protected override void Dispose(bool disposing) { if (_disposed) { return; } _disposed = true; if (disposing) { _shellContext.Shell.PropertyChanged -= OnShellPropertyChanged; if (_flyoutHeader != null) { _flyoutHeader.MeasureInvalidated -= OnFlyoutHeaderMeasureInvalidated; } if (_appBar != null) { _appBar.RemoveOnOffsetChangedListener(this); _appBar.RemoveView(_headerView); } if (_recycler != null) { _recycler.SetLayoutManager(null); _recycler.SetAdapter(null); _recycler.Dispose(); } _adapter?.Dispose(); _headerView.Dispose(); _rootView.Dispose(); _layoutManager?.Dispose(); _defaultBackgroundColor?.Dispose(); _bgImage?.Dispose(); _flyoutHeader = null; _rootView = null; _headerView = null; _shellContext = null; _appBar = null; _recycler = null; _adapter = null; _defaultBackgroundColor = null; _layoutManager = null; _bgImage = null; } base.Dispose(disposing); }
protected virtual void LoadView(IShellContext shellContext) { Profile.FrameBegin(); var context = shellContext.AndroidContext; // Android designer can't load fragments or resources from layouts if (context.IsDesignerContext()) { _rootView = new FrameLayout(context); return; } var coordinator = LayoutInflater.FromContext(context).Inflate(Resource.Layout.FlyoutContent, null); Profile.FramePartition("Find Recycler"); _recycler = coordinator.FindViewById <RecyclerView>(Resource.Id.flyoutcontent_recycler); Profile.FramePartition("Find AppBar"); _appBar = coordinator.FindViewById <AppBarLayout>(Resource.Id.flyoutcontent_appbar); _rootView = coordinator as ViewGroup; Profile.FramePartition("Add Listener"); _appBar.AddOnOffsetChangedListener(this); Profile.FramePartition("Add HeaderView"); _actionBarHeight = (int)context.ToPixels(56); UpdateFlyoutHeader(); Profile.FramePartition("Recycler.SetAdapter"); _adapter = new ShellFlyoutRecyclerAdapter(shellContext, OnElementSelected); _recycler.SetClipToPadding(false); _recycler.SetLayoutManager(_layoutManager = new ScrollLayoutManager(context, (int)Orientation.Vertical, false)); _recycler.SetLayoutManager(new LinearLayoutManager(context, (int)Orientation.Vertical, false)); _recycler.SetAdapter(_adapter); Profile.FramePartition("Initialize BgImage"); var metrics = context.Resources.DisplayMetrics; var width = Math.Min(metrics.WidthPixels, metrics.HeightPixels); using (TypedValue tv = new TypedValue()) { if (context.Theme.ResolveAttribute(global::Android.Resource.Attribute.ActionBarSize, tv, true)) { _actionBarHeight = TypedValue.ComplexToDimensionPixelSize(tv.Data, metrics); } } width -= _actionBarHeight; coordinator.LayoutParameters = new LP(width, LP.MatchParent); _bgImage = new ImageView(context) { LayoutParameters = new LP(coordinator.LayoutParameters) }; Profile.FramePartition("UpdateFlyoutHeaderBehavior"); UpdateFlyoutHeaderBehavior(); _shellContext.Shell.PropertyChanged += OnShellPropertyChanged; Profile.FramePartition("UpdateFlyoutBackground"); UpdateFlyoutBackground(); Profile.FramePartition(nameof(UpdateVerticalScrollMode)); UpdateVerticalScrollMode(); Profile.FrameEnd(); }