Main.java

package com.androidcookbook.speechrecognizerdemo;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.speech.RecognizerIntent;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import java.util.List;

public class Main extends Activity {
    private static final int RECOGNIZER_RESULT = 1234;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button startSpeech = (Button)findViewById(R.id.getSpeechButton);
        startSpeech.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
                intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
                        RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
                intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Speech to text");
                startActivityForResult(intent, RECOGNIZER_RESULT);
            }
        });
    }

    /**
     * Handle the results from the recognition activity.
     */
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == RECOGNIZER_RESULT && resultCode == RESULT_OK) {
            List<String> matches = data.getStringArrayListExtra(
                    RecognizerIntent.EXTRA_RESULTS);
            TextView speechText = (TextView)findViewById(R.id.speechText);
            speechText.setText(matches.get(0).toString());
        }
        super.onActivityResult(requestCode, resultCode, data);
    }
}