WebView Inside a ScrollView not working

November 9, 2019, 9:28 am

≫ Next: How to put two or more text in a same label?

≪ Previous: How to notify or call viewmodel 's method from customview 's bindable property

Hi,

I have a simple WebView inside a ScrollView but the problem it's not scrolling anything.

here is my code:

<ScrollView Grid.Row="0">
    <Grid Grid.Row="0" RowSpacing="0">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition Height="*" />
        </Grid.RowDefinitions>

        <SyncfusionRotator:SfRotator x:Name="RotatorAdDetails" Grid.Row="0" EnableLooping="False" EnableAutoPlay="False" NavigationDelay="4000" HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand">
            <SyncfusionRotator:SfRotator.HeightRequest>
                <OnIdiom x:TypeArguments="x:Double" Phone="300" Tablet="400" />
            </SyncfusionRotator:SfRotator.HeightRequest>
            <SyncfusionRotator:SfRotator.ItemTemplate>
                <DataTemplate>
                    <StackLayout ClassId="{Binding user_guid}">
                        <FFImageLoading:CachedImage Source="{Binding media_file}" ClassId="{Binding ad_guid}" LoadingPlaceholder="AdPlaceholder.png" FadeAnimationEnabled="True" HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand" Aspect="AspectFill" DownsampleToViewSize="true">
                        </FFImageLoading:CachedImage>
                    </StackLayout>
                </DataTemplate>
            </SyncfusionRotator:SfRotator.ItemTemplate>
        </SyncfusionRotator:SfRotator>

        <WebView x:Name="WebViewAdDetailsDescription" Grid.Row="1" Margin="5" HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand" />
    </Grid>
</ScrollView>

How can I fix that please?

Thanks,
Jassim

↧

How to put two or more text in a same label?

November 8, 2019, 7:53 am

≫ Next: Handle focus on entry in custom made autocomplete

≪ Previous: WebView Inside a ScrollView not working

I want to put in the same label something like this --> $ 300.56 where this symbol "$" its always a constant and just the number change with {Binding Price} for example. Can I do something like that? or just have to use to different labels, one for the symbol and the other for the price(??

↧

Handle focus on entry in custom made autocomplete

November 10, 2019, 6:50 am

≫ Next: EfganHuseynov

≪ Previous: How to put two or more text in a same label?

I have made a autocomplete control - but are not completely happy with how the unfocus of the entry happens

The actual autocomplete consists of a scrollview. Slow dragging inside the ScrollView works, but swipe/swipedragging more aggressively like you would do in a ListView - makes the Entry lose focus. The Autocomplete then closes as I have programmed it to be.

Is there some way I could manually handle the deselection of the entry when the user is interacting with the autocomplete (inside the scrollview)?

↧

EfganHuseynov

November 10, 2019, 3:39 am

≫ Next: Mono.AndroidTools.RequiresUninstallException: The installed package is incompatible.

≪ Previous: Handle focus on entry in custom made autocomplete

in 1st Xaml Page selected Picker item (Country) I want to Bind 3rd Xaml Page ...
Please help me!!

↧

Mono.AndroidTools.RequiresUninstallException: The installed package is incompatible.

November 10, 2019, 7:07 am

≫ Next: Xamarin.forms Firebase analystics.

≪ Previous: EfganHuseynov

When I change the target version from android 9 to 10, everything works fine deploying on a device hasn't got the previous version of the app but I have on my phone installed previous version and I am getting below error message.

/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(607,2): error ADB1000:  Deployment failed
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(607,2): error ADB1000: Mono.AndroidTools.RequiresUninstallException: The installed package is incompatible. Please manually uninstall and try again.
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(607,2): error ADB1000:   at Mono.AndroidTools.Internal.AdbOutputParsing.CheckInstallSuccess (System.String output, System.String packageName) [0x00136] in /Users/runner/runners/2.159.2/work/1/s/external/monodroid/tools/msbuild/external/androidtools/Mono.AndroidTools/Internal/AdbOutputParsing.cs:339 
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(607,2): error ADB1000:   at Mono.AndroidTools.AndroidDevice+<>c__DisplayClass95_0.<InstallPackage>b__0 (System.Threading.Tasks.Task`1[TResult] t) [0x00016] in /Users/runner/runners/2.159.2/work/1/s/external/monodroid/tools/msbuild/external/androidtools/Mono.AndroidTools/AndroidDevice.cs:753 
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(607,2): error ADB1000:   at System.Threading.Tasks.ContinuationTaskFromResultTask`1[TAntecedentResult].InnerInvoke () [0x00024] in <8786ba7ca96d408c8c0d5c5e15ea3164>:0 
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(607,2): error ADB1000:   at System.Threading.Tasks.Task.Execute () [0x00000] in /Users/builder/jenkins/workspace/build-package-osx-mono/2019-08/external/bockbuild/builds/mono-x64/external/corert/src/System.Private.CoreLib/src/System/Threading/Tasks/Task.cs:2319 
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.Debugging.targets(607,2): error ADB1000: --- End of stack trace from previous location where exception was thrown ---

anyone else seeing this error. it worries me if I make a new release on google play store and existing users will not able to update the app.
I found below report but I am not sure if that should be VS 2019 issue or Xamarin issue.

https://developercommunity.visualstudio.com/content/problem/790804/marjor-issue-on-new-builds.html

↧

Xamarin.forms Firebase analystics.

November 8, 2019, 12:39 am

≫ Next: What can I put into the blue area at top of app?

≪ Previous: Mono.AndroidTools.RequiresUninstallException: The installed package is incompatible.

I have implemented Firebase analytics tool in Xamarin.forms application, and i unable to create custom event

**public partial class FeedPage : ContentPage
{
IFirebaseAnalytics eventTracker;
public FeedPage()
{
InitializeComponent();
eventTracker = DependencyService.Get();
}

    void Handle_Clicked(object sender, System.EventArgs e)  
    {  
        eventTracker.SendEvent("Click1");   // Custom event 
    }  
}**

This custom event throw the error System.NullReferenceException: 'Object reference not set to an instance of an object.'

↧

What can I put into the blue area at top of app?

November 8, 2019, 7:43 pm

≫ Next: why navigation between pages in xamarin forms is slow on Android

≪ Previous: Xamarin.forms Firebase analystics.

There's a blue rectangle above my first control in my pages. My question is whether I can put things, for example a menu or picture. Also, what is this are called? Here, the Xaml for my opening page (the blue rectangle is above the label with the text "Welcome to Rodney Pix":

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:local="clr-namespace:TestXamarinFormsProject"

         x:Class="TestXamarinFormsProject.MainPage">

<ScrollView>
    <StackLayout  x:Name="sl" Orientation="Vertical">
        <Label Text="Welcome to Rodney Pix" HorizontalOptions="Center"
       VerticalTextAlignment="Start" VerticalOptions="Start"></Label>

        <ListView x:Name="lstDirectories" ItemTapped="LstDirectories_ItemTapped"
                  SelectedItem="{Binding SelectedListItem,Mode=TwoWay}">
            <ListView.ItemTemplate>
                <DataTemplate>
                    <ViewCell>

                        <StackLayout Padding="5" Orientation="Horizontal">
                            <Label Text="{Binding FriendlyDirectoryName}" TextColor="Black"/>
                        </StackLayout>

                    </ViewCell>
                </DataTemplate>
            </ListView.ItemTemplate>
        </ListView>

    </StackLayout>

</ScrollView>

↧

why navigation between pages in xamarin forms is slow on Android

November 6, 2019, 9:01 am

≫ Next: Can I have more than one ResourceDictionary?

≪ Previous: What can I put into the blue area at top of app?

in same code same project in xamarin forms
Navigation between pages is slow just on android on ios it is good
these video for IOS it is good speed
https://drive.google.com/open?id=162U0XmPw-NZvMZhqNgyDOtCPcy52EhHy
these for Android it slow not good like IOS
https://drive.google.com/open?id=15yedNiqzwypFx8RIN22UTltFmCSIIFIl
these my simple
https://drive.google.com/open?id=1eK-6efyw37LUH78p3ze-fflWXJI_3tlQ
thank you

↧

Can I have more than one ResourceDictionary?

November 10, 2019, 1:03 pm

≫ Next: CarouselPage: How to move to other page clicking on a button in the nav bar?

≪ Previous: why navigation between pages in xamarin forms is slow on Android

I have now one ResourceDictionary with all my styles for buttons, frames, labels.. etc.
but I want to have now two or more then I would choose one of then to use.

↧

CarouselPage: How to move to other page clicking on a button in the nav bar?

November 10, 2019, 1:14 pm

≫ Next: how do i make xamarin forms connect to a node js server on firebase hosting

≪ Previous: Can I have more than one ResourceDictionary?

this is my CarouselPage:

My first page

If I slide "Right to left"

Goes to my second page

I want to move from the first page to the second in the same way as now but also clicking on that button (shopping cart) and if I click it send me to the other. That's possible?

↧

how do i make xamarin forms connect to a node js server on firebase hosting

November 10, 2019, 1:19 pm

≫ Next: Get file path from content.

≪ Previous: CarouselPage: How to move to other page clicking on a button in the nav bar?

im making a cross platform ios and android app and have a node js backend with firebase hosting and saving information to firebase database. how do i connect the xamarin forms front end to the node js backend and make them communicate. i can save info from the clientside but its not secure and i can save info in node js but i need to take strings from clientside such as username and email. how do i do this securly such as using crypto?

↧

Get file path from content.

October 23, 2019, 11:59 am

≫ Next: Xamarin.Forms Events vs UWP Events

≪ Previous: how do i make xamarin forms connect to a node js server on firebase hosting

Hi everyone,

I have a Xamarin.Forms (iOS, Android) app and I open it as option to Open PDF documents. For Android app, I set an intent-filter with mimetype: pdf.

  <intent-filter>
          <action android:name="android.intent.action.VIEW" />
          <category android:name="android.intent.category.DEFAULT" />
          <data android:mimeType="application/pdf" />
        </intent-filter>

Is there any way to do the same thing on iOS?

And I have another problem. After I open my app, I want to retrieve the file's path from intent, but I get something like that:
content://com.android.providers.downloads.documents/document/22

Is there any way to get the file path from that content?

Thank you.

↧

Xamarin.Forms Events vs UWP Events

November 10, 2019, 1:41 pm

≫ Next: Shell MenuItem binding problem

≪ Previous: Get file path from content.

I am a UWP developer and am attempting to convert my apps to Xamarin.Forms for use by Android. I supposedly found enough of the XAML controls to make the UI, but the events are much more challenging. Is there anywhere that I can find a list with a comparison of UWP events & their suggested replacements in Xamarin.Forms? Some of the events that I have been told require the most rewriting for are the lifecycle (such as Page.Loaded). Are there pages anywhere with guidelines on portability for events? Thanks.

↧

Shell MenuItem binding problem

September 25, 2019, 11:59 am

≫ Next: Does Xamarin.Forms have a replacement for UWP's RoutedEventArgs?

≪ Previous: Xamarin.Forms Events vs UWP Events

Hi all.
My Label in Shell MenuItemTemplate can't see property from ViewModel (last item in XAML)

<?xml version="1.0" encoding="UTF-8"?>
<Shell xmlns="http://xamarin.com/schemas/2014/forms" 
       xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
       xmlns:d="http://xamarin.com/schemas/2014/forms/design"
       xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
       mc:Ignorable="d"
       xmlns:views="clr-namespace:BillingMobile.Views"
       xmlns:markupextensions="clr-namespace:BillingMobile.Xaml.MarkupExtensions"
       xmlns:materialIcons="clr-namespace:BillingMobile.Icons"
       xmlns:rounded="clr-namespace:BillingMobile.Controls.Rounded"
       Title="BillingMobile"
       x:Class="BillingMobile.AppShell"
       Style="{DynamicResource BaseStyle}">

    <FlyoutItem Title="Меню" FlyoutDisplayOptions="AsSingleItem" FlyoutIcon="wallet.png">
        <Tab Title="{markupextensions:TranslateExtension Wallet}" Icon="wallet.png">
            <ShellContent ContentTemplate="{DataTemplate views:AccountPage}" />
        </Tab>
        <Tab Title="{markupextensions:TranslateExtension MyCompany}" Icon="account_group.png">
            <ShellContent Title="{markupextensions:Translate Services}" ContentTemplate="{DataTemplate views:AccountPage}" />
            <ShellContent Title="{markupextensions:Translate Users}" ContentTemplate="{DataTemplate views:AccountPage}" />
            <ShellContent Title="{markupextensions:Translate Departments}" ContentTemplate="{DataTemplate views:AccountPage}" />
        </Tab>
        <Tab Title="{markupextensions:TranslateExtension Notifications}" Icon="bell_ring.png">
            <ShellContent ContentTemplate="{DataTemplate views:AccountPage}" />
        </Tab>
    </FlyoutItem>

    <Shell.FlyoutHeader>
        <Grid Padding="15">
            <Grid.RowDefinitions>
                <RowDefinition Height="Auto"/>
                <RowDefinition Height="Auto"/>
                <RowDefinition Height="Auto"/>
            </Grid.RowDefinitions>
            <Image Grid.Row="0" HeightRequest="70" HorizontalOptions="Start" VerticalOptions="Center" WidthRequest="70" x:Name="image">
                <Image.Source>
                    <FontImageSource FontFamily="{DynamicResource MaterialFontFamily}" Glyph="{x:Static materialIcons:MaterialDesignIcons.AccountCircle}" Size="70" Color="{StaticResource PrimaryColor}"/>
                </Image.Source>
            </Image>
            <Label Grid.Row="1" Text="Кравченко Ігор Андрійович" FontAttributes="Bold" TextColor="{StaticResource PrimaryColor}"/>
            <Label Grid.Row="2" Text="{Binding SelectedTheme}" TextColor="{StaticResource PrimaryColor}"/>
        </Grid>
    </Shell.FlyoutHeader>

    <MenuItem>
        <Shell.MenuItemTemplate>
            <DataTemplate>
                <StackLayout Orientation="Horizontal" Padding="15">
                    <Image Grid.Row="0" HeightRequest="24" HorizontalOptions="Start" VerticalOptions="Center" WidthRequest="24">
                        <Image.Source>
                            <FontImageSource FontFamily="{DynamicResource MaterialFontFamily}" Glyph="{x:Static materialIcons:MaterialDesignIcons.Brush}" Size="24" Color="{StaticResource PrimaryColor}"/>
                        </Image.Source>
                    </Image>
                    <Label PropertyChanged="OnLabelPropertyChanged" Text="{Binding ThemeTitle}" VerticalOptions="Center" VerticalTextAlignment="Center" TextColor="Black"/>                       
                </StackLayout>
            </DataTemplate>
        </Shell.MenuItemTemplate>
    </MenuItem>
</Shell>

ViewModel:

public class ShellViewModel : BaseViewModel
    {
        public string ThemeTitle
        {
            get { return "Light"; }
        }

        public ShellViewModel()
        {

        }        
    }

The text in Label is always empty.
BUT!
In method OnLabelPropertyChanged I see how the text is binded to label.

Another BUT
When I set Text without binding all works:

<Label PropertyChanged="OnLabelPropertyChanged" Text="Light" VerticalOptions="Center" VerticalTextAlignment="Center" TextColor="Black"/>

I am using Xamarin 4.3.0.819712-pre2

↧

Does Xamarin.Forms have a replacement for UWP's RoutedEventArgs?

November 10, 2019, 2:58 pm

≫ Next: The type or namespace name 'Android' does not exist in the namespace 'Xamarin.Forms.Platform'

≪ Previous: Shell MenuItem binding problem

I am working on converting my apps from UWP to Xamarin.Forms. A large number of my event handlers' second parameter was of type RoutedEventArgs (or a descendant of it). I often used the Handled property of this to control which controls' events were triggered. I am still very new to Xamarin.Forms, but it seems like it uses EventArgs instead (in the GestureRecognizers), which does not include this property. Is there anything I can do to gain functionality similar to that provided by RoutedEventArgs in Xamarin.Forms? Thanks.

↧

The type or namespace name 'Android' does not exist in the namespace 'Xamarin.Forms.Platform'

February 16, 2019, 10:29 pm

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≪ Previous: Does Xamarin.Forms have a replacement for UWP's RoutedEventArgs?

Hi guys.
I Updated my nuget packages few days ago to new versions.
but my Android project has 2 errors in MainActivity.cs:
1:
The type or namespace name 'Android' does not exist in the namespace 'Xamarin.Forms.Platform' (are you missing an assembly reference?) Sama.SamaApp.Android MainActivity.cs

2:
'MainActivity.OnCreate(Bundle)': no suitable method found to override MainActivity.cs

i search it in google and find solutions.

But i tested all solutions in two up links but not worked for me.
i tested clear nuget and dotnet caches . removing bin & obj folders . restore nuget packages . remove and reinstall Xamarin.Forms .finally clean rebuilding the solution.
But I could not fix it.
thanks...

↧