Current Location send via SMS Time scheduler in background Service Android

package com.umer.gpssms;

import java.util.Timer;
import java.util.TimerTask;

import android.app.Service;
import android.content.Intent;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.telephony.SmsManager;
import android.util.Log;
import android.widget.Toast;

public class SmssendService extends Service implements LocationListener {
public double latitude = 00.00;
public double longitude = 00.00;

LocationManager locationManager;
private static final String TAG = "MyService";
public Timer timer;

@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
Toast.makeText(this, "My Service Created", Toast.LENGTH_LONG).show();
Log.d(TAG, "onCreate");
timer = new Timer();
onGPS();

try {
locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);

locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER, 10 * 1000, (float) 10.0,
this);
locationManager
.requestLocationUpdates(LocationManager.GPS_PROVIDER,
90 * 1000, (float) 10.0, this);
Criteria criteria = new Criteria();
criteria.setPowerRequirement(Criteria.POWER_HIGH);
criteria.setAccuracy(Criteria.ACCURACY_FINE);
Location lastknownlocationGps = locationManager
.getLastKnownLocation("gps");

Location lastknownlocationNetwork = locationManager
.getLastKnownLocation("network");

if (lastknownlocationGps != null) {
latitude = lastknownlocationGps.getLatitude();
longitude = lastknownlocationGps.getLongitude();
Toast.makeText(this,
"GPS : lat: " + latitude + " long: " + longitude, 4000)
.show();
} else if (lastknownlocationNetwork != null) {
latitude = lastknownlocationNetwork.getLatitude();
longitude = lastknownlocationNetwork.getLongitude();
Toast.makeText(this,
"Network: lat: " + latitude + " long: " + longitude,
4000).show();
}
} catch (Exception e) {

}
}

@Override
public void onDestroy() {
Toast.makeText(this, "My Service Stopped", Toast.LENGTH_LONG).show();
Log.d(TAG, "onDestroy");
timer.cancel();
try {
Intent intent = new Intent("android.location.GPS_ENABLED_CHANGE");
intent.putExtra("enabled", false);
sendBroadcast(intent);
} catch (Exception e) {

}
}

@Override
public void onStart(Intent intent, int startid) {
Toast.makeText(this, "My Service Started", Toast.LENGTH_LONG).show();
timer = new Timer();
timer.scheduleAtFixedRate(new TimerTask() {

public void run() {

// Do whatever you want to do every “INTERVAL”
sendSms();

}

}, 0, 20000);

Log.d(TAG, "onStart");

}

@Override
public void onLocationChanged(Location arg0) {
// TODO Auto-generated method stub

latitude = arg0.getLatitude();
longitude = arg0.getLongitude();

}

@Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}

@Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}

@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}

public void sendSms() {
SmsManager sm = SmsManager.getDefault();
sm.sendTextMessage(" ur number like 03336851469", null, "Current Location: lat:"
+ latitude + "  lng:: " + longitude, null, null);
}

private void onGPS() {
locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
// ** check GPS status.
boolean isGPS = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
// ** checkListner method is start background thread which count time
if (!isGPS) {
try {
Intent intent = new Intent("android.location.GPS_ENABLED_CHANGE");
intent.putExtra("enabled", true);
sendBroadcast(intent);
} catch (Exception e) {

}
} else {
}
}
}