public void ApplyBindings(Activity activity, string viewModelPropertyName, int layoutResourceId)
{
if (ApplicationContextHolder.Context == null)
{
ApplicationContextHolder.Context = activity.ApplicationContext;
}
List <View> views = null;
List <XElement> elements = null;
if (layoutResourceId > -1)
{
/* Load the XML elements of the view. */
elements = GetLayoutAsXmlElements(activity, layoutResourceId);
}
/* If there is at least one 'Binding' attribute set in the XML file,
* get the view as objects. */
if (elements != null && elements.Any(xe => xe.Attribute(bindingXmlNamespace) != null))
{
var rootView = activity.Window.DecorView.FindViewById(Id.Content);
views = GetAllChildrenInView(rootView);
/* Remove the first views that are not part of the layout file.
* This includes the first FrameView. */
int elementsCount = elements.Count;
int difference = views.Count - elementsCount;
if (difference > 0)
{
views = views.GetRange(difference, views.Count - difference);
}
}
if (elements != null && elements.Any() && views != null && views.Any())
{
/* Get all the binding inside the XML file. */
var bindingInfos = ExtractBindingsFromLayoutFile(elements, views);
if (bindingInfos == null || !bindingInfos.Any())
{
return;
}
/* Load all the converters if there is a binding using a converter. */
if (bindingInfos.Any(info => !string.IsNullOrWhiteSpace(info.Converter)))
{
if (valueConverterTypes == null)
{
valueConverterTypes = new List <Type>();
var converters = TypeUtility.GetTypes <IValueConverter>().ToList();
if (converters.Any())
{
valueConverterTypes.AddRange(converters);
}
else if (Debugger.IsAttached)
{
Debugger.Break();
}
}
}
var binder = new BindingApplicator();
foreach (var bindingInfo in bindingInfos)
{
IValueConverter valueConverter = null;
string valueConverterName = bindingInfo.Converter;
if (!string.IsNullOrWhiteSpace(valueConverterName))
{
var valueConverterType = valueConverterTypes.FirstOrDefault(t => t.Name == valueConverterName);
if (valueConverterType != null)
{
var valueConverterConstructor = valueConverterType.GetConstructor(Type.EmptyTypes);
if (valueConverterConstructor != null)
{
valueConverter = valueConverterConstructor.Invoke(null) as IValueConverter;
}
else
{
throw new InvalidOperationException(
$"Value converter {valueConverterName} needs "
+ "an empty constructor to be instanciated.");
}
}
else
{
throw new InvalidOperationException(
$"There is no converter named {valueConverterName}.");
}
}
binder.ApplyBinding(bindingInfo, activity, viewModelPropertyName, valueConverter, unbindActions);
}
}
}
public void ApplyBindings(View view, object dataContext, int layoutResourceId)
{
Context context = view.Context;
if (ApplicationContextHolder.Context == null)
{
ApplicationContextHolder.Context = context.ApplicationContext;
}
List <View> views = null;
List <XElement> elements = null;
if (layoutResourceId > -1)
{
/* Load the XML elements of the view. */
elements = GetLayoutAsXmlElements(context, layoutResourceId);
}
/* If there is at least one 'Binding' attribute set in the XML file,
* get the view as objects. */
if (elements != null && elements.Any(xe => xe.Attribute(bindingXmlNamespace) != null))
{
views = GetAllChildrenInView(view);
}
if (elements != null && elements.Any() && views != null && views.Any())
{
/* Get all the binding inside the XML file. */
var bindingInfos = ExtractBindingsFromLayoutFile(elements, views);
if (bindingInfos == null || !bindingInfos.Any())
{
return;
}
/* Load all the converters if there is a binding using a converter. */
if (bindingInfos.Any(bo => !string.IsNullOrWhiteSpace(bo.Converter)))
{
if (valueConverterTypes == null)
{
valueConverterTypes = new List <Type>();
var converters = TypeUtility.GetTypes <IValueConverter>();
valueConverterTypes.AddRange(converters);
}
}
var binder = new BindingApplicator();
foreach (var bindingInfo in bindingInfos)
{
IValueConverter valueConverter = null;
string valueConverterName = bindingInfo.Converter;
if (!string.IsNullOrWhiteSpace(valueConverterName))
{
var converterType = valueConverterTypes.FirstOrDefault(t => t.Name == valueConverterName);
if (converterType != null)
{
var constructor = converterType.GetConstructor(Type.EmptyTypes);
if (constructor != null)
{
valueConverter = constructor.Invoke(null) as IValueConverter;
}
else
{
throw new InvalidOperationException(
$"Value converter {valueConverterName} needs "
+ "an empty constructor to be instanciated.");
}
}
else
{
throw new InvalidOperationException(
$"There is no converter named {valueConverterName}.");
}
}
binder.ApplyBinding(bindingInfo, dataContext, valueConverter, unbindActions);
}
}
}
