Android Google Map : Check Enabled Location Services

package com.myapp;

import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.location.LocationManager;
import android.os.Bundle;
import android.provider.Settings;
import android.support.v4.app.FragmentActivity;

public class MainActivity extends FragmentActivity {

	// Google Map
	private GoogleMap googleMap;

	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		googleMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.googleMap)).getMap();

		final AlertDialog.Builder adb = new AlertDialog.Builder(this);

		LocationManager lm = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
		boolean isGPS_Enabled = false;
		boolean isNetwork_Enabled = false;

		try {
			isGPS_Enabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
		} catch (Exception ex) { }

		try {
			isNetwork_Enabled = lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
		} catch (Exception ex) { }

		if (!isGPS_Enabled && !isNetwork_Enabled) {

			adb.setTitle("Warning Location Services!!");
			adb.setMessage("Please Enable Location Services.");
			adb.setNegativeButton("Cancel", null);
			adb.setPositiveButton("Ok", new AlertDialog.OnClickListener() {
				public void onClick(DialogInterface dialog, int arg1) {
					// TODO Auto-generated method stub
					Intent myIntent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
					startActivity(myIntent);
				}
			});
			adb.show();

		}

	}

}