Create EditText in Kotlin Programmatically

In this short code example in Kotlin I am going to share with you how to create an EditText programmatically and also how to:

Add the created EditText in a ConstraintLayout
Set hint text for the TextView
Set text color
Set EditText backgroundColor

Layout XML file for the EditText UI component

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/constraintLayout"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="appsdeveloperblog.kotlin.codeexamples.ButtonExample">

</android.support.constraint.ConstraintLayout>

Create EditText in Kotlin Programmatically. Source code.

package appsdeveloperblog.kotlin.codeexamples

import android.graphics.Color
import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.support.constraint.ConstraintLayout
import android.support.constraint.ConstraintSet
import android.widget.EditText

class EditTextExample : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_edit_text_example)
        val constraintLayout = findViewById(R.id.constraintLayout) as ConstraintLayout

        val editText = EditText(this)
        editText.hint="Type here"
        editText.setTextColor(Color.BLUE)
        editText.setBackgroundColor(Color.YELLOW)
        editText.layoutParams = ConstraintLayout.LayoutParams(0, ConstraintLayout.LayoutParams.MATCH_PARENT)

        constraintLayout.addView(editText)

        var constraintSet = ConstraintSet()
        constraintSet.clone(constraintLayout)
        constraintSet.connect(editText.id,ConstraintSet.RIGHT, ConstraintSet.PARENT_ID, ConstraintSet.RIGHT,16)
        constraintSet.connect(editText.id,ConstraintSet.LEFT, ConstraintSet.PARENT_ID, ConstraintSet.LEFT,16)
        constraintSet.applyTo(constraintLayout)


    }
}

The Kotlin code example above should create and add a new EditText UI Component to the view of your Android app. I have a few more similar code examples in Kotlin available in Kotlin category. So, if you are just starting with Kotlin and are looking for simple How to’s that page will help you find an example in Kotlin you are looking for.

Also, checkout the books and video courses available on Kotlin below. These resources will help you learn Kotlin and how to build mobile apps for Android with Kotlin much faster!