Show Error on the Tip of the Android EditText

EditText is used to take in Android user’s input. Showing error such as mis-matched password, wrong username is a must-have feature in this progress.

This is how to show error on the tip of an EditText.

<?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"
    tools:context=".product.ProductListFragment"
    >
    
    <EditText
    android:id="@+id/etKeyword"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_marginStart="16dp"
    android:layout_marginTop="8dp"
    android:layout_marginEnd="16dp"
    android:ems="10"
    android:inputType="text"
    android:hint="@string/keyword"
    app:layout_constraintEnd_toStartOf="@+id/btnSearch"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent" />
    <ImageButton
        android:id="@+id/btnSearch"
        android:layout_width="@dimen/btn_search_width"
        android:layout_height="@dimen/btn_search_height"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="16dp"
        android:src="@android:drawable/ic_menu_search"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

btnSearch.setOnClickListener {
            val keyword = etKeyword.text.toString()
            if(keyword.length < 3){
                etKeyword.error  = "Keyword should contain at least 3 characters"
            } else {
                searchProductsByKeyword(keyword)
            }
        }