Android - GPS + Location Manager (อยากทราบ การหา เวลา m/s ที่ GPS อ่านได้ กับ องค์ศาที่เปลี่ยนแปลงไป)

import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.provider.Settings;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.widget.TextView;
import android.widget.Toast;

public class Main extends Activity {
	LocationManager lm;
	TextView textLatitude, textLongitude, text_Kg_h;
	Double temp;
	
		public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		textLatitude = (TextView) findViewById(R.id.textLatitude);
		textLongitude = (TextView) findViewById(R.id.textLongitude);
		text_Kg_h = (TextView) findViewById(R.id.text_kg_h);
		lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

		Criteria criteria = new Criteria();
		criteria.setAccuracy(Criteria.ACCURACY_FINE);
		criteria.setAltitudeRequired(false);
		criteria.setBearingRequired(false);
	}

	public void onResume() {
		super.onResume();
		setup();
	}

	public void onStart() {
		super.onStart();
		boolean gpsEnabled, networkEnabled;
		gpsEnabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);

		if (!gpsEnabled) {
			networkEnabled = lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
			if (!networkEnabled) {
				Intent intent = new Intent(
						Settings.ACTION_LOCATION_SOURCE_SETTINGS);
				startActivity(intent);
			}
		}
	}

	public void onStop() {
		super.onStop();
		lm.removeUpdates(listener);
	}

	public void setup() {
		
		lm.removeUpdates(listener);
		String latitude = "ยังไม่ได้รับค่า latitude";
		String longitude = "ยังไม่ได้รับค่า longitude";

		Location networkLocation = requestUpdatesFromProvider(
				LocationManager.NETWORK_PROVIDER, "ไม่สามารถเชื่อมต่อ Network ได้");
		if (networkLocation != null) {
			latitude = String.format("%.7f", networkLocation.getLatitude());
			longitude = String.format("%.7f", networkLocation.getLongitude());
		}

		Location gpsLocation = requestUpdatesFromProvider(
				LocationManager.GPS_PROVIDER, "GPS ยังไม่ถูกเปิดใช้งาน นะค่ะ");

		if (gpsLocation != null) {
			latitude = String.format("%.7f", gpsLocation.getLatitude());
			longitude = String.format("%.7f", gpsLocation.getLongitude());
			
		}

		textLatitude.setText(latitude);
		textLongitude.setText(longitude + "\n" + temp );
		}

	public Location requestUpdatesFromProvider(final String provider,
			String error) {
		Location location = null;
		if (lm.isProviderEnabled(provider)) {
			lm.requestLocationUpdates(provider, 1000, 10, listener);
			location = lm.getLastKnownLocation(provider);
		} else {
			Toast.makeText(this, error, Toast.LENGTH_LONG).show();
		}
		return location;
	}

	public final LocationListener listener = new LocationListener() {
		public void onLocationChanged(Location location) {
			textLatitude.setText(String.format("%.7f", location.getLatitude()));
			textLongitude.setText(String.format("%.7f", location.getLongitude()));
                        // 
			temp = location.getSpeed() ; // อ่านค่า m/s เก็บไว้ใน temp ผมเข้าใจถูกหรือเปล่าครับ
                        //						
		}