In this article, we will learn about android CheckedTextView using Kotlin. We will go through various example that demonstrates how to use different attributes of CheckedTextView. For example, …..

In this article, we will get answer to questions like –

• What is CheckedTextView?
• Why should we consider CheckedTextView while designing ui for any app?
• What are possibilities using CheckedTextView while designing ui? etc.

Let’s have a quick demo of things we want to cover in this tutorial –

Output

Tutorialwing Android CheckedTextView Output

Getting Started

We can define android CheckedTextView widget as below –

Android CheckedTextview is a subclass of textView that has checkable interface and displays.

Now, how do we use CheckedTextView in android application ?

Creating New Project

At first, we will create an application.
So, follow steps below to create any android project in Kotlin –

Newbie in Android ?

Some very important concepts (Recommended to learn before you move ahead)

• Install Android Studio
• Create New Project in Android Studio
• Android Project Structure
• Run / Debug / Test Android App

Before we move ahead, we need to setup for viewBinding to access Android CheckedTextView Using 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.

Using CheckedTextView in Kotlin

Follow steps below to use CheckedTextView in newly created project –

• Open res/values/strings.xml file. Then, add below code into it –

  <resources>
      <string name="app_name">CheckedTextView</string>
      <string name="pre_msg">CheckedTextView is</string>
      <string name="checked">checked</string>
      <string name="unchecked">unchecked</string>
      <string name="checkedTextView">CheckedTextView</string>
  </resources>
  

• Open res/layout/activity_main.xml file. Then, add below code in it –

  <?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=".MainActivity">
  
      <CheckedTextView
          android:id="@+id/checkedTextView"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:checked="true"
          android:gravity="center"
          android:text="@string/checkedTextView"
          app:layout_constraintBottom_toBottomOf="parent"
          app:layout_constraintLeft_toLeftOf="parent"
          app:layout_constraintRight_toRightOf="parent"
          app:layout_constraintTop_toTopOf="parent" />
  
  </androidx.constraintlayout.widget.ConstraintLayout>
  

• We can also access it in Kotlin File, MainActivity.kt, as below –

  package com.tutorialwing.checkedtextview
  
  import androidx.appcompat.app.AppCompatActivity
  import android.os.Bundle
  import android.widget.Toast
  import com.tutorialwing.checkedtextview.databinding.ActivityMainBinding
  
  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)
  
  		setupCheckedTextView()
  	}
  
  	private fun setupCheckedTextView() {
  		val checkedTextView = binding.checkedTextView
  		checkedTextView.isChecked = false
  		checkedTextView.setCheckMarkDrawable(android.R.drawable.checkbox_off_background)
  
  		checkedTextView.setOnClickListener {
  			checkedTextView.isChecked = !checkedTextView.isChecked
  			checkedTextView.setCheckMarkDrawable(if (checkedTextView.isChecked) android.R.drawable.checkbox_on_background else android.R.drawable.checkbox_off_background)
  
  			val msg =
  				getString(R.string.pre_msg) + " " + getString(if (checkedTextView.isChecked) R.string.checked else R.string.unchecked)
  			Toast.makeText(this@MainActivity, msg, Toast.LENGTH_SHORT).show()
  		}
  	}
  }
  

  In MainActivity.kt file, we have accessed CheckedTextView widget. Then, we have set a listener to show a toast message when CheckedTextview is checked / unchecked.

Now, run the application. We will get output as below –

Tutorialwing Android CheckedTextView Output

Different Attributes of CheckedTextView in XML

Now, we will see how to use different attributes of Android CheckedTextView using Kotlin to customise it –

Set Id of CheckedTextView

Many a time, we need id of View to access it in kotlin file or create ui relative to that view in xml file. So, we can set id of CheckedTextView using android:id attribute like below –

    <CheckedTextView
        android:id="@+id/checkedTextView_ID"
        />

Here, we have set id of CheckedTextView as checkedTextView_ID using android:id=”” attribute. So, if we need to reference this CheckedTextView, we need to use this id – checkedTextView_ID.
Learn to Set ID of CheckedTextView Dynamically

Set Width of CheckedTextView

We use android:layout_width=”” attribute to set width of CheckedTextView.
We can do it as below –

    <CheckedTextView
        android:id="@+id/checkedTextView_ID"
        android:layout_width="wrap_content"
        />

Width can be either “MATCH_PARENT” or “WRAP_CONTENT” or any fixed value (like 20dp, 30dp etc.).
Learn to Set Width of CheckedTextView Dynamically

Set Height of CheckedTextView

We use android:layout_height=”” attribute to set height of CheckedTextView.
We can do it as below –

    <CheckedTextView
        android:id="@+id/checkedTextView_ID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        />

Height can be either “MATCH_PARENT” or “WRAP_CONTENT” or any fixed value.
Learn to Set Height of CheckedTextView Dynamically

Set Padding of CheckedTextView

We use android:padding=”” attribute to set padding of CheckedTextView.
We can do it as below –

    <CheckedTextView
        android:id="@+id/checkedTextView_ID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="10dp"
        />

Here, we have set padding of 10dp in CheckedTextView using android:padding=”” attribute.
Learn to Set Padding of CheckedTextView Dynamically

Set Margin of CheckedTextView

We use android:layout_margin=”” attribute to set margin of CheckedTextView.
We can do it as below –

    <CheckedTextView
        android:id="@+id/checkedTextView_ID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        />

Here, we have set margin of 10dp in CheckedTextView using android:layout_margin=”” attribute.
Learn to Set Margin of CheckedTextView Dynamically

Set Background of CheckedTextView

We use android:background=”” attribute to set background of CheckedTextView.
We can do it as below –

    <CheckedTextView
        android:id="@+id/checkedTextView_ID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="#ff0000"
        />

Here, we have set background of color #ff0000 in CheckedTextView using android:background=”” attribute.
Learn to Set Background of CheckedTextView Dynamically

Set Visibility of CheckedTextView

We use android:visibility=”” attribute to set visibility of CheckedTextView.
We can do it as below –

    <CheckedTextView
        android:id="@+id/checkedTextView_ID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:visibility="gone"
        />

Here, we have set visibility of CheckedTextView using android:visiblity=”” attribute. Visibility can be of three types – gone, visible and invisible
Learn to Set Visibility of CheckedTextView Dynamically

Set Text of CheckedTextView

We use android:text=”” attribute to set text of CheckedTextView.
We can do it as below –

    <CheckedTextView
        android:id="@+id/checkedTextView_ID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello Tutorialwing"
        />

Here, we have set text (“Hello Tutorialwing”) in CheckedTextView using android:text=”” attribute.
Similarly, we can set any text using this attribute.
Learn to Set Text of CheckedTextView Dynamically

Set Color of Text in CheckedTextView

We use android:textColor=”” attribute to set color of text in CheckedTextView.
We can do it as below –

    <CheckedTextView
        android:id="@+id/checkedTextView_ID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello Tutorialwing"
        android:textColor="#ffffff"     
        />

Here, we have set color (#ffffff i.e. white) of text (“Hello Tutorialwing”) in CheckedTextView using android:textColor=”” attribute. Similarly, we can set any color using this attribute.
Learn to Set Color of CheckedTextView Dynamically

Set Gravity of CheckedTextView

We use android:gravity=”” attribute to set gravity of text in CheckedTextView.
We can do it as below –

    <CheckedTextView
        android:id="@+id/checkedTextView_ID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello Tutorialwing"
        android:gravity="center_horizontal"
        />

Here, we have set gravity of text in CheckedTextView using android:gravity=”” attribute. Attribute value can be – “center_horizontal”, “center”, “center_vertical” etc.
Learn to Set Gravity of CheckedTextView Dynamically

Set Text in Uppercase, Lowercase

If we need to show text of CheckedTextView in uppercase or lowercase etc.

Set text in uppercase

We can use android:textAllCaps=”true” attribute to set text in uppercase. We can do it as below –

    <CheckedTextView
        android:id="@+id/checkedTextView_ID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello Tutorialwing"
        android:textAllCaps="true"
        />

Attribute android:textAllCaps=”true” sets text in uppercase. So, HELLO TUTORIALWING is set in CheckedTextView.

By default, false is set in this attribute. So, Whatever value is written in android:text=”” attribute, it will be set as it is. For example,

    <CheckedTextView
        android:id="@+id/checkedTextView_ID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello Tutorialwing"
        android:textAllCaps="false"
        />

Above code will set Hello Tutorialwing to CheckedTextView.

How do we set text in lowercase?

Answer –

• In xml file – write all the text in lowercase.
• In kotlin file – take text as string. Then, convert it in lowercase. Then, set it to CheckedTextView.

Learn to Set Text in Uppercase or Lowercase Dynamically

Set Size of Text in CheckedTextView

We use android:textSize=”” attribute to set size of text in CheckedTextView.
We can do it as below –

    <CheckedTextView
        android:id="@+id/checkedTextView_ID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello Tutorialwing"
        android:textSize="20sp"
        />

Here, we have set size of text in CheckedTextView using android:textSize=”” attribute.
Learn to Set Size of Text of CheckedTextView Dynamically

Set Style (Bold/italic) of Text in CheckedTextView

We use android:textStyle=”” attribute to set style (bold, italic etc.) of text in CheckedTextView.
We can do it as below –

    <CheckedTextView
        android:id="@+id/checkedTextView_ID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello Tutorialwing"
        android:textStyle="bold"
        />

Here, we have set style of text in CheckedTextView using android:textStyle=”” attribute. This attribute can take bold, italic or normal.
Learn to Set Style of Text of CheckedTextView Dynamically

Set Letter Spacing of Text in CheckedTextView

We use android:letterSpacing=”” attribute to set spacing between letters of text in CheckedTextView.
We can do it as below –

    <CheckedTextView
        android:id="@+id/checkedTextView_ID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello Tutorialwing"
        android:letterSpacing="1"
        />

Here, we have set spacing between letters of text in CheckedTextView using android:letterSpacing=”” attribute.
Learn to Set Letter Spacing of Text of CheckedTextView Dynamically

Set Typeface of Text in CheckedTextView

We use android:typeface=”” attribute to set typeface in CheckedTextView.
We can do it as below –

    <CheckedTextView
        android:id="@+id/checkedTextView_ID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello Tutorialwing"
        android:typeface="sans"
        />

Here, we have set typeface of text in CheckedTextView using android:typeface=”” attribute. This attribute can take values – “sans”, “normal”, “monospace” or “normal”.
Learn to Set Typeface of CheckedTextView Dynamically

Set fontFamily of Text in CheckedTextView

We use android:fontFamily=”” attribute to set fontFamily of text in CheckedTextView.
We can do it as below –

    <CheckedTextView
        android:id="@+id/checkedTextView_ID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello Tutorialwing"
        android:fontFamily="sans-serif"
        />

Here, we have set fontFamily (Here, sans-serif) of text in CheckedTextView using android:fontFamily=”sans-serif” attribute.

Till now, we have see how to use android CheckedTextView using Kotlin. We have also gone through different attributes of CheckedTextView to perform certain task. Let’s have a look at list of such attributes and it’s related task.

Different Attributes of Android CheckedTextView Widget

Below are the various attributes that are used to customise android CheckedTextView Widget. However, you can check the complete list of attributes of CheckedTextView in it’s official documentation site. Here, we are going to list some of the important attributes of this widget –

Some of the popular attributes of checkedTextview are –

Some of the popular attributes of android CheckedTextview inherited from Textview are –

Some of the popular attributes of android checkedTextview inherited from View are –

We have seen different attributes of CheckedTextView and how to use it. If you wish to visit post to learn more about it

Thus, we have seen what is CheckedTextView, how can we use android CheckedTextView using Kotlin ? etc. We also went through different attributes of android CheckedTextView.