Android Speech Recognition – Example

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Android Speech Recognition Example


Speech Recognition is used to convert users voice totext. In this tutorial we are going to implement GoogleSpeech Recognition in our Android Application whichwill convert users voice to text and it will display it inTextView.

Creating Project

Make sure you have properly setup the Android SDK,AVD for Testing the Application. Its better to have aphysical device for testing. Create a New project inEclipse IDE with the package as

com.learn2crack.speech. Create the Main Activity as MainActivity and the main Layout asactivity_main.


Speech Recognition SpeechRecognition.zipVersion: 1.0

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Creating Layout

The main layout of our project activity_main contains a Button to Start Google Speech Recognitionand a TextView to display the converted voice.

activity_main.xml


We have another layout dialog_matches_frag which shows a list of matching voice to text convertionsfrom the input.

dialog_matches_frag.xml

Creating Activity

In our MainActivity import the layout items. The fuction isConnected() is used to check whether thedevice has a active Internet connection, Since voice recognition will only work with working Internetconnection. If it has a working Internet connection the Speech Recognizer Intent will be opened and itwill be listening for voice. When it successfully recognises the voice it responses with RESULT_OK. Thewe are opening a new Dialog to show the matched text in listview. When user selects a item from thelist it is displayed in TextView. The dialog is initialised by new Dialog(MainActivity.this).


MainActivity.javapackage com.learn2crack.speech;import java.util.ArrayList;import android.net.ConnectivityManager;import android.net.NetworkInfo;import android.os.Bundle;import android.app.Activity;import android.app.Dialog;import android.content.Context;import android.content.Intent;import android.speech.RecognizerIntent;import android.view.View;import android.view.View.OnClickListener;import android.widget.AdapterView;import android.widget.ArrayAdapter;import android.widget.Button;import android.widget.ListView;import android.widget.TextView;import android.widget.Toast;public class MainActivity extends Activity {private static final int REQUEST_CODE = 1234;Button Start;TextView Speech;Dialog match_text_dialog;ListView textlist;ArrayList matches_text; @Override protected void onCreate(Bundle savedInstanceState) {


protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Start = (Button)findViewById(R.id.start_reg); Speech = (TextView)findViewById(R.id.speech); Start.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { if(isConnected()){ Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH); intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM); startActivityForResult(intent, REQUEST_CODE); } else{ Toast.makeText(getApplicationContext(), "Plese Connect to Internet", Toast.LENGTH_LONG).show(); }} });} public boolean isConnected() { ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo net = cm.getActiveNetworkInfo(); if (net!=null && net.isAvailable() && net.isConnected()) { return true; } else { return false; } } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (requestCode == REQUEST_CODE && resultCode == RESULT_OK) { match_text_dialog = new Dialog(MainActivity.this); match_text_dialog.setContentView(R.layout.dialog_matches_frag); match_text_dialog.setTitle("Select Matching Text"); textlist = (ListView)match_text_dialog.findViewById(R.id.list); matches_text = data .getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);


Creating Manifest

We need the permission to access Internet and Network State.

android.permission.INTERNETandroid.permission.ACCESS_NETWORK_STATE

AndroidManifest.xml

.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS); ArrayAdapter adapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, matches_text); textlist.setAdapter(adapter); textlist.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView parent, View view, int position, long id) { Speech.setText("You have said " +matches_text.get(position)); match_text_dialog.hide(); } }); match_text_dialog.show(); } super.onActivityResult(requestCode, resultCode, data); }}


Finally run the project in emulator or in a physical device.

Screenshots

android:versionName="1.0" >

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Raj Amal is a Co-founder of Learn2crack.com. He is a Android Developer and Blogger.

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Android Speech Recognition – Example