我有一个Android应用程序,它在HorizontalScrollView中嵌入了两个RecyclerViews。顶级RecyclerView具有类别,当您选择类别时,底部的RecyclerView会列出该类别中的项目。为了检测所选类别,我尝试使用Touch事件。当EditText获取触摸事件时,将选择该行。这部分效果很好。问题是我还需要能够编辑“类别”列表中的某些字段。如果我在EditText上绑定Touch事件,则单击它时EditText不会获得焦点。我尝试使用FocusChanged事件,但有时,当水平滚动时,顶部RecyclerView上的焦点被设置为第一个类别的EditText,从而导致所选类别发生变化。有没有办法在MvvmCross中绑定Touch事件并仍让它使绑定控件获得焦点?
这是我的项目模板的布局:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:local="http://schemas.android.com/apk/res-auto"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="2dp"
android:paddingBottom="2dp"
local:MvxBind="This View">
<TextView
android:layout_width="300dp"
android:layout_height="wrap_content"
style="@style/TableEditText"
local:MvxBind="Text Name; LongClick Name_LongClick; Touch Touch"
android:id="@+id/txtName" />
<EditText
android:layout_width="110dp"
android:layout_height="wrap_content"
style="@style/TableEditText"
android:inputType="numberDecimal|numberSigned"
android:selectAllOnFocus="true"
local:MvxBind="Text Cubes, Converter=FloatToStringConverter; Touch Touch"
android:id="@+id/txtCubes" />
<EditText
android:layout_width="110dp"
android:layout_height="wrap_content"
style="@style/TableEditText"
android:inputType="numberDecimal|numberSigned"
android:selectAllOnFocus="true"
local:MvxBind="Text Weight, Converter=IntToStringConverter; Touch Touch"
android:id="@+id/txtWeight" />
<EditText
android:layout_width="500dp"
android:layout_height="wrap_content"
style="@style/TableEditText"
android:inputType="textCapSentences"
local:MvxBind="Text Note; Touch Touch"
android:id="@+id/txtNote" />
<ImageButton
android:src="@drawable/ic_action_delete"
android:scaleType="fitCenter"
android:padding="3dp"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:layout_gravity="center"
local:MvxBind="Click DeleteClicked"
android:id="@+id/btnDeleteCategory" />
</LinearLayout>
这是我触摸事件的钩子:
public MvxCommand Touch
{
get
{
return new MvxCommand(() =>
{
SurveyView act = (Mvx.Resolve<IMvxAndroidCurrentTopActivity>().Activity as SurveyView) ?? null;
if (act != null)
{
act.SetCurrCategory(this);
}
});
}
}
这是我对Touch事件的自定义绑定:
public class MvxViewTouchBinding
: MvxAndroidTargetBinding
{
private readonly View _view;
private IMvxCommand _command;
public MvxViewTouchBinding(View view) : base(view)
{
_view = view;
_view.Touch += ViewOnTouch;
}
private void ViewOnTouch(object sender, View.TouchEventArgs eventArgs)
{
if (_command != null)
{
_command.Execute();
}
}
public override void SetValue(object value)
{
_command = (IMvxCommand)value;
}
protected override void Dispose(bool isDisposing)
{
if (isDisposing)
{
_view.Touch -= ViewOnTouch;
}
base.Dispose(isDisposing);
}
protected override void SetValueImpl(object target, object value)
{
}
public override Type TargetType
{
get { return typeof(IMvxCommand); }
}
public override MvxBindingMode DefaultMode
{
get { return MvxBindingMode.OneWay; }
}
}
这是在Setup.cs
中 registry.RegisterCustomBindingFactory<View>("Touch",
view => new MvxViewTouchBinding(view));
答案 0 :(得分:0)
我不得不将ViewOnTouch处理程序更改为:
private void ViewOnTouch(object sender, View.TouchEventArgs eventArgs)
{
eventArgs.Handled = false;
if (_command != null)
{
_command.Execute();
}
}
显然已处理默认值为true,这会导致事件链在调用此事件后终止。将其设置为false会告诉系统事件尚未正确处理,因此它会调用下一个处理程序。我猜测后续的处理程序会设置焦点。谢谢@Cheesebaron