У меня есть представление списка, в котором есть заголовок шаблона, и каждая строка представляет собой пользовательский элемент управления, который отображает представление переработчика для Android.
Иногда, когда я обновляю наблюдаемую коллекцию, к которой привязан список, я получаю следующее
09-26 09: 58: 12.759 F / (19698): * Утверждение в / Users / builder / data / lanes / 6090 / 86d33f45 / source / monodroid / external / xamarin-android / external /mono / mono / metadata / sgen-tarjan-bridge.c: 1140, условие xref_count == xref_index' not met
09-26 09:58:12.764 F/libc (19698): Fatal signal 6 (SIGABRT), code -6 in tid 19822 (Thread Pool Wor), pid 19698 (houseofcode.Mir)
09-26 09:58:12.914 I/crash_dump32(20062): obtaining output fd from tombstoned, type: kDebuggerdTombstone
09-26 09:58:12.916 I//system/bin/tombstoned( 1483): received crash request for pid 19698
09-26 09:58:12.920 I/crash_dump32(20062): performing dump of process 19698 (target tid = 19822)
09-26 09:58:12.922 F/DEBUG (20062): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
09-26 09:58:12.922 F/DEBUG (20062): Build fingerprint: 'google/sdk_gphone_x86/generic_x86:8.1.0/OSM1.180201.007/4586646:user/release-keys'
09-26 09:58:12.922 F/DEBUG (20062): Revision: '0'
09-26 09:58:12.922 F/DEBUG (20062): ABI: 'x86'
09-26 09:58:12.922 F/DEBUG (20062): pid: 19698, tid: 19822, name: Thread Pool Wor >>> io.houseofcode.Mir <<<
09-26 09:58:12.922 F/DEBUG (20062): signal 6 (SIGABRT), code -6 (SI_TKILL), fault addr --------
09-26 09:58:12.923 F/DEBUG (20062): Abort message: '* Assertion at /Users/builder/data/lanes/6090/86d33f45/source/monodroid/external/xamarin-android/external/mono/mono/metadata/sgen-tarjan-bridge.c:1140, condition xref_count == xref_index 'не выполнено 09-26 09: 58: 12.923 F / DEBUG (20062):' 09-26 09:58:12.923 F / DEBUG (20062): eax 00000000 ebx 00004cf2 ecx 00004d6e edx 00000006 09-26 09: 58: 12.923 F / DEBUG (20062): esi 00000000 edi 00004cf2 09-26 09: 58: 12.923 F / DEBUG (20062):xcs 00000073 xds 0000007b xes 0000007b xfs 0000003b xss 0000007b 09-26 09: 58: 12.923 F / DEBUG (20062): eip b040dac4 ebp 00000000 esp 7d0fdd28 flags 00200286 09-26 09: 58: 12.926 F / DEBUG (20062): 09-26 09: 58: 12.926 F / DEBUG (20062): обратная трасса: 09-26 09: 58: 12.926 F / DEBUG (20062): # 00 pc 00000ac4 [vdso: b040d000] (__kernel_vsyscall + 16) 09-26 09: 58: 12.926 F / DEBUG (20062): # 01 pc 0001edf8 /system/lib/libc.so (syscall + 40) 09-26 09:58:12.926 F / DEBUG (20062): # 02 pc 0001f073 /system/lib/libc.so (abort + 115) 09-26 09: 58: 12.926 F / DEBUG (20062): # 03 pc 00295345 / data / app / Mono.Android.DebugRuntime-FonMYGn1d4jnoxtVxgxnRg == / lib / x86 / libmonosgen-32bit-2.0.so 09-26 09: 58: 13.547 W / zygote (1593): ошибка kill (-14436, 9): нет такого процесса 09-2609: 58: 13.547 I / zygote (1593): успешно убит идентификатор процесса cgroup uid 10053 pid 14436 в 1 мс 09-26 09: 58: 13.549 I / ActivityManager (1593): процесс com.google.android.apps.docs (pid 14436)) умер: cch + 6CEM 09-26 09: 58: 13.684 W / Looper (1593): отправка заняла 112 мс на android.ui, h = обработчик (com.android.server.am.ActivityManagerService $ UiHandler) {d9bb478} cb= null msg = 53 09-26 09: 58: 13.853 E // system / bin / tombstoned (1483): Tombstone записывается в: / data / tombstones / tombstone_00 09-26 09: 58: 13.883 I / BootReceiver (1593):Копирование / данные / надгробия / надгробие_00 в DropBox (SYSTEM_TOMBSTONE) 09-26 09: 58: 13.914 W / ActivityManager (1593): принудительно завершить действие io.houseofcode.Mir / md558c489633a57fe94a7e603acc8e0c63b.MainActivity 09-26 09: 58: 13.973 W / InputDispatcher (1593): 1593).houseofcode.Mir / md558c489633a57fe94a7e603acc8e0c63b.MainActivity (server) '~ Потребитель закрыл входной канал или произошла ошибка.events = 0xd 09-26 09: 58: 13.973 E / InputDispatcher (1593): канал '81391ff io.houseofcode.Mir / md558c489633a57fe94a7e603acc8e0c63b.MainActivity (server)' ~ Канал неисправим и сломан!09-26 09: 58: 13.981 I / Zygote (1466): процесс 19698 завершен из-за сигнала (6) 09-26 09: 58: 13.992 I / WindowManager (1593): WIN DEATH: Window {81391ff u0 io.houseofcode.Mir / md558c489633a57fe94a7e603acc8e0c63b.MainActivity} 09-26 09: 58: 13.992 W / InputDispatcher (1593): предпринята попытка отменить регистрацию уже незарегистрированного входного канала '81391ff io.houseofcode.Mir / md558c4896330aeeejb0688e63b8a6 (095) 095: 563e63b87014.005 W / ActivityManager (1593): исключение, генерируемое во время паузы 09-26 09: 58: 14.005 W / ActivityManager (1593): android.os.DeadObjectException 09-26 09: 58: 14.005 W / ActivityManager (1593): на андроиде.os.BinderProxy.transactNative (собственный метод) 09-26 09: 58: 14.005 W / ActivityManager (1593): на android.os.BinderProxy.transact (Binder.java:764) 09-26 09: 58: 14.005 W / ActivityManager(1593): в android.app.IApplicationThread $ Stub $ Proxy.schedulePauseActivity (IApplicationThread.java:1079) 09-26 09: 58: 14.005 W / ActivityManager (1593): в com.android.server.am.ActivityStack.startPausingLocked (ActivityStack.java:1347) 09-26 09: 58: 14.005 W / ActivityManager (1593): на com.android.server.am.ActivityStack.finishActivityLocked (ActivityStack.java:3779)09-26 09: 58: 14.005 W / ActivityManager (1593): на com.android.server.am.ActivityStack.finishActivityLocked (ActivityStack.java:3721) 09-26 09: 58: 14.005 W / ActivityManager (1593): вcom.android.server.am.ActivityStack.finishTopRunningActivityLocked (ActivityStack.java:3602) 09-26 09: 58: 14.005 W / ActivityManager (1593): по адресу com.android.server.am.ActivityStackSupervisor.finishTopRunningActivityLocked (ActivityStacker.jscked: ActivityStacker_j2124) 09-26 09: 58: 14.005 W / ActivityManager (1593): на com.android.server.am.AppErrors.handleAppCrashLocked (AppErrors.java:668) 09-26 09: 58: 14.005 W / ActivityManager (1593): в com.android.server.am.AppErrors.makeAppCrashingLocked (AppErrors.java:500) 09-26 09: 58: 14.005 W / ActivityManager (1593): в com.android.server.am.AppErrors.crashApplicationInner (AppErrors.Java: 376) 09-26 09: 58: 14.005 W / ActivityManager (1593): at com.android.server.am.AppErrors.crashApplication (AppErrors.java:321) 09-26 09: 58: 14.005 W / ActivityManager (1593): на com.android.server.am.ActivityManagerSerVice.handleApplicationCrashInner (ActivityManagerService.java:14375) 09-26 09: 58: 14.005 W / ActivityManager (1593): в com.android.server.am.NativeCrashListener $ NativeCrashReporter.run (NativeCrashListener.java:85) 09-26: 58: 14.015 D / ConnectivityService (1593): Служба ConnectivityService NetworkRequestInfo): Ошибка открытия / proc / 19698 / oom_score_adj;errno = 2 09-26 09: 58: 14.067 I / ActivityManager (1593): процесс io.houseofcode.Mir (pid 19698) умер: vis + 99TOP 09-26 09: 58: 14.069 W / zygote (1593): убить(-19698, 9) сбой: такой процесс отсутствует 09-26 09: 58: 14.069 I / zygote (1593): успешно уничтоженный процесс cgroup uid 10108 pid 19698 за 1 мс 09-26 09: 58: 14.100 D / gralloc_ranchu (1395): gralloc_alloc: создание области пепла размером 8298496 09-26 09: 58: 14.108 W / ActivityManager (1593): setHasOverlayUi вызвал неизвестный pid: 19698 09-26 09: 58: 14.130 I / ActivityManager (1593): отображение диалогового окна сбоя дляпакет io.houseofcode.Mir u0
это мой список просмотра
<ListView x:Name="lstVideos" SeparatorVisibility="None" ItemsSource="{Binding Videos}" HasUnevenRows="true">
<ListView.Header>
<Grid x:Name="vwFeatured" VerticalOptions="StartAndExpand" HeightRequest="180">
<Grid.GestureRecognizers>
<TapGestureRecognizer Command="{Binding ShowVideoCommand}" CommandParameter="{Binding FeaturedVideo}"></TapGestureRecognizer>
</Grid.GestureRecognizers>
<Image x:Name="imgFeatured" BackgroundColor="DimGray" Aspect="Fill" Source="{Binding FeaturedVideo.Thumbnail}"
VerticalOptions="FillAndExpand" HorizontalOptions="FillAndExpand">
</Image>
<Image Source="Play" IsVisible="{Binding FeaturedVideo.FullyDownloaded}" VerticalOptions="Center" HorizontalOptions="Center">
</Image>
<Label Text="Loading..." FontSize="Medium" TextColor="White" IsVisible="{Binding FeaturedVideo.FullyDownloaded, Converter={StaticResource InverseBoolConverter}}"
VerticalOptions="Center" HorizontalOptions="Center"></Label>
</Grid>
</ListView.Header>
<ListView.ItemTemplate>
<DataTemplate>
<controls2:TransparentCell>
<StackLayout Margin="0, 10">
<StackLayout HorizontalOptions="Fill" Orientation="Horizontal">
<Label Text="{Binding SectionName}" VerticalOptions="Fill" VerticalTextAlignment="Center" HorizontalOptions="Start" Style="{StaticResource SectionHeaderStyle}" Margin="10,10">
</Label>
<Label Text="{Binding VideoCount, StringFormat='{0:D} videos'}" VerticalTextAlignment="Center" VerticalOptions="Fill" HorizontalOptions="EndAndExpand" Style="{StaticResource VideoCountStyle}" Margin="10,10">
</Label>
</StackLayout>
<controls:XfGridView x:Name="vwVideos" ItemsSource="{Binding VideoData}" Orientation="Horizontal" ItemTemplate="{StaticResource videoTemplate}"
ColumnSpacing="15" RowSpacing="5" ItemWidth="145" ItemHeight="120">
</controls:XfGridView>
</StackLayout>
</controls2:TransparentCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
и это мой пользовательский рендерер
public class XfGridRenderer : ViewRenderer<XfGridView, RecyclerView>
{
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
if (Element.ItemsSource != null)
{
int count = 0;
foreach (var item in Element.ItemsSource)
count++;
}
var recyclerView = new RecyclerView(Context);
int orientation = (Element.Orientation == Controls.GridOrientation.Horizontal) ? OrientationHelper.Horizontal : OrientationHelper.Vertical;
recyclerView.SetLayoutManager(new GridLayoutManager(Context, Element.NoOfColumns, orientation, false));
recyclerView.AddItemDecoration(new RecyclerItemDecoration((int)Element.RowSpacing, (int)Element.ColumnSpacing, (int)Element.NoOfColumns, orientation));
SetNativeControl(recyclerView);
var adapter = new RecycleViewAdapter(Element);
Control.SetAdapter(adapter);
}
protected override void OnElementChanged(ElementChangedEventArgs<XfGridView> e)
{
base.OnElementChanged(e);
if ((Element.Orientation == Controls.GridOrientation.Vertical))
Element.WidthRequest = Element.NoOfColumns * Element.ItemWidth;
else
Element.HeightRequest = Element.NoOfColumns * Element.ItemHeight;
}
}
public class RecycleViewAdapter : RecyclerView.Adapter
{
private readonly XfGridView _view;
private readonly IList _dataSource;
public override int ItemCount => (_dataSource != null ? _dataSource.Count : 0);
public override long GetItemId(int position)
{
return position;
}
public RecycleViewAdapter(XfGridView view)
{
_view = view;
_dataSource = view.ItemsSource?.Cast<object>()?.ToList();
HasStableIds = true;
}
public override void OnBindViewHolder(RecyclerView.ViewHolder holder, int position)
{
var item = (RecycleViewHolder)holder;
var dataContext = _dataSource[position];
item.SetBindingItems(dataContext, _view);
}
public override void OnViewAttachedToWindow(Java.Lang.Object holder)
{
base.OnViewAttachedToWindow(holder);
var item = (RecycleViewHolder)holder;
item.UpdateUi();
}
public override RecyclerView.ViewHolder OnCreateViewHolder(ViewGroup parent, int viewType)
{
var contentFrame = new FrameLayout(parent.Context)
{
LayoutParameters = new FrameLayout.LayoutParams(ViewGroup.LayoutParams.WrapContent,
ViewGroup.LayoutParams.WrapContent)
{
Height = (int)(_view.ItemHeight * Resources.System.DisplayMetrics.Density),
Width = (int)(_view.ItemWidth * Resources.System.DisplayMetrics.Density)
}
};
contentFrame.DescendantFocusability = DescendantFocusability.BeforeDescendants;
var viewHolder = new RecycleViewHolder(contentFrame);
return viewHolder;
}
}
public class RecycleViewHolder : RecyclerView.ViewHolder
{
private ViewCell _viewCell;
private object _dataContext;
private XfGridView _view;
public RecycleViewHolder(Android.Views.View itemView) : base(itemView)
{
ItemView = itemView;
}
public void SetBindingItems(object dataContext, XfGridView view)
{
_dataContext = dataContext;
_view = view;
}
public void UpdateUi()
{
if (_dataContext != null)
{
var dataTemplate = _view.ItemTemplate;
var selector = dataTemplate as DataTemplateSelector;
if (selector != null)
{
var template = selector.SelectTemplate(_dataContext, _view.Parent);
_viewCell = template.CreateContent() as ViewCell;
}
else
{
_viewCell = dataTemplate?.CreateContent() as ViewCell;
}
}
var contentLayout = (FrameLayout)ItemView;
_viewCell.BindingContext = _dataContext;
_viewCell.Parent = _view;
var metrics = Resources.System.DisplayMetrics;
var height = (int)((_view.ItemWidth + _viewCell.View.Margin.Top + _viewCell.View.Margin.Bottom) * metrics.Density);
var width = (int)((_view.ItemWidth + _viewCell.View.Margin.Left + _viewCell.View.Margin.Right) * metrics.Density);
_viewCell.View.Layout(new Rectangle(0, 0, _view.ItemWidth, _view.ItemHeight));
var layoutParams = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WrapContent, ViewGroup.LayoutParams.WrapContent)
{
Height = height,
Width = width
};
if (Platform.GetRenderer(_viewCell.View) == null)
{
Platform.SetRenderer(_viewCell.View, Platform.CreateRenderer(_viewCell.View));
}
var renderer = Platform.GetRenderer(_viewCell.View);
var viewGroup = renderer.View;
viewGroup.LayoutParameters = layoutParams;
viewGroup.Layout(0, 0, (int)_view.ItemWidth, (int)_view.ItemHeight);
contentLayout.RemoveAllViews();
contentLayout.AddView(viewGroup);
}
}
public class RecyclerItemDecoration : RecyclerView.ItemDecoration
{
private int _rowSpacing;
private int _colSpacing;
private int _noOfColumns;
private int _orientation;
public RecyclerItemDecoration(int rowSpacing, int colSpacing, int colNo, int orientation)
{
_rowSpacing = (int)(rowSpacing * Resources.System.DisplayMetrics.Density);
_colSpacing = (int)(colSpacing * Resources.System.DisplayMetrics.Density);
_noOfColumns = colNo;
_orientation = orientation;
}
public override void GetItemOffsets(Rect outRect, Android.Views.View view, RecyclerView parent, RecyclerView.State state)
{
base.GetItemOffsets(outRect, view, parent, state);
outRect.Right = _colSpacing;
outRect.Bottom = _rowSpacing;
int position = parent.GetChildLayoutPosition(view);
if (_orientation == OrientationHelper.Vertical)
{
if (position < _noOfColumns)
{
outRect.Top = _rowSpacing;
}
else
{
outRect.Top = 0;
}
if ((position % _noOfColumns) == 0)
{
outRect.Left = _colSpacing;
}
else
{
outRect.Left = _colSpacing / 2;
}
}
else
{
if ((position % _noOfColumns) == 0)
{
outRect.Top = _rowSpacing;
}
else
{
outRect.Top = _rowSpacing / 2;
}
if (position < _noOfColumns)
{
outRect.Left = _colSpacing;
}
else
{
outRect.Left = 0;
}
}
}
}