Develop Reference

Android TextToSpeech does not work if called directly from onCreate

This is a test activity when the button is pressed the textToSpeech works just fine, but it wont work when the function playString() is called, playString() is being called from the onCreate() of this TestActivity.
public class TestActivity extends Activity {
TextToSpeech textToSpeech;
EditText editText;
Button button;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_test);
editText=(EditText)findViewById(R.id.editText);
button=(Button)findViewById(R.id.button);
textToSpeech=new TextToSpeech(getApplicationContext(), new TextToSpeech.OnInitListener() {
#Override
public void onInit(int status) {
if(status != TextToSpeech.ERROR) {
textToSpeech.setLanguage(Locale.UK);
}
}
});
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String sentence = "Testing String";
textToSpeech.speak(sentence, TextToSpeech.QUEUE_FLUSH, null);
}
});
playString();
}
public void playString(){
String sentence = "Testing String";
textToSpeech.speak(sentence, TextToSpeech.QUEUE_FLUSH, null);
}
public void onPause(){
if(textToSpeech !=null){
textToSpeech.stop();
textToSpeech.shutdown();
}
super.onPause();
}
}

From documentation:
TextToSpeech instance can only be used to synthesize text once it has completed its initialization.
Initialization may take long time (on my device it's take ~30 seconds), so you can't use handler with some random delay.
Instead, you can place playString() in onInit block right after textToSpeech.setLanguage(Locale.UK);, so string will be played when it can be played.

Please use below code in oncreate method to call the texttospeech:
textToSpeech = new TextToSpeech(getApplicationContext(), new TextToSpeech.OnInitListener() {
#Override
public void onInit(int status) {
if (status != TextToSpeech.ERROR) {
textToSpeech.setLanguage(Locale.UK);
}
}
});
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
#Override
public void run() {
//Do something after 100ms
String sentence = "Testing String";
textToSpeech.speak(sentence, TextToSpeech.QUEUE_FLUSH, null);
}
}, 500);

Text to Speech from String array in Android?

I have created a slideshow app in Android Studio and I want the string to be converted to speech.
How do I do that? Please look at the speak() after QUEUE_FLUSH.
Thank you in advance.
public class Level1 extends Activity {
int i= 0;
static final String[] texts ={"hi", "bear", "hat"};
TextToSpeech tts;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.level1);
tts = new TextToSpeech(Level1.this, new TextToSpeech.OnInitListener() {
public void onInit(int status) {
if (status == TextToSpeech.SUCCESS) {
tts.setLanguage(Locale.US);
tts.speak(texts,TextToSpeech.QUEUE_FLUSH,????? ); //What do I put here?
} else {
Toast.makeText(getApplicationContext(),
"Feature not Supported in Your Device",
Toast.LENGTH_SHORT).show();
}
}
});
}
#Override
protected void onPause() {
if (tts!= null) {
tts.stop();
tts.shutdown();
}
super.onPause();
}

simple put null there
tts.speak(texts,TextToSpeech.QUEUE_FLUSH,null);
try this
Edit 1:
use utterancecompletelistener...it will be called once it finishes calling hi...then you can again call speak from there...and this time change the method
tts.speak(texts[1],TextToSpeech.QUEUE_ADD,null);
or you can simply concate the string array
tts.speak(texts[0]+" "+texts[1]+" "+texts[2],TextToSpeech.QUEUE_FLUSH,null);

It should be null
public class Level1 extends Activity {
int i= 0;
static final String[] texts ={"hi", "bear", "hat"};
TextToSpeech tts;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.level1);
tts = new TextToSpeech(Level1.this, new TextToSpeech.OnInitListener() {
public void onInit(int status) {
if (status == TextToSpeech.SUCCESS) {
tts.setLanguage(Locale.US);
tts.speak(texts,TextToSpeech.QUEUE_FLUSH,null); // ????--> null
} else {
Toast.makeText(getApplicationContext(),
"Feature not Supported in Your Device",
Toast.LENGTH_SHORT).show();
}
}
});
}
tts.speak(texts,TextToSpeech.QUEUE_FLUSH,null);
and if you want more reference you can find it here
public int speak (String text, int queueMode, HashMap<String, String> params)
Here
params -->
Parameters for the request. Can be null. Supported parameter names: KEY_PARAM_STREAM, KEY_PARAM_UTTERANCE_ID, KEY_PARAM_VOLUME, 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.

Text to Speech not playing sound for first time, but playing for the next time

I am using this kind of text to speech in one of my class in my app(Code edited to show outlook & exact requirement.). I will show some content on my view & if we click the button , I want to play the sound that is by using this texttospeech engine... But for First time it is not playing the sound. From the next click onwards the TEXTTOSPEECH engine is working nicely
Iwant to know how to overcome this issue....
public class LearnActivity extends Activity implements OnClickListener, OnInitListener {
AudioManager audioManager;
float volume;
TextToSpeech textToSpeech;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_learn);
textToSpeech = new TextToSpeech(this, this);
textToSpeech.setLanguage(Locale.US);
textToSpeech.setSpeechRate(0.95f);
method();
}
public void method(){
bt.setonClickListener(new onClickListener(){
public void onClick(View v){
playSound(datasource.getItemSound);
}
});
}
public void playSound(String sound){
textToSpeech.speak(sound,TextToSpeech.QUEUE_FLUSH,null);
}
#Override
public void onInit(int status) {
// TODO Auto-generated method stub
}
NOTE:- This also meet my Requirement, How to play sound from TEXTTOSPEECH engine directly without using any onClicks etc.,... because I also wants to play a startup sound that too with Android's Text-To-Speech engine only...

That's because you are clicking the button before the engine is ready.
You have to check if the TTS engine has successfully initialized on your onInit() method and enable/disable the play button accordingly.
Assuming that bt in your code is some sort of View that has setEnabled(boolean) method:
#Override
public void onInit(int status) {
bt.setEnabled(status == TextToSpeech.SUCCESS);
}
You always have to assume that the engine has not been initialized and hence keep your play button disabled by default.

I used RXJava to make a class that solves this problem. If your TTS engine is not ready when you want to use the speak method it will wait for the engine to get ready and then speaks the given string.
import android.content.Context;
import android.speech.tts.TextToSpeech;
import android.util.Pair;
import android.widget.Toast;
import java.util.Locale;
import io.reactivex.Observable;
import io.reactivex.disposables.CompositeDisposable;
import io.reactivex.schedulers.Schedulers;
import io.reactivex.subjects.PublishSubject;
public class Pronunciation {
private TextToSpeech textToSpeech;
private int languageResult;
private boolean noError;
private final String errorMessage="Something went wrong with your text to speech engine";
private PublishSubject<Boolean> engineIsReady=PublishSubject.create();
private PublishSubject<Pair<String,Integer>> speakObservable=PublishSubject.create();
private CompositeDisposable compositeDisposable=new CompositeDisposable();
public Pronunciation(Context context) {
textToSpeech=new TextToSpeech(context, status -> {
if (status!=TextToSpeech.ERROR){
languageResult= textToSpeech.setLanguage(Locale.ENGLISH);
engineIsReady.onNext(true);
} else {
Toast.makeText(context,errorMessage
,Toast.LENGTH_LONG).show();
}
});
if (languageResult==TextToSpeech.LANG_MISSING_DATA||languageResult== TextToSpeech.LANG_NOT_SUPPORTED){
noError =false;
Toast.makeText(context,errorMessage
,Toast.LENGTH_LONG).show();
}else { noError =true;}
compositeDisposable.add( Observable.combineLatest(speakObservable, engineIsReady,
(stringIntegerPair, aBoolean) -> stringIntegerPair)
.subscribeOn(Schedulers.io())
.subscribe(pair->{
if (noError)
textToSpeech.speak( (pair).first
,(pair).second,null,null);
}));
}
public void speak(String text,int queueMode){
speakObservable.onNext(new Pair<>(text,queueMode));
}
public void stop(){
if (textToSpeech!=null){
textToSpeech.stop();
textToSpeech.shutdown();
}
compositeDisposable.clear();
}
}
first add RxJava dependency in your Gradle file
implementation 'io.reactivex.rxjava2:rxandroid:2.1.1'
Then create an instance of this class in the onCreate method of your activity or fragment.Now you can pass the string and queue mode to the speak method.
pronunciation.speak("Hi", TextToSpeech.QUEUE_FLUSH));
Don't forget to call the stop method in onDestroy or onDetach to avoid memory leak
#Override
public void onDetach() {
super.onDetach();
pronunciation.stop();
}

you should write your program ...
public class MainActivity extends Activity implements TextToSpeech.OnInitListener, OnUtteranceCompletedListener {
TextToSpeech t1;
protected void onCreate(Bundle savedInstanceState) {
t1=new TextToSpeech(MainActivity.this, MainActivity.this);
}/////on creat
protected void onDestroy() {
if(t1!=null) {
t1.stop();
t1.shutdown();
t1=null;
}
super.onDestroy();
}
public void onInit(int arg0) {
t1.setOnUtteranceCompletedListener(this);
}
}//mainactivity
Add this command when button is clicked or everywhere you want to speak text.
t1.speak(text, TextToSpeech.QUEUE_FLUSH, null);

Just Put Delay For 5 Second And It's Working without any button Click
public class Final_Text_To_Speech_Activity extends AppCompatActivity implements TextToSpeech.OnInitListener {
private TextToSpeech tts; // For Text to Speech
CardView ScanProduct, SearchProduct;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tts = new TextToSpeech(this, this);
init();
// Just Put Delay For 5 Second And It's Working without any button Click
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
public void run() {
SpeakOutOnce("Welcome to Text To Speech Application");
}
}, 5000);
}
#Override
protected void onResume() {
super.onResume();
}
public void init() {
ScanProduct = (CardView) findViewById(R.id.scan_product);
SearchProduct = (CardView) findViewById(R.id.search_product);
// Search On Button Click
ScanProduct.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
speakOut("You have Just pressed Scan Option");
}
});
SearchProduct.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
speakOut("You have Just pressed Search Option ");
}
});
}
#Override
public void onDestroy() {
if (tts != null) {
tts.stop();
tts.shutdown();
}
super.onDestroy();
}
#Override
public void onInit(int status) {
int result = tts.setLanguage(Locale.US);
if (status == TextToSpeech.SUCCESS) {
if (result == TextToSpeech.LANG_MISSING_DATA || result == TextToSpeech.LANG_NOT_SUPPORTED) {
} else {
speakOut("");
}
} else if (status == TextToSpeech.ERROR) {
Toast.makeText(this, "Sorry! Text To Speech failed...",
Toast.LENGTH_LONG).show();
}
}
private void speakOut(String text) {
tts.setPitch(1.0f); //Normal Pitch
tts.setSpeechRate(0.7f); // 1.0 is Normal speech Rate
tts.speak(text, TextToSpeech.QUEUE_FLUSH, null);
}
private void SpeakOutOnce(String text) {
if (tts != null) {
tts.setPitch(1.0f); //Normal Pitch
tts.setSpeechRate(0.7f); // 1.0 is Normal speech Rate
tts.speak(text, TextToSpeech.QUEUE_FLUSH, null);
}
}
}

TTS and Singleton in Android

I have an application using TTS very heavily. It's working fine, but I need to tweak it.
I am using a TTS object in every screen and this is not good. I wish I could creat the TTS object just once (like a Singleton) and them, use it throughout all my activities.
Here is the base code for this to work:
public class SimOuNaoActivity extends Activity implements OnInitListener{
public TextToSpeech tts;
private int MY_DATA_CHECK_CODE = 0;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Intent checkIntent = new Intent();
checkIntent.setAction(TextToSpeech.Engine.ACTION_CHECK_TTS_DATA);
startActivityForResult(checkIntent, MY_DATA_CHECK_CODE);
tts.speak("Testing 1,2,3", TextToSpeech.QUEUE_ADD, null);
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == MY_DATA_CHECK_CODE) {
if (resultCode == TextToSpeech.Engine.CHECK_VOICE_DATA_PASS) {
tts = new TextToSpeech(this, this);
} else {
// missing data, install it
Intent installIntent = new Intent();
installIntent
.setAction(TextToSpeech.Engine.ACTION_INSTALL_TTS_DATA);
startActivity(installIntent);
}
}
}
#Override
public void onInit(int status) {
if (status == TextToSpeech.SUCCESS) {
// Toast.LENGTH_LONG).show();
} else if (status == TextToSpeech.ERROR) {
// Toast.LENGTH_LONG).show();
}
}
#Override
public void onDestroy() {
if (tts != null) {
tts.stop();
tts.shutdown();
}
super.onDestroy();
System.gc();
}
}
What is the correct approach to have the TTS object available in all my activities? Have in mind that it uses some methods like startActivityForResult, etc... so... I would like to know what I can do to make this work fine.
Can anyone help me, please?
Any help is appreciatted!
Thanks!

This is relatively simple - Just implement it as follows and do not forget to pass as context, the application context (this.getApplicationContext()) and not the activity context.
public class SingletonTTS {
private static SingletonTTS instance;
private static Context ctx;
private TextToSpeech mTTS;
private static boolean TTSready = false;
private SingletonTTS(Context context) {
ctx = context;
mTTS = new TextToSpeech(context, new TextToSpeech.OnInitListener() {
#Override
public void onInit(int i) {
TTSready = true;
configTTS();
}
});
}
public static synchronized SingletonTTS getInstance(Context context) {
if (instance == null) {
instance = new SingletonTTS(context);
}
return instance;
}
public static boolean isTTSready(){
return TTSready;
}
private void configTTS() {
Toast.makeText(ctx, "supports " + mTTS.isLanguageAvailable(Locale.getDefault()), Toast.LENGTH_LONG).show();
int available = mTTS.isLanguageAvailable(Locale.getDefault());
if( available != TextToSpeech.LANG_MISSING_DATA
&& available != TextToSpeech.LANG_NOT_SUPPORTED ){
mTTS.setLanguage(new Locale(Locale.getDefault().getLanguage()) );
} else {
/** TODO SAVE */
}
}
public void speakSentence(String sentence){
mTTS.speak(sentence, TextToSpeech.QUEUE_ADD, null);
}
}

Have a look here to share stuff between activities and program with nicer design in android :
Intent.putExtras size limit?

You'll likely want to instantiate and hold your Singleton object in the Application, which can only be instantiated once anyway, so just put your TTS initialisation code in a class of its own and instantiate that class as an object in your Application. You'll need to pass the Application to your TTS class as the Context that TTS will be instantiated with.
public class MyApplication extends Application {
public MyTTS myTTS;
public void onCreate() {
myTTS = new MyTTS(this);
}
}
then you can use getApplication().myTTS.whateverMethodsYouMake(yadayada) from within Activities to access the Application-Singleton-ified TTS class.

TextToSpeech API doesn't work when its called from OnStart

I'm using the TextToSpeech API in my code and it doesn't work when I try to call .speak() function from OnStart(), however it works when I call it from a button onClickListener(). Any idea why? Thank you.
public class TtsDemoActivity extends Activity {
private TextToSpeech mTts;
private OnClickListener buttonListener = new View.OnClickListener() {
#Override
public void onClick(View arg0) {
PlaySound();
}
};
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.ttsdemo);
// Initialize Text To speech
mTts = new TextToSpeech(this, new TextToSpeech.OnInitListener() {
#Override
public void onInit(int arg0) {
// TODO Auto-generated method stub
}
});
Button myButton = (Button)findViewById(R.id.buttontts1);
myButton.setOnClickListener(buttonListener);
}
#Override
protected void onStart() {
// TODO Auto-generated method stub
super.onStart();
PlaySound();
}
protected void PlaySound()
{
String word = "Hello world";
mTts.speak(word, TextToSpeech.QUEUE_FLUSH, null);
}

You must wait until the TTS subsystem signals that it is ready: if it isn't ready when onStart is called, it will fail. If you are trying to speak as soon as it is ready call PlaySound from inside the OnInitListener:
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.ttsdemo);
// Initialize Text To speech
mTts = new TextToSpeech(this, new TextToSpeech.OnInitListener() {
#Override
public void onInit(int arg0) {
if(arg0 == TextToSpeech.SUCCESS) PlaySound();
}
});
Button myButton = (Button)findViewById(R.id.buttontts1);
myButton.setOnClickListener(buttonListener);
}

Maybe I am blind, but in your onStart method, you aren't ever calling
PlaySound()
Like you are in
#Override
public void onClick(View arg0) {
PlaySound();
}