bitwarden-mobile/src/App/Pages/Vault/ScanPage.xaml

<?xml version="1.0" encoding="utf-8" ?>
<pages:BaseContentPage 
    xmlns="http://xamarin.com/schemas/2014/forms"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    x:Class="Bit.App.Pages.ScanPage"
    xmlns:pages="clr-namespace:Bit.App.Pages"
    xmlns:u="clr-namespace:Bit.App.Utilities"
    xmlns:zxing="clr-namespace:ZXing.Net.Mobile.Forms;assembly=ZXing.Net.Mobile.Forms"
    x:Name="_page"
    Title="{u:I18n ScanQrTitle}">

    <ContentPage.ToolbarItems>
        <ToolbarItem Text="{u:I18n Cancel}" Clicked="Close_Clicked" Order="Primary" Priority="-1" />
    </ContentPage.ToolbarItems>

    <Grid
        VerticalOptions="FillAndExpand"
        HorizontalOptions="FillAndExpand">

        <zxing:ZXingScannerView
            x:Name="_zxing"
            HorizontalOptions="FillAndExpand"
            VerticalOptions="FillAndExpand"
            AutomationId="zxingScannerView"
            OnScanResult="OnScanResult">
        </zxing:ZXingScannerView>

        <Grid
            VerticalOptions="FillAndExpand"
            HorizontalOptions="FillAndExpand"
            AutomationId="zxingDefaultOverlay">
            <Grid.RowDefinitions>
                <RowDefinition Height="*" />
                <RowDefinition Height="*" />
                <RowDefinition Height="*" />
            </Grid.RowDefinitions>

            <BoxView
                Grid.Column="0"
                Grid.Row="0"
                VerticalOptions="Fill"
                HorizontalOptions="FillAndExpand"
                BackgroundColor="Black"
                Opacity="0.7" />

            <Label
                Text="{u:I18n CameraInstructionTop}"
                AutomationId="zxingDefaultOverlay_TopTextLabel"
                Grid.Column="0"
                Grid.Row="0"
                VerticalOptions="Center"
                HorizontalOptions="Center"
                TextColor="White" />

            <BoxView
                Grid.Column="0"
                Grid.Row="1"
                VerticalOptions="Fill"
                HorizontalOptions="FillAndExpand"
                BackgroundColor="Transparent" />

            <BoxView
                Grid.Column="0"
                Grid.Row="2"
                VerticalOptions="Fill"
                HorizontalOptions="FillAndExpand"
                BackgroundColor="Black"
                Opacity="0.7" />

            <Label
                Text="{u:I18n CameraInstructionBottom}"
                AutomationId="zxingDefaultOverlay_BottomTextLabel"
                Grid.Column="0"
                Grid.Row="2"
                VerticalOptions="Center"
                HorizontalOptions="Center"
                TextColor="White" />
        </Grid>

    </Grid>

</pages:BaseContentPage>