Voice Recognition(Speech to text) in Android

Hello Guys, Hope You all are doing well. Today  I am going to show an example on Voice recognition in Android. My Previous Post was on Text To speech . Now I am going to show  Speech to text and search it on Google.

Android natively provides feature of Speech to Text.Voice recognition featured in android is achieved using the RecognizerIntent.Use the Recognizer class in an intent to call the voice API.Internally voice recognition communicates with the server and gets the results. So you must provide the internet access permission for the application. Android Jelly Bean(API level 16) doesn’t  require internet connection to perform voice recognition.

Here we check for the recognizer in the device if available the speech to text happen else we show a toast displaying 'Recognizer Not Found'

Note: This application will not work in emulator since it does not have the recognizer, so test it in a device and it also requires an internet connection.

   

                 

Above given image is final  output of voice recognition working sample app. Just create a Android project named it VoiceRecognition in your Eclipse. Copy and paste following source code in your class. 

Java Class

1. VoiceActivity.java

Xml file

1. activity_voice.xml

Now put following code in your 

Voice Activity. java. 

package com.sks.texttospeech;

import java.util.ArrayList;

import java.util.List;

import android.app.Activity;

import android.app.SearchManager;

import android.content.Intent;

import android.content.pm.PackageManager;

import android.content.pm.ResolveInfo;

import android.os.Bundle;

import android.speech.RecognizerIntent;

import android.view.View;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemClickListener;

import android.widget.ArrayAdapter;

import android.widget.Button;

import android.widget.ListView;

import android.widget.Toast;

public class VoiceActivity extends Activity{

private static final int REQUEST_CODE = 1234;

private ListView matchList;

Button speak_button;

@Override

protected void onCreate(Bundle savedInstanceState) {

// TODO Auto-generated method stub

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_voice_recignition);

speak_button = (Button) findViewById(R.id.speakButton);

matchList = (ListView) findViewById(R.id.list);

// Disable button if no recognition service is present

PackageManager pm = getPackageManager();

List<ResolveInfo> activities = pm.queryIntentActivities(

new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH), 0);

if (activities.size() == 0)

{

speak_button.setEnabled(false);

Toast.makeText(getApplicationContext(), "Recognizer Not Found", 1000).show();

}

speak_button.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

startVoiceRecognitionActivity();

}

});

matchList.setOnItemClickListener(new OnItemClickListener() {

@Override

public void onItemClick(AdapterView<?> parent, View view, int position,long id) {

String item = matchList.getAdapter().getItem(position).toString();

Toast.makeText(VoiceActivity.this, item + " selected", Toast.LENGTH_LONG).show();

Intent search = new Intent(Intent.ACTION_WEB_SEARCH);

search.putExtra(SearchManager.QUERY, item);

startActivity(search);

}

});

}

private void startVoiceRecognitionActivity()

{

Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);

//1.LANGUAGE_MODEL_WEB_SEARCH : For short phrases

//2.LANGUAGE_MODEL_FREE_FORM : If not sure about the words or phrases and its domain.

intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);

intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "saurabhsharma Voice Recognition...");

startActivityForResult(intent, REQUEST_CODE);

}

@Override

protected void onActivityResult(int requestCode, int resultCode, Intent data)

{

if (requestCode == REQUEST_CODE && resultCode == RESULT_OK)

{

ArrayList<String> matches = data.getStringArrayListExtra(

RecognizerIntent.EXTRA_RESULTS);

matchList.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,matches));

}

super.onActivityResult(requestCode, resultCode, data);

}

}

Now Put following code in your 

activity_voice.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:orientation="vertical" >

<TextView

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:layout_margin="10dp"

android:gravity="center_horizontal"

android:textStyle="bold"

android:textColor="#A52A2A"

android:text="Click microPhone and start speaking" />

<Button

android:id="@+id/speakButton"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_gravity="center_horizontal"

android:background="@drawable/voic_img1" />

<ListView

android:id="@+id/list"

android:layout_width="fill_parent"

android:layout_height="0dip"

android:layout_weight="1" />

</LinearLayout>

Finally put internet permission in your manifest file.

<uses-permission android:name="android.permission.INTERNET" />

  Run this code on Actual Device and  Enjoy the Speech Api Of android.

                                       Happy Coding !!!