Android Voice recognition

Create Layout

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.helloworld"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="14"
        android:targetSdkVersion="15" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
           >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>



create String values




<resources>

    <string name="app_name">MainActivity</string>
    <string name="btSpeak">Speak</string>
    <string name="menu_settings">Settings</string>
    <string name="title_activity_voice_recognition">Voice Recognition</string>
    <string name="tvTextMatches">Text Matches</string>
    <string name="sNoOfMatches">No of Matches</string>
    <string name="etSearchHint">Speech hint here</string>
    <string-array name="saNoOfMatches">
        <item>1</item>
        <item>2</item>
        <item>3</item>
        <item>4</item>
        <item>5</item>
        <item>6</item>
        <item>7</item>
        <item>8</item>
        <item>9</item>
        <item>10</item>
    </string-array>

</resources>



Create Activity



package com.example.helloworld;

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.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Spinner;
import android.widget.Toast;

public class MainActivity extends Activity {
    private static final int VOICE_RECOGNITION_REQUEST_CODE = 1001;

    private EditText metTextHint;
    private ListView mlvTextMatches;
    private Spinner msTextMatches;
    private Button mbtSpeak;

    @Override
    public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    metTextHint = (EditText) findViewById(R.id.etTextHint);
    mlvTextMatches = (ListView) findViewById(R.id.lvTextMatches);
    msTextMatches = (Spinner) findViewById(R.id.sNoOfMatches);
    mbtSpeak = (Button) findViewById(R.id.btSpeak);
    }

    public void checkVoiceRecognition() {
    // Check if voice recognition is present
    PackageManager pm = getPackageManager();
    List<ResolveInfo> activities = pm.queryIntentActivities(new Intent(
    RecognizerIntent.ACTION_RECOGNIZE_SPEECH), 0);
    if (activities.size() == 0) {
    mbtSpeak.setEnabled(false);
    Toast.makeText(this, "Voice recognizer not present",
    Toast.LENGTH_SHORT).show();
    }
    }

    public void speak(View view) {
    Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
    // Specify the calling package to identify your application
    intent.putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE, getClass()
    .getPackage().getName());

    // Display an hint to the user about what he should say.
    intent.putExtra(RecognizerIntent.EXTRA_PROMPT, metTextHint.getText()
    .toString());

    // Given an hint to the recognizer about what the user is going to say
    intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
    RecognizerIntent.LANGUAGE_MODEL_WEB_SEARCH);

    // If number of Matches is not selected then return show toast message
    if (msTextMatches.getSelectedItemPosition() == AdapterView.INVALID_POSITION) {
    Toast.makeText(this, "Please select No. of Matches from spinner",
    Toast.LENGTH_SHORT).show();
    return;
    }

    int noOfMatches = Integer.parseInt(msTextMatches.getSelectedItem()
    .toString());
    // Specify how many results you want to receive. The results will be
    // sorted where the first result is the one with higher confidence.

    intent.putExtra(RecognizerIntent.EXTRA_MAX_RESULTS, noOfMatches);

    startActivityForResult(intent, VOICE_RECOGNITION_REQUEST_CODE);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == VOICE_RECOGNITION_REQUEST_CODE)

    //If Voice recognition is successful then it returns RESULT_OK
    if(resultCode == RESULT_OK) {

    ArrayList<String> textMatchList = data
    .getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);

    if (!textMatchList.isEmpty()) {
    // If first Match contains the 'search' word
    // Then start web search.
    if (textMatchList.get(0).contains("search")) {

    String searchQuery = textMatchList.get(0).replace("search",
    " ");
    Intent search = new Intent(Intent.ACTION_WEB_SEARCH);
    search.putExtra(SearchManager.QUERY, searchQuery);
    startActivity(search);
    } else {
    // populate the Matches
    mlvTextMatches
    .setAdapter(new ArrayAdapter<String>(this,
    android.R.layout.simple_list_item_1,
    textMatchList));
    }

    }
    //Result code for various error.
    }else if(resultCode == RecognizerIntent.RESULT_AUDIO_ERROR){
    showToastMessage("Audio Error");
    }else if(resultCode == RecognizerIntent.RESULT_CLIENT_ERROR){
    showToastMessage("Client Error");
    }else if(resultCode == RecognizerIntent.RESULT_NETWORK_ERROR){
    showToastMessage("Network Error");
    }else if(resultCode == RecognizerIntent.RESULT_NO_MATCH){
    showToastMessage("No Match");
    }else if(resultCode == RecognizerIntent.RESULT_SERVER_ERROR){
    showToastMessage("Server Error");
    }
    super.onActivityResult(requestCode, resultCode, data);
    }
    void showToastMessage(String message){
    Toast.makeText(this, message, Toast.LENGTH_SHORT).show();
    }
    }




Note: if u want to run in emulates u can use internet permission in manifest file , in device not nessery