Text to Speech on Android

Android provides a useful feature that converts text to speech (TTS) and reproduces text in different languages. This guide explains how to create this function. In this lesson I will also explain how to change the type of language, volume and speed level.

Sources

Below I presented a video of the final result.
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I developed a simple interface with a single input field and a button to trigger an event that will accept text from the input field and reproduce this text.



1. Create a new project by selecting File ⇒ New Android Project and fill in the required data.
2. Implement your main activity class from TextToSpeech.OnInitListener

public class AndroidTextToSpeechActivity extends Activity implements TextToSpeech.OnInitListener { 

3. Now add the following code to the main class.

 package com.androidhive.texttospeech; import java.util.Locale; 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; public class AndroidTextToSpeechActivity extends Activity implements TextToSpeech.OnInitListener { /** Called when the activity is first created. */ private TextToSpeech tts; private Button btnSpeak; private EditText txtText; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); tts = new TextToSpeech(this, this); btnSpeak = (Button) findViewById(R.id.btnSpeak); txtText = (EditText) findViewById(R.id.txtText); // button on click event btnSpeak.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View arg0) { 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 = txtText.getText().toString(); tts.speak(text, TextToSpeech.QUEUE_FLUSH, null); } } 

4. And run the project.

Language change

You can change the language using the SetLanguage () function. Currently many languages ​​are supported.

 tts.setLanguage(Locale.CHINESE); // Chinese language 

Volume change

You can change the volume level using the setPitch () function. The default value is 1.0.

 tts.setPitch(0.6); 

Speed ​​change

The playback frequency can be set using the setSpeechRate () function. The default value is 1.0.

 tts.setSpeechRate(2);