C# Button.RequestFocus方法代码示例

        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate (bundle);

            // Set our view from the "main" layout resource
            SetContentView (Resource.Layout.Main);

            // Initialize IoT Hub client
            Device = new MyClass();

            // If you are developing and want to avoid having to enter the full connection string on the device,
            // you can temporarily hard code it here. Comment this when done!
            //Device.DisplayName = "[DisplayName]";
            //Device.ConnectionString = "[ConnectionString]";

            // Prepare UI elements
            buttonConnect = FindViewById<Button>(Resource.Id.buttonConnect);
            buttonConnect.Enabled = false;
            buttonConnect.Click += ButtonConnect_Click;

            buttonSend = FindViewById<Button>(Resource.Id.buttonSend);
            buttonSend.Enabled = false;
            buttonSend.Click += ButtonSend_Click;

            textDeviceName = FindViewById<TextView>(Resource.Id.textDeviceName);
            textDeviceName.TextChanged += TextDeviceName_TextChanged;
            textDeviceName.Text = Device.DisplayName;

            textConnectionString = FindViewById<TextView>(Resource.Id.textConnectionString);
            textConnectionString.TextChanged += TextConnectionString_TextChanged;
            textConnectionString.Text = Device.ConnectionString;

            lblTemperature = FindViewById<TextView>(Resource.Id.lblTemperature);
            SeekBar seekTemperature = FindViewById<SeekBar>(Resource.Id.seekBarTemperature);
            seekTemperature.ProgressChanged += SeekTemperature_ProgressChanged;
            seekTemperature.Progress = 50;

            lblHumidity = FindViewById<TextView>(Resource.Id.lblHumidity);
            SeekBar seekHumidity = FindViewById<SeekBar>(Resource.Id.seekBarHumidity);
            seekHumidity.ProgressChanged += SeekHumidity_ProgressChanged;
            seekHumidity.Progress = 50;

            // Set focus to the connect button
            buttonConnect.RequestFocus();
        }

//		async void example(){
//			ParseObject gameScore = new ParseObject("GameScore");
//			gameScore["score"] = 1337;
//			gameScore["playerName"] = "Sean Plott";
//			await gameScore.SaveAsync();
//		}
        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);
//			ParseClient.Initialize("LNAuxom26NKczyL2hfU3deDyFvxkR9vAEVt3NYom",
//				"pTK01DCWyIlw3DQJludWbtnBgvpe2PqNFKa8aDmm");
			//example ();
            // Set our view from the "main" layout resource
            SetContentView(Resource.Layout.Main);
			string Dominio_webservice = "http://alertapp-jovel.rhcloud.com/index.php/Mobile";
            WebServices = new Dictionary<string, System.Uri> {
				{"getDenuncias",new System.Uri(Dominio_webservice+"/getDenuncias")},
				{"setDenuncia",new System.Uri(Dominio_webservice+"/setDenuncia")},
				{"getDenunciaPicture",new System.Uri(Dominio_webservice+"/getDenunciaPicture")}
            };
			//este diccionario dejo de usarse pero puede resultar util luego
            ColorTipoDenuncia = new Dictionary<int, float>{
                {1, BitmapDescriptorFactory.HueRed},
                {2, BitmapDescriptorFactory.HueAzure},
                {3, BitmapDescriptorFactory.HueGreen},
                {4, BitmapDescriptorFactory.HueYellow},
            };
			MarkerTipoDenuncia = new Dictionary<int, int>{
				{1, Resource.Drawable.corte_marker},
				{2, Resource.Drawable.fuga_marker},
				{3, Resource.Drawable.damage_marker},
				{4, Resource.Drawable.otros_marker}
			};
            btnNormal = FindViewById<Button>(Resource.Id.btnNormal);
            btnSatellite = FindViewById<Button>(Resource.Id.btnSatellite);
            ibtnReload = FindViewById<ImageButton>(Resource.Id.ibtnReload);
            ibtnGps = FindViewById<ImageButton>(Resource.Id.ibtnGps);
            ibtnSearch = FindViewById<ImageButton>(Resource.Id.ibtnSearch);
            txtBuscar = FindViewById<EditText>(Resource.Id.txtBuscar);
            txtBuscar.ClearFocus();
            btnNormal.RequestFocus();
            btnNormal.Click +=btnNormal_Click;
            btnSatellite.Click +=btnSatellite_Click;
            txtBuscar.EditorAction += txtBuscar_EditorAction;
            ibtnReload.Click += ibtnReload_Click;
            ibtnGps.Click += ibtnGps_Click;
            ibtnSearch.Click += ibtnSearch_Click;

            toolBar = FindViewById<SupportToolbar>(Resource.Id.toolbar);
            toolBar.SetTitleTextColor(Color.White);
            mDrawerLayout = FindViewById<DrawerLayout>(Resource.Id.drawe_layout);
            mLeftDrawer = FindViewById<ListView>(Resource.Id.left_drawer);
            SetSupportActionBar(toolBar);

            mLeftDataSet = new List<string>();
            mLeftDataSet.Add("Bienvenido Luis Jovel");
			mLeftDataSet.Add("Listado de Denuncias");
            mLeftDataSet.Add("Filtrar Resultados");
            mLeftDataSet.Add("     Ver Todos");
            mLeftDataSet.Add("     Corte de servicio");
            mLeftDataSet.Add("     Fuga de Agua");
            mLeftDataSet.Add("     Daño a Infraestructura");
            mLeftDataSet.Add("     Otros");
            mLeftDataSet.Add("Cerrar Sesion");
            mLeftAdapter = new ArrayAdapter<string>(this, Android.Resource.Layout.SimpleListItem1, mLeftDataSet);
            mLeftDrawer.ItemClick += mLeftDrawer_ItemClick;
            mLeftDrawer.Adapter = mLeftAdapter;

            mDrawerToggle = new MyActionBarDrawerToggle(
                this,
                mDrawerLayout,
                Resource.String.openDrawer,
                Resource.String.closeDrawer
            );
            mDrawerLayout.SetDrawerListener(mDrawerToggle);
            SupportActionBar.SetHomeButtonEnabled(true);
            SupportActionBar.SetDisplayShowTitleEnabled(true);
            SupportActionBar.SetDisplayHomeAsUpEnabled(true);
            mDrawerToggle.SyncState();
			//GPS NUEVO
			setupGPS();
            SetUpMap();
			//GPS OBSOLETO
//            InitializeLocationManager();
            cliente = new WebClient();
            //llamar a web service
            cliente.DownloadDataAsync(WebServices["getDenuncias"]);
            cliente.DownloadDataCompleted += cliente_DownloadDataCompleted;           

            //alertdialog
            builder = new Android.App.AlertDialog.Builder(this);
            alert = builder.Create();
        }

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

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

            mTxtUserName = view.FindViewById<EditText> (Resource.Id.txtUserName);
            mTxtPassword = view.FindViewById<EditText> (Resource.Id.txtPassword);

            mCheckbox = view.FindViewById<CheckBox> (Resource.Id.LoginCheckBox);

            try{
                var CheckPrefs = Application.Context.GetSharedPreferences("MyCheckState", FileCreationMode.Private);
                checkState = CheckPrefs.GetString("CheckState", null);

            }catch{

            }

            switch (checkState)
            {
            case "False":
                mCheckbox.Checked = false;
                break;
            case "True":
                mCheckbox.Checked = true;
                try{
                    var UsernamePrefs = Application.Context.GetSharedPreferences("username", FileCreationMode.Private);
                    mTxtUserName.Text = UsernamePrefs.GetString("username", null);

                }catch{

                }
                try{
                    var PasswordPrefs = Application.Context.GetSharedPreferences("password", FileCreationMode.Private);
                    mTxtPassword.Text = PasswordPrefs.GetString("password", null);

                }catch{

                }
                break;
            default:
                mCheckbox.Checked = true;
                break;
            }

            mBtnSignUp = view.FindViewById<Button> (Resource.Id.btnLogInDialog);
            mErrorText = view.FindViewById<TextView> (Resource.Id.txtError);

            mProgressBar = view.FindViewById<ProgressBar> (Resource.Id.progressBar);

            mProgressBar.Visibility = ViewStates.Invisible;

            mBtnSignUp.Click +=  (object sender, EventArgs e) => {

                mProgressBar.Visibility = ViewStates.Visible;

                mTxtUserName.ClearFocus();
                mErrorText.ClearFocus();
                mBtnSignUp.RequestFocus();

                mErrorText.Text=string.Format("登录中...");

                //关键盘

                InputMethodManager inputManager = (InputMethodManager)Activity.GetSystemService(Context.InputMethodService);

                inputManager.HideSoftInputFromWindow(mTxtPassword.WindowToken, HideSoftInputFlags.None);
                inputManager.HideSoftInputFromWindow(mTxtUserName.WindowToken, HideSoftInputFlags.None);

                mWorker=new BackgroundWorker();
                mWorker.WorkerSupportsCancellation = true;

                mWorker.DoWork+= delegate(object sender1, DoWorkEventArgs e1) {

                    BackgroundWorker mworker = sender1 as BackgroundWorker;

                    if (mworker.CancellationPending == true) {
                        e1.Cancel = true;
                    } else {
                        checkPassword();
                    }

                };

                mWorker.RunWorkerCompleted+=delegate(object sender1, RunWorkerCompletedEventArgs e1) {

                    if (e1.Cancelled == true) {

                    } else if (!(e1.Error == null)) {

                    } else {
                        worker_RunWorkerCompleted();
                    }

                };

                if (mWorker.IsBusy != true) {
                    mWorker.RunWorkerAsync ();
                }
//.........这里部分代码省略.........