Andoid - ผมอยากจะคลิกตรงแผนที่ Google Maps แล้วเปิดแอป Google Maps ขึ้นมานะครับต้องทำไง

package com.example.last;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.StatusLine;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.BufferedHttpEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONException;
import org.json.JSONObject;

import com.example.last.DetailActivity_th;
import com.example.last.R;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;

import android.net.Uri;
import android.os.Bundle;
import android.os.StrictMode;
import android.annotation.SuppressLint;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.support.v4.app.FragmentActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

public class DetailActivity_th<img> extends FragmentActivity {

	private GoogleMap mGoogleMap;
	private SupportMapFragment mSupportMapFragment;

	@SuppressLint("NewApi")
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_detail_th);
		setTitle("Medicinal plants and herbs");

		// Permission StrictMode
		if (android.os.Build.VERSION.SDK_INT > 9) {
			StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
					.permitAll().build();
			StrictMode.setThreadPolicy(policy);
		}

		showInfo();
		// btnBack
		final Button btnBack = (Button) findViewById(R.id.btnBack);

		// Perform action on click
		btnBack.setOnClickListener(new View.OnClickListener() {
			public void onClick(View v) {
				Intent newActivity = new Intent(DetailActivity_th.this,
						Main_Th.class);
				startActivity(newActivity);
			}
		});

	}

	public void showInfo() {
		final TextView tMemberID = (TextView) findViewById(R.id.herb_name);
		final TextView tUsername = (TextView) findViewById(R.id.name_sci);
		final TextView tPassword = (TextView) findViewById(R.id.herb_gene);
		final TextView tName = (TextView) findViewById(R.id.herb_fix);
		final ImageView img = (ImageView) findViewById(R.id.imageView1);
		// final ImageView img2 = (ImageView) findViewById(R.id.imageView2);

		String ip = "10.60.7.62";
    	String urll = "http://"+ip+"/test/json/getByMemberID.php";

		Intent intent = getIntent();
		final String herb_id = intent.getStringExtra("herb_id");

		List<NameValuePair> params = new ArrayList<NameValuePair>();
		params.add(new BasicNameValuePair("txtKeyword", herb_id));

		String resultServer = getHttpPost(urll, params);

		String herb_name = "";
		String name_sci = "";
		String herb_gene = "";
		String herb_fix = "";
		String herb_pic = "";

		JSONObject c;
		try {
			c = new JSONObject(resultServer);
			herb_name = c.getString("herb_name");
			name_sci = c.getString("name_sci");
			herb_gene = c.getString("herb_gene");
			herb_fix = c.getString("herb_fix");
			herb_pic = c.getString("herb_pic");
			

			final String herb_vdox = c.getString("herb_vdo");
			final double herb_lat = c.getDouble("herb_lat");
			final double herb_long = c.getDouble("herb_long");
			final String latlong_detail = c.getString("latlong_detail");
			final String detail_1 = c.getString("detail_1");

			
			
			final ImageView vdoim = (ImageView) findViewById(R.id.imageView2);
			vdoim.setOnClickListener(new View.OnClickListener() {
				public void onClick(View v) {
					Intent i = new Intent(Intent.ACTION_VIEW);
					i.putExtra("force_fullscreen", true);
					i.setData(Uri.parse("" + herb_vdox + ""));
					startActivity(i);
				}
			});
			
			if(herb_vdox.equals("")){
				vdoim.setImageResource(R.drawable.no);
				vdoim.setEnabled(false);
			}
			// if(!herb_name.equals(""))
			// {
			tMemberID.setText(herb_name);
			tUsername.setText(name_sci);
			tPassword.setText(herb_gene);
			tName.setText(herb_fix);
			// }
			// else
			// {
			// tMemberID.setText("-");
			// tUsername.setText("-");
			// tPassword.setText("-");
			// tName.setText("-");
			// tEmail.setText("-");
			// tTel.setText("-");
			// }
			
			

			// view/fragment matching
			mSupportMapFragment = (SupportMapFragment) getSupportFragmentManager()
					.findFragmentById(R.id.main_Support_map_fragment);
			mGoogleMap = mSupportMapFragment.getMap();

			// Set Google Map Location
			mGoogleMap.setMyLocationEnabled(true);
			mGoogleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);

			// register event for google map
			mGoogleMap
					.setOnInfoWindowClickListener(new GoogleMap.OnInfoWindowClickListener() {

						@Override
						public void onInfoWindowClick(Marker marker) {
							Toast.makeText(DetailActivity_th.this,
									marker.getTitle(), Toast.LENGTH_SHORT)
									.show();
							// TODO Auto-generated method stub

						}
					});

			// animate Google Map's camera
			mGoogleMap.animateCamera(CameraUpdateFactory.newLatLngZoom(
					new LatLng(herb_lat,
							herb_long), 15));

			addMarkerToGoogleMap(detail_1,latlong_detail, herb_lat,
					herb_long);

		} catch (JSONException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();

		}

		// ------------------------------------------------------

		try {
			URL url = new URL("http://" + ip + "/test/myfile/" + herb_pic);
			// try this url =
			// "http://0.tqn.com/d/webclipart/1/0/5/l/4/floral-icon-5.jpg"
			HttpGet httpRequest = null;

			httpRequest = new HttpGet(url.toURI());

			HttpClient httpclient = new DefaultHttpClient();
			HttpResponse response = (HttpResponse) httpclient
					.execute(httpRequest);

			HttpEntity entity = response.getEntity();
			BufferedHttpEntity b_entity = new BufferedHttpEntity(entity);
			InputStream input = b_entity.getContent();

			Bitmap bitmap = BitmapFactory.decodeStream(input);

			img.setImageBitmap(bitmap);

		} catch (Exception ex) {

		}
	}

	public String getHttpPost(String url, List<NameValuePair> params) {
		StringBuilder str = new StringBuilder();
		HttpClient client = new DefaultHttpClient();
		HttpPost httpPost = new HttpPost(url);

		try {
			httpPost.setEntity(new UrlEncodedFormEntity(params));
			HttpResponse response = client.execute(httpPost);
			StatusLine statusLine = response.getStatusLine();
			int statusCode = statusLine.getStatusCode();
			if (statusCode == 200) { // Status OK
				HttpEntity entity = response.getEntity();
				InputStream content = entity.getContent();
				BufferedReader reader = new BufferedReader(
						new InputStreamReader(content));
				String line;
				while ((line = reader.readLine()) != null) {
					str.append(line);
				}
			} else {
				Log.e("Log", "Failed to download result..");
			}
		} catch (ClientProtocolException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return str.toString();
	}

	private void addMarkerToGoogleMap(String title, String snippet, double lat,
			double lng) {
		if (null != mGoogleMap) {
			MarkerOptions options = new MarkerOptions();
			options.title(title);
			options.snippet(snippet);
			options.position(new LatLng(lat, lng));
			options.icon(BitmapDescriptorFactory
					.defaultMarker(BitmapDescriptorFactory.HUE_GREEN));

			// add marker
			mGoogleMap.addMarker(options);

		}
	}

}