Android Text to Speech(TTS) Text to Speech Base
Example
layout_text_to_speech.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="16dp">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Enter text here!"
android:id="@+id/textToSpeak"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_below="@id/textToSpeak"
android:id="@+id/btnSpeak"/>
</RelativeLayout>
AndroidTextToSpeechActivity.java
public class AndroidTextToSpeechActivity extends Activity implements
TextToSpeech.OnInitListener {
EditText textToSpeak = null;
Button btnSpeak = null;
TextToSpeech tts;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
textToSpeak = findViewById(R.id.textToSpeak);
btnSpeak = findViewById(R.id.btnSpeak);
btnSpeak.setEnabled(false);
tts = new TextToSpeech(this, this);
btnSpeak.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
speakOut();
}
});
}
@Override
public void onDestroy() {
// Don't forget to shutdown tts!
if (tts != null) {
tts.stop();
tts.shutdown();
}
super.onDestroy();
}
@Override
public void onInit(int status) {
if (status == TextToSpeech.SUCCESS) {
int result = tts.setLanguage(Locale.US);
if (result == TextToSpeech.LANG_MISSING_DATA
|| result == TextToSpeech.LANG_NOT_SUPPORTED) {
Log.e("TTS", "This Language is not supported");
} else {
btnSpeak.setEnabled(true);
speakOut();
}
} else {
Log.e("TTS", "Initilization Failed!");
}
}
private void speakOut() {
String text = textToSpeak.getText().toString();
if(text == null || text.isEmpty())
return;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
String utteranceId=this.hashCode() + "";
tts.speak(text, TextToSpeech.QUEUE_FLUSH, null, utteranceId);
} else {
tts.speak(text, TextToSpeech.QUEUE_FLUSH, null);
}
}
}
The language to be spoken can be set by providing a Locale to the setLanguage() method:
tts.setLanguage(Locale.CHINESE); // Chinese language
The number of supported languages varies between Android levels. The method isLanguageAvailable() can be used to check if a certain language is supported:
tts.isLanguageAvailable(Locale.CHINESE);
The speech pitch level can be set by using the setPitch() method. By default, the pitch value is 1.0. Use values less than 1.0 to decrease the pitch level or values greater than 1.0 to increase the pitch level:
tts.setPitch(0.6);
The speech rate can be set using setSpeechRate(). The default speech rate is 1.0. The speech rate can be doubled by setting it to 2.0 or made half by setting it to 0.5:
tts.setSpeechRate(2.0);
