectivity problems. |
int |
ERROR_NETWORK_TIMEOUT
Denotes a failure caused by network timeout. |
int |
ERROR_NOT_INSTALLED_YET
Denotes a failure caused by an unfinished download of the voice data. |
int |
ERROR_OUTPUT
Denotes a failure related to the output (audio device or a file). |
int |
ERROR_SERVICE
Denotes a failure of a TTS service. |
int |
ERROR_SYNTHESIS
Denotes a failure of a TTS engine to synthesize the given input. |
int |
LANG_AVAILABLE
Denotes the language is available for the language by the locale, but not the country and variant. |
int |
LANG_COUNTRY_AVAILABLE
Denotes the language is available for the language and country specified by the locale, but not the variant. |
int |
LANG_COUNTRY_VAR_AVAILABLE
Denotes the language is available exactly as specified by the locale. |
int |
LANG_MISSING_DATA
Denotes the language data is missing. |
int |
LANG_NOT_SUPPORTED
Denotes the language is not supported. |
int |
QUEUE_ADD
Queue mode where the new entry is added at the end of the playback queue. |
int |
QUEUE_FLUSH
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. |
int |
STOPPED
Denotes a stop requested by a client. |
int |
SUCCESS
Denotes a successful operation. |
Public constructors | |
|---|---|
TextToSpeech(Context context, TextToSpeech.OnInitListener listener)
The constructor for the TextToSpeech class, using the default TTS engine. |
|
TextToSpeech(Context context, TextToSpeech.OnInitListener listener, String engine)
The constructor for the TextToSpeech class, using the given TTS engine. |
|
Public methods | |
|---|---|
int
|
addEarcon(String earcon, String packagename, int resourceId)
Adds a mapping between a string of text and a sound resource in a package. |
int
|
addEarcon(String earcon, String filename)
This method was deprecated
in API level 21.
As of API level 21, replaced by
|
int
|
addEarcon(String earcon, File file)
Adds a mapping between a string of text and a sound file. |
int
|
addEarcon(String earcon, Uri uri)
Adds a mapping between a string of text and a sound file. |
int
|
addSpeech(CharSequence text, File file)
Adds a mapping between a CharSequence (may be spanned with TtsSpans) and a sound file. |
int
|
addSpeech(String text, String packagename, int resourceId)
Adds a mapping between a string of text and a sound resource in a package. |
int
|
addSpeech(CharSequence text, String packagename, int resourceId)
Adds a mapping between a CharSequence (may be spanned with TtsSpans) of text and a sound resource in a package. |
int
|
addSpeech(String text, String filename)
Adds a mapping between a string of text and a sound file. |
int
|
addSpeech(CharSequence text, Uri uri)
Adds a mapping between a CharSequence (may be spanned with TtsSpans) and a sound file. |
boolean
|
areDefaultsEnforced()
Checks whether the user's settings should override settings requested by the calling application. |
Set<Locale>
|
getAvailableLanguages()
Query the engine about the set of available languages. |
String
|
getDefaultEngine()
Gets the package name of the default speech synthesis engine. |
Locale
|
getDefaultLanguage()
This method was deprecated
in API level 21.
As of API level 21, use |
Voice
|
getDefaultVoice()
Returns a Voice instance that's the default voice for the default Text-to-speech language. |
List<TextToSpeech.EngineInfo>
|
getEngines()
Gets a list of all installed TTS engines. |
Set<String>
|
getFeatures(Locale locale)
This method was deprecated
in API level 21.
As of API level 21, please use voices. In order to query features of the voice,
call |
Locale
|
getLanguage()
This method was deprecated
in API level 21.
As of API level 21, please use |
static
int
|
getMaxSpeechInputLength()
Limit of length of input string passed to speak and synthesizeToFile. |
Voice
|
getVoice()
Returns a Voice instance describing the voice currently being used for synthesis requests sent to the TextToSpeech engine. |
Set<Voice>
|
getVoices()
Query the engine about the set of available voices. |
int
|
isLanguageAvailable(Locale loc)
Checks if the specified language as represented by the Locale is available and supported. |
boolean
|
isSpeaking()
Checks whether the TTS engine is busy speaking. |
int
|
playEarcon(String earcon, int queueMode, HashMap<String, String> params)
This method was deprecated
in API level 21.
As of API level 21, replaced by
|
int
|
playEarcon(String earcon, int queueMode, Bundle params, String utteranceId)
Plays the earcon using the specified queueing mode and parameters. |
int
|
playSilence(long durationInMs, int queueMode, HashMap<String, String> params)
This method was deprecated
in API level 21.
As of API level 21, replaced by
|
int
|
playSilentUtterance(long durationInMs, int queueMode, String utteranceId)
Plays silence for the specified amount of time using the specified queue mode. |
int
|
setAudioAttributes(AudioAttributes audioAttributes)
Sets the audio attributes to be used when speaking text or playing back a file. |
int
|
setEngineByPackageName(String enginePackageName)
This method was deprecated
in API level 15.
This doesn't inform callers when the TTS engine has been
initialized. |
int
|
setLanguage(Locale loc)
Sets the text-to-speech language. |
int
|
setOnUtteranceCompletedListener(TextToSpeech.OnUtteranceCompletedListener listener)
This method was deprecated
in API level 15.
Use |
int
|
setOnUtteranceProgressListener(UtteranceProgressListener listener)
Sets the listener that will be notified of various events related to the synthesis of a given utterance. |
int
|
setPitch(float pitch)
Sets the speech pitch for the TextToSpeech engine. |
int
|
setSpeechRate(float speechRate)
Sets the speech rate. |
int
|
setVoice(Voice voice)
Sets the text-to-speech voice. |
void
|
shutdown()
Releases the resources used by the TextToSpeech engine. |
int
|
speak(CharSequence text, int queueMode, Bundle params, String utteranceId)
Speaks the text using the specified queuing strategy and speech parameters, the text may be spanned with TtsSpans. |
int
|
speak(String text, int queueMode, HashMap<String, String> params)
This method was deprecated
in API level 21.
As of API level 21, replaced by
|
int
|
stop()
Interrupts the current utterance (whether played or rendered to file) and discards other utterances in the queue. |
int
|
synthesizeToFile(CharSequence text, Bundle params, ParcelFileDescriptor fileDescriptor, String utteranceId)
Synthesizes the given text to a ParcelFileDescriptor using the specified parameters. |
int
|
synthesizeToFile(CharSequence text, Bundle params, File file, String utteranceId)
Synthesizes the given text to a file using the specified parameters. |
int
|
synthesizeToFile(String text, HashMap<String, String> params, String filename)
This method was deprecated
in API level 21.
As of API level 21, replaced by
|
Inherited methods | |
|---|---|
Constants
ACTION_TTS_QUEUE_PROCESSING_COMPLETED
public static final String ACTION_TTS_QUEUE_PROCESSING_COMPLETED
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
OnUtteranceCompletedListener.
Constant Value: "android.speech.tts.TTS_QUEUE_PROCESSING_COMPLETED"
ERROR
public static final int ERROR
Denotes a generic operation failure.
Constant Value: -1 (0xffffffff)
ERROR_INVALID_REQUEST
public static final int ERROR_INVALID_REQUEST
Denotes a failure caused by an invalid request.
Constant Value: -8 (0xfffffff8)
ERROR_NETWORK
public static final int ERROR_NETWORK
Denotes a failure caused by a network connectivity problems.
Constant Value: -6 (0xfffffffa)
ERROR_NETWORK_TIMEOUT
public static final int ERROR_NETWORK_TIMEOUT
Denotes a failure caused by network timeout.
Constant Value: -7 (0xfffffff9)
ERROR_NOT_INSTALLED_YET
public static final int ERROR_NOT_INSTALLED_YET
Denotes a failure caused by an unfinished download of the voice data.
Constant Value: -9 (0xfffffff7)
ERROR_OUTPUT
public static final int ERROR_OUTPUT
Denotes a failure related to the output (audio device or a file).
Constant Value: -5 (0xfffffffb)
ERROR_SERVICE
public static final int ERROR_SERVICE
Denotes a failure of a TTS service.
Constant Value: -4 (0xfffffffc)
ERROR_SYNTHESIS
public static final int ERROR_SYNTHESIS
Denotes a failure of a TTS engine to synthesize the given input.
Constant Value: -3 (0xfffffffd)
LANG_AVAILABLE
public static final int LANG_AVAILABLE
Denotes the language is available for the language by the locale, but not the country and variant.
Constant Value: 0 (0x00000000)
LANG_COUNTRY_AVAILABLE
public static final int LANG_COUNTRY_AVAILABLE
Denotes the language is available for the language and country specified by the locale, but not the variant.
Constant Value: 1 (0x00000001)
LANG_COUNTRY_VAR_AVAILABLE
public static final int LANG_COUNTRY_VAR_AVAILABLE
Denotes the language is available exactly as specified by the locale.
Constant Value: 2 (0x00000002)
LANG_MISSING_DATA
public static final int LANG_MISSING_DATA
Denotes the language data is missing.
Constant Value: -1 (0xffffffff)
LANG_NOT_SUPPORTED
public static final int LANG_NOT_SUPPORTED
Denotes the language is not supported.
Constant Value: -2 (0xfffffffe)
QUEUE_ADD
public static final int QUEUE_ADD
Queue mode where the new entry is added at the end of the playback queue.
Constant Value: 1 (0x00000001)
QUEUE_FLUSH
public static final int QUEUE_FLUSH
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.
Constant Value: 0 (0x00000000)
STOPPED
public static final int STOPPED
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.
Constant Value: -2 (0xfffffffe)
SUCCESS
public static final int SUCCESS
Denotes a successful operation.
Constant Value: 0 (0x00000000)
Public constructors
TextToSpeech
public TextToSpeech (Context context, TextToSpeech.OnInitListener listener)
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.
| Parameters | |
|---|---|
context |
Context: The context this instance is running in. |
listener |
TextToSpeech.OnInitListener: The 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. |
TextToSpeech
public TextToSpeech (Context context, TextToSpeech.OnInitListener listener, String engine)
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.
| Parameters | |
|---|---|
context |
Context: The context this instance is running in. |
listener |
TextToSpeech.OnInitListener: The 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. |
engine |
String: Package name of the TTS engine to use. |
Public methods
addEarcon
public int addEarcon (String earcon, String packagename, int resourceId)
Adds a mapping between a string of text and a sound resource in a package. Use this to add custom earcons.
| Parameters | |
|---|---|
earcon |
String: The name of the earcon.
Example: "[tick]" |
packagename |
String: 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.
|
resourceId |
int: Example: R.raw.tick_snd |
| Returns | |
|---|---|
int |
Code indicating success or failure. See ERROR and SUCCESS. |
See also:
addEarcon
public int addEarcon (String earcon, String filename)
This method was deprecated
in API level 21.
As of API level 21, replaced by
addEarcon(java.lang.String, java.io.File).
Adds a mapping between a string of text and a sound file. Use this to add custom earcons.
| Parameters | |
|---|---|
earcon |
String: The name of the earcon.
Example: "[tick]" |
filename |
String: The full path to the sound file (for example:
"/sdcard/mysounds/tick.wav") |
| Returns | |
|---|---|
int |
Code indicating success or failure. See ERROR and SUCCESS. |
See also:
addEarcon
public int addEarcon (String earcon, File file)
Adds a mapping between a string of text and a sound file. Use this to add custom earcons.
| Parameters | |
|---|---|
earcon |
String: The name of the earcon.
Example: "[tick]" |
file |
File: File object pointing to the sound file. |
| Returns | |
|---|---|
int |
Code indicating success or failure. See ERROR and SUCCESS. |
See also:
addEarcon
public int addEarcon (String earcon, Uri uri)
Adds a mapping between a string of text and a sound file. Use this to add custom earcons.
| Parameters | |
|---|---|
earcon |
String: The name of the earcon.
Example: "[tick]"
This value cannot be null. |
uri |
Uri: Uri object pointing to the sound file.
This value cannot be null. |
| Returns | |
|---|---|
int |
Code indicating success or failure. See ERROR and SUCCESS. |
See also:
addSpeech
public int addSpeech (CharSequence text, File file)
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 speak(java.lang.CharSequence, int, android.os.Bundle, java.lang.String)
will play the specified sound resource if it is available, or synthesize the text it is
missing.
| Parameters | |
|---|---|
text |
CharSequence: The string of text. Example: "south_south_east" |
file |
File: File object pointing to the sound file. |
| Returns | |
|---|---|
int |
Code indicating success or failure. See ERROR and SUCCESS. |
addSpeech
public int addSpeech (String text, String packagename, int resourceId)
Adds a mapping between a string of text and a sound resource in a
package. After a call to this method, subsequent calls to
speak(java.lang.CharSequence, int, android.os.Bundle, java.lang.String) will play the specified sound resource
if it is available, or synthesize the text it is missing.
| Parameters | |
|---|---|
text |
String: The string of text. Example: "south_south_east" |
packagename |
String: 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.
|
resourceId |
int: Example: R.raw.south_south_east |
| Returns | |
|---|---|
int |
Code indicating success or failure. See ERROR and SUCCESS. |
addSpeech
public int addSpeech (CharSequence text, String packagename, int resourceId)
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
speak(java.lang.CharSequence, int, android.os.Bundle, java.lang.String) will play the specified sound resource
if it is available, or synthesize the text it is missing.
| Parameters | |
|---|---|
text |
CharSequence: The string of text. Example: "south_south_east" |
packagename |
String: 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.
|
resourceId |
int: Example: R.raw.south_south_east |
| Returns | |
|---|---|
int |
Code indicating success or failure. See ERROR and SUCCESS. |
addSpeech
public int addSpeech (String text, String filename)
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 speak(java.lang.CharSequence, int, android.os.Bundle, java.lang.String) will play the specified sound
resource if it is available, or synthesize the text it is missing.
| Parameters | |
|---|---|
text |
String: The string of text. Example: "south_south_east" |
filename |
String: The full path to the sound file (for example:
"/sdcard/mysounds/hello.wav") |
| Returns | |
|---|---|
int |
Code indicating success or failure. See ERROR and SUCCESS. |
addSpeech
public int addSpeech (CharSequence text, Uri uri)
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 speak(java.lang.CharSequence, int, android.os.Bundle, java.lang.String)
will play the specified sound resource if it is available, or synthesize the text it is
missing.
| Parameters | |
|---|---|
text |
CharSequence: The string of text. Example: "south_south_east"
This value cannot be null. |
uri |
Uri: Uri object pointing to the sound file.
This value cannot be null. |
| Returns | |
|---|---|
int |
Code indicating success or failure. See ERROR and SUCCESS. |
areDefaultsEnforced
public boolean areDefaultsEnforced ()
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.
| Returns | |
|---|---|
boolean |
|
getAvailableLanguages
public Set<Locale> getAvailableLanguages ()
Query the engine about the set of available languages.
| Returns | |
|---|---|
Set<Locale> |
|
getDefaultEngine
public String getDefaultEngine ()
Gets the package name of the default speech synthesis engine.
| Returns | |
|---|---|
String |
Package name of the TTS engine that the user has chosen as their default. |
getDefaultLanguage
public Locale getDefaultLanguage ()
This method was deprecated
in API level 21.
As of API level 21, use getDefaultVoice().getLocale() (getDefaultVoice())
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 getLanguage(). Please refer to getLanguage() for more information.
| Returns | |
|---|---|
Locale |
language, country (if any) and variant (if any) used by the client stored in a
Locale instance, or null on error. |
getDefaultVoice
public Voice getDefaultVoice ()
Returns a Voice instance that's the default voice for the default Text-to-speech language.
| Returns | |
|---|---|
Voice |
The default voice instance for the default language, or null if not set or
on error. |
getEngines
public List<TextToSpeech.EngineInfo> getEngines ()
Gets a list of all installed TTS engines.
| Returns | |
|---|---|
List<TextToSpeech.EngineInfo> |
A list of engine info objects. The list can be empty, but never null. |
getFeatures
public Set<String> getFeatures (Locale locale)
This method was deprecated
in API level 21.
As of API level 21, please use voices. In order to query features of the voice,
call getVoices() to retrieve the list of available voices and
Voice#getFeatures() to retrieve the set of features.
Queries the engine for the set of features it supports for a given locale.
Features can either be framework defined, e.g.
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
TextToSpeech#speak(String, int, java.util.HashMap) and
TextToSpeech#synthesizeToFile(String, java.util.HashMap, String).
Features values are strings and their values must meet restrictions described in their
documentation.
| Parameters | |
|---|---|
locale |
Locale: The locale to query features for. |
| Returns | |
|---|---|
Set<String> |
Set instance. May return null on error. |
getLanguage
public Locale getLanguage ()
This method was deprecated
in API level 21.
As of API level 21, please use getVoice().getLocale()
(getVoice()).
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 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 TextToSpeech#setLanguage call on this instance.
If a voice is set (by setVoice(android.speech.tts.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).
| Returns | |
|---|---|
Locale |
language, country (if any) and variant (if any) used by the client stored in a
Locale instance, or null on error. |
getMaxSpeechInputLength
public static int getMaxSpeechInputLength ()
Limit of length of input string passed to speak and synthesizeToFile.
| Returns | |
|---|---|
int |
|
getVoice
public Voice getVoice ()
Returns a Voice instance describing the voice currently being used for synthesis requests sent to the TextToSpeech engine.
| Returns | |
|---|---|
Voice |
Voice instance used by the client, or null if not set or on error. |
See also:
getVoices
public Set<Voice> getVoices ()
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.
| Returns | |
|---|---|
Set<Voice> |
|
See also:
isLanguageAvailable
public int isLanguageAvailable (Locale loc)
Checks if the specified language as represented by the Locale is available and supported.
| Parameters | |
|---|---|
loc |
Locale: The Locale describing the language to be used. |
| Returns | |
|---|---|
int |
Code indicating the support status for the locale. See LANG_AVAILABLE,
LANG_COUNTRY_AVAILABLE, LANG_COUNTRY_VAR_AVAILABLE,
LANG_MISSING_DATA and LANG_NOT_SUPPORTED. |
isSpeaking
public boolean isSpeaking ()
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.
| Returns | |
|---|---|
boolean |
true if the TTS engine is speaking. |
playEarcon
public int playEarcon (String earcon, int queueMode, HashMap<String, String> params)
This method was deprecated
in API level 21.
As of API level 21, replaced by
playEarcon(java.lang.String, int, android.os.Bundle, java.lang.String).
Plays the earcon using the specified queueing mode and parameters.
The earcon must already have been added with addEarcon(java.lang.String, java.lang.String) or
addEarcon(java.lang.String, java.lang.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
setOnUtteranceProgressListener(UtteranceProgressListener)) and using the
Engine#KEY_PARAM_UTTERANCE_ID parameter.
| Parameters | |
|---|---|
earcon |
String: The earcon that should be played |
queueMode |
int: QUEUE_ADD or QUEUE_FLUSH. |
params |
HashMap: Parameters for the request. Can be null.
Supported parameter names:
Engine#KEY_PARAM_STREAM,
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. |
| Returns | |
|---|---|
int |
ERROR or SUCCESS of queuing the playEarcon operation. |
playEarcon
public int playEarcon (String earcon, int queueMode, Bundle params, String utteranceId)
Plays the earcon using the specified queueing mode and parameters.
The earcon must already have been added with addEarcon(java.lang.String, java.lang.String) or
addEarcon(java.lang.String, java.lang.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
setOnUtteranceProgressListener(UtteranceProgressListener)) and using the
Engine#KEY_PARAM_UTTERANCE_ID parameter.
| Parameters | |
|---|---|
earcon |
String: The earcon that should be played |
queueMode |
int: QUEUE_ADD or QUEUE_FLUSH. |
params |
Bundle: Parameters for the request. Can be null.
Supported parameter names:
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. |
utteranceId |
String |
| Returns | |
|---|---|
int |
ERROR or SUCCESS of queuing the playEarcon operation. |
playSilence
public int playSilence (long durationInMs,
int queueMode,
HashMap<String, String> params)
This method was deprecated
in API level 21.
As of API level 21, replaced by
playSilentUtterance(long, int, java.lang.String).
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
setOnUtteranceProgressListener(UtteranceProgressListener)) and using the
Engine#KEY_PARAM_UTTERANCE_ID parameter.
| Parameters | |
|---|---|
durationInMs |
long: The duration of the silence. |
queueMode |
int: QUEUE_ADD or QUEUE_FLUSH. |
params |
HashMap: Parameters for the request. Can be null.
Supported parameter names:
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. |
| Returns | |
|---|---|
int |
ERROR or SUCCESS of queuing the playSilence operation. |
playSilentUtterance
public int playSilentUtterance (long durationInMs,
int queueMode,
String utteranceId)
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
setOnUtteranceProgressListener(UtteranceProgressListener)) and using the
Engine#KEY_PARAM_UTTERANCE_ID parameter.
| Parameters | |
|---|---|
durationInMs |
long: The duration of the silence. |
queueMode |
int: QUEUE_ADD or QUEUE_FLUSH. |
utteranceId |
String: An unique identifier for this request. |
| Returns | |
|---|---|
int |
ERROR or SUCCESS of queuing the playSilentUtterance operation. |
setAudioAttributes
public int setAudioAttributes (AudioAttributes audioAttributes)
Sets the audio attributes to be used when speaking text or playing back a file.
| Parameters | |
|---|---|
audioAttributes |
AudioAttributes: Valid AudioAttributes instance. |
| Returns | |
|---|---|
int |
ERROR or SUCCESS. |
setEngineByPackageName
public int setEngineByPackageName (String enginePackageName)
This method was deprecated
in API level 15.
This doesn't inform callers when the TTS engine has been
initialized. TextToSpeech(android.content.Context, android.speech.tts.TextToSpeech.OnInitListener, java.lang.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.
Sets the TTS engine to use.
| Parameters | |
|---|---|
enginePackageName |
String: The package name for the synthesis engine (e.g. "com.svox.pico") |
| Returns | |
|---|---|
int |
ERROR or SUCCESS. |
setLanguage
public int setLanguage (Locale loc)
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 isLanguageAvailable(java.util.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;
getVoice() can be used to retrieve it.
| Parameters | |
|---|---|
loc |
Locale: The locale describing the language to be used. |
| Returns | |
|---|---|
int |
Code indicating the support status for the locale. See LANG_AVAILABLE,
LANG_COUNTRY_AVAILABLE, LANG_COUNTRY_VAR_AVAILABLE,
LANG_MISSING_DATA and LANG_NOT_SUPPORTED. |
setOnUtteranceCompletedListener
public int setOnUtteranceCompletedListener (TextToSpeech.OnUtteranceCompletedListener listener)
This method was deprecated
in API level 15.
Use setOnUtteranceProgressListener(android.speech.tts.UtteranceProgressListener)
instead.
Sets the listener that will be notified when synthesis of an utterance completes.
| Parameters | |
|---|---|
listener |
TextToSpeech.OnUtteranceCompletedListener: The listener to use. |
| Returns | |
|---|---|
int |
ERROR or SUCCESS. |
setOnUtteranceProgressListener
public int setOnUtteranceProgressListener (UtteranceProgressListener listener)
Sets the listener that will be notified of various events related to the
synthesis of a given utterance.
See UtteranceProgressListener and
TextToSpeech.Engine#KEY_PARAM_UTTERANCE_ID.
| Parameters | |
|---|---|
listener |
UtteranceProgressListener: the listener to use. |
| Returns | |
|---|---|
int |
ERROR or SUCCESS |
setPitch
public int setPitch (float pitch)
Sets the speech pitch for the TextToSpeech engine. This has no effect on any pre-recorded speech.
| Parameters | |
|---|---|
pitch |
float: Speech pitch. 1.0 is the normal pitch,
lower values lower the tone of the synthesized voice,
greater values increase it. |
| Returns | |
|---|---|
int |
ERROR or SUCCESS. |
setSpeechRate
public int setSpeechRate (float speechRate)
Sets the speech rate. This has no effect on any pre-recorded speech.
| Parameters | |
|---|---|
speechRate |
float: Speech rate. 1.0 is the normal speech rate,
lower values slow down the speech (0.5 is half the normal speech rate),
greater values accelerate it (2.0 is twice the normal speech rate). |
| Returns | |
|---|---|
int |
ERROR or SUCCESS. |
setVoice
public int setVoice (Voice voice)
Sets the text-to-speech voice.
| Parameters | |
|---|---|
voice |
Voice: One of objects returned by getVoices(). |
| Returns | |
|---|---|
int |
ERROR or SUCCESS. |
See also:
shutdown
public void shutdown ()
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.
speak
public int speak (CharSequence text, int queueMode, Bundle params, String utteranceId)
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
setOnUtteranceProgressListener(UtteranceProgressListener)) and using the
Engine#KEY_PARAM_UTTERANCE_ID parameter.
| Parameters | |
|---|---|
text |
CharSequence: The string of text to be spoken. No longer than
getMaxSpeechInputLength() characters. |
queueMode |
int: The queuing strategy to use, QUEUE_ADD or QUEUE_FLUSH. |
params |
Bundle: Parameters for the request. Can be null.
Supported parameter names:
Engine#KEY_PARAM_STREAM,
Engine#KEY_PARAM_VOLUME,
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. |
utteranceId |
String: An unique identifier for this request. |
| Returns | |
|---|---|
int |
ERROR or SUCCESS of queuing the speak operation. |
speak
public int speak (String text, int queueMode, HashMap<String, String> params)
This method was deprecated
in API level 21.
As of API level 21, replaced by
speak(java.lang.CharSequence, int, android.os.Bundle, java.lang.String).
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
setOnUtteranceProgressListener(UtteranceProgressListener)) and using the
Engine#KEY_PARAM_UTTERANCE_ID parameter.
| Parameters | |
|---|---|
text |
String: The string of text to be spoken. No longer than
getMaxSpeechInputLength() characters. |
queueMode |
int: The queuing strategy to use, QUEUE_ADD or QUEUE_FLUSH. |
params |
HashMap: Parameters for the request. Can be null.
Supported parameter names:
Engine#KEY_PARAM_STREAM,
Engine#KEY_PARAM_UTTERANCE_ID,
Engine#KEY_PARAM_VOLUME,
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. |
| Returns | |
|---|---|
int |
ERROR or SUCCESS of queuing the speak operation. |
stop
public int stop ()
Interrupts the current utterance (whether played or rendered to file) and discards other utterances in the queue.
| Returns | |
|---|---|
int |
ERROR or SUCCESS. |
synthesizeToFile
public int synthesizeToFile (CharSequence text, Bundle params, ParcelFileDescriptor fileDescriptor, String utteranceId)
Synthesizes the given text to a ParcelFileDescriptor 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
setOnUtteranceProgressListener(UtteranceProgressListener)).
| Parameters | |
|---|---|
text |
CharSequence: The text that should be synthesized. No longer than
getMaxSpeechInputLength() characters.
This value cannot be null. |
params |
Bundle: Parameters for the request.
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.
This value cannot be null. |
fileDescriptor |
ParcelFileDescriptor: ParcelFileDescriptor to write the generated audio data to.
This value cannot be null. |
utteranceId |
String: An unique identifier for this request.
This value cannot be null. |
| Returns | |
|---|---|
int |
ERROR or SUCCESS of queuing the synthesizeToFile operation. |
synthesizeToFile
public int synthesizeToFile (CharSequence text, Bundle params, File file, String utteranceId)
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
setOnUtteranceProgressListener(UtteranceProgressListener)).
| Parameters | |
|---|---|
text |
CharSequence: The text that should be synthesized. No longer than
getMaxSpeechInputLength() characters. |
params |
Bundle: Parameters for the request. Cannot 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. |
file |
File: File to write the generated audio data to. |
utteranceId |
String: An unique identifier for this request. |
| Returns | |
|---|---|
int |
ERROR or SUCCESS of queuing the synthesizeToFile operation. |
synthesizeToFile
public int synthesizeToFile (String text, HashMap<String, String> params, String filename)
This method was deprecated
in API level 21.
As of API level 21, replaced by
synthesizeToFile(java.lang.CharSequence, android.os.Bundle, java.io.File, java.lang.String).
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
setOnUtteranceProgressListener(UtteranceProgressListener)) and using the
Engine#KEY_PARAM_UTTERANCE_ID parameter.
| Parameters | |
|---|---|
text |
String: The text that should be synthesized. No longer than
getMaxSpeechInputLength() characters. |
params |
HashMap: Parameters for the request. Cannot be null.
Supported parameter names:
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. |
filename |
String: Absolute file filename to write the generated audio data to.It should be
something like "/sdcard/myappsounds/mysound.wav". |
| Returns | |
|---|---|
int |
ERROR or SUCCESS of queuing the synthesizeToFile operation. |
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Last updated 2024-04-11 UTC.