Android Text to Speech Tutorial with Examples
1. Overview
Converting text into speech is a feature included in Android from API 21 which allows you to transfer a text to speech. It supports many different languages. To perform this function you need to use android.speech.tts.TextToSpeech class.
To Android API Level 23, these locales below will be supported:
- en_US
- de_DE
- fr
- es_ES
- de
- en
- it_IT
- it
- en_GB
- es
- fr_FR
2. Text To Speech example
No ADS
Create a project named TextToSpeechDemo:
If you are interested in the design steps of this application interface, please see the appendix at the end of the article.
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/ConstraintLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<RadioGroup
android:id="@+id/radioGroup"
android:layout_width="0dp"
android:layout_height="160dp"
android:layout_marginStart="16dp"
android:layout_marginLeft="16dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="14dp"
android:layout_marginRight="14dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<RadioButton
android:id="@+id/radio_en"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="English" />
<RadioButton
android:id="@+id/radio_fr"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="France" />
</RadioGroup>
<EditText
android:id="@+id/editText"
android:layout_width="0dp"
android:layout_height="49dp"
android:layout_marginStart="18dp"
android:layout_marginLeft="18dp"
android:layout_marginTop="80dp"
android:layout_marginEnd="17dp"
android:layout_marginRight="17dp"
android:ems="10"
android:inputType="textPersonName"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/radioGroup" />
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="88dp"
android:text="Speak"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/editText" />
</androidx.constraintlayout.widget.ConstraintLayout>
Min SDK Level
Text To Speech requires Android API Level> = 21 so you need to configure in build.gradle (Module: app) file
minSdkVersion 21
MainActivity.java
package org.o7planning.texttospeechdemo;
import android.app.Activity;
import android.os.Bundle;
import android.speech.tts.TextToSpeech;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import java.util.Locale;
import java.util.Set;
import java.util.UUID;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Toast;
public class MainActivity extends Activity {
private TextToSpeech textToSpeech;
private EditText editText;
private Button button;
private RadioButton radio_en;
private RadioButton radio_fr;
RadioGroup radioGroup;
private boolean ready;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
editText = (EditText) findViewById(R.id.editText);
button = (Button) findViewById(R.id.button);
radio_en = (RadioButton) findViewById(R.id.radio_en);
radio_fr = (RadioButton) findViewById(R.id.radio_fr);
radioGroup = (RadioGroup) findViewById(R.id.radioGroup);
textToSpeech = new TextToSpeech(getApplicationContext(), new TextToSpeech.OnInitListener() {
@Override
public void onInit(int status) {
Log.e("TTS", "TextToSpeech.OnInitListener.onInit...");
printOutSupportedLanguages();
setTextToSpeechLanguage();
}
});
radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
setTextToSpeechLanguage();
}
});
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
speakOut();
}
});
}
private void printOutSupportedLanguages() {
// Supported Languages
Set<Locale> supportedLanguages = textToSpeech.getAvailableLanguages();
if(supportedLanguages!= null) {
for (Locale lang : supportedLanguages) {
Log.e("TTS", "Supported Language: " + lang);
}
}
}
@Override
public void onPause() {
if (textToSpeech != null) {
textToSpeech.stop();
textToSpeech.shutdown();
}
super.onPause();
}
private void speakOut() {
if (!ready) {
Toast.makeText(this, "Text to Speech not ready", Toast.LENGTH_LONG).show();
return;
}
// Text to Speak
String toSpeak = editText.getText().toString();
Toast.makeText(this, toSpeak, Toast.LENGTH_SHORT).show();
// A random String (Unique ID).
String utteranceId = UUID.randomUUID().toString();
textToSpeech.speak(toSpeak, TextToSpeech.QUEUE_FLUSH, null, utteranceId);
}
private Locale getUserSelectedLanguage() {
int checkedRadioId = this.radioGroup.getCheckedRadioButtonId();
if (checkedRadioId == R.id.radio_en) {
return Locale.ENGLISH;
} else if (checkedRadioId == R.id.radio_fr) {
return Locale.FRANCE;
}
return null;
}
private void setTextToSpeechLanguage() {
Locale language = this.getUserSelectedLanguage();
if (language == null) {
this.ready = false;
Toast.makeText(this, "Not language selected", Toast.LENGTH_SHORT).show();
return;
}
int result = textToSpeech.setLanguage(language);
if (result == TextToSpeech.LANG_MISSING_DATA) {
this.ready = false;
Toast.makeText(this, "Missing language data", Toast.LENGTH_SHORT).show();
return;
} else if (result == TextToSpeech.LANG_NOT_SUPPORTED) {
this.ready = false;
Toast.makeText(this, "Language not supported", Toast.LENGTH_SHORT).show();
return;
} else {
this.ready = true;
Locale currentLanguage = textToSpeech.getVoice().getLocale();
Toast.makeText(this, "Language " + currentLanguage, Toast.LENGTH_SHORT).show();
}
}
}
Running apps:
No ADS
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