Implementing Android Text to Speech Example


Lets see how to implement Text to Speech (tts) in Android Application using TextToSpeech class from package android.speech.tts that was added in API level 21.

Android Text to Speech
Android Text to Speech

We will create an EditText and Button when the button is clicked text entered in the EditText is spoken out. You need to implement TextToSpeech.OnInitListener for the Activity that wants to added TTS, and implement the onInit() abstract method,

File : MainActivity.java
package com.code2care.tools.texttospeach;

import android.os.Bundle;
import android.speech.tts.TextToSpeech;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.widget.EditText;

import java.util.Locale;


public class MainActivity extends ActionBarActivity  implements TextToSpeech.OnInitListener{

    private TextToSpeech engine;
    private EditText text;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        text = (EditText) findViewById(R.id.text);
        engine = new TextToSpeech(this, this);
    }



    public void speakText(View v) {

        String textContents = text.getText().toString();
        //speak() would work on if you have set minSDK version 21 or higher
        engine.speak(textContents, TextToSpeech.QUEUE_FLUSH, null, null);

    }

    @Override
    public void onInit(int i) {


        if (i == TextToSpeech.SUCCESS) {
            //Setting speech Language
            engine.setLanguage(Locale.CANADA);
            engine.setPitch(1);
        }
    }

}
File : layout.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity">


    <EditText

        android:id="@+id/text"
        android:layout_width="match_parent"
        android:layout_height="120dp"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="46dp"
        android:ems="10"
        android:hint="Enter text to be converted to Speech"
        android:inputType="textMultiLine" />

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="speakText"
        android:text="Speak"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true" />
</RelativeLayout>

Note this will only work with Android API versions 21 or higher!