I am using the xamarin essentials package for text to speech feature. When speech the text I need to highlight the corresponding text. Also, I need an option to pause/play the speech. Please see this video.

Screenshot:

How can I achieve highlight text feature and pause/play audio as the video?

Hi,

I am trying to load HTML content in a Label, for that i am getting data from web service as

I need space between bullet point and List item(

Can anyone tell me how to do this in xamarin forms.

Thanks

Hi guys! Im using Xamarin.Forms 4.7 in my project and have issue with CollectionView.
This bug appears only on iOS and is displayed in approximately one build out of 10. I guess that bottom tabbed page causes this issue. Is there any ways to fix this?

I have a picture file path and I am trying to upload this picture to server. When I upload this picture to server I need it's GetStream() value. I will show a sample code, that I have used in another place:

var content = new MultipartFormDataContent();
content.Add(new StreamContent(_mediaFile.GetStream()), "\"file\"", $"\"{_mediaFile.Path}\"");
var response = await httpClient.PostAsync(new Uri("My REST API"), content);

if (response.IsSuccessStatusCode)
{
   //Success
}

Where _mediaFile is a MediaFile

private MediaFile _mediaFile;

But currently, I have only the picture path. So is there any way to convert the picture path to MediaFile or anyway way to get the GetStream() value of the picture path?

Hi all, I have nearly 1000 records in my ListView I need to show 100 records in each page. Can any one please help me on how to add Pagination in ListView. Any sample code or proper link on how to implemented will be very helpful!!

Thank you.

Hi All,

I have a code where I have an image which the user can zoom and move the image when zoomed. I face two difficulties here and I hope someone can help:

• I can move the image in only two directions: left and up. It seems to be fixed to the right and downward somehow.
• I want that the user can only move the image left, right, up and down when zoomed. Moving the image can now already be done without any zooming, which looks a bit strange.

I have a small demo in the attachment (tested on Android).

Hope someone can help!

Regards, Ganesh

Hi everyone, I'm getting a headache to display some dashboards into my Xamarin Forms project, as you can see in the picture below it's working pretty nice at Android devices. However when it goes to IOS it doesn't work, the screen does not fill and expand and the view is not properly exhibiting in "Mobile Mode View",

I'm using a Tableau Desktop to make these dashboards and then I insert a EMBED into my HTML pages to then display it on my Xamarin, here's what I used to manage it to work, i followed Microsoft documentation to display the HTML content into a webview

And here is the Javascript embed API to display the dashboard:

    <div class='tableauPlaceholder' id='viz1587599706721' style='position: relative'>
            <noscript>
            <a href='#'>
                <img alt=' ' src='https:&#47;&#47;public.tableau.com&#47;static&#47;images&#47;Da&#47;DashboardEFColunasSample&#47;DashboardMainTest&#47;1_rss.png' style='border: none' />
                </a>
                </noscript>
            <object class='tableauViz'  style='display:none;'>
            <param name='host_url' value='https%3A%2F%2Fpublic.tableau.com%2F' />
            <param name='embed_code_version' value='3' />
            <param name='site_root' value='' />
            <param name='name' value='DashboardEFColunasSample&#47;DashboardMainTest' />
            <param name='tabs' value='no' />
            <param name='toolbar' value='yes' />
            <param name='static_image' value='https:&#47;&#47;public.tableau.com&#47;static&#47;images&#47;Da&#47;DashboardEFColunasSample&#47;DashboardMainTest&#47;1.png' />
            <param name='animate_transition' value='yes' />
            <param name='display_static_image' value='yes' />
            <param name='display_spinner' value='yes' />
            <param name='display_overlay' value='yes' />
            <param name='display_count' value='yes' />
            <param name='filter' value='publish=yes' />
                </object>
            </div>                
            <script type='text/javascript'>                   
                var divElement = document.getElementById('viz1587599706721');
                var vizElement = divElement.getElementsByTagName('object')[0];
                if (divElement.offsetWidth > 800) {
                    vizElement.style.width = '1100px';
                    vizElement.style.height = '627px';
                } else if (divElement.offsetWidth > 500) {
                    vizElement.style.width = '1100px';
                    vizElement.style.height = '627px';
                } else {
                    vizElement.style.width = '100%'; vizElement.style.height = '577px';
                } var scriptElement = document.createElement('script');
                scriptElement.src = 'https://public.tableau.com/javascripts/api/viz_v1.js';
                vizElement.parentNode.insertBefore(scriptElement, vizElement);
            </script>

HERE IS THE XAML CODE:

<TabbedPage 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"
                 xmlns:android="clr-namespace:Xamarin.Forms.PlatformConfiguration.AndroidSpecific;assembly=Xamarin.Forms.Core"
                 mc:Ignorable="d"
                 android:TabbedPage.IsSwipePagingEnabled="False"
                 android:TabbedPage.ToolbarPlacement="Bottom"
                 BarBackgroundColor="#00143D"
                 BarTextColor="White"
                 Visual="Material"
                 SelectedTabColor="DeepSkyBlue"
                 UnselectedTabColor="White"
                 x:Class="AlgorixMobile.Views.FaturamentoeEbitdaView"
                 Title="Faturamento Ebitda">
        <TabbedPage.ToolbarItems>
            <ToolbarItem IconImageSource="diagrama.png" />
        </TabbedPage.ToolbarItems>
        <TabbedPage.Children>
            <ContentPage Title="Colunas" IconImageSource="lucro.png" >
                <StackLayout>
                    <WebView x:Name="Barras"
                       HorizontalOptions="{OnPlatform Android=FillAndExpand, iOS=FillAndExpand}"
                       VerticalOptions="FillAndExpand" />
                </StackLayout>
            </ContentPage>
            <ContentPage Title="Linhas" IconImageSource="estatisticas.png">
                <StackLayout>
                    <WebView x:Name="Linhas"
                             HorizontalOptions="FillAndExpand"
                             VerticalOptions="FillAndExpand" />
                </StackLayout>
            </ContentPage>
            <ContentPage Title="Ultimos 12 meses" IconImageSource="lucro.png" >
                <StackLayout>
                    <WebView x:Name="Ultimos12"
                             HorizontalOptions="FillAndExpand"
                             VerticalOptions="FillAndExpand" />
                </StackLayout>
            </ContentPage>
            <ContentPage Title="Anual" IconImageSource="lucro.png">
                <StackLayout>
                    <WebView x:Name="Anual"
                             HorizontalOptions="FillAndExpand"
                             VerticalOptions="FillAndExpand" />
                </StackLayout>
            </ContentPage>
        </TabbedPage.Children>
    </TabbedPage>

What I need is to make it work on IOS the same way as it is working at the Android, can anyone help ?

I mean is it possible to force the ios to recognize as a mobile device the HTML content if so how to make it shows on full screen mode?

Thanks in advance!

I am a newbie in Xamarin.Forms and the architect in our team mentioned, if we wanted a clean architecture, we must avoid using Xamarin.Forms in ViewModel as it references Views directly so it actually doesn't decouple.

But in the most of the tutorials, guides I don't see this being followed.

Can anyone suggest what's the correct guideline, and how does it really support this decoupling? Does everyone follow the same?
Also, when I try to use buttonclick event via a Command class in the ViewModel, I can't use it without using Xamarin.Forms namespace.

How can I achieve pure decoupling without using the Command class?

Hi,

I am trying to load HTML content in a Label. I am getting Data like

I have a div with class name "MobileBody". I want to apply style to it.
I tried the below one but it is working for only IOS, for Android All style tags are displaying ...
if (DeviceInfo.Platform.ToString() == "iOS")
{
ParagraphDesc = ".mobileBody{font-family:Roboto Slab; font-size:14px}" + responseData.BodyContent;
}

Can any one help on this

Hi. I'm trying to pass a List from one view to another, using the MVVM pattern. In my project, I want to store the questions from a List (questions) into another list (errores) and I want to display "errores" in another view. Basically, whenever the wrong True/False button is pressed, I want to store the question into "errores".

Here's what I've tried:

{
    private List<string> errores;

    public RESULTSPAGE2(List<string> errores)
    {
        InitializeComponent();

        MainListView.ItemsSource = errores;


    }


    }
}

//RESULTSPAGE2.xaml
<ContentPage.Content>
        <StackLayout>
            <ListView 
             x:Name="MainListView"   />
        </StackLayout>
    </ContentPage.Content>
</ContentPage>








class QuizPageModel : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;

    void OnPropertyChanged([CallerMemberName] string name = "")
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));
    }

    public List<Question> questions;

    List<string> errores = new List<string>();



    private string _textopregunta;

    public string TextoPregunta
    {
        get
        {
            return _textopregunta;
        }

        set
        {
            _textopregunta = value;
            OnPropertyChanged();
        }
    }

    //Add Color
    /* private Color _BackgroundFalseButton;

     public Color BackgroundFalseButton
     {
         get
         {
             return _BackgroundFalseButton;
         }
         set
         {
             _BackgroundFalseButton = value; //You must implement INotifyChanged
             OnPropertyChanged(nameof(BackgroundFalseButton));
         }

     }*/



    private bool _wrongAnswer;
    public bool WrongAnswer
    {
        get
        {
            return _wrongAnswer;
        }

        set
        {
            _wrongAnswer = value;
            OnPropertyChanged();
        }
    }


    private bool _currentAnswerValue;
    public bool CurrentAnswerValue
    {
        get
        {
            return _currentAnswerValue;
        }

        set
        {
            _currentAnswerValue = value;
            OnPropertyChanged();
        }
    }

    private int _totalQuestions;
    public int TotalQuestions
    {
        get
        {
            return _totalQuestions;
        }

        set
        {
            _totalQuestions = value;
            OnPropertyChanged();
            OnPropertyChanged(nameof(TitleText));
        }
    }

    private int _currentQuestionNumber;
    public int CurrentQuestionNumber
    {
        get
        {
            return _currentQuestionNumber;
        }

        set
        {
            _currentQuestionNumber = value;
            OnPropertyChanged();
            OnPropertyChanged(nameof(TitleText));
        }
    }

    public string TitleText
    {
        get { return $"Question {_currentQuestionNumber} of {_totalQuestions}"; }
    }

    private int score;

    private Random random;

    public Command AnsweredTrue { get; }
    public Command AnsweredFalse { get; }
    public string QuestionText { get; }



    public QuizPageModel()
    {
        // initialise RNG
       random = new Random();

        // populate question list - replace with external data source in production
        questions = new List<Question>()
        {
            new Question() { QuestionText="1=2", Answer=false } ,
            new Question() { QuestionText="2+2=3", Answer=false },
            ..........
        };



            // initialise quiz values
            TotalQuestions = questions.Count;
        CurrentQuestionNumber = 1;
        score = 0;

        // load first question
        LoadQuestion();



        //True/False

        AnsweredTrue = new Command<Question>(async (question) =>
        {
            Debug.WriteLine("True button pressed");


            /* AnsweredTrue = new Command(async () =>
             {
             Debug.WriteLine("True button pressed");*/

            // check if answer is correct
            if (_currentAnswerValue == true)

                score++;



            else
            {

                errores.Add(QuestionText);


            }


        // load next question or results page
        if (CurrentQuestionNumber < TotalQuestions)
        {
            // increase question counter
            CurrentQuestionNumber++;
            LoadQuestion();
        }
        else
        {
            Debug.WriteLine("End of Quiz");
            await ShowResults().ConfigureAwait(false);
        }
    });



        AnsweredFalse = new Command(async () =>
        {
            Debug.WriteLine("False button pressed");



            // check if answer is correct
            if (_currentAnswerValue == false)
                score++;

            else
            {
                errores.Add(QuestionText);
                //_wrongAnswer = true;

            }


        /*    if (_wrongAnswer == true)
            {
                errores.Add(QuestionText);

            }

            */

        // load next question or results page
        if (CurrentQuestionNumber < TotalQuestions)
        {
            // increase question counter
            CurrentQuestionNumber++;
            LoadQuestion();
        }
        else
        {
            Debug.WriteLine("End of Quiz");
            await ShowResults().ConfigureAwait(false);
        }
    });
    }


    private void LoadQuestion()
    {
        var index = random.Next(questions.Count);
        TextoPregunta = questions[index].QuestionText;
        CurrentAnswerValue = questions[index].Answer;
        questions.RemoveAt(index);
    }

    // private async Task ShowResults() => await Application.Current.MainPage.Navigation.PushAsync(new LVTest(score, _totalQuestions, errores)).ConfigureAwait(false);
    private async Task ShowResults() => await Application.Current.MainPage.Navigation.PushAsync(new RESULTSPAGE2(errores));

}

}

I'm using a TabbedPage with Xamarin.Forms, and when a user is already on Tab 2, and clicks on Tab 2, I'd either like that tab to reload, or i'd like to run my own custom code to refresh the page.

I have been trying to find any sort of event I could hook into, or a way to do this with custom renderers but have been unable to find anything. What's the simplest way to do this?

Thanks!

I'm having issues with binding in iOS. We have numerous forms in our app and they're broadly set out as per the example with an Entry and an associated label for validation feedback - we're using FluentValidation for this. The label is hidden unless there are errors to show, this is so they take up no space on the interace when not required.

<Entry x:Name="UsernameEntry" 
    Placeholder="{Binding UILabelLoginName}"
    IsTextPredictionEnabled="False"
    PlaceholderColor="#333333"
    TextColor="#000000" 
    ReturnType="Done"
        Text="{Binding LoginName.Value}"
        InputTransparent="False">
    <Entry.Behaviors>
        <behaviors:EventToCommandBehavior
            Command="{Binding ClearValidationCommand}"
            CommandParameter="LoginName"
            EventName="Focused" />
    </Entry.Behaviors>
</Entry>

<Label
    IsVisible="{Binding LoginName.IsValid, Converter={StaticResource InverseBoolean}}"
    Style="{StaticResource ErrorLabelStyle}"
        Text="{Binding LoginName.FirstError}" />

This works lovely in Android, in iOS though the binding to IsVisible crashes the app. If we set IsVisible to true as opposed to binding it and set a fixed HeightRequest then it works fine but I don't want empty labels taking up space within the forms.

Android - On Load

Android - On Error

iOS - On Load (IsVisible set to Binding)

iOS - On Error (IsVisible set to Binding)

• Crash

iOS - On Load (IsVisible set to True)

iOS - On Error (IsVisible set to True)

The exception at the time of the crash is,

Object reference not set to an instance of an object

at Xamarin.Forms.Platform.iOS.VisualElementTracker.UpdateClip () [0x00072] in \a\1\s\Xamarin.Forms.Platform.iOS\VisualElementTracker.cs:413
at Xamarin.Forms.Platform.iOS.VisualElementTracker.UpdateNativeControl () [0x0006c] in \a\1\s\Xamarin.Forms.Platform.iOS\VisualElementTracker.cs:386
at Xamarin.Forms.Platform.iOS.VisualElementTracker.HandlePropertyChanged (System.Object sender, System.ComponentModel.PropertyChangedEventArgs e) [0x00064] in \a\1\s\Xamarin.Forms.Platform.iOS\VisualElementTracker.cs:97
at (wrapper delegate-invoke) .invoke_void_object_PropertyChangedEventArgs(object,System.ComponentModel.PropertyChangedEventArgs)
at Xamarin.Forms.BindableObject.OnPropertyChanged (System.String propertyName) [0x00000] in \a\1\s\Xamarin.Forms.Core\BindableObject.cs:229
at Xamarin.Forms.Element.OnPropertyChanged (System.String propertyName) [0x00000] in \a\1\s\Xamarin.Forms.Core\Element.cs:353
at Xamarin.Forms.BindableObject.SetValueActual (Xamarin.Forms.BindableProperty property, Xamarin.Forms.BindableObject+BindablePropertyContext context, System.Object value, System.Boolean currentlyApplying, Xamarin.Forms.Internals.SetValueFlags attributes, System.Boolean silent) [0x00114] in \a\1\s\Xamarin.Forms.Core\BindableObject.cs:461
at Xamarin.Forms.BindableObject.SetValueCore (Xamarin.Forms.BindableProperty property, System.Object value, Xamarin.Forms.Internals.SetValueFlags attributes, Xamarin.Forms.BindableObject+SetValuePrivateFlags privateAttributes) [0x00173] in \a\1\s\Xamarin.Forms.Core\BindableObject.cs:397
at Xamarin.Forms.BindableObject.SetValue (Xamarin.Forms.BindableProperty property, System.Object value, System.Boolean fromStyle, System.Boolean checkAccess) [0x00042] in \a\1\s\Xamarin.Forms.Core\BindableObject.cs:334
at Xamarin.Forms.BindableObject.SetValue (Xamarin.Forms.BindablePropertyKey propertyKey, System.Object value) [0x0000e] in \a\1\s\Xamarin.Forms.Core\BindableObject.cs:318
at Xamarin.Forms.VisualElement.set_Height (System.Double value) [0x00000] in \a\1\s\Xamarin.Forms.Core\VisualElement.cs:324
at Xamarin.Forms.VisualElement.SetSize (System.Double width, System.Double height) [0x0001a] in \a\1\s\Xamarin.Forms.Core\VisualElement.cs:1081
at Xamarin.Forms.VisualElement.set_Bounds (Xamarin.Forms.Rectangle value) [0x0005d] in \a\1\s\Xamarin.Forms.Core\VisualElement.cs:316
at Xamarin.Forms.VisualElement.Layout (Xamarin.Forms.Rectangle bounds) [0x00000] in \a\1\s\Xamarin.Forms.Core\VisualElement.cs:708
at Xamarin.Forms.Layout.LayoutChildIntoBoundingRegion (Xamarin.Forms.VisualElement child, Xamarin.Forms.Rectangle region) [0x001da] in \a\1\s\Xamarin.Forms.Core\Layout.cs:178
at Xamarin.Forms.TemplatedView.LayoutChildren (System.Double x, System.Double y, System.Double width, System.Double height) [0x00019] in \a\1\s\Xamarin.Forms.Core\TemplatedView.cs:29
at Xamarin.Forms.Layout.UpdateChildrenLayout () [0x00158] in \a\1\s\Xamarin.Forms.Core\Layout.cs:266
at Xamarin.Forms.Layout.OnSizeAllocated (System.Double width, System.Double height) [0x0000f] in \a\1\s\Xamarin.Forms.Core\Layout.cs:224
at Xamarin.Forms.VisualElement.SizeAllocated (System.Double width, System.Double height) [0x00000] in \a\1\s\Xamarin.Forms.Core\VisualElement.cs:812
at Xamarin.Forms.VisualElement.SetSize (System.Double width, System.Double height) [0x00021] in \a\1\s\Xamarin.Forms.Core\VisualElement.cs:1083
at Xamarin.Forms.VisualElement.set_Bounds (Xamarin.Forms.Rectangle value) [0x0005d] in \a\1\s\Xamarin.Forms.Core\VisualElement.cs:316
at Xamarin.Forms.VisualElement.Layout (Xamarin.Forms.Rectangle bounds) [0x00000] in \a\1\s\Xamarin.Forms.Core\VisualElement.cs:708
at Xamarin.Forms.Layout.LayoutChildIntoBoundingRegion (Xamarin.Forms.View child, Xamarin.Forms.Rectangle region, Xamarin.Forms.SizeRequest childSizeRequest) [0x00225] in \a\1\s\Xamarin.Forms.Core\Layout.cs:319
at Xamarin.Forms.StackLayout.LayoutChildren (System.Double x, System.Double y, System.Double width, System.Double height) [0x00081] in \a\1\s\Xamarin.Forms.Core\StackLayout.cs:65
at Xamarin.Forms.Layout.UpdateChildrenLayout () [0x00158] in \a\1\s\Xamarin.Forms.Core\Layout.cs:266
at Xamarin.Forms.Layout.OnSizeAllocated (System.Double width, System.Double height) [0x0000f] in \a\1\s\Xamarin.Forms.Core\Layout.cs:224
at Xamarin.Forms.VisualElement.SizeAllocated (System.Double width, System.Double height) [0x00000] in \a\1\s\Xamarin.Forms.Core\VisualElement.cs:812
at Xamarin.Forms.Layout.ResolveLayoutChanges () [0x0005c] in \a\1\s\Xamarin.Forms.Core\Layout.cs:392
at Foundation.NSAsyncActionDispatcher.Apply () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/13.18.2.1/src/Xamarin.iOS/Foundation/NSAction.cs:152
--- End of stack trace from previous location where exception was thrown ---

at (wrapper managed-to-native) UIKit.UIApplication.UIApplicationMain(int,string[],intptr,intptr)
at UIKit.UIApplication.Main (System.String[] args, System.IntPtr principal, System.IntPtr delegate) [0x00005] in /Library/Frameworks/Xamarin.iOS.framework/Versions/13.18.2.1/src/Xamarin.iOS/UIKit/UIApplication.cs:86
at UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x0000e] in /Library/Frameworks/Xamarin.iOS.framework/Versions/13.18.2.1/src/Xamarin.iOS/UIKit/UIApplication.cs:65
at xxxx.iOS.Application.Main (System.String[] args) [0x00002] in C:\xxxx\xxxx.iOS\Main.cs:19

Any guidance would be very much appreciated!

Thanks

Hi All,
As I wrote in the title, it's possible to add Tap gesture to the Entry?
This code works for Label but doesn't work for Entry:

var tapEntryRecognizer = new TapGestureRecognizer(); tapFocusEntryRecognizer.Tapped += async (s, e) => { Console.WriteLine("tapped"); }; tapEntry.GestureRecognizers.Add(tapFocusEntryRecognizer);

I searched alot on internet but found no solution..Badge can be easily inserted in tabbed page but i am using Shell page..Anyone have code how to show badge in bottom tab in shell page?

Hello people!

I'm trying to use VisualStateManager for a more consistent state change setup. My problem is, it doesn't seem to be able to recognize components that lie within other containers. Take for instance the following xaml:

            <StackLayout x:Name="CMD" Orientation="Horizontal"  BackgroundColor="Transparent"
                         Margin="0,0,5,0" IsEnabled="False">
                <VisualStateManager.VisualStateGroups>
                    <VisualStateGroup Name="CommonStates">
                        <VisualState Name="Disabled">
                            <VisualState.Setters>
                                <Setter TargetName="icon"
                                        Property="Label.TextColor"
                                        Value="{DynamicResource colors/disabled}" />
                                <Setter TargetName="text"
                                        Property="Label.TextColor"
                                        Value="{DynamicResource colors/disabled}" />
                            </VisualState.Setters>
                        </VisualState>
                    </VisualStateGroup>
                </VisualStateManager.VisualStateGroups>
                <Grid ColumnDefinitions="Auto,Auto,*">
                    <Label Grid.Column="0"
                                     WidthRequest="20"
                                     HeightRequest="20"
                                     Margin="0,0,10,0"
                                     Text="X"
                                     x:Name="icon" />
                    <Label Grid.Column="1"
                                  x:Name="text"
                                  Text="{Binding AddItemText}"
                                  TextColor="{DynamicResource colors/accent}"/>
                </Grid>
            </StackLayout>

This is just a representation of the original code, which contains custom controls - but the error is the same:

"InvalidOperationException: 'this element is not in a namescope'"

This only happens when the IsEnabled="False" property is set in the parent component.

In my real code, the enabled state is set based on a series of conditions, and when trying to set the IsEnabled property in code, I get a NullReferenceException in the Setter... presumably because it can't find the item in question.

Is this a known problem? Is there a solution to this?

Hello,

As you can read here, https://developer.android.com/reference/android/os/Build#getSerial(),
from API level 29 and after, asking for the device's serial number throws an exception.

Is there a way to get the serial number from a device regardless of its API level?

Or is there a unique identifier of the device, that he will remain forever the same, and that its available to the user and to me (by code)??
I want the user to give me the identifier so I can register the device manually, but after that I want to read the identifier for the code...

My app maybe installed to user's personal phones so I do not want anything special like profile owner or root apps or stuff like that...

Thanks!!!

I got on GitHub this project to access Google Drive using Xamarin.Forms solution. Good that it works perfectly for Android. I wanted to extend to iOS & UWP. Google Drive API needs an Android Activity 'Custom URL Schem Interceptor'. I need how to implement it for iOS & UWP. The android activity code is given below. Someone might have already done that I hope.

using Android.App;
using Android.Content;
using Android.Content.PM;
using Android.OS;
using System;
using Xamarin.Auth;

namespace XFCloudStorage.Droid
{
    [Activity(Label = "CustomUrlSchemeInterceptor", NoHistory = true, LaunchMode = LaunchMode.SingleTop)]
    [IntentFilter(new[] { Intent.ActionView }, Categories = new[] { Intent.CategoryDefault, Intent.CategoryBrowsable }, DataSchemes = new[] { "com.esmsmartsolutions.xfcloudstorage" }, DataPath = "/oauth2redirect")]
    public class ActivityCustomUrlSchemeInterceptor : Activity
    {
        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);
            global::Android.Net.Uri uri_android = Intent.Data;
            CustomTabsConfiguration.CustomTabsClosingMessage = null;
            var uri = new Uri(Intent.Data.ToString());
            AuthenticatorHelper.OAuth2Authenticator.OnPageLoading(uri);
            var intent = new Intent(this, typeof(MainActivity));
            intent.SetFlags(ActivityFlags.ClearTop | ActivityFlags.SingleTop);
            StartActivity(intent);
            this.Finish();
            return;
        }
    }
}

I worked with VS 2017 until recently, and changed to VS 2019.
I also updated Xamarin.Forms

I try a simple app with a service, which works fine on the emulator.
When I try to run it on a real device, I get the next deployment error:

ADB0010: Deployment failedMono.AndroidTools.InstallFailedException: Unexpected install output: pkg: /data/local/tmp/com.companyname.tryservice_proj-Signed.apkFailure [INSTALL_PARSE_FAILED_MANIFEST_MALFORMED] at Mono.AndroidTools.Internal.AdbOutputParsing.CheckInstallSuccess(String output, String packageName) in E:\A_work\963\s\External\androidtools\Mono.AndroidTools\Internal\AdbOutputParsing.cs:line 348

In my searching I've seen that possible reason can be that the name of the package begins with a Capital letter.
I've checked in AndroidManifest.xml and it begin with a small letter as it should

Any suggestion will be appreciated.

Good evening, I'm trying to create a listview with mvvm model with inside it a "Polygon" element in the item-template.
I have a button inside that allows you to hide / show elements and the RefreshListViewItem method is called from code at the click of the button .
On refreshing it would appear that the "Polygon" loses the data binding of the model.
Is anyone else having this problem?
Thank you!