Xamarin Android和Mvvmcross。在axml中绑定OnEditorAction

情况：我有一个包含EditText的视图列表。我希望用户能够修改文本，并且只在按下键盘上的“完成”按钮时将新文本发送到viewmodel。我的编辑文本已绑定，如下所示

<EditText
   android:id="@+id/textNumero"
   android:layout_width="0dp"
   android:layout_height="fill_parent"
   android:layout_weight="0.23"
   android:textColor="#ffffffff"
   local:MvxBind="Text BarilId" />

不幸的是，我无法访问我的活动，因为我正在绑定列表中的类

因此，我想在我的类中绑定一个命令，如下所示：

<EditText
       android:id="@+id/textNumero"
       android:layout_width="0dp"
       android:layout_height="fill_parent"
       android:layout_weight="0.23"
       android:textColor="#ffffffff"
       local:MvxBind="OnEditorAction EditCommand"
       local:MvxBind="Text BarilId" />

但我不知道如何将

ImeAction.Done

传递给我的命令，或者我是否收到类似的消息

---

关于剩下的部分，我可以得到一些帮助吗？

您可以创建带有命令的自定义EditText，然后将其绑定到axml中

另一种选择是使用：

idEditText.OnEditorAction (ImeAction.Done) += (ViewModel as MyViewModel).EditCommand.Execute(whateveryouwanttouse);

要完成活动，您可以使用：

Mvx.Resolve<IMvxAndroidCurrentTopActivity>().Activity

Mvx.Resolve（）活动

最后，我用斯图尔特的回答：

我只是稍微修改了代码，这样我就可以在SubscibeToEvents（）中使用我的OnEditorAction并修改handle函数。全班同学都是这样的：

public class MvxEditTextEditForBinding: MvxAndroidTargetBinding
{
    protected EditText EditText
    {
        get { return (EditText)Target; }
    }

    private bool _subscribed;

    public MvxEditTextEditForBinding(EditText view)
        : base(view)
    {
    }

    protected override void SetValueImpl(object target, object value)
    {
        var editText = EditText;
        if (editText == null)
            return;

        value = value ?? string.Empty;
        editText.Text = value.ToString();
    }

    public override MvxBindingMode DefaultMode
    {
        get { return MvxBindingMode.TwoWay; }
    }

    public override void SubscribeToEvents()
    {
        var editText = EditText;
        if (editText == null)
            return;

        editText.EditorAction += HandleEditForChange;
        _subscribed = true;
    }

    private void HandleEditForChange(object sender, TextView.EditorActionEventArgs  e)
    {
        var editText = EditText;

        InputMethodManager imm = (InputMethodManager)editText.Context.GetSystemService(Context.InputMethodService); 
        imm.HideSoftInputFromWindow(editText.WindowToken, 0);


        e.Handled = false;
        if (e.ActionId == ImeAction.Done)
        {
            FireValueChanged(editText.Text);
            e.Handled = true;   
        }
    }

    public override Type TargetType
    {
        get { return typeof(string); }
    }

    protected override void Dispose(bool isDisposing)
    {
        if (isDisposing)
        {
            var editText = EditText;
            if (editText != null && _subscribed)
            {
                editText.EditorAction -= HandleEditForChange;
                _subscribed = false;
            }
        }
        base.Dispose(isDisposing);
    }
}

}

Mvx.Resolve<IMvxAndroidCurrentTopActivity>().Activity

public class MvxEditTextEditForBinding: MvxAndroidTargetBinding
{
    protected EditText EditText
    {
        get { return (EditText)Target; }
    }

    private bool _subscribed;

    public MvxEditTextEditForBinding(EditText view)
        : base(view)
    {
    }

    protected override void SetValueImpl(object target, object value)
    {
        var editText = EditText;
        if (editText == null)
            return;

        value = value ?? string.Empty;
        editText.Text = value.ToString();
    }

    public override MvxBindingMode DefaultMode
    {
        get { return MvxBindingMode.TwoWay; }
    }

    public override void SubscribeToEvents()
    {
        var editText = EditText;
        if (editText == null)
            return;

        editText.EditorAction += HandleEditForChange;
        _subscribed = true;
    }

    private void HandleEditForChange(object sender, TextView.EditorActionEventArgs  e)
    {
        var editText = EditText;

        InputMethodManager imm = (InputMethodManager)editText.Context.GetSystemService(Context.InputMethodService); 
        imm.HideSoftInputFromWindow(editText.WindowToken, 0);


        e.Handled = false;
        if (e.ActionId == ImeAction.Done)
        {
            FireValueChanged(editText.Text);
            e.Handled = true;   
        }
    }

    public override Type TargetType
    {
        get { return typeof(string); }
    }

    protected override void Dispose(bool isDisposing)
    {
        if (isDisposing)
        {
            var editText = EditText;
            if (editText != null && _subscribed)
            {
                editText.EditorAction -= HandleEditForChange;
                _subscribed = false;
            }
        }
        base.Dispose(isDisposing);
    }
}