/// <summary>
/// Add fragment specific menu items to the main toolbar
/// </summary>
/// <param name="menu"></param>
/// <param name="inflater"></param>
public override void OnCreateOptionsMenu(IMenu menu, MenuInflater inflater)
{
// Inflate the menu for this fragment
inflater.Inflate(Menu, menu);
// Show or hide the collapse icon
collapseItem = menu.FindItem(Resource.Id.action_collapse);
collapseItem?.SetVisible(expandedGroupCount > 0);
// If there is a filter selector then bind to it
FilterSelector?.BindToMenu(menu.FindItem(Resource.Id.filter));
// Bind the SortSelector
BaseModel.SortSelector.BindToMenu(menu.FindItem(Resource.Id.sort), Context, this);
}
/// <summary>
/// Called when the fragment is destroyed
/// Release any resources help by the fragment
/// </summary>
public sealed override void OnDestroyView()
{
FragmentView = null;
commandCallback.Callback = null;
FilterSelector?.BindToMenu(null);
// Turn off the timer
userInteractionTimer.Change(Timeout.Infinite, Timeout.Infinite);
// Some BaseModel resources
// Remove this object from the sort selector
BaseModel.SortSelector.Reporter = null;
// Save the scroll position
BaseModel.ListViewState = ListView.OnSaveInstanceState();
// Allow derived fragments to release their own resources
ReleaseResources();
base.OnDestroyView();
}