8 June 2015

Make your own Speech Recognition without Google popup

What we will do ?
-> We will prepare Speech Recognition application for Android API 17 and above without calling the default Google Speech Recognizer.

What we will need ?
  • Eclipse with ADT
  • Android Smartphone with Android version 4.0 OR above.
Step 1 : Create a New Application. Go to File->New->Android Application Project.
File New Android Application Project

Step 2 : Give a Name to your Application as SpeechRecogDemo and package name as com.mia.speechrecogdemo
Name to your Application as SpeechRecogDemo and package name as com.mia.speechrecogdemo
Click Next continuously and at last click Finish.
Click Next continuously and at last click Finish.

Step 3 : Open strings.xml from res->values
strings.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="app_name">SpeechRecogdemo</string>
    <string name="hello_world">Welcome</string>
    <string name="menu_settings">Settings</string>
</resources>

Step 4 : Open activity_main.xml from res->layout.
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" >
    <TextView
        android:id="@+id/responseText"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:text="@string/hello_world"
        android:textSize="35dp" />
</RelativeLayout>

Step 5 : Download package org.apache.commons.lang3 from here. Unzip the zip file and check in the folder for file commons-lang3-3.4.jar

Step 6 : Right-click on SpeechRecogDemo from Project Explorer and select Build Path->Configure Build Path.
Right-click on SpeechRecogDemo from Project Explorer and select Build Path->Configure Build Path

Step 7 :  Click on Add External JARs.
Click on Add External JARs.
Browse to location where you have downloaded org.apache.commons.lang3 and select commons-lang3-3.4.jar.
Browse to location where you have downloaded org.apache.commons.lang3 and select commons-lang3-3.4.jar.
Add it and press OK.
press OK.

Step 8 : Open MainActivity.java from src->com.mia.speechrecogdemo.
MainActivity.java
package com.mia.speechrecogdemo;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;

import org.apache.commons.lang3.StringUtils;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.PowerManager;
import android.speech.RecognitionListener;
import android.speech.RecognizerIntent;
import android.speech.SpeechRecognizer;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.TextView;

@SuppressLint("SimpleDateFormat")
public class MainActivity extends Activity {

 private static final String TAG = MainActivity.class.getName();

 //wakelock to keep screen on
 protected PowerManager.WakeLock mWakeLock;

 //speach recognizer for callbacks
 private SpeechRecognizer mSpeechRecognizer;

 //handler to post changes to progress bar
 private Handler mHandler = new Handler();

 //ui textview
 TextView responseText;

 //intent for speech recogniztion
 Intent mSpeechIntent;
 
 //this bool will record that it's time to kill P.A.L.
 boolean killCommanded = false;

 //legel commands
 private static final String[] VALID_COMMANDS = {
  "Best Website for Android",
  "what day is it",
  "who are you",
  "exit"
 };
 private static final int VALID_COMMANDS_SIZE = VALID_COMMANDS.length;


 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  responseText = (TextView) findViewById(R.id.responseText);
 }

 @Override
 protected void onStart() {
  mSpeechRecognizer = SpeechRecognizer.createSpeechRecognizer(MainActivity.this);
  SpeechListener mRecognitionListener = new SpeechListener();
  mSpeechRecognizer.setRecognitionListener(mRecognitionListener);
  mSpeechIntent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);

  mSpeechIntent.putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE,"com.androiddev101.ep8");

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

  // Specify how many results you want to receive. The results will be sorted
  // where the first result is the one with higher confidence.
  mSpeechIntent.putExtra(RecognizerIntent.EXTRA_MAX_RESULTS, 20);


  mSpeechIntent.putExtra(RecognizerIntent.EXTRA_PARTIAL_RESULTS, true);

  //aqcuire the wakelock to keep the screen on until user exits/closes app
  final PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
  this.mWakeLock = pm.newWakeLock(PowerManager.SCREEN_DIM_WAKE_LOCK, TAG);
  this.mWakeLock.acquire();
  mSpeechRecognizer.startListening(mSpeechIntent);
  super.onStart();
 }
 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  return false;
 }
 private String getResponse(int command){
  Calendar c = Calendar.getInstance();

  String retString =  "I'm sorry, Not Possible for me";
  SimpleDateFormat dfDate_day;
  switch (command) {
  case 0:
   retString = "MADEINANDROID.NET";
     responseText.setOnClickListener(new View.OnClickListener() {                   
                     @Override
                     public void onClick(View arg0) {
                         // TODO Auto-generated method stub
                         Intent i = new Intent(android.content.Intent.ACTION_VIEW, Uri.parse("http://madeinandroid.net/"));
                         startActivity(i);           
                     }
                 });
   break;
  case 1:
   dfDate_day = new SimpleDateFormat("dd/MM/yyyy");
   retString= " Today is " + dfDate_day.format(c.getTime());
   break;
  case 2:
   retString = "Answering Machine";
   break;

  case 3:
   killCommanded = true;
   break;

  default:
   break;
  }
  return retString;
 }

 @Override
 protected void onPause() {
  //kill the voice recognizer
  if(mSpeechRecognizer != null){
   mSpeechRecognizer.destroy();
   mSpeechRecognizer = null;

  }
  this.mWakeLock.release();
  super.onPause();
 }

 private void processCommand(ArrayList<String> matchStrings){
  String response = "I'm sorry, Dave. I'm afraid I can't do that.";
  int maxStrings = matchStrings.size();
  boolean resultFound = false;
  for(int i =0; i < VALID_COMMANDS_SIZE && !resultFound;i++){
   for(int j=0; j < maxStrings && !resultFound; j++){
    if(StringUtils.getLevenshteinDistance(matchStrings.get(j), VALID_COMMANDS[i]) (VALID_COMMANDS[i].length() / 3) ){
     response = getResponse(i);
    }
   }
  }
  
  final String finalResponse = response;
  mHandler.post(new Runnable() {
   public void run() {
    responseText.setText(finalResponse);
   }
  });

 }
 class SpeechListener implements RecognitionListener {
  public void onBufferReceived(byte[] buffer) {
   Log.d(TAG, "buffer recieved ");
  }
  public void onError(int error) {
   //if critical error then exit
   if(error == SpeechRecognizer.ERROR_CLIENT || error == SpeechRecognizer.ERROR_INSUFFICIENT_PERMISSIONS){
    Log.d(TAG, "client error");
   }
   //else ask to repeats
   else{
    Log.d(TAG, "other error");
    mSpeechRecognizer.startListening(mSpeechIntent);
   }
  }
  public void onEvent(int eventType, Bundle params) {
   Log.d(TAG, "onEvent");
  }
  public void onPartialResults(Bundle partialResults) {
   Log.d(TAG, "partial results");
  }
  public void onReadyForSpeech(Bundle params) {
   Log.d(TAG, "on ready for speech");
  }
  public void onResults(Bundle results) {
   Log.d(TAG, "on results");
   ArrayList<String> matches = null;
   if(results != null){
    matches = results.getStringArrayList(SpeechRecognizer.RESULTS_RECOGNITION);
    if(matches != null){
     Log.d(TAG, "results are " + matches.toString());
     final ArrayList<String> matchesStrings = matches;
     processCommand(matchesStrings);
     if(!killCommanded)
      mSpeechRecognizer.startListening(mSpeechIntent);
     else
      finish();

    }
   }

  }
  public void onRmsChanged(float rmsdB) {
   //   Log.d(TAG, "rms changed");
  }
  public void onBeginningOfSpeech() {
   Log.d(TAG, "speach begining");
  }
  public void onEndOfSpeech() {
   Log.d(TAG, "speach done");
  }

 };

}

Step 9 : Run the application in your Android Phone.Watch the video below to see the output.
Github download
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