Android Choice Chip Using Kotlin With Example

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

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

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

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

Output

Tutorialwing Android Kotlin Choice Chip Using Kotlin With Example

Getting Started

We can define android Choice Chip widget as below –

Choice chip provides us a way to select one or more choices from a set of choice list. It is good alternative of toggle button, radio button or single select menus.

Now, how do we use Choice Chip in android application ?

Creating New Project

At first, we will create an application.
So, 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 ChipChoice. 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 Android Choice Chip 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 Choice Chip in Kotlin

Follow steps below to use Choice Chip in newly created project –

  • Open res/values/strings.xml file. Then, add below code into it. 
    <resources>
    <string name="app_name">ChipChoice</string>
    <string name="select_type">Select type</string>
    <string name="extra_soft">Extra Soft</string>
    <string name="soft">Soft</string>
    <string name="medium">Medium</string>
    <string name="hard">Hard</string>
    <string name="extra_hard">Extra Hard</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"
    android:padding="10dp"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/label"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="20dp"
        android:text="@string/select_type"
        android:textSize="16sp"
        android:textStyle="bold"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <com.google.android.material.chip.ChipGroup
        android:id="@+id/chipGroup"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/label"
        app:singleLine="false">

        <com.google.android.material.chip.Chip
            android:id="@+id/chip1"
            style="@style/Widget.MaterialComponents.Chip.Choice"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/extra_soft" />

        <com.google.android.material.chip.Chip
            android:id="@+id/chip2"
            style="@style/Widget.MaterialComponents.Chip.Choice"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/soft" />

        <com.google.android.material.chip.Chip
            android:id="@+id/chip3"
            style="@style/Widget.MaterialComponents.Chip.Choice"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/medium" />

        <com.google.android.material.chip.Chip
            android:id="@+id/chip4"
            style="@style/Widget.MaterialComponents.Chip.Choice"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/hard" />

        <com.google.android.material.chip.Chip
            android:id="@+id/chip5"
            style="@style/Widget.MaterialComponents.Chip.Choice"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/extra_hard" />

    </com.google.android.material.chip.ChipGroup>

</androidx.constraintlayout.widget.ConstraintLayout>
  • We can also access it in Kotlin File, MainActivity.kt, as below – 

    package com.tutorialwing.chipchoice

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import com.tutorialwing.chipchoice.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)
	}
}

Now, run the application. We will get output as below –
Tutorialwing Android Kotlin Choice Chip Using Kotlin With Example

Different Attributes of Choice Chip in XML

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

Set Id of Choice Chip

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 Choice Chip using android:id attribute like below – 

    <com.google.android.material.chip.Chip
        android:id="@+id/choiceChip_ID"
        />

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

Set Width of Choice Chip

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

    <com.google.android.material.chip.Chip
        android:id="@+id/choiceChip_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 Choice Chip Dynamically

Set Height of Choice Chip

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

    <com.google.android.material.chip.Chip
        android:id="@+id/choiceChip_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 Choice Chip Dynamically

Set Padding of Choice Chip

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

    <com.google.android.material.chip.Chip
        android:id="@+id/choiceChip_ID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="10dp"
        />

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

Set Margin of Choice Chip

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

    <com.google.android.material.chip.Chip
        android:id="@+id/choiceChip_ID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        />

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

Set Background of Choice Chip

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

    <com.google.android.material.chip.Chip
        android:id="@+id/choiceChip_ID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="#ff0000"
        />

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

Set Visibility of Choice Chip

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

    <com.google.android.material.chip.Chip
        android:id="@+id/choiceChip_ID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:visibility="gone"
        />

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

Different Attributes of Android Choice Chip Widget

Checkout Different Attributes of Choice Chip

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

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

Recommended Posts

Leave a Reply