private void nav_NavigationItemSelected(object sender, NavigationEventArgs args)
{
var containerResId = Resource.Id.fragment_container;
var transaction = SupportFragmentManager.BeginTransaction();
transaction.SetTransition((int)SupportFragmentTransaction.TransitFragmentOpen);
if (args.NavItemPosition == NavigationDestination.List)
{
list_fragment = list_fragment ?? new SampleListFragment();
list_fragment.FastScrollEnabled = false;
transaction.Replace(containerResId, list_fragment);
}
else if (args.NavItemPosition == NavigationDestination.Grid)
{
grid_fragment = grid_fragment ?? new GridFragment();
transaction.Replace(containerResId, grid_fragment);
}
else if (args.NavItemPosition == NavigationDestination.ScrollView)
{
image_fragment = new ImageFragment(Resource.Drawable.android_flavors);
transaction.Replace(containerResId, image_fragment);
}
else if (args.NavItemPosition == NavigationDestination.ListFastScroll)
{
list_fragment = list_fragment ?? new SampleListFragment();
list_fragment.FastScrollEnabled = true;
transaction.Replace(containerResId, list_fragment);
}
transaction.AddToBackStack(null);
transaction.Commit();
}
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
SetContentView(Resource.Layout.main_layout);
is_dual_pane = Resources.GetBoolean(Resource.Boolean.has_two_panes);
var fm = SupportFragmentManager;
var transaction = fm.BeginTransaction();
nav = new NavFragment();
if (is_dual_pane)
{
grid_fragment = new GridFragment();
current_nav_position = 0;
transaction.Replace(Resource.Id.nav_fragment_container, nav);
transaction.Replace(Resource.Id.content_fragment_container, grid_fragment);
}
else
{
transaction.Replace(Resource.Id.fragment_container, nav);
}
transaction.Commit();
nav.NavigationItemActivated += nav_NavigationItemSelected;
// start our master service
// We could alternatively start this from our Application class
var intent = new Intent(this, typeof(MasterService));
StartService(intent);
}
private void nav_NavigationItemSelected(object sender, NavigationEventArgs args)
{
var didChange = false;
var addToBackStack = false;
if (current_nav_position != args.NavItemPosition)
{
current_nav_position = args.NavItemPosition;
didChange = true;
}
var containerResId = 0;
var transitionType = FragmentTransit.None;
if (didChange || !is_dual_pane)
{
if (is_dual_pane)
{
transitionType = FragmentTransit.FragmentFade;
containerResId = Resource.Id.content_fragment_container;
}
else
{
transitionType = FragmentTransit.FragmentOpen;
addToBackStack = true;
containerResId = Resource.Id.fragment_container;
}
var transaction = SupportFragmentManager.BeginTransaction();
transaction.SetTransition((int)transitionType);
if (current_nav_position == 0)
{
grid_fragment = grid_fragment ?? new GridFragment();
transaction.Replace(containerResId, grid_fragment);
}
else if (current_nav_position == 1)
{
image_fragment = new ImageFragment(Resource.Drawable.android_flavors);
transaction.Replace(containerResId, image_fragment);
}
else if (current_nav_position == 2)
{
image_fragment = new ImageFragment(Resource.Drawable.xamarin);
transaction.Replace(containerResId, image_fragment);
}
if (addToBackStack)
{
transaction.AddToBackStack(null);
}
transaction.Commit();
}
}
