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<?xml version="1.0" encoding="UTF-8"?>
<ContentView xmlns="http://xamarin.com/schemas/2014/forms" 
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" 
             x:Class="ChatUIXForms.Views.Partials.ChatInputBarView" 
             xmlns:controls="clr-namespace:ChatUIXForms.Controls">
     <Grid RowSpacing="0" 
           ColumnSpacing="0">
               <Grid.RowDefinitions>
                     <RowDefinition Height="Auto" />
                </Grid.RowDefinitions>

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using System;
using UIKit;
using Xamarin.Forms;
using Xamarin.Forms.Platform.iOS;
using Foundation;
using CoreGraphics;
using ChatUIXForms.Views.Partials;
using ChatUIXForms.iOS.Renderers;

[assembly: ExportRenderer(typeof(ChatInputBarView), typeof(ChatEntryRenderer))]

rdelrosario

<?xml version="1.0" encoding="UTF-8"?>
<ContentView xmlns="http://xamarin.com/schemas/2014/forms" 
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" 
             x:Class="ChatUIXForms.Views.Partials.ChatInputBarView" 
             xmlns:controls="clr-namespace:ChatUIXForms.Controls">
     <Grid RowSpacing="0" 
           ColumnSpacing="0">
               <Grid.RowDefinitions>
                     <RowDefinition Height="Auto" />
                </Grid.RowDefinitions>

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     Xamarin.Forms.Application.Current.On<Xamarin.Forms.PlatformConfiguration.Android>().UseWindowSoftInputModeAdjust(WindowSoftInputModeAdjust.Resize);

            if (Build.VERSION.SdkInt >= BuildVersionCodes.Lollipop)
            {
                Window.DecorView.SystemUiVisibility = 0;
                var statusBarHeightInfo = typeof(Xamarin.Forms.Platform.Android.FormsAppCompatActivity).GetField("_statusBarHeight", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic);
                statusBarHeightInfo?.SetValue(this, 0);
                Window.SetStatusBarColor(new Android.Graphics.Color(0, 0, 0, 255)); // Change color as required.
            }

rdelrosario

using System;
using Xamarin.Forms;

namespace ChatUIXForms.Controls
{
    public class ExtendedEditorControl : Editor
    {
        public static BindableProperty PlaceholderProperty
          = BindableProperty.Create(nameof(Placeholder), typeof(string), typeof(ExtendedEditorControl));

rdelrosario

using System.ComponentModel;
using Android.Content;
using Android.Content.Res;
using Android.Graphics.Drawables;
using ChatUIXForms.Controls;
using ChatUIXForms.Droid.Renderers;
using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;

[assembly: ExportRenderer(typeof(ExtendedEditorControl), typeof(CustomEditorRenderer))]

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  protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
        {
            base.OnElementPropertyChanged(sender, e);

            var customControl = (ExtendedEditorControl)Element;

            if (e.PropertyName == Editor.TextProperty.PropertyName)
            {
                if (customControl.IsExpandable)
                {

rdelrosario

using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using ChatUIXForms.Controls;
using ChatUIXForms.iOS.Renderers;
using CoreGraphics;
using Foundation;
using UIKit;
using Xamarin.Forms;
using Xamarin.Forms.Platform.iOS;

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 Device.BeginInvokeOnMainThread(() =>
                  ChatList.ScrollTo((this.BindingContext as ChatPageViewModel).Messages.Last(), ScrollToPosition.End, false)
              );

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Input;
using ChatUIXForms.ViewModels;
using Xamarin.Forms;

namespace ChatUIXForms.Views
{
    public partial class ChatPage : ContentPage