Create Voice Search Android Application Using Android Studio

Introduction

Android is one of the most popular operating systems for mobile. In this article, I will show you how to create Voice Search android application using android studio

Requirements

• Android Studio version 2.3.3
• Little bit XML and JAVA knowledge.
• Android Emulator (or) Android mobile
• Download link (Android Studio)

Steps should be followed

These steps create a Voice Search Android application using Android studio and I have included the source code below.

Step 1

Open Android Studio and Start a New Android Studio Project.

 

Step 2

You can choose your application name and choose where your project is stored on the location. If you wish to use C++ for coding the project, mark the "Include C++ support", and click "Next" button.



Now, select the version of Android and select the target Android devices.

Step 3

Now, add the activity and click "Next" button.



Add Activity name and click "Finish".

Step 4

Go to activity_main.xml, This XML file contains the designing code for an Android app in the activity_main.xml;



 The XML code given below.

<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 " />

    <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 here!" />

</LinearLayout>

Step 5

Go to  Main Activity.java, This Java program is the backend language for an Android.



The java code is given below

 package abu.myapplication;
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);
    }

}

Step 6

Now, go to menu bar and click make project or press ctrl+f9. To debug the error.

Step 7

Then click Run button or press shift+f10 To run the project. And choose the virtual machine and click OK.



Conclusion

We have successfully created a Voice Search Android application using Android studio.