Xamarin Forms ScrollView打破了应用程序

时间：2018-04-13 09:37:26

标签： xaml xamarin.forms scrollview

我正在尝试将我的XAML页面包装在滚动视图中，页面在它自己的工作正常（android 4.4到8）但是当我介绍滚动时，我一遍又一遍地得到以下错误设备日志：

Time    Device Name Type    PID Tag Message
04-13 10:20:07.633  Samsung SM-T230 Error   144 BufferQueue [com.glmobileapp/md5dc496626c370b103ce86ee6c362b5772.MainActivity] dequeueBuffer: min undequeued buffer count (1) exceeded (dequeued=2 undequeudCount=0)

以及输出窗口中的以下内容：

04-13 10:27:10.966 D/skia    ( 1117): --- allocation failed for scaled bitmap
04-13 10:27:11.026 I/dalvikvm-heap( 1117): Clamp target GC heap from 516.602MB to 512.000MB
04-13 10:27:11.026 D/dalvikvm( 1117): GC_FOR_ALLOC freed <1K, 1% free 511501K/513364K, paused 52ms, total 52ms
04-13 10:27:11.026 I/dalvikvm-heap( 1117): Forcing collection of SoftReferences for 22473160-byte allocation
04-13 10:27:11.076 I/dalvikvm-heap( 1117): Clamp target GC heap from 516.602MB to 512.000MB
04-13 10:27:11.076 D/dalvikvm( 1117): GC_BEFORE_OOM freed <1K, 1% free 511500K/513364K, paused 56ms, total 56ms
04-13 10:27:11.076 E/dalvikvm-heap( 1117): Out of memory on a 22473160-byte allocation.
04-13 10:27:11.076 I/dalvikvm( 1117): "Thread-7288" prio=10 tid=15 RUNNABLE
04-13 10:27:11.076 I/dalvikvm( 1117):   | group="main" sCount=0 dsCount=0 obj=0x41e27160 self=0x815faa88
04-13 10:27:11.076 I/dalvikvm( 1117):   | sysTid=1176 nice=-11 sched=0/0 cgrp=apps handle=-2103463040
04-13 10:27:11.076 I/dalvikvm( 1117):   | state=R schedstat=( 4785797128 1283386243 1816 ) utm=437 stm=41 core=3
04-13 10:27:11.076 I/dalvikvm( 1117):   at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
04-13 10:27:11.076 I/dalvikvm( 1117):   at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:683)
04-13 10:27:11.076 I/dalvikvm( 1117):   at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:513)
04-13 10:27:11.076 I/dalvikvm( 1117):   at android.graphics.BitmapFactory.decodeResource(BitmapFactory.java:541)
04-13 10:27:11.076 I/dalvikvm( 1117):   at android.graphics.BitmapFactory.decodeResource(BitmapFactory.java:571)
04-13 10:27:11.076 I/dalvikvm( 1117):   at dalvik.system.NativeStart.run(Native Method)

我看到缩放的位图＆＃39;提到，我只有一个大png。 知道如何进行调试/修复吗？

更新：

我用ffimageloading替换了图像：CachedImage，它不再破坏应用程序，但它现在显示一个空白屏幕

XAML：

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="gl_mobile_app.Views.Article.ArticlePage"
             xmlns:artina="clr-namespace:UXDivers.Artina.Shared;assembly=UXDivers.Artina.Shared"
             xmlns:local="clr-namespace:gl_mobile_app.Views.Templates;assembly=gl_mobile_app"
             xmlns:ratio="clr-namespace:gl_mobile_app;assembly=gl_mobile_app"
             xmlns:custom="clr-namespace:gl_mobile_app.Controls;assembly=gl_mobile_app"
             xmlns:ffimageloading="clr-namespace:FFImageLoading.Forms;assembly=FFImageLoading.Forms"
              >
    <ContentPage.ToolbarItems>
        <ToolbarItem Text="Back" Clicked="GoBack" />
    </ContentPage.ToolbarItems>

    <ContentPage.Content>
        <ScrollView>
            <Grid BackgroundColor="#ede8db" x:Name="articleGrid" Padding="0,0,0,0" >

                <Grid.RowDefinitions>
                    <RowDefinition Height="47.5*" x:Name="grdRow0" />
                    <RowDefinition Height="5*" x:Name="grdRow1"/>
                    <RowDefinition Height="47.5*" x:Name="grdRow2" />
                </Grid.RowDefinitions>
                <ratio:ContentRatioContainer Grid.Row="0" x:Name="imgContainer" >
                    <ffimageloading:CachedImage Aspect="AspectFill" Source="KevingroveCarouselImg.png" AbsoluteLayout.LayoutBounds="1,1,1,1" AbsoluteLayout.LayoutFlags="All" x:Name="bigImg" 
                            HeightRequest="{artina:OnOrientationDouble PortraitPhone=880, LandscapePhone=125, PortraitTablet=600, LandscapeTablet=400 }" Grid.Row="0"/>
                </ratio:ContentRatioContainer>
                <artina:Button Margin="10,10,10,10" x:Name="ImgZoom" Clicked="EnlargeImage" HorizontalOptions="End" VerticalOptions="Start" Image="IncreaseImageIcon.png" BackgroundColor="Transparent"  HeightRequest="30" WidthRequest="30"/>

                <StackLayout Grid.Row="1" Orientation="Horizontal" BackgroundColor="#ede8db" Margin="0" Padding="30,0,30,0" x:Name="iconStack" HorizontalOptions="FillAndExpand" >
                    <Label HorizontalTextAlignment="Center" Text="{x:Static ratio:Ingeniuus.TOILET}" Style="{StaticResource Ingeniuus}" TextColor="Black" FontSize ="{artina:OnOrientationDouble PortraitPhone=25, LandscapePhone=18, PortraitTablet=30, LandscapeTablet=20 }" />
                    <Label HorizontalTextAlignment="Center" Text="{x:Static ratio:Ingeniuus.WHEELCHAIR}" Style="{StaticResource Ingeniuus}" TextColor="Black" FontSize ="{artina:OnOrientationDouble PortraitPhone=25, LandscapePhone=18, PortraitTablet=30, LandscapeTablet=20 }" />
                    <Label x:Name="expand" HorizontalTextAlignment="Center" HorizontalOptions="EndAndExpand" Text="{x:Static ratio:FontAwesome.ARROW_DOWN}" Style="{StaticResource FontIcon}" TextColor="Black" FontSize="{artina:OnOrientationDouble PortraitPhone=25, LandscapePhone=18, PortraitTablet=30, LandscapeTablet=20 }" />
                </StackLayout>

                    <StackLayout x:Name="TopLayout" Padding="30,0,30,0" BackgroundColor="Green">

                        <StackLayout Orientation="Horizontal" x:Name="MapMarker" Opacity="0.0">
                            <Label HorizontalTextAlignment="Center" Text="{x:Static ratio:Ingeniuus.MAP_MARKER}" Style="{StaticResource Ingeniuus}" TextColor="Black" FontSize="30" WidthRequest="{artina:OnOrientationDouble PortraitPhone=30,PortraitTablet=50, LandscapeTablet=50 }" />
                            <Label Text="Address" VerticalOptions="Center" HorizontalOptions="StartAndExpand" FontAttributes="Bold"  />
                        </StackLayout>

                        <StackLayout x:Name="AddressStack" >
                            <StackLayout.Padding>
                                <OnIdiom x:TypeArguments="Thickness">
                                    <OnIdiom.Phone>
                                        <OnPlatform x:TypeArguments="Thickness" iOS="34.5,0,0,0" Android="34.5,0,0,0" />
                                    </OnIdiom.Phone>
                                    <OnIdiom.Tablet>
                                        <OnPlatform x:TypeArguments="Thickness" iOS="54.5,0,0,0" Android="54.5,0,0,0" />
                                    </OnIdiom.Tablet>
                                </OnIdiom>
                            </StackLayout.Padding>
                            <Label x:Name="AddressLabel" >
                                <Label.FontFamily>
                                    <OnPlatform x:TypeArguments="x:String">
                                        <On Platform="iOS" Value="HelveticaNeue-Roman" />
                                        <On Platform="Android" Value="HelveticaNeue-Roman.otf#HelveticaNeue-Roman" />
                                    </OnPlatform>
                                </Label.FontFamily>
                            </Label>
                        </StackLayout>
                        <StackLayout x:Name="Empty1" HeightRequest="10" />

                        <StackLayout Orientation="Horizontal" x:Name="clock" Opacity="0.0">
                            <Label HorizontalTextAlignment="Center" Text="{x:Static ratio:Ingeniuus.CLOCK}" Style="{StaticResource Ingeniuus}" TextColor="Black" FontSize="30" WidthRequest="{artina:OnOrientationDouble PortraitPhone=30,PortraitTablet=50, LandscapeTablet=50 }"/>
                            <Label Text="Opening Times" VerticalOptions="Center" HorizontalOptions="StartAndExpand"  FontAttributes="Bold"/>
                        </StackLayout>

                        <StackLayout x:Name="OpeningTimesStack">
                            <StackLayout.Padding>
                                <OnIdiom x:TypeArguments="Thickness">
                                    <OnIdiom.Phone>
                                        <OnPlatform x:TypeArguments="Thickness" iOS="34.5,0,0,0" Android="34.5,0,0,0" />
                                    </OnIdiom.Phone>
                                    <OnIdiom.Tablet>
                                        <OnPlatform x:TypeArguments="Thickness" iOS="54.5,0,0,0" Android="54.5,0,0,0" />
                                    </OnIdiom.Tablet>
                                </OnIdiom>
                            </StackLayout.Padding>
                            <Label Grid.Row="1" x:Name="OpeningTimesLabel" >
                                <Label.FontFamily>
                                    <OnPlatform x:TypeArguments="x:String">
                                        <On Platform="iOS" Value="HelveticaNeue-Roman" />
                                        <On Platform="Android" Value="HelveticaNeue-Roman.otf#HelveticaNeue-Roman" />
                                    </OnPlatform>
                                </Label.FontFamily>
                            </Label>
                        </StackLayout>
                        <StackLayout x:Name="Empty2" HeightRequest="10" />

                        <StackLayout x:Name="txt" Opacity="1.0">
                            <Label x:Name="header" Style="{ StaticResource HeaderStyle }" />
                            <Label x:Name="description" FontSize="Large" />
                        </StackLayout>

                        <ListView  x:Name="ArticleListView" CachingStrategy="RetainElement" HasUnevenRows="True" SeparatorVisibility="None" VerticalOptions="FillAndExpand" >
                            <ListView.ItemTemplate>
                                <DataTemplate>
                                    <ViewCell>
                                        <local:ArticleContentItemTemplate />
                                    </ViewCell>
                                </DataTemplate>
                            </ListView.ItemTemplate>
                        </ListView>
                    </StackLayout>
            </Grid>
        </ScrollView>
    </ContentPage.Content>
</ContentPage>

1 个答案:

答案 0 :(得分：0)

您需要优化png，验证尺寸，因为它已经提到

Clamp target GC heap from 516.602MB to 512.000MB

你应用了大量内存，因此设备无法为应用分配更多内存，这就是

的原因
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