In this article, we will learn how to create android TextInputLayout programmatically in Kotlin. We will go through various steps that explains how to create TextInputLayout and add it in kotlin file, use different attributes to customise it etc. in any android application. For example, how to set text in TextInputLayout programmatically, how to set id of TextInputLayout, how to capitalise text of TextInputLayout dynamically etc. We will get answer to all such questions in this post.

Learn to use Different Attributes of TextInputLayout in XML File to Customize it.

Getting Started

We can define android TextInputLayout widget as below –

TextInputLayout is a layout that wraps EditText (or descendant) to show floating level when the hint is hidden due to user inputting text.

Now, how do we use TextInputLayout in android application ?

Before we move ahead, we need to setup for viewBinding to access TextInputLayout in Kotlin file without using findViewById() method.

Setup ViewBinding

Add viewBinding true in app/build.gradle file.

 
 android { 
 	// OTHER CODE... 
 	buildFeatures { 
 		viewBinding true 
 	} 
 } 
 

Now, set content in activity using view binding.
Open MainActivity.kt file and write below code in it.

 
 class MainActivity : AppCompatActivity() { 
 	
 	private lateinit var binding: ActivityMainBinding 
 	
 	override fun onCreate(savedInstanceState: Bundle?) { 
 		super.onCreate(savedInstanceState) 
 		binding = ActivityMainBinding.inflate(layoutInflater) 
 		val view = binding.root 
 		setContentView(view) 
 	} 
 } 
 

Now, we can access view in Kotlin file without using findViewById() method.

Since we have a new project, we will modify the xml and class file to use TextInputLayout programmatically in kotlin. Please follow the steps below.

2. Modify Values Folder

Open res/values/strings.xml file. Add below code into it.

<resources>
    <string name="app_name">DynamicTextInputLayout</string>
    <string name="username">Enter Username</string>
    <string name="password">Enter Password</string>
    <string name="submit">Submit</string>
</resources>

Other values folders have not been changed. So, we are not going to mention it here.

3. Modify Layout Folder

Open res/layout/activity_main.xml file. Add below code into it.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="30dp">

    <LinearLayout
        android:id="@+id/rootContainer"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:padding="30dp">

    </LinearLayout>

    <Button
        android:id="@+id/submit"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginTop="10dp"
        android:paddingLeft="20dp"
        android:paddingRight="20dp"
        android:text="@string/submit" />

</LinearLayout>

Note that LinearLayout has id rootContainer. In Kotlin file, we will create TextInputLayout Dynamically and add it into this LinearLayout having id rootContainer.

4. Create Android TextInputLayout programmatically in Kotlin

Open src/main/java/com.tutorialwing.dynamictextinputlayout/MainActivity.kt file. Then, add below code into it.

package com.tutorialwing.dynamictextinputlayout

import android.os.Bundle
import android.text.InputType
import android.widget.LinearLayout
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import com.google.android.material.textfield.TextInputEditText
import com.google.android.material.textfield.TextInputLayout
import com.tutorialwing.dynamictextinputlayout.databinding.ActivityMainBinding


class MainActivity : AppCompatActivity() {

	private lateinit var binding: ActivityMainBinding

	override fun onCreate(savedInstanceState: Bundle?) {
		super.onCreate(savedInstanceState)

		binding = ActivityMainBinding.inflate(layoutInflater)
		setContentView(binding.root)

		setupTextInputLayout()
	}

	private fun setupTextInputLayout() {
		val tInput1 = addTextInputLayout("Username")
		val tInput2 = addTextInputLayout("Password", true)
		binding.rootContainer.addView(tInput1)
		binding.rootContainer.addView(tInput2)

		binding.submit.setOnClickListener {
			val username = tInput1.editText?.text.toString()
			val password = tInput2.editText?.text.toString()

			Toast.makeText(
				applicationContext,
				"Username: $username, Password: $password", Toast.LENGTH_SHORT
			).show()
		}
	}

	private fun addTextInputLayout(hintText: String, isPassword: Boolean = false): TextInputLayout {
		val layoutParams = LinearLayout.LayoutParams(
			LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT
		)
		val textInputLayout = TextInputLayout(
			this,
			null,
			R.style.Widget_MaterialComponents_TextInputLayout_OutlinedBox
		)
		textInputLayout.hint = hintText
		textInputLayout.layoutParams = layoutParams

		val params = LinearLayout.LayoutParams(
			LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT
		)
		val textInputEditText = TextInputEditText(this)
		if (isPassword)
			textInputEditText.inputType = InputType.TYPE_TEXT_VARIATION_PASSWORD
		textInputEditText.layoutParams = params

		textInputLayout.addView(textInputEditText)
		return textInputLayout
	}
}

Finally, when you run the application, you will get output as shown above.

Now, Let’s check how to use different attributes of TextInputLayout to customize it dynamically –

Set Id of TextInputLayout

Follow steps below to set id of TextInputLayout programmatically –

• Create ids.xml file in res/values folder. Then, add below code into it –

  <?xml version="1.0" encoding="utf-8"?>
  <resources>
      <item type="id" name="textInputLayout_ID" />
  </resources>
  

• Now, we can set id of TextInputLayout dynamically, in MainActivity.kt file, as –

  textInputLayout.id = R.id.textInputLayout_ID  // TextInputLayout
  

  Here, we have set id of TextInputLayout using property access syntax – textInputLayout.id

Learn to Set ID of TextInputLayout Using XML Attribute

Set Width and Height of TextInputLayout

We use layoutParams to set width and height of any View programmatically. In this article, we have added TextInputLayout in LinearLayout. So, we will define LayoutParams as below –

textInputLayout.layoutParams = LinearLayout.LayoutParams(
	ViewGroup.LayoutParams.WRAP_CONTENT,
	ViewGroup.LayoutParams.WRAP_CONTENT
)

Here, we have set width and height as WRAP_CONTENT. Some of possible values for width and height are –

• WRAP_CONTENT: Sets value of width or height depending on text inside it.
• MATCH_PARENT: Sets value of width of height depending on width or height of parent layout . i.e. width or height of TextInputLayout will be same as width or height of parent layout.
• Fixed Value: Sets width or height as per value provided.

Learn to Set Width or Height of TextInputLayout Using XML Attribute

Set Padding of TextInputLayout

Follow steps below to set padding of TextInputLayout Dynamically –

• If there is no dimens.xml file, create dimens.xml file in res/values folder. Then, add below code in it –

  <?xml version="1.0" encoding="utf-8"?>
  <resources>
      <dimen name="text_padding">16dp</dimen>
  </resources>
  

• Now, we can set padding of TextInputLayout dynamically, in MainActivity.kt file, as –

  val padding = resources.getDimension(R.dimen.text_padding).toInt()
  textInputLayout.setPadding(padding, padding, padding, padding)
  

  Here, we have accessed dimension defined in dimens.xml using getDimension() method. Then, set padding of TextInputLayout using setPadding() method.

Learn to Set Padding of TextInputLayout Using XML Attribute

Set Margin of TextInputLayout

Follow steps below to set margin of TextInputLayout Dynamically –

• If there is no dimens.xml file, create dimens.xml file in res/values folder. Then, add below code in it –

  <?xml version="1.0" encoding="utf-8"?>
  <resources>
      <dimen name="text_margin">16dp</dimen>
  </resources>
  

• Now, we can set margin of TextInputLayout dynamically, in MainActivity.kt file, as –

  val margin = resources.getDimension(R.dimen.text_margin).toInt()
  val layoutParams = LinearLayout.LayoutParams(
  	ViewGroup.LayoutParams.WRAP_CONTENT,
  	ViewGroup.LayoutParams.WRAP_CONTENT
  )
  layoutParams.setMargins(margin, margin, margin, margin)
  textInputLayout.layoutParams = layoutParams
  

  Here, we have accessed dimension defined in dimens.xml using getDimension() method. Then, we have defined layoutParams, set margin to layoutParams. After that, set layoutParams to TextInputLayout.

Learn to Set Margin of TextInputLayout Using XML Attribute

Set Background of TextInputLayout

Follow steps below to set background of TextInputLayout programmatically –

• If there is no colors.xml file, create colors.xml file in res/values folder. Then, add below code in it –

  <?xml version="1.0" encoding="utf-8"?>
  <resources>
      <color name="purple_200">#FFBB86FC</color>
  </resources>
  

• Now, we can set background of TextInputLayout dynamically, in MainActivity.kt file, as –

  val color = ContextCompat.getColor(this, R.color.purple_200)
  textInputLayout.setBackgroundColor(color)
  

  Here, we used setBackgroundColor() method to set background color in textInputLayout.

Learn to Set Background of TextInputLayout Using XML Attribute

Set Visibility of TextInputLayout

We can set visibility of TextInputLayout programmatically as –

textInputLayout.visibility = View.VISIBLE

Here, we have set visibility of TextInputLayout using textInputLayout.visibility attribute. Visibility can be of three types – gone, visible and invisible.
Learn to Set Visibility of TextInputLayout Using XML Attribute

That’s end of tutorial on TextInputLayout Programmatically in Kotlin With Example.