widget_toast.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    ...
    android:id="@+id/backgroundFrameLayout"
    android:padding="16dp">

  <TextView
      ...
      android:id="@+id/titleTextView"
      android:drawableStart="@drawable/correct"
      tools:text="This is the message"/>
</FrameLayout>