打开手机键盘后，我的视线完全向上滑动

Question

我的观点是，当我打开手机的键盘时，它会随所有东西和顶部栏一起完全移动，我需要从包含聊天功能的应用中确定顶部栏是固定的，并且只有当键盘打开，消息就会移动。

<?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:common="clr-namespace:HomieApp.Views.Common;assembly=HomieApp"
             xmlns:app="clr-namespace:HomieApp;assembly=HomieApp"
             xmlns:helpers="clr-namespace:HomieApp.Helpers;assembly=HomieApp"
             xmlns:forms="clr-namespace:Lottie.Forms;assembly=Lottie.Forms" 
             x:Class="HomieApp.Views.Servicio.ChatPage">
    <ContentPage.Resources>
        <ResourceDictionary>
            <DataTemplate x:Key="leftChatTemplate">
                <ViewCell>
                    <common:ChatLeftMessageItemTemplate />
                </ViewCell>
            </DataTemplate>
            <DataTemplate x:Key="rightChatTemplate">
                <ViewCell>
                    <common:ChatRightMessageItemTemplate />
                </ViewCell>
            </DataTemplate>
            <helpers:ChatDataTemplateSelector x:Key="chatDataTemplateSelector"
                                              LeftChatTemplate="{StaticResource leftChatTemplate}"
                                              RightChatTemplate="{StaticResource rightChatTemplate}" />
        </ResourceDictionary>
    </ContentPage.Resources>

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

        <common:MainLabelNavigation 
            Grid.Row="0"
            HorizontalOptions="FillAndExpand"
            x:Name="bar"
            IsVisibleMenu="True"
                                    Clicked="Bar_OnClicked"></common:MainLabelNavigation>

        <Grid Grid.Row="1">
            <Grid.RowDefinitions>
                <RowDefinition Height="Auto"/>
                <RowDefinition Height="*"/>
                <RowDefinition Height="Auto"/>
            </Grid.RowDefinitions>

            <ListView
            x:Name="ListViewMensajes"
            Grid.Row="1"
            ItemsSource="{Binding Mensajes}"
            SeparatorVisibility="None"
            SeparatorColor="Transparent"
            HasUnevenRows="True"
            ItemTapped="OnItemTapped"
            ItemTemplate="{StaticResource chatDataTemplateSelector}">
            </ListView>

            <!--- BUTTONS CONTAINER  -->
            <Grid 
            x:Name="ContainerSend"
            Grid.Row="2" 
            ColumnSpacing="5"
            Padding="0"
            MinimumHeightRequest="40">

                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="*" />
                    <ColumnDefinition Width="*" />
                </Grid.ColumnDefinitions>

                <Grid.RowDefinitions>
                    <RowDefinition Height="40"/>
                    <RowDefinition Height="55"/>
                </Grid.RowDefinitions>

                <app:GradientButton Grid.Row="0" Grid.Column="0"
                                    Margin="0,0,0,0"
                                    VerticalOptions="End" 
                                    HorizontalOptions="FillAndExpand"
                               Command="{Binding EnviarVideoCommand}"
                                    ButtonType="Gray"
                                    Text="Tomar Video"/>

                <app:GradientButton Grid.Row="0" Grid.Column="1"
                                    Margin="0,0,0,0"
                               VerticalOptions="End" 
                               HorizontalOptions="FillAndExpand"
                               Command="{Binding EnviarImagenCommand}"
                                    ButtonType="Gray"
                               Text="Tomar Foto"/>


                <StackLayout Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="2"
                             Margin="0,0,0,15"
                         BackgroundColor="{ DynamicResource TranslucidOrange }" 
                         Orientation="Horizontal">
                    <!--- ENTRY  -->
                    <Entry 
                    HorizontalOptions="FillAndExpand"
                    FontSize="14"
                    Placeholder="Escribe tu mensaje..."
                    Text="{Binding Path=Mensaje, Mode=TwoWay}"/>
                    <!--- SEND BUTTON  -->
                    <app:FontAwesomeIcon
                    x:Name="SendButton"
                    HorizontalOptions="End"
                    Margin="10,0"
                    Text="{ x:Static app:Icon.FAPlay }"
                    FontSize="20"
                    TextColor="{StaticResource BorderTextColor}"
                    Style="{ StaticResource FontIcon }"
                    VerticalTextAlignment="Center"
                    HorizontalTextAlignment="Center"/>
                </StackLayout>

            </Grid>

            <app:CustomActivityIndicator
            IsVisible="{Binding IsLoading}"
            Grid.Row="0" Grid.RowSpan="3"
            HorizontalOptions="FillAndExpand"
            VerticalOptions="FillAndExpand"/>

        </Grid>
    </Grid>


</ContentPage>

我已经尝试过以各种方式更改视图，但是由于我是Xamarin开发应用程序的新手，所以我仍然不了解或不了解它们处理得很好。