c# - Xamarin Android 和日期选择器

Question

Android 中的日期选择器比 Windows Phone 中的日期选择器复杂得多，Windows 中的简单代码是这样的。 (日期选择器和文本框)

public MainPage()
    {
        InitializeComponent();
        this.datePicker1.ValueChanged += new EventHandler<DateTimeValueChangedEventArgs>
            (datePicker1_ValueChanged);
        DateTime MyVal = DateTime.Today;
       textBlock1.Text = MyVal.AddDays(35).ToShortDateString();

    }

    private void datePicker1_ValueChanged(object sender, DateTimeValueChangedEventArgs e)
    {
        DateTime date = (DateTime)e.NewDateTime;
        this.textBlock1.Text = date.AddDays(35).ToShortDateString();

    }

如果您使用 Xamarin，您可以使用 C# 代码还是使用 Java 代码。哪种方法最简单？

Answer 1

axml:

<EditText
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/date_EditText" />

Activity .cs

    [Activity(Label = "YourApp", MainLauncher = true, Icon = "@drawable/icon")]
public class MainActivity : Activity, IOnDateSetListener
{
    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);
        SetContentView(Resource.Layout.Main);

        var dateEditText = FindViewById<EditText>(Resource.Id.date_EditText);
        dateEditText.Text = DateTime.Now.ToShortDateString();
        dateEditText.Click += delegate
        {
            OnClickDateEditText();
        };
    }

    private void OnClickDateEditText()
    {
        var dateTimeNow = DateTime.Now;
        DatePickerDialog datePicker = new DatePickerDialog(this, this, dateTimeNow.Year, dateTimeNow.Month, dateTimeNow.Day);
        datePicker.Show();
    }

    public void OnDateSet(DatePicker view, int year, int month, int dayOfMonth)
    {
        FindViewById<EditText>(Resource.Id.date_EditText).Text = new DateTime(year, month, dayOfMonth).ToShortDateString();
    }
}