Use Voice Search in Android Studio

In this blog we will see How to use voice search in android programming.

Let us see the steps on how to perform this task in android .Create new project with a valid name, once everything ready our projects looks like below screen.



App->res->layout->activity_main.xml

<LinearLayout
    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:orientation="vertical" >
    <TextView android:id="@+id/textView1" android:layout_width="fill_parent" android:layout_height="wrap_content" android:paddingBottom="4dip" android:text="Click the button and start speaking" />
    <EditText android:id="@+id/editText1" android:layout_width="match_parent" android:layout_height="wrap_content" android:ems="10" >
        <requestFocus/>
    </EditText>
    <Button android:id="@+id/speakButton" android:layout_width="fill_parent" android:onClick="speakButtonClicked" android:layout_height="wrap_content" android:text="Click Me!" />
</LinearLayout>

app->java->com.example.pavithra.voicesearch->MainActivity.java

package com.example.pavithra.voicesearch;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.speech.RecognizerIntent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
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.TextView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity
{
    EditText ed;
    TextView tv;
    private static final int REQUEST_CODE = 1234;
    Button speak;@
    Override
    protected void onCreate(Bundle savedInstanceState)
        {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            final Button speak = (Button) findViewById(R.id.speakButton);
            ed = (EditText) this.findViewById(R.id.editText1);
            tv = (TextView) this.findViewById(R.id.textView1);
            // 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.setEnabled(false);
                speak.setText("Recognizer not present");
            }
            ed.addTextChangedListener(new TextWatcher()
            {@
                Override
                public void beforeTextChanged(CharSequence s, int start, int count, int after)
                {
                    // TODO Auto-generated method stub
                }@
                Override
                public void onTextChanged(CharSequence s, int start, int before, int count)
                {
                    // TODO Auto-generated method stub
                }@
                Override
                public void afterTextChanged(Editable s)
                {
                    // TODO Auto-generated method stub
                    speak.setEnabled(false);
                }
            });
        }
        /**
         * Handle the action of the button being clicked
         */
    public void speakButtonClicked(View v)
        {
            startVoiceRecognitionActivity();
        }
        /**
         * Fire an intent to start the voice recognition activity.
         */
    private void startVoiceRecognitionActivity()
        {
            Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
            intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
            intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Voice searching...");
            startActivityForResult(intent, REQUEST_CODE);
        }
        /**
         * Handle the results from the voice recognition activity.
         */
        @
    Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data)
    {
        if (requestCode == REQUEST_CODE && resultCode == RESULT_OK)
        {
            // Populate the wordsList with the String values the recognition engine thought it heard
            final ArrayList < String > matches = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
            if (!matches.isEmpty())
            {
                String Query = matches.get(0);
                ed.setText(Query);
                speak.setEnabled(false);
            }
        }
        super.onActivityResult(requestCode, resultCode, data);
    }
}

Now Run the Application by pressing Shift+F10 and see the output as show like below