public static Android.Support.V4.App.Fragment newInstance(Context context)
        {
            LoginFragment busrouteFragment = new LoginFragment();

            return(busrouteFragment);
        }
        protected override void OnCreate(Bundle bundle)
        {
            try
            {
                base.OnCreate(bundle);
                SetContentView(Resource.Layout.activity_main);

                //var x = MakeAsyncRequest("http://116.193.133.150/publicweb/Helpdesk_API/Login/GetDefault", "application/json");
                //var x = SampleAPICall();
                //throw new Exception(x.Result.ToString());

                /*var x = SampleAPICall();
                 * var y = x.Result.ReadAsStringAsync();*/

                mToolbar      = FindViewById <SupportToolbar>(Resource.Id.toolbar);
                mDrawerLayout = FindViewById <DrawerLayout>(Resource.Id.drawer_layout);
                mLeftDrawer   = FindViewById <ListView>(Resource.Id.left_drawer);

                loginFragment        = new LoginFragment();
                registrationFragment = new RegistrationFragment();

                mStackFragments = new Stack <SupportFragment>();

                mLeftDrawer.Tag = 0;

                SetSupportActionBar(mToolbar);

                mLeftDataSet = new List <string>();
                mLeftDataSet.Add("Login");
                mLeftDataSet.Add("Register");
                mLeftAdapter           = new ArrayAdapter <string>(this, Android.Resource.Layout.SimpleListItem1, mLeftDataSet);
                mLeftDrawer.Adapter    = mLeftAdapter;
                mLeftDrawer.ItemClick += MenuListView_ItemClick;

                /*try
                 * {
                 *  for (int i = 0; i < mLeftDrawer.Adapter.Count; i++)
                 *  {
                 *      var child = mLeftDrawer.Adapter.GetView(i, null, mLeftDrawer);
                 *      //((TextView)child).SetLinkTextColor(Resources.GetColorStateList(Resource.Color.colorWhite));
                 *      //((TextView)child).SetTextColor(Android.Graphics.Color.White);
                 *  }
                 * }
                 * catch { }*/

                mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, Resource.String.openDrawer, Resource.String.closeDrawer);

                mDrawerLayout.SetDrawerListener(mDrawerToggle);
                SupportActionBar.SetHomeButtonEnabled(true);
                SupportActionBar.SetDisplayShowTitleEnabled(true);
                SupportActionBar.SetDisplayHomeAsUpEnabled(true);
                mDrawerToggle.SyncState();

                if (bundle != null)
                {
                    if (bundle.GetString("DrawerState") == "Opened")
                    {
                        SupportActionBar.SetTitle(Resource.String.openDrawer);
                    }
                    else
                    {
                        SupportActionBar.SetTitle(Resource.String.closeDrawer);
                    }
                }
                else
                {
                    SupportActionBar.SetTitle(Resource.String.closeDrawer);
                }

                IList <Android.Support.V4.App.Fragment> fragmentsarray = SupportFragmentManager.Fragments;
                if (fragmentsarray != null && fragmentsarray.Count > default(int))
                {
                    foreach (Android.Support.V4.App.Fragment fragment in fragmentsarray)
                    {
                        string tag = fragment.Tag;
                        Android.Support.V4.App.FragmentTransaction tx = SupportFragmentManager.BeginTransaction();
                        tx.Replace(Resource.Id.main, fragment, fragment.Tag);
                        tx.Commit();
                        break;
                    }
                }
                else
                {
                    Android.Support.V4.App.FragmentTransaction tx = SupportFragmentManager.BeginTransaction();
                    tx.Replace(Resource.Id.main, loginFragment, Constants.login);
                    tx.Commit();
                }
            }
            catch (Exception ex)
            {
                this.RunOnUiThread(() =>
                {
                    Android.App.AlertDialog.Builder alertDiag = new Android.App.AlertDialog.Builder(this);
                    alertDiag.SetTitle(Resource.String.DialogHeaderError);
                    alertDiag.SetMessage(ex.Message);
                    alertDiag.SetIcon(Resource.Drawable.alert);
                    alertDiag.SetPositiveButton(Resource.String.DialogButtonOk, (senderAlert, args) =>
                    {
                    });
                    Dialog diag = alertDiag.Create();
                    diag.Show();
                    diag.SetCanceledOnTouchOutside(false);
                });
            }
        }