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Speech to Text using Android APIs

You can create a simple application using the google speech engine and convert the voice to text.

Create an android project and create the following res layout

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_above="@+id/textView1"
    android:layout_toLeftOf="@+id/textView1"
    android:gravity="center"
    android:orientation="vertical" >
 
    <ImageButton
        android:id="@+id/btnSpeak"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:layout_marginRight="10dp"
        android:layout_marginTop="10dp"
         />
 
    <TextView
        android:id="@+id/txtText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:layout_marginTop="10dp"
        android:textAppearance="?android:attr/textAppearanceLarge" />
 
</LinearLayout>

Now you can use the following activity code to add in your sample application.

package com.example.speech2text;

import java.util.ArrayList;
 
import android.app.Activity;
import android.content.ActivityNotFoundException;
import android.content.Intent;
import android.os.Bundle;
import android.speech.RecognizerIntent;
import android.view.Menu;
import android.view.View;
import android.widget.ImageButton;
import android.widget.TextView;
import android.widget.Toast;
 
public class MainActivity extends Activity {
 
    protected static final int RESULT_SPEECH = 1;
 
    private ImageButton btnSpeak;
    private TextView txtText;
 
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        txtText = (TextView) findViewById(R.id.txtText);
 
        btnSpeak = (ImageButton) findViewById(R.id.btnSpeak);
 
        btnSpeak.setOnClickListener(new View.OnClickListener() {
 
            @Override
            public void onClick(View v) {
 
                Intent intent = new Intent(
                        RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
 
                intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, "en-US");
 
                try {
                    startActivityForResult(intent, RESULT_SPEECH);
                    txtText.setText("");
                } catch (ActivityNotFoundException a) {
                    Toast t = Toast.makeText(getApplicationContext(),
                            "Opps! Your device doesn't support Speech to Text",
                            Toast.LENGTH_SHORT);
                    t.show();
                }
            }
        });
 
    }
 
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
 
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
 
        switch (requestCode) {
        case RESULT_SPEECH: {
            if (resultCode == RESULT_OK && null != data) {
 
                ArrayList<String> text = data
                        .getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
 
                txtText.setText(text.get(0));
            }
            break;
        }
 
        }
    }
}