¿Cómo mostrar HTML en Textview junto con imágenes en Android?

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="colorPrimary">#0F9D58</color>
    <color name="colorPrimaryDark">#0F9D58</color>
    <color name="colorAccent">#03DAC5</color>
    <color name="Grey">#878585</color>
</resources>

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="16dp"
    tools:context=".MainActivity">
  
  
    <!-- Edittext to take input for this sample app,
          for real app you will not need this -->
    <EditText
        android:id="@+id/editor"
        android:layout_width="0dp"
        android:layout_height="40dp"
        app:layout_constraintEnd_toStartOf="@+id/display_html"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
  
    <!-- Button to trigger an event to display html/Rich text-->
    <Button
        android:id="@+id/display_html"
        android:layout_width="100dp"
        android:layout_height="50dp"
        android:text="Display Html"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
  
    <!-- Scroll View for smooth scrolling -->
    <ScrollView
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginTop="16dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/editor">
  
        <!-- Text View in which you will display the html after 
             processing the input-->
        <TextView
            android:id="@+id/html_viewer"
            android:layout_width="match_parent"
            android:layout_height="match_parent">
        </TextView>
          
    </ScrollView>
  
</androidx.constraintlayout.widget.ConstraintLayout>

import android.content.res.Resources
import android.graphics.Bitmap
import android.graphics.Canvas
import android.graphics.drawable.BitmapDrawable
import android.graphics.drawable.Drawable
import android.text.Html
import android.widget.TextView
import com.squareup.picasso.Picasso
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.GlobalScope
import kotlinx.coroutines.launch
import kotlinx.coroutines.withContext
  
// Class to download Images which extends [Html.ImageGetter]
class ImageGetter(
    private val res: Resources,
    private val htmlTextView: TextView
) : Html.ImageGetter {
  
    // Function needs to overridden when extending [Html.ImageGetter] ,
    // which will download the image
    override fun getDrawable(url: String): Drawable {
        val holder = BitmapDrawablePlaceHolder(res, null)
  
        // Coroutine Scope to download image in Background
        GlobalScope.launch(Dispatchers.IO) {
            runCatching {
  
                // downloading image in bitmap format using [Picasso] Library
                val bitmap = Picasso.get().load(url).get()
                val drawable = BitmapDrawable(res, bitmap)
  
                // To make sure Images don't go out of screen , Setting width less
                // than screen width, You can change image size if you want
                val width = getScreenWidth() - 150
  
                // Images may stretch out if you will only resize width,
                // hence resize height to according to aspect ratio
                val aspectRatio: Float =
                    (drawable.intrinsicWidth.toFloat()) / (drawable.intrinsicHeight.toFloat())
                val height = width / aspectRatio
                drawable.setBounds(10, 20, width, height.toInt())
                holder.setDrawable(drawable)
                holder.setBounds(10, 20, width, height.toInt())
                withContext(Dispatchers.Main) {
                    htmlTextView.text = htmlTextView.text
                }
            }
        }
        return holder
    }
  
    // Actually Putting images
    internal class BitmapDrawablePlaceHolder(res: Resources, bitmap: Bitmap?) :
        BitmapDrawable(res, bitmap) {
        private var drawable: Drawable? = null
  
        override fun draw(canvas: Canvas) {
            drawable?.run { draw(canvas) }
        }
  
        fun setDrawable(drawable: Drawable) {
            this.drawable = drawable
        }
    }
  
    // Function to get screenWidth used above
    fun getScreenWidth() =
        Resources.getSystem().displayMetrics.widthPixels
}

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
  
        // Click Listener to listener button click events.
        // display_html is button id from activity_main.xml 
        // You don't need to get reference to it because kotlin 
        // provides synthetic import and 
        // We are gonna use for the same for rest of Views
        display_html.setOnClickListener {
            if (editor.text.isNotEmpty()) {
                displayHtml(editor.text.toString())
            }
        }
    }
}