Create An Android CheckedTextview Programmatically in Kotlin

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

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

Output

Tutorialwing Android Dynamic CheckedTextView Output Android CheckedTextView programmatically in kotlin

Tutorialwing Android Dynamic CheckedTextView Output

Getting Started

We can define android Dynamic CheckedTextView widget as below –

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

Now, how do we use Dynamic CheckedTextView in android application ?

Creating New Project

Follow steps below to create any android project in Kotlin –

Step Description
1. Open Android Studio (Ignore if already done).
2. Go to File => New => New Project. This will open a new window. Then, under Phone and Tablet section, select Empty Activity. Then, click Next.
3. In next screen, select project name as DynamicCheckedTextView. Then, fill other required details.
4. Then, clicking on Finish button creates new project.

Newbie in Android ?
Some very important concepts (Recommended to learn before you move ahead)

Before we move ahead, we need to setup for viewBinding to access Dynamic CheckedTextView 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 Dynamic CheckedTextView 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">DynamicCheckedTextView</string>
    <string name="checkedTextView">CheckedTextView</string>
    <string name="checked">checked</string>
    <string name="unchecked">unchecked</string>
    <string name="pre_msg">CheckedTextView is</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
    android:id="@+id/rootLayout"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical">

</LinearLayout>

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

4. Create Android Dynamic CheckedTextView programmatically in Kotlin

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

package com.tutorialwing.dynamiccheckedtextview

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.ViewGroup
import android.widget.CheckedTextView
import android.widget.LinearLayout
import android.widget.Toast
import com.tutorialwing.dynamiccheckedtextview.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)

		addCheckedTextView()
	}

	private fun addCheckedTextView() {
		val checkedTextView = CheckedTextView(this)
		checkedTextView.layoutParams = LinearLayout.LayoutParams(
			ViewGroup.LayoutParams.WRAP_CONTENT,
			ViewGroup.LayoutParams.WRAP_CONTENT
		)
		checkedTextView.setText(R.string.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) + " " + if (checkedTextView.isChecked) getString(R.string.checked) else getString(
					R.string.unchecked
				)
			Toast.makeText(this@MainActivity, msg, Toast.LENGTH_SHORT).show()
		}

		// Add Checkbox to LinearLayout
		binding.rootLayout.addView(checkedTextView)
	}
}

In MainActivity.kt file, we have create checkedTextview programmatically in kotlin file. Then, we set some width, height, text etc.. Notice how we use different methods to set text, width or height. Similarly, you can use such methods to customise this widget. After that, we set click listener to show toast message whenever checkedTextview widget is clicked.

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

Tutorialwing Android Dynamic CheckedTextView Output Android CheckedTextView programmatically in kotlin

Tutorialwing Android Dynamic CheckedTextView Output

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

Set Id of CheckedTextView

Follow steps below to set id of Dynamic CheckedTextView 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="checkedTextView_ID" />
    </resources>
    
  • Now, we can set id of Dynamic CheckedTextView dynamically, in MainActivity.kt file, as –

    checkedTextView.id = R.id.checkedTextView_ID  // CheckedTextView
    

    Here, we have set id of Dynamic CheckedTextView using property access syntax – checkedTextView.id

Learn to Set ID of Dynamic CheckedTextView Using XML Attribute

Set Width and Height of CheckedTextView

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

checkedTextView.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 Dynamic CheckedTextView 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 Dynamic CheckedTextView Using XML Attribute

Set Padding of CheckedTextView

Follow steps below to set padding of Dynamic CheckedTextView 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 Dynamic CheckedTextView dynamically, in MainActivity.kt file, as –
    val padding = resources.getDimension(R.dimen.text_padding).toInt()
    checkedTextView.setPadding(padding, padding, padding, padding)
    

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

Learn to Set Padding of Dynamic CheckedTextView Using XML Attribute

Set Margin of CheckedTextView

Follow steps below to set margin of Dynamic CheckedTextView 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 Dynamic CheckedTextView 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)
    checkedTextView.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 CheckedTextView.

Learn to Set Margin of Dynamic CheckedTextView Using XML Attribute

Set Background of CheckedTextView

Follow steps below to set background of Dynamic CheckedTextView 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 Dynamic CheckedTextView dynamically, in MainActivity.kt file, as –
    val color = ContextCompat.getColor(this, R.color.purple_200)
    checkedTextView.setBackgroundColor(color)
    

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

Learn to Set Background of Dynamic CheckedTextView Using XML Attribute

Set Visibility of CheckedTextView

We can set visibility of Dynamic CheckedTextView programmatically as –

checkedTextView.visibility = View.VISIBLE

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

Set Text of CheckedTextView

Follow steps below to set text of Dynamic CheckedTextView programmatically –

  • If there is no strings.xml file, create strings.xml file in res/values folder. Then, add below code in it –
    <resources>
        <string name="click_on_me">Click on me</string>
    </resources>
    
  • Now, we can set text of Dynamic CheckedTextView dynamically, in MainActivity.kt file, as –
    checkedTextView.text = getString(R.string.click_on_me)
    

    Here, we used checkedTextView.text to set text in checkedTextView.

Learn to Set Text of Dynamic CheckedTextView Using XML Attribute

Set Color of Text of CheckedTextView

Follow steps below to set color of text of Dynamic CheckedTextView programmatically in Kotlin –

  • 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="black">#FF000000</color>
    </resources>
    
  • Now, we can set color of text of Dynamic CheckedTextView dynamically, in MainActivity.kt file, as –
    val textColor = ContextCompat.getColor(this, R.color.black)
    checkedTextView.setTextColor(textColor)
    

    Here, we used setTextColor() method to set color of Dynamic CheckedTextView of checkedTextView.

Learn to Set Color of Dynamic CheckedTextView Using XML Attribute

Set Gravity of CheckedTextView

We can set gravity of text of Dynamic CheckedTextView programmatically in Kotlin as –

checkedTextView.gravity = Gravity.CENTER

Here, we have set gravity of Dynamic CheckedTextView as center. So, all the text of Dynamic CheckedTextView will be center aligned.
We can also apply multiple gravity values as –

checkedTextView.gravity = Gravity.CENTER_HORIZONTAL or Gravity.BOTTOM

Here, we have applied multiple gravity values, in Kotlin, to CheckedTextView. In above case, text will be aligned as horizontally centered to bottom.
Learn to Set Margin of Dynamic CheckedTextView Using XML Attribute

Set Text in Uppercase or Lowercase

Follow steps below to set text in uppercase or lowercase programmatically as –

  • Set Text in Uppercase

    We use checkedTextView.isAllCaps attributes to set text in uppercase or normal. If it is true, text will be set in uppercase.

    checkedTextView.text = "Hello Tutorialwing"
    checkedTextView.isAllCaps = true
    

    In Above case, “Hello Tutorialwing” will be set in Uppercase to CheckedTextView. So, text will be “HELLO TUTORIALWING”.

  • By default, isAllCaps is false. So, whatever is written, text will be set as it is. For example,

    checkedTextView.text = "Hello Tutorialwing"
    checkedTextView.isAllCaps = false. // By default it is false. Written here for example.
    

    Above code will set text, “Hello Tutorialwing”, to Dynamic CheckedTextView without changing it to Uppercase.

    Actually, if isAllCaps is false, text is set as it is. It neither changes to uppercase nor lowercase.

    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 Using XML Attribute

Set Size of Text in CheckedTextView

Follow steps below to set size of Dynamic CheckedTextView programmatically using checkedTextView.textSize attribute –

  • Open res/values/dimens.xml file. Then, add below font-size in it –
    <dimen name="text_size">16sp</dimen>
    
  • Now, using checkedTextView.textSize attribute, we can set size of text dynamically as –

    checkedTextView.textSize = resources.getDimension(R.dimen.text_margin)
    

Learn to Set Size of Text in Dynamic CheckedTextView Using XML Attribute

Set Style (Bold/italic) of Text in CheckedTextView

We can set textStyle of Dynamic CheckedTextView programmatically as –

checkedTextView.typeface = Typeface.DEFAULT_BOLD;

In above case, we have set textStyle as bold. So, text of Dynamic CheckedTextView will be displayed as bold letters.

If we want to preserve previous textStyle too, we can do it as –

checkedTextView.setTypeface(checkedTextView.typeface, Typeface.BOLD);

Learn to Set Typeface of Dynamic CheckedTextView Using XML Attribute

Set Letter Spacing of Text in CheckedTextView

Follow steps below to set letter spacing of Dynamic CheckedTextView programmatically –

  • Open res/values/dimens.xml file. Then, add below dimension in it –
    <dimen name="text_letter_spacing">1dp</dimen>
    
  • We use checkedTextView.letterSpacing attribute to set letter spacing of Dynamic CheckedTextView as below –

    checkedTextView.letterSpacing = resources.getDimension(R.dimen.text_letter_spacing)
    

Learn to Set Letter Spacing of Dynamic CheckedTextView Using XML Attribute

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