public void OnTabSelected(ActionBar.Tab tab, FragmentTransaction ft)
{
if (_cleared)
{
return;
}
var bar = (ActionBar)tab.GetBindingMemberValue(AttachedMembers.Object.Parent);
var placeHolder = ActionBarView.GetTabContentId(bar);
var activity = bar.ThemedContext.GetActivity();
SetContent(tab, ft, placeHolder, activity, bar);
//Set selected item data context or tab
var selectedItem = bar.GetBindingMemberValue(ItemsSourceGeneratorBase.MemberDescriptor) == null ? tab : tab.DataContext();
#if APPCOMPAT
bar.SetBindingMemberValue(AttachedMembersCompat.ActionBar.SelectedItem, selectedItem);
#else
bar.SetBindingMemberValue(AttachedMembers.ActionBar.SelectedItem, selectedItem);
#endif
}
private void SetContent(ActionBar.Tab tab, FragmentTransaction ft, int?placeHolder, Activity activity, ActionBar bar)
{
if (placeHolder == null)
{
Tracer.Error("The placeholder for tab {0} was not found.", tab);
return;
}
var layout = activity.FindViewById <ViewGroup>(placeHolder.Value);
if (layout == null)
{
Tracer.Warn("The ActionBarTabContentId with id = {0} is not found in activity {1}",
placeHolder.Value,
activity);
return;
}
if (_content == null)
{
#if APPCOMPAT
_content = tab.GetBindingMemberValue(AttachedMembersCompat.ActionBarTab.Content);
#else
_content = tab.GetBindingMemberValue(AttachedMembers.ActionBarTab.Content);
#endif
var viewModel = _content as IViewModel;
if (viewModel == null)
{
var fragmentClass = _content as string;
//If content is a string, trying to create a fragment.
if (!string.IsNullOrEmpty(fragmentClass))
{
var type = TypeCache <Fragment> .Instance.GetTypeByName(fragmentClass, true, false);
if (type != null)
{
var fragment = Fragment.Instantiate(bar.ThemedContext, Java.Lang.Class.FromType(type).Name);
_content = fragment;
}
}
else if (_content is int)
{
_content = activity.GetBindableLayoutInflater().Inflate((int)_content, null);
}
}
else
{
viewModel.Settings.Metadata.AddOrUpdate(ViewModelConstants.StateNotNeeded, true);
}
_content = PlatformExtensions.GetContentView(layout, layout.Context, _content,
_contentTemplateProvider.GetTemplateId(), _contentTemplateProvider.GetDataTemplateSelector());
if (BindingServiceProvider.BindingManager.GetBindings(tab, AttachedMembers.Object.DataContext).Any())
{
_content.SetBindingMemberValue(AttachedMembers.Object.Parent, tab);
}
layout.SetContentView(_content, ft, (@group, fragment, arg3) =>
{
if (fragment.IsDetached)
{
arg3.Attach(fragment);
}
else
{
arg3.Replace(@group.Id, fragment);
}
});
}
else
{
layout.SetContentView(_content, ft, (@group, fragment, arg3) => arg3.Attach(fragment));
}
}