how text to speech works in android

Question

I am creating an android application using text to speech capability I used the built in text to speech I only want to know how it has been developed and maintained in the android SDK, if any one knows a termed paper about developing text to speech in android i'll be blessed

Answer 1

This thread will help. Also, an abstract class for TTS Engine Implementation was introduced in API Level 14. Check this link. You can also read this information about speech synthesis to guide you on how it should be implemented.

Answer 2

by luck i was working in this also , take my code

package com.example.texttospeech;

import java.util.Locale;

import android.os.Bundle;
import android.app.Activity;
import android.speech.tts.TextToSpeech;
import android.speech.tts.TextToSpeech.OnInitListener;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends Activity implements OnClickListener, OnInitListener {

    private TextToSpeech tts;
    EditText editxt;
        Button b1;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);



        tts = new  TextToSpeech(this , this);
        editxt = (EditText) findViewById(R.id.editText1);
        b1 = (Button) findViewById(R.id.read);
        b1.setOnClickListener(this);
    }
    @Override
    public void onClick(View v) {
        switch (v.getId()) {
        case R.id.read:
            convert_text();
            break;

        default:
            break;
        }

    }
    private void convert_text() {
        String speech = editxt.getText().toString();
        tts.speak(speech, TextToSpeech.QUEUE_FLUSH, null);

    }
    @Override
    public void onInit(int status) {
        if(status == TextToSpeech.SUCCESS){
            int result = tts.setLanguage(Locale.getDefault());
            if(result == TextToSpeech.LANG_MISSING_DATA || result == TextToSpeech.LANG_NOT_SUPPORTED){  
                Log.e("DEBUG" , "Language Not Supported");}
            else{
                b1.setEnabled(true);
                convert_text();
            }

        }
        else{
            Log.i("DEBUG" , "MISSION FAILED");
        }

    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (tts != null){
            tts.stop();
            tts.shutdown();
        }
    }

}

mylayout activity_main.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" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:textSize="21sp"
        android:layout_marginTop="23dp"
        android:text="Text To Speech Test" />

    <EditText
        android:id="@+id/editText1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textView1"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="35dp"
        android:ems="10" />

    <Button
        android:id="@+id/read"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView1"
        android:layout_below="@+id/editText1"
        android:layout_marginLeft="46dp"
        android:layout_marginTop="50dp"
        android:text="Read" />

</RelativeLayout>