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

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

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

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

Output

Tutorialwing Android Switch Output

Getting Started

We can define android Material Switch widget as below –

Android Switch is a two-state toggle widget that can select between two options (ON or OFF). The user can drag and drop thumb to select between two options or it can simply tap to toggle the state.

Now, how do we use Material Switch 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 Material Switch 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 Material Switch in Kotlin

Follow steps below to use Material Switch in newly created project –

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

  <resources>
      <string name="app_name">SwitchMaterial</string>
      <string name="off">OFF</string>
      <string name="on">ON</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">
  
      <com.google.android.material.switchmaterial.SwitchMaterial
          android:id="@+id/switch_ID"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:text="@string/off"
          app:layout_constraintBottom_toBottomOf="parent"
          app:layout_constraintLeft_toLeftOf="parent"
          app:layout_constraintRight_toRightOf="parent"
          app:layout_constraintTop_toTopOf="parent" />
  
  </androidx.constraintlayout.widget.ConstraintLayout>
  

  In activity_main.xml file, we have defined Switch widget. Now, we will access this Switch using kotlin file in the application.

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

  package com.tutorialwing.switchmaterial
  
  import androidx.appcompat.app.AppCompatActivity
  import android.os.Bundle
  import android.widget.Toast
  import com.tutorialwing.switchmaterial.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)
  
  		setCheckedChangeListener()
  	}
  
  	private fun setCheckedChangeListener() {
  		binding.switchID.setOnCheckedChangeListener { _, isChecked ->
  			val msg = getString(if (isChecked) R.string.on else R.string.off)
  			Toast.makeText(this@MainActivity, msg, Toast.LENGTH_SHORT).show()
  			binding.switchID.text = msg
  		}
  	}
  }
  

  In MainActivity.kt file, we have accessed Switch widget defined in xml file. Then, we have set a checked change listener to show a toast message whenever checked state is changed.

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

Tutorialwing Android Switch Output

Different Attributes of Material Switch in XML

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

Set Id of Material Switch

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 Material Switch using android:id attribute like below –

    <com.google.android.material.switchmaterial.SwitchMaterial
        android:id="@+id/materialSwitch_ID"
        />

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

Set Width of Material Switch

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

    <com.google.android.material.switchmaterial.SwitchMaterial
        android:id="@+id/materialSwitch_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 Material Switch Dynamically

Set Height of Material Switch

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

    <com.google.android.material.switchmaterial.SwitchMaterial
        android:id="@+id/materialSwitch_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 Material Switch Dynamically

Set Padding of Material Switch

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

    <com.google.android.material.switchmaterial.SwitchMaterial
        android:id="@+id/materialSwitch_ID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="10dp"
        />

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

Set Margin of Material Switch

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

    <com.google.android.material.switchmaterial.SwitchMaterial
        android:id="@+id/materialSwitch_ID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        />

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

Set Background of Material Switch

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

    <com.google.android.material.switchmaterial.SwitchMaterial
        android:id="@+id/materialSwitch_ID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="#ff0000"
        />

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

Set Visibility of Material Switch

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

    <com.google.android.material.switchmaterial.SwitchMaterial
        android:id="@+id/materialSwitch_ID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:visibility="gone"
        />

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

Set Text of Material Switch

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

    <com.google.android.material.switchmaterial.SwitchMaterial
        android:id="@+id/materialSwitch_ID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello Tutorialwing"
        />

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

Set Color of Text in Material Switch

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

    <com.google.android.material.switchmaterial.SwitchMaterial
        android:id="@+id/materialSwitch_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 Material Switch using android:textColor=”” attribute. Similarly, we can set any color using this attribute.
Learn to Set Color of Material Switch Dynamically

Set Gravity of Material Switch

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

    <com.google.android.material.switchmaterial.SwitchMaterial
        android:id="@+id/materialSwitch_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 Material Switch using android:gravity=”” attribute. Attribute value can be – “center_horizontal”, “center”, “center_vertical” etc.
Learn to Set Gravity of Material Switch Dynamically

Set Text in Uppercase, Lowercase

If we need to show text of Material Switch 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 –

    <com.google.android.material.switchmaterial.SwitchMaterial
        android:id="@+id/materialSwitch_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 Material Switch.

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,

    <com.google.android.material.switchmaterial.SwitchMaterial
        android:id="@+id/materialSwitch_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 Material Switch.

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 Material Switch.

Learn to Set Text in Uppercase or Lowercase Dynamically

Set Size of Text in Material Switch

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

    <com.google.android.material.switchmaterial.SwitchMaterial
        android:id="@+id/materialSwitch_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 Material Switch using android:textSize=”” attribute.
Learn to Set Size of Text of Material Switch Dynamically

Set Style (Bold/italic) of Text in Material Switch

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

    <com.google.android.material.switchmaterial.SwitchMaterial
        android:id="@+id/materialSwitch_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 Material Switch using android:textStyle=”” attribute. This attribute can take bold, italic or normal.
Learn to Set Style of Text of Material Switch Dynamically

Set Letter Spacing of Text in Material Switch

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

    <com.google.android.material.switchmaterial.SwitchMaterial
        android:id="@+id/materialSwitch_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 Material Switch using android:letterSpacing=”” attribute.
Learn to Set Letter Spacing of Text of Material Switch Dynamically

Set Typeface of Text in Material Switch

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

    <com.google.android.material.switchmaterial.SwitchMaterial
        android:id="@+id/materialSwitch_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 Material Switch using android:typeface=”” attribute. This attribute can take values – “sans”, “normal”, “monospace” or “normal”.
Learn to Set Typeface of Material Switch Dynamically

Set fontFamily of Text in Material Switch

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

    <com.google.android.material.switchmaterial.SwitchMaterial
        android:id="@+id/materialSwitch_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 Material Switch using android:fontFamily=”sans-serif” attribute.

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

Different Attributes of Android Material Switch Widget

Below are the various attributes that are used to customise android Material Switch Widget. However, you can check the complete list of attributes of Material Switch 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 Switch widget are –

Some of the popular attributes of android Switch widget inherited from Compound Button are –

Some of the popular attributes of android Switch inherited from TextView are –

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

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

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