使用C# + Xamarin开发Android 应用 -- Datetime Picker

1. axml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:minWidth="25px"
android:minHeight="25px">
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/linearLayout4">
<TextView
android:text="Service Name"
android:layout_width="400px"
android:layout_height="match_parent"
android:id="@+id/lblBdServiceName" />
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/linearLayout1">
<Button
android:text="Select Date"
android:id="@+id/btnBDChooseDate"
android:layout_width="154.5dp"
android:layout_height="match_parent" />
<TextView
android:text=""
android:layout_width="400px"
android:layout_height="match_parent"
android:id="@+id/lblBDDate" />
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/linearLayout2">
<Button
android:text="Select Time"
android:id="@+id/btnBDChooseTime"
android:layout_width="154.5dp"
android:layout_height="match_parent" />
<TextView
android:text=""
android:layout_width="400px"
android:layout_height="match_parent"
android:id="@+id/lblBDTime" />
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/linearLayout3">
<TextView
android:layout_width="154.5dp"
android:layout_height="match_parent"
android:id="@+id/lblEmpty" />
<Button
android:text="Confirm"
android:id="@+id/btnBDConfirm"
android:layout_width="154.5dp"
android:layout_height="match_parent"
android:layout_marginRight="320.8dp" />
</LinearLayout>
</LinearLayout>

2. Activity.cs

public class BookingDetails : Activity
{

private TextView timeDisplay;
private Button pickTime;
private int hour;
private int minute;
const int TIME_DIALOG_ID = 0;

private TextView dateDisplay;
private Button pickDate;
private DateTime date;
const int DATE_DIALOG_ID = 1;

private DateTime serverDateTime ;

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

try
{
var lblServiceName = FindViewById<TextView>(Resource.Id.lblBdServiceName);
lblServiceName.SetText("Service 1", TextView.BufferType.Normal);

serverDateTime = DateTime.Parse("2015-5-22 15:30:26");
// Create your application here

timeDisplay = FindViewById<TextView>(Resource.Id.lblBDTime);
pickTime = FindViewById<Button>(Resource.Id.btnBDChooseTime);

// Add a click listener to the button
pickTime.Click += (o, e) => ShowDialog(TIME_DIALOG_ID);

hour = serverDateTime.Hour;
minute = serverDateTime.Minute;
UpdateDisplayTime();

// capture our View elements
dateDisplay = FindViewById<TextView>(Resource.Id.lblBDDate);
pickDate = FindViewById<Button>(Resource.Id.btnBDChooseDate);

// add a click event handler to the button
pickDate.Click += delegate { ShowDialog(DATE_DIALOG_ID); };

date = serverDateTime;
UpdateDisplayDate();

var btnCfm = FindViewById<Button>(Resource.Id.btnBDConfirm);
btnCfm.Click += (sender, args) =>
{
try
{
var serviceName = FindViewById<TextView>(Resource.Id.lblBdServiceName).Text;
var selectDate = FindViewById<TextView>(Resource.Id.lblBDDate).Text;
var selectTime = FindViewById<TextView>(Resource.Id.lblBDTime).Text;

var selectedDateTime =
DateTime.Parse(string.Format("{0} {1}", selectDate, selectTime)).ToString();
var msg = string.Format("Confirm booking service '{0}' at {1} ?", serviceName, selectedDateTime);
this.ShowDlgYesNo(msg, "Booking Confirmation",
(s, arg) =>
{
this.ShowAlert("call api book");
this.GotoActicity<MainActivity>();
},
(s, arg) =>
{
// do nothing
});
}
catch (Exception ex)
{
this.ShowAlert(ex.Message);
}

};
}
catch (Exception ex)
{
this.ShowAlert(ex.Message);
}

}

private void UpdateDisplayTime()
{
string time = string.Format("{0}:{1}", hour, minute.ToString().PadLeft(2, '0'));
timeDisplay.Text = time;

}

private void UpdateDisplayDate()
{
dateDisplay.Text = date.ToString("d");
}

private void TimePickerCallback(object sender, TimePickerDialog.TimeSetEventArgs e)
{
hour = e.HourOfDay;
minute = e.Minute;
UpdateDisplayTime();
}

void OnDateSet(object sender, DatePickerDialog.DateSetEventArgs e)
{
this.date = e.Date;
UpdateDisplayDate();
}

protected override Dialog OnCreateDialog(int id)
{
if (id == TIME_DIALOG_ID)
{
return new TimePickerDialog(this, TimePickerCallback, hour, minute, false);
}
if (id == DATE_DIALOG_ID)
{
var dlg = new DatePickerDialog(this, OnDateSet, serverDateTime.Year, serverDateTime.Month-1, serverDateTime.Day);
return dlg;
}

return null;
}
}