Download App from Market

package com.java2s.myapplication3.app;
/*  w  w w  .  j  a  v  a  2  s  .c o  m*/
import android.app.Activity;
import android.app.AlertDialog;
import android.content.ActivityNotFoundException;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.speech.RecognizerIntent;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;

public class MainActivity extends Activity {

    private static final int REQUEST_RECOGNIZE = 100;

    TextView tv;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        tv = new TextView(this);
        setContentView(tv);

        Intent intent = new Intent(
                RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
        intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
                RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
        intent.putExtra(RecognizerIntent.EXTRA_PROMPT,
                "Tell Me Your Name");
        try {
            startActivityForResult(intent, REQUEST_RECOGNIZE);
        } catch (ActivityNotFoundException e) {
            showDownloadDialog();
        }
    }

    private void showDownloadDialog() {
        AlertDialog.Builder builder = new AlertDialog.Builder(
                this);
        builder.setTitle("Not Available");
        builder.setMessage("No recognition application installed."
                + "  Would you like to download one?");
        builder.setPositiveButton("Yes",
                new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Intent marketIntent = new Intent(Intent.ACTION_VIEW);
                        marketIntent.setData(Uri.parse("market://details?id=com.google.android.voicesearch"));
                    }
                }
        );
        builder.setNegativeButton("No", null);
        builder.create().show();
    }

    @Override
    protected void onActivityResult(int requestCode,
                                    int resultCode, Intent data) {
        if (requestCode == REQUEST_RECOGNIZE && resultCode == Activity.RESULT_OK) {
            ArrayList<String> matches = data
                    .getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
            StringBuilder sb = new StringBuilder();
            for (String piece : matches) {
                sb.append(piece);
                sb.append('\n');
            }
            tv.setText(sb.toString());
        } else {
            Toast.makeText(this, "Operation Canceled",
                    Toast.LENGTH_SHORT).show();
        }
    }
}