C# EditText.RequestFocus方法代码示例

        protected override void OnCreate(Android.OS.Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);
            SetContentView(Resource.Layout.xy_chart);
            mValue = FindViewById<EditText>(Resource.Id.xValue);
            mRenderer.ZoomButtonsVisible = true;
            mRenderer.StartAngle = 180;
            mRenderer.DisplayValues = true;

            mAdd = FindViewById<Button>(Resource.Id.add);
            mAdd.Enabled = true;
            mValue.Enabled = true;

            mAdd.Click += (e, s) =>
            {
                double value = 0;
                try
                {
                    value = Double.Parse(mValue.Text);
                }
                catch (Java.Lang.NumberFormatException)
                {
                    mValue.RequestFocus();
                    return;
                }
                mValue.Text = "";
                mValue.RequestFocus();
                mSeries.Add("Series " + (mSeries.ItemCount + 1), value);
                SimpleSeriesRenderer renderer = new SimpleSeriesRenderer();
                renderer.Color = COLORS[(mSeries.ItemCount - 1) % COLORS.Length];
                mRenderer.AddSeriesRenderer(renderer);
                mChartView.Repaint();
            };
        }

        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate (bundle);
            if (!((GlobalvarsApp)this.Application).ISLOGON) {
                Finish ();
            }
            SetTitle (Resource.String.title_payment);
            SetContentView (Resource.Layout.Payment);
            string samt = Intent.GetStringExtra ("amount") ?? "0";
            amount = Convert.ToDouble (samt);

            txtAmt = FindViewById<EditText> (Resource.Id.payamt);
            txtRound = FindViewById<EditText> (Resource.Id.payround);
            txtTotal = FindViewById<EditText> (Resource.Id.paytotal);
            txtCash = FindViewById<EditText> (Resource.Id.paycash);
            txtChange = FindViewById<EditText> (Resource.Id.paychange);
            txtAmt.Text = amount.ToString ("n2");
            double roundVal=0;
            double ttlAmt = Utility.AdjustToNear (amount, ref roundVal);
            txtRound.Text = roundVal.ToString ("n2");
            txtTotal.Text = ttlAmt.ToString ("n2");
            txtCash.EditorAction += HandleEditorAction;
            txtCash.AfterTextChanged += TxtCash_AfterTextChanged;
            Button butInvBack= FindViewById<Button> (Resource.Id.payok);
            butInvBack.Click += (object sender, EventArgs e) => {
                base.OnBackPressed ();
            };
            txtCash.RequestFocus ();
        }

 protected override async void OnCreate(Bundle savedInstanceState)
 {
     base.OnCreate(savedInstanceState);
     SetContentView(Resource.Layout.Login);
     GlobalServices.XjtuSite.Account.IsLoggedInChanged += Account_IsLoggedInChanged;
     if (!await UpdateAccountStatus())
     {
         userNameView = FindViewById<EditText>(Resource.Id.accountNameEdit);
         passwordView = FindViewById<EditText>(Resource.Id.passwordEdit);
         savePasswordCheckBox = FindViewById<CheckBox>(Resource.Id.savePasswordCheckbox);
         loginButton = FindViewById<Button>(Resource.Id.loginButton);
         //ÔØÈëÉèÖá£
         using (var pref = GetPreferences(FileCreationMode.Private))
         {
             userNameView.Text = pref.GetString("userName", "");
             passwordView.Text = pref.GetString("password", "");
             savePasswordCheckBox.Checked = pref.GetBoolean("savePassword", false);
         }
         if (!string.IsNullOrWhiteSpace(userNameView.Text)) passwordView.RequestFocus();
         //ÕìÌýʼþ¡£
         EventHandler<TextChangedEventArgs> userNamePasswordChanged = (_, e) =>
         {
             loginButton.Enabled = !string.IsNullOrWhiteSpace(userNameView.Text) &&
                                   !string.IsNullOrEmpty(passwordView.Text);
         };
         userNameView.TextChanged += userNamePasswordChanged;
         passwordView.TextChanged += userNamePasswordChanged;
         savePasswordCheckBox.CheckedChange += SavePasswordCheckBox_CheckedChange;
         loginButton.Click += LoginButton_Click;
     }
 }

        public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
        {
            base.OnCreateView (inflater, container, savedInstanceState);

            var view = inflater.Inflate (Resource.Layout.QuoteLayout, container, false);

            quoteLocation = view.FindViewById<EditText> (Resource.Id.quoteLocation);
            quoteModel = view.FindViewById<EditText> (Resource.Id.quoteModel);
            quotePrice = view.FindViewById<EditText> (Resource.Id.quotePrice);
            quotePosition = view.FindViewById<EditText> (Resource.Id.quotePosition);
            quoteButton = view.FindViewById<Button> (Resource.Id.quoteButton);

            quoteLocation.Text = location;
            quoteModel.Text = model;

            quotePrice.RequestFocus ();

            quoteButton.Click += delegate {

                double price;
                bool isDouble = Double.TryParse(quotePrice.Text, out price);
                if(isDouble) {
                    if (price > minPrice) {
                        if (price < minPrice * 1.6) {

                            position = quotePosition.Text;

                            if (position.Length < 15) {
                                Thread thread = new Thread(() => { Database.quote(location, model, quotePrice.Text, position); });
                                thread.Start();
                            }
                            else {
                                Thread thread = new Thread(() => { Database.quote(location, model, quotePrice.Text, ""); });
                                thread.Start();
                            }
                        }
                        quotePrice.SetBackgroundColor(Android.Graphics.Color.Lime);

                        Toast.MakeText(Application.Context, "成功報價！更新中...", ToastLength.Short).Show();

                        var activity = (MainActivity)Activity;

                        Thread thread2 = new Thread(() => { activity.FragmentManager.PopBackStack(); Thread.Sleep(1000); activity.updateGUI(Database.select(location));
                            activity.RunOnUiThread(() => {
                                Toast.MakeText(Application.Context, "更新成功！", ToastLength.Short).Show();
                            });
                        });
                        thread2.Start();

                    }
                    else { quotePrice.SetBackgroundColor(Android.Graphics.Color.Red); quotePrice.Error = "有幾多我同你買幾多!"; }
                }
                else { quotePrice.SetBackgroundColor(Android.Graphics.Color.Red); quotePrice.Error = "Enter number!"; }

            };

            return view;
        }

        private void SetViews()
        {
            _email = Activity.FindViewById<EditText>(Resource.Id.email);
            _email.RequestFocus();

            _confirmEmail = Activity.FindViewById<EditText>(Resource.Id.confirmEmail);
            _userName = Activity.FindViewById<EditText>(Resource.Id.userName);
            _password = Activity.FindViewById<EditText>(Resource.Id.password);
            _confirmPassword = Activity.FindViewById<EditText>(Resource.Id.confirmPassword);
            _submit = Activity.FindViewById<Button>(Resource.Id.submit);
        }

 public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
 {
     try
     {
         _view = inflater.Inflate(Resource.Layout.InputDialog, container);
         _editTextCvvValue = (EditText)_view.FindViewById(Resource.Id.editTextCvvValue);
         _textViewMessage = (TextView)_view.FindViewById(Resource.Id.textViewMessage);
         _buttonOk = _view.FindViewById<Button>(Resource.Id.buttonOk);
         _buttonOk.Click += ButtonOkClick;
         string title = this.Arguments.GetString("title", "PI");
         string message = this.Arguments.GetString("message", "Input the value");
         this.Dialog.SetTitle(title);
         _textViewMessage.Text = message;
         _editTextCvvValue.RequestFocus();
         this.Dialog.Window.SetSoftInputMode(SoftInput.StateVisible);
     }
     catch (Exception ex)
     {
         Helpers.Alert(_context, "PI - CvvInputFragment - OnCreateView", ex.Message, false);
     }
     return _view;
 }

		protected override void OnCreate (Bundle savedInstanceState)
		{
			base.OnCreate (savedInstanceState);
            SetContentView(Resource.Layout.main);

            _itemListView = FindViewById<ListView>(Resource.Id.itemListView);
            _itemListView.OnItemClickListener = this;
            _itemListView.OnItemLongClickListener = this;

            _addItemEditText = FindViewById<EditText>(Resource.Id.newItemText);
            _addItemEditText.SetOnKeyListener(this);
            _addItemEditText.RequestFocus();

            InitItemListAdapter();
            _taskMgr.TasksUpdated += (sender, e) => {
                _listAdapter.Clear();
                _listAdapter.AddAll((ICollection)e);
                _listAdapter.NotifyDataSetChanged();
            };

            //Step 11A - Start sync
		}

        public void Binding_TwoWayFromEditTextToCheckBoxWithObserveEvent_BindingGetsUpdated()
        {
            var control1 = new EditText(Application.Context);
            var control2 = new CheckBox(Application.Context);

            var binding = new Binding<string, bool>(
                control1,
                () => control1.Text,
                control2,
                () => control2.Checked,
                BindingMode.TwoWay)
                .ObserveSourceEvent(UpdateTriggerMode.LostFocus)
                .ObserveTargetEvent(); // LostFocus doesn't work programatically with CheckBoxes

            Assert.AreEqual(string.Empty, control1.Text);
            Assert.IsFalse(control2.Checked);
            var value = "True";
            control1.RequestFocus();
            control1.Text = value;
            Assert.AreEqual(value, control1.Text);
            Assert.IsFalse(control2.Checked);
            control1.ClearFocus();
            Assert.IsTrue(control2.Checked);

            control2.Checked = false;
            Assert.IsFalse(control2.Checked);
            Assert.AreEqual("False", control1.Text);
        }

        public void Binding_OneWayFromEditTextToViewModelWithObserveEvent_BindingGetsUpdated()
        {
            var vm = new TestViewModel
            {
                Model = new TestModel()
            };

            var control1 = new EditText(Application.Context);

            var binding = new Binding<string, string>(
                control1,
                () => control1.Text,
                vm,
                () => vm.Model.MyProperty)
                .ObserveSourceEvent(UpdateTriggerMode.LostFocus);

            Assert.AreEqual(string.Empty, control1.Text);
            Assert.AreEqual(string.Empty, vm.Model.MyProperty);
            var value = DateTime.Now.Ticks.ToString();
            control1.RequestFocus();
            control1.Text = value;
            Assert.AreEqual(value, control1.Text);
            Assert.AreEqual(string.Empty, vm.Model.MyProperty);
            control1.ClearFocus();
            Assert.AreEqual(control1.Text, vm.Model.MyProperty);
        }

        void Txtbarcode_AfterTextChanged(EditText txtbarcode)
        {
            //EditText txtbarcode = FindViewById<EditText> (Resource.Id.txtbarcode);
            if (string.IsNullOrEmpty (txtbarcode.Text)) {
                txtbarcode.RequestFocus ();
                return;
            }

            var found= items.Where(x=>x.Barcode == txtbarcode.Text).ToList();
            if (found.Count == 0) {
                txtbarcode.Text = "";
                return;
            }
            var item = found [0];
            AddBarCodeItem (item);
            RefreshItemList ();
            txtbarcode.Text = "";
            txtbarcode.RequestFocus ();
        }

        public void Binding_OneWayFromEditTextToCheckBoxWithObserveEvent_BindingGetsUpdated()
        {
            var control1 = new EditText(Application.Context);
            var control2 = new CheckBox(Application.Context);

            var binding = new Binding<string, bool>(
                control1,
                () => control1.Text,
                control2,
                () => control2.Checked)
                .ObserveSourceEvent(UpdateTriggerMode.LostFocus);

            Assert.AreEqual(string.Empty, control1.Text);
            Assert.IsFalse(control2.Checked);
            var value = "True";
            control1.RequestFocus();
            control1.Text = value;
            Assert.AreEqual(value, control1.Text);
            Assert.IsFalse(control2.Checked);
            control1.ClearFocus();
            Assert.IsTrue(control2.Checked);
        }

        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate (bundle);
            SetContentView (Resource.Layout.LoginActivitys);

            ColorDrawable colorDrawable = new ColorDrawable (Color.ParseColor (Helpers.ColorHeader));
            ActionBar.SetBackgroundDrawable (colorDrawable);

            BtnFacebook = FindViewById<Button> (Resource.Id.BtnFacebook);
            BtnRegister = FindViewById<Button> (Resource.Id.BtnRegister);
            BtnLogin = FindViewById<Button> (Resource.Id.BtnLogin);

            TxtLogin = FindViewById<EditText> (Resource.Id.TxtLogin);
            TxtPwd = FindViewById<EditText> (Resource.Id.TxtPwd);
            BtnFacebook.Visibility = ViewStates.Gone;

            #if DEBUG

            TxtLogin.Text="[email protected]";
            TxtPwd.Text="123456";

            #endif

            BtnRegister.Click += (sender, e) => {

                var datosActivity = new Intent (this, typeof(RegisterActivity));
                StartActivity (datosActivity);

            };

            BtnFacebook.Click += (sender, e) => {
                var webAuth = new Intent (this, typeof(FBWebViewAuthActivity));
                webAuth.PutExtra ("AppId", AppId);
                webAuth.PutExtra ("ExtendedPermissions", ExtendedPermissions);
                StartActivityForResult (webAuth, 0);
            };

            BtnLogin.Click += async (sender, e) => {

                if (TxtLogin.Text == string.Empty) {
                    TxtLogin.SetError ("Digite su Email", null);
                    TxtLogin.RequestFocus ();
                    return;
                }

                if (TxtPwd.Text == string.Empty) {
                    TxtPwd.SetError ("Digite su Contraseña", null);
                    TxtPwd.RequestFocus ();
                    return;
                }

                _ProgressDialog = ProgressDialog.Show (this, "Por favor espera...", "Procesando info...", true);

                ResultMsg<Users> user=	await _Bussines.Login (TxtLogin.Text, TxtPwd.Text);

                _ProgressDialog.Dismiss();

                if(user!=null && user.Dato!=null){

                    this.SetUserDatos(user.Dato);
                    var datosActivity = new Intent (this, typeof(GridActivity));
                    StartActivity (datosActivity);
                    Finish();

                }else{

                    Toast.MakeText (ApplicationContext, "Error: Su Usuario o Contraseña es erradas", ToastLength.Long).Show ();
                }

            };

            try {
                Account[] accounts = AccountManager.Get (this).GetAccountsByType ("com.google");

                foreach (Account account in accounts) {

                    if (!string.IsNullOrEmpty (account.Name)) {
                        TxtLogin.Text = account.Name;
                        return;
                    }

                    //accountsList.add(item);
                }
            } catch (Exception) {
                return;
            }
        }

        public override Dialog OnCreateDialog(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);
            // Begin building a new dialog.
            this.SetStyle(DialogFragmentStyle.Normal,Android.Resource.Style.ThemeDialog);
            var builder = new AlertDialog.Builder (this.Activity);
            //Get the layout inflater
            var inflater = Activity.LayoutInflater;

            var view = inflater.Inflate(Resource.Layout.Payment, null);
            txtAmt = view.FindViewById<EditText> (Resource.Id.payamt);
            if (txtAmt != null) {
                txtRound = view.FindViewById<EditText> (Resource.Id.payround);
                txtTotal = view.FindViewById<EditText> (Resource.Id.paytotal);
                txtCash = view.FindViewById<EditText> (Resource.Id.paycash);
                txtChange = view.FindViewById<EditText> (Resource.Id.paychange);
                Button butInvBack = view.FindViewById<Button> (Resource.Id.payok);
                txtCust = view.FindViewById<EditText> (Resource.Id.newinv_custname);
                txtRemark = view.FindViewById<EditText> (Resource.Id.newinv_remark);
                txtInvno = view.FindViewById<EditText> (Resource.Id.newinvno);

                txtRemark.Text = Remark;
                txtInvno.Text = InvNo;
                txtCust.Text = CustName;
                txtAmt.Text = _amount.ToString ("n2");
                double roundVal = 0;
                double ttlAmt = Utility.AdjustToNear (_amount, ref roundVal);
                txtRound.Text = roundVal.ToString ("n2");
                txtTotal.Text = ttlAmt.ToString ("n2");
                txtCash.EditorAction += HandleEditorAction;
                txtCash.AfterTextChanged += TxtCash_AfterTextChanged;
                txtCash.Text = "";
                butInvBack.Visibility = ViewStates.Gone;

                builder.SetView (view);
                builder.SetPositiveButton (Resources.GetString(Resource.String.button_paidprint) , HandlePositiveButtonClick);
                builder.SetNegativeButton (Resources.GetString(Resource.String.button_cancel),HandleNegativeButtonClick );
                builder.SetNeutralButton (Resources.GetString(Resource.String.button_paid), HandlePaidOnlyButtonClick );
                builder.SetCancelable (false);

                txtCash.RequestFocus ();
                ShowKeyBoard (view);
            }
            var dialog = builder.Create();
            //Now return the constructed dialog to the calling activity

            WindowManagerLayoutParams wmlp = dialog.Window.Attributes;
            wmlp.Gravity = GravityFlags.Top | GravityFlags.Center;
            return dialog;
        }

        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate (bundle);
            if (!((GlobalvarsApp)this.Application).ISLOGON) {
                Finish ();
            }
            SetContentView (Resource.Layout.CreateInvoice);
            pathToDatabase = ((GlobalvarsApp)this.Application).DATABASE_PATH;
            compCode = ((GlobalvarsApp)this.Application).COMPANY_CODE;
            branchCode = ((GlobalvarsApp)this.Application).BRANCH_CODE;

            EventManagerFacade.Instance.GetEventManager().AddListener(this);

            // Create your application here
            _date = DateTime.Today;
            spinner = FindViewById<Spinner> (Resource.Id.newinv_custcode);
            Spinner spinnerType = FindViewById<Spinner> (Resource.Id.newinv_type);
            Button butSave = FindViewById<Button> (Resource.Id.newinv_bsave);
            Button butNew = FindViewById<Button> (Resource.Id.newinv_cancel);
            Button butFind = FindViewById<Button> (Resource.Id.newinv_bfind);
            spinner.ItemSelected += new EventHandler<AdapterView.ItemSelectedEventArgs> (spinner_ItemSelected);
            butSave.Click += butSaveClick;
            butNew.Click += butCancelClick;
            TextView invno =  FindViewById<TextView> (Resource.Id.newinv_no);
            invno.Text = "AUTO";
            EditText trxdate =  FindViewById<EditText> (Resource.Id.newinv_date);
             			trxdate.Text = _date.ToString ("dd-MM-yyyy");
            trxdate.Click += delegate(object sender, EventArgs e) {
                ShowDialog (0);
            };
            butFind.Click+= (object sender, EventArgs e) => {
                ShowCustLookUp();
            };

            ccType =  FindViewById<EditText> (Resource.Id.newinv_cctype);
            ccNo =  FindViewById<EditText> (Resource.Id.newinv_ccno);
            ccNo.AfterTextChanged+= CcNo_AfterTextChanged;

            ccNo.RequestFocus ();
            apara =  DataHelper.GetAdPara (pathToDatabase,compCode,branchCode);
            //SqliteConnection.CreateFile(pathToDatabase);
            LoadTrader ();

            List<string> icodes = new List<string> ();
            foreach (Trader item in items) {
                icodes.Add (item.CustCode+" | "+item.CustName);
            }

            dataAdapter = new ArrayAdapter<String> (this, Resource.Layout.spinner_item, icodes);
            dataAdapter2 =ArrayAdapter.CreateFromResource (
                            this, Resource.Array.trxtype, Resource.Layout.spinner_item);

            // Drop down layout style - list view with radio button
            dataAdapter.SetDropDownViewResource(Resource.Layout.SimpleSpinnerDropDownItemEx);
            dataAdapter2.SetDropDownViewResource(Android.Resource.Layout.SimpleSpinnerDropDownItem);

            // attaching data adapter to spinner
            spinner.Adapter =dataAdapter;
            spinnerType.Adapter =dataAdapter2;
        }

        public void Binding_TwoWayFromEditTextToEditTextWithObserveEvent_BindingGetsUpdated()
        {
            var control1 = new EditText(Application.Context);
            var control2 = new EditText(Application.Context);

            var binding = new Binding<string, string>(
                control1,
                () => control1.Text,
                control2,
                () => control2.Text,
                BindingMode.TwoWay)
                .ObserveSourceEvent(UpdateTriggerMode.LostFocus)
                .ObserveTargetEvent(UpdateTriggerMode.LostFocus);

            Assert.AreEqual(string.Empty, control1.Text);
            Assert.AreEqual(string.Empty, control2.Text);
            var value = DateTime.Now.Ticks.ToString();
            control1.RequestFocus();
            control1.Text = value;
            Assert.AreEqual(value, control1.Text);
            Assert.AreEqual(string.Empty, control2.Text);
            control1.ClearFocus();
            Assert.AreEqual(control1.Text, control2.Text);

            var newValue = value + "Suffix";
            control2.RequestFocus();
            control2.Text = newValue;
            Assert.AreEqual(newValue, control2.Text);
            Assert.AreEqual(value, control1.Text);
            control2.ClearFocus();
            Assert.AreEqual(control2.Text, control1.Text);
        }