.NET MAUI getting error on Android

Bhuwan 636

in .NET MAUI getting below error when select picker on Android and on iOS it's working fine

Android.Views.InflateException: 'Binary XML file line #23 in com.test.dev:layout/mtrl_alert_select_dialog_item: Binary XML file line #23 in com.test.dev:layout/mtrl_alert_select_dialog_item: Error inflating class TextView'

error comes when select picker

<Grid ColumnDefinitions="Auto,*" Grid.Row="2" Grid.Column="1" ColumnSpacing="10" IsVisible="{Binding IsItemFrequency}" Margin="0,0,0,10" HorizontalOptions="FillAndExpand">
    <Label Grid.Column="0" VerticalOptions="Center" Margin="0"
                Text="Deliver"
                FontSize="16"
                FontFamily="OpenSansRegular"
                HorizontalTextAlignment="Start" VerticalTextAlignment="Center" 
                TextColor="{StaticResource BodyTextColor}"/>
    <Border Grid.Column="1" Margin="0" Padding="0" HorizontalOptions="FillAndExpand"  Stroke="#707070" HeightRequest="41">
        <Border.StrokeShape>
            <RoundRectangle CornerRadius="10" StrokeThickness="1"/>
        </Border.StrokeShape>
        <Grid ColumnDefinitions="*,Auto,Auto" HorizontalOptions="FillAndExpand" BackgroundColor="Transparent" Padding="5,0">
            <Picker x:Name="pkItem" x:FieldModifier="public" Grid.Column="0" BackgroundColor="Transparent"
                                TextColor="{StaticResource BodyTextColor}" FontFamily="OpenSansRegular"
                                HorizontalOptions="FillAndExpand" FontSize="12" 
                                HorizontalTextAlignment="Start"
                                VerticalTextAlignment="Center"
                                ItemDisplayBinding="{Binding Text}"
                                ItemsSource="{Binding AutoItemLists}"  SelectedIndex="{Binding AutoItemSelectedIndex}" Unfocused="pkItem_Unfocused"/>
            <svg:SvgCachedImage CacheDuration="30" RetryCount="3" RetryDelay="250" IsEnabled="False" Grid.Column="2" WidthRequest="15" Source="icon_arrow_down" HorizontalOptions="EndAndExpand" Margin="0,0,5,0"/>
            <Grid.GestureRecognizers>
                <TapGestureRecognizer x:Name="GridItem" Tapped="GridItem_Tapped" NumberOfTapsRequired="1"/>
            </Grid.GestureRecognizers>
        </Grid>
    </Border>
</Grid>

Leon Lu (Shanghai Wicresoft Co,.Ltd.) 72,336 Reputation points Microsoft Vendor

2024-04-01T05:27:57.8766667+00:00
What is your .NET version?

Please share your background code about Picker's following property and the Grid's GridItem_Tapped method.

ItemDisplayBinding="{Binding Text}" ItemsSource="{Binding AutoItemLists}" SelectedIndex="{Binding AutoItemSelectedIndex}" Unfocused="pkItem_Unfocused"

Can you create a new MAUI project and copy these part od code in it? Will you get the same issue?

I copy your code in my MAUI project, it is working in my side.

Bhuwan 636

i am using .NET 8

below is the code

void GridItem_Tapped(System.Object sender, TappedEventArgs e)
{
    try
    {
        var pkAutoItemFreq = ((Grid)sender).Children[0] as Picker;
        if (!pkAutoItemFreq.IsFocused)
        {
            pkAutoItemFreq.Focus();
        }
    }
    catch (Exception ex)
    {
        
    }
}

Leon Lu (Shanghai Wicresoft Co,.Ltd.) 72,336 Reputation points Microsoft Vendor

2024-04-03T08:17:19.34+00:00

I cannot reproduce this issue. Could you create a mini demo what is needed to reproduce the problem? You can transfer this mini demo in the Private Message.
Bhuwan 636 Reputation points

2024-04-05T12:21:49.31+00:00
Hi @Leon Lu (Shanghai Wicresoft Co,.Ltd.) ,
I am currently facing an issue with picker selection on Android across the entire app. While picker functionality works fine on iOS, on Android, selecting a picker results in a crash. None of the pickers are functioning as intended.
version .net 8.0

Visual Studio version - 17.9.5

Android - 14

<PackageReference Include="CommunityToolkit.Maui" Version="8.0.1" /> <PackageReference Include="CommunityToolkit.Mvvm" Version="8.2.2" /> <PackageReference Include="Microsoft.Maui.Controls" Version="8.0.14" /> <PackageReference Include="Microsoft.Maui.Controls.Compatibility" Version="8.0.14" />
Bhuwan 636 Reputation points

2024-04-05T13:28:17.1166667+00:00

I created a new project and added a picker, and it's working fine there. I'm unsure why it's not functioning properly in my current project.
Bhuwan 636 Reputation points

2024-04-05T13:28:43.4233333+00:00

I created a new project and added a picker, and it's working fine there. I'm unsure why it's not functioning properly in my current project.
Bhuwan 636 Reputation points

2024-04-08T07:41:54.29+00:00

Hi @Leon Lu (Shanghai Wicresoft Co,.Ltd.) I've confirmed that the issue is occurring on Android because the Focused and Unfocused events are not triggering. Can you provide some suggestions or any alternative solutions for Android? These events are functioning properly on iOS devices.
Leon Lu (Shanghai Wicresoft Co,.Ltd.) 72,336 Reputation points Microsoft Vendor

2024-04-08T09:28:42.8+00:00

Please copy code from Set the ItemsSource property to your project, is that working? If it is working, you can add other properties one by one. Add a perperty, then make a test. We can troubleshoot which property have issue.
Bhuwan 636 Reputation points

2024-04-08T10:12:29.4766667+00:00

Now, everything is working fine, but when I select any item and then click elsewhere, the picker's 'unfocused' event is not triggering.
Bhuwan 636 Reputation points

2024-04-08T12:40:24.2166667+00:00

Hi @Leon Lu (Shanghai Wicresoft Co,.Ltd.) ,

please find the attached sample application for your reference. The 'unfocused' event is not triggered after selecting an item.

Link: Sample Application

I'm attempting to send a private message, but I'm not familiar with the process. Therefore, I've created this sample project and shared it for your reference.
Leon Lu (Shanghai Wicresoft Co,.Ltd.) 72,336 Reputation points Microsoft Vendor

2024-04-09T08:35:36.8833333+00:00

Please add an Entry or another Picker in your layout. When you click the Entry or another Picker, your Picker's UnFocus event will be invoked.

Actually, Picker combines an Entry and Popup window in android. If you Picker gets the focus (Underline will discolor, Normal color is purple), If you Just have only one Picker, your picker always get focus, so this UnFocus event will not be invoked.

Do you want to close this Picker's popup window by C# code in android?
Bhuwan 636 Reputation points

2024-04-09T09:05:10.13+00:00

In my previous Xamarin.Forms application, this functionality was working. However, after upgrading to MAUI, it's no longer functioning, even though I'm using the same functionality across all pickers within my application. I have opened a ticket as a bug report. Please find the attached link.

https://github.com/dotnet/maui/issues/21704
Leon Lu (Shanghai Wicresoft Co,.Ltd.) 72,336 Reputation points Microsoft Vendor

2024-04-10T06:54:13.4266667+00:00

Thanks for your update. Please track on this issue in the MAUI GitHub repo.
Bhuwan 636 Reputation points

2024-04-10T07:04:12.3133333+00:00

Hi @Leon Lu (Shanghai Wicresoft Co,.Ltd.)
Currently, I am using the PickerField NuGet package from 'https://enisn-projects.io/docs/en/uranium/latest/themes/material/components/PickerField', and it's functioning as expected. However, I am also monitoring the MAUI Picker Unfocused issue. In case of any problems, I have found alternative Uranium controls.
Bhuwan 636 Reputation points

2024-04-10T08:45:11.69+00:00
Hi @Leon Lu (Shanghai Wicresoft Co,.Ltd.)

The below issue occurs due to the code in Android's MainActivity.cs. After removing this code, the error no longer appears, and the app does not crash. Now, the only pending issue is the Unfocused one, and I am tracking this bug on GitHub.

Error as above asking by me-

Android.Views.InflateException: 'Binary XML file line #23 in com.test.dev:layout/mtrl_alert_select_dialog_item: Binary XML file line #23 in com.test.dev:layout/mtrl_alert_select_dialog_item: Error inflating class TextView'

below Code is suggested on this link to me
https://learn.microsoft.com/en-us/answers/questions/1611437/how-can-i-prevent-the-device-font-size-effect-of-a

public override Android.Content.Res.Resources? Resources { get { Android.Content.Res.Resources resource = base.Resources; Android.Content.Res.Configuration configuration = new Android.Content.Res.Configuration(); configuration.SetToDefaults(); if (Build.VERSION.SdkInt >= BuildVersionCodes.NMr1) { return CreateConfigurationContext(configuration).Resources; } else { resource.UpdateConfiguration(configuration, resource.DisplayMetrics); return resource; } }
Leon Lu (Shanghai Wicresoft Co,.Ltd.) 72,336 Reputation points Microsoft Vendor

2024-04-11T07:25:19.99+00:00

How can I prevent the device font size effect of a Xamarin Android app?

Could you share more details about this issue?

What is the expected behavior and how does that differ from the actual behavior?
Leon Lu (Shanghai Wicresoft Co,.Ltd.) 72,336 Reputation points Microsoft Vendor

2024-04-11T07:26:25.3833333+00:00

Now, the only pending issue is the Unfocused one, and I am tracking this bug on GitHub.

I create a Xamarin project with your layout code, I can reproduce your issue. It works in the Xamarin.
Bhuwan 636 Reputation points

2024-04-11T11:27:58.83+00:00

When I change the device fonts, specifically the Android Fonts setting, it also reflects in my MAUI app. However, this causes my application's UI to break. Therefore, I am querying how to prevent this setting change in .NET MAUI.

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.NET MAUI getting error on Android