Android Input Chip Using Kotlin With Example

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

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

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

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

Output

Tutorialwing Android Input Chip Using Kotlin With Example

Getting Started

We can define android Input Chip widget as below –

Android Chips are compact elements that are used to represent an attribute, text, entity or action. They allow users to enter information, select a choice, filter component, or trigger an action.

Now, how do we use Input 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 ChipInput. 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 Input 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 Input Chip in Kotlin

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

  • Open res/values/strings.xml file. Then, add below code into it. 
    <resources>
    <string name="app_name">ChipInput</string>
    <string name="india">India</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.chip.Chip
        android:id="@+id/chip1"
        style="@style/Widget.MaterialComponents.Chip.Entry"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/india"
        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.chipinput

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.Toast
import com.tutorialwing.chipinput.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)
		
		//Here, we can access using binding.chipID
	}
}

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

Different Attributes of Input Chip in XML

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

Set Checkable in Input Chip

If we don’t want it to make checkable, we can do so using android:checkable=”” attribute. 

<com.google.android.material.chip.Chip
    android:checkable="false"
    />

Learn to Set Checkable Property of Input Chip Dynamically

Show/Hide Chip Icon of Input Chip

If we want to show or hide chip icon of input chip, we can do so using app:chipIconVisible=”” attribute. 

<com.google.android.material.chip.Chip
     app:chipIconVisible="false"/>

Learn to Show or Hide Chip Icon of Input Chip Dynamically

Show/Hide Close Icon of Input Chip

We can show or hide close icon of input chip using below – 

<com.google.android.material.chip.Chip
     app:closeIconVisible="false"/>

Learn to Set Show or Hide Close Icon of Input Chip Dynamically

Set Chip Icon of Input Chip

We can set chip icon of input chip using below – 

<com.google.android.material.chip.Chip
     app:chipIcon="PATH_TO_ICON"/>

Learn to Set Chip Icon of Input Chip Dynamically

Set Chip Icon Clickable of Input Chip

We can set clickable property of input chip using below – 

<com.google.android.material.chip.Chip
     android:clickable="true"/>

If set true, Chip is clickable. Otherwise, it’s not.
Learn to Set Chip Clickable Property of Input Chip Dynamically

Set Click Listener of Chip Programmatically

We can set click listener programmatically as below – 

chip.setOnCloseIconClickListener {
	Toast.makeText(this, "Chip clicked successfully", Toast.LENGTH_SHORT).show()
}

Set Id of 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 Input Chip using android:id attribute like below – 

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

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

Set Width of Chip

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

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

Set Height of Input Chip

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

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

Set Padding of Chip

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

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

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

Set Margin of Chip

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

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

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

Set Background of Input Chip

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

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

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

Set Visibility of Chip

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

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

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

Set Text of Chip

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

    <com.google.android.material.chip.Chip
        android:id="@+id/inputChip_ID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello Tutorialwing"
        />

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

Set Color of Text in Chip

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

    <com.google.android.material.chip.Chip
        android:id="@+id/inputChip_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 Input Chip using android:textColor=”” attribute. Similarly, we can set any color using this attribute.
Learn to Set Color of Input Chip Dynamically

Set Gravity of Input Chip

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

    <com.google.android.material.chip.Chip
        android:id="@+id/inputChip_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 Input Chip using android:gravity=”” attribute. Attribute value can be – “center_horizontal”, “center”, “center_vertical” etc.
Learn to Set Gravity of Input Chip Dynamically

Set Text in Uppercase, Lowercase

If we need to show text of Input Chip 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.chip.Chip
        android:id="@+id/inputChip_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 Input Chip.

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.chip.Chip
        android:id="@+id/inputChip_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 Input Chip.

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 Input Chip.

Learn to Set Text in Uppercase or Lowercase Dynamically

Set Size of Text in Chip

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

    <com.google.android.material.chip.Chip
        android:id="@+id/inputChip_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 Input Chip using android:textSize=”” attribute.
Learn to Set Size of Text of Input Chip Dynamically

Set Style (Bold/italic) of Text in Input Chip

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

    <com.google.android.material.chip.Chip
        android:id="@+id/inputChip_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 Input Chip using android:textStyle=”” attribute. This attribute can take bold, italic or normal.
Learn to Set Style of Text of Input Chip Dynamically

Set Letter Spacing of Text in Chip

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

    <com.google.android.material.chip.Chip
        android:id="@+id/inputChip_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 Input Chip using android:letterSpacing=”” attribute.
Learn to Set Letter Spacing of Text of Input Chip Dynamically

Set Typeface of Text in Chip

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

    <com.google.android.material.chip.Chip
        android:id="@+id/inputChip_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 Input Chip using android:typeface=”” attribute. This attribute can take values – “sans”, “normal”, “monospace” or “normal”.
Learn to Set Typeface of Input Chip Dynamically

Set fontFamily of Text in Chip

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

    <com.google.android.material.chip.Chip
        android:id="@+id/inputChip_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 Input Chip using android:fontFamily=”sans-serif” attribute.

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

Different Attributes of Android Chip Widget

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

Different attributes of Input Chip inherited from TextView are –

Sr. XML Attributes Description
1 android:backgroundTint Sets tint to the background.
2 android:clickable Sets true when you want to make View clickable. Otherwise, set false.
3 android:drawableBottom Drawable to be drawn at bottom of the text.
4 android:drawableEnd Drawable to be drawn to end of the text.
5 android:drawableLeft Drawable to be drawn to left of the text.
6 android:drawablePadding Padding of the drawable.

Attributes of Checkbox inherited from Compound Button are –

Sr. XML Attributes Description
1 android:button Drawable to be used for button graphic
2 android:buttonTint Sets tint to button graphic
3 android:buttonTintMode Blending mode used to apply the button graphic tint.

Attributes of Checkbox inherited from View are –

Sr. XML Attributes Description
1 android:id It sets unique identifier for this view.
2 android:padding Sets padding of this view.
3 android:onClick Defines the operations to perform when this view is clicked
4 android:visibility Sets the visibility (visible, gone etc.) of the Checkbox.
5 android:tooltipText Defines text displayed in a small popup window on hover or long press.
6 android:background Sets background to this view.
7 android:alpha Sets alpha in view.

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

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

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