How do you display a Toast using Kotlin on Android?

Question

In different Kotlin examples for Android I see toast("Some message...") or toastLong("Some long message"). For example:

view.setOnClickListener { toast("Click") }

As I understand, it is an Extension Function for Activity.

How and where do you define this toast() function so that you are able to use it throughout the project?

You can use this simple kotlin friendly library. https://github.com/Sathawale27/KotlinToasts — Sarvesh Athawale, Nov 28 '19 at 04:34
I answered in this Link : https://stackoverflow.com/a/63806312/10300202 I hope this help — Javid Sattar, Sep 09 '20 at 07:05

score 165 · Accepted Answer · answered Apr 24 '16 at 17:10

It can be an extension function for Context:

fun Context.toast(message: CharSequence) = 
    Toast.makeText(this, message, Toast.LENGTH_SHORT).show()

You can place this anywhere in your project, where exactly is up to you. For example, you can define a file mypackage.util.ContextExtensions.kt and put it there as a top level function.

Whenever you have access to a Context instance, you can import this function and use it:

import mypackage.util.ContextExtensions.toast

fun myFun(context: Context) {
    context.toast("Hello world!")
}

Zeero0 · Answer 2 · 2022-02-07T16:15:08.807

109

This is one line solution in Kotlin:

Toast.makeText(this@MainActivity, "Its a toast!", Toast.LENGTH_SHORT).show()

edited Feb 07 '22 at 16:15

answered Sep 25 '17 at 08:12

Zeero0

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Thx @Zeero0 , +1 for `this@MainActivity` . – Ravi Vaniya Feb 06 '19 at 06:22
1

I'm new to Kotlin, so pardon my ignorance, but how does this answer the question? – Jun 01 '19 at 04:52
@Zeero0 Any reason you don't use requireContent() instead of this@MainActivity? – David May 16 '22 at 16:51
2

requireContext() is part of Fragment nor Activity – Zeero0 May 21 '22 at 09:23

score 49 · Answer 3 · edited Nov 13 '18 at 16:58

49

It's actually a part of Anko, an extension for Kotlin. Syntax is as follows:

toast("Hi there!")
toast(R.string.message)
longToast("Wow, such a duration")

In your app-level build.gradle, add implementation "org.jetbrains.anko:anko-common:0.8.3"

Add import org.jetbrains.anko.toast to your Activity.

edited Nov 13 '18 at 16:58

Smart Manoj

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answered Nov 20 '16 at 00:26

Muz

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It looks like this is not officially supported by Android (I couldn't find any reference to Anko in the Android developer's website). Why could it be it so? It looks very intriguing. – Dakatine Sep 23 '18 at 14:45
2

It was from a while back, before Kotlin was officially supported by Google. Anko appears to be an unfinished project. The goal was to replace XML for layouts entirely, but they didn't do so well at it. A lot of the benefits of Anko were also gradually built into Kotlin. – Muz Sep 30 '18 at 22:59
thanks, that was very helpful. I now wonder why isn't this extension already provided by the Kotlin extensions for Android. Or is it and I can't find how to add it? :thinking: – Dakatine Oct 15 '18 at 21:42

The Bala · Answer 4 · 2019-10-11T04:18:36.557

21

Try this

In Activity

Toast.makeText(applicationContext, "Test", Toast.LENGTH_LONG).show()

or

Toast.makeText(this@MainActiivty, "Test", Toast.LENGTH_LONG).show()

In Fragment

Toast.makeText(activity, "Test", Toast.LENGTH_LONG).show()

or

Toast.makeText(activity?.applicationContext, "Test", Toast.LENGTH_LONG).show()

edited Oct 11 '19 at 04:18

answered Oct 11 '18 at 02:56

The Bala

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Aziz · Answer 5 · 2019-10-01T05:53:30.843

If you don't want to use anko and want to create your own Toast extension. You can create inline(or without inline) extensions defined in a kotlin file(with no class) and with that you can access this function in any class.

inline fun Context.toast(message:String){
   Toast.makeText(this, message , duration).show()
}

Usage:

In Activity,

toast("Toast Message")

In Fragment,

context?.toast("Toast Message")

score 4 · Answer 6 · answered Mar 05 '21 at 03:58

A very simple extension.

Add this to a toast.kt file

import android.content.Context
import android.widget.Toast
import androidx.fragment.app.Fragment

inline fun Context.toast(message:()->String){
   Toast.makeText(this, message() , Toast.LENGTH_LONG).show()
}

inline fun Fragment.toast(message:()->String){
   Toast.makeText(this.context, message() , Toast.LENGTH_LONG).show()
}

then you'll have

toast {
   "Hello World"
}

in both fragment & activity.

score 3 · Answer 7 · edited Jun 06 '19 at 15:37

3

While using Anko with Kotlin, inside fragment use either:

 activity.toast("string message")

or

 context.toast("string message")

or

 view.holder.context.toast("string message")

edited Jun 06 '19 at 15:37

Pavlos

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answered Feb 25 '18 at 07:51

vishnu benny

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Gastón Saillén · Answer 8 · 2021-04-10T19:41:13.797

3

With this extension function for Toasts, you can call them in Activities as well as Fragments, you can pass this as Context for Activities or getApplication() for Fragments, also it's generated with Toast.LENGTH_SHORT as default, so you don't need to worry to pass it as a parameter, but you can overwrite it as well if you need.

Kotlin

fun Context.showToast(message: String, duration: Int = Toast.LENGTH_SHORT){
        Toast.makeText(context, message , duration).show()
    }

Usage

showToast("John Doe")

if you want to override the duration.

showToast("John Doe", Toast.LENGTH_LONG)

edited Apr 10 '21 at 19:41

answered Apr 30 '19 at 17:28

Gastón Saillén

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why do you need to pass context again. you can absolutely use it as ```fun Context.toast(message: String, duration: Int = Toast.LENGTH_SHORT){ Toast.makeText(this, message , duration).show() }``` then ```toast("John Doe")``` or ```toast("John Doe", Toast.LENGTH_LONG)``` – Ian Elvister Apr 10 '21 at 15:42
Nice contribution @IanElvister, I will update the answer – Gastón Saillén Apr 10 '21 at 19:40

score 2 · Answer 9 · answered Jun 20 '17 at 07:32

2

I have found very easy way to Toast from given link https://gist.github.com/felipearimateia/ee651e2694c21de2c812063980b89ca3. In this link Activity is used instead of Context. Try it.

answered Jun 20 '17 at 07:32

Khyati Vara

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score 2 · Answer 10 · answered Nov 09 '19 at 13:05

2

Show a Toast not from the UI Thread, in a Fragment

activity?.runOnUiThread {
        Toast.makeText(context, "Image saved to the Gallery", Toast.LENGTH_SHORT).show()
    }

answered Nov 09 '19 at 13:05

norbDEV

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Aftab Alam · Answer 11 · 2020-04-26T06:06:28.633

2

Android Toast for Kotlin

Activity

Toast.makeText(applicationContext, "message...", Toast.LENGTH_SHORT).show()

Fragment

Toast.makeText(activity, "message...", Toast.LENGTH_SHORT).show()

edited Apr 26 '20 at 06:06

answered Apr 24 '20 at 09:21

Aftab Alam

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score 1 · Answer 12 · answered Apr 25 '16 at 12:01

1

It's simply an extension function for Context (like other pointed out already).

You can find a lot of pre-defined android extension functions in Anko, which is probably what many of the tutorials use as well.

answered Apr 25 '16 at 12:01

Lovis

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score 1 · Answer 13 · answered May 30 '17 at 08:30

Just to add on @nhaarman's answer --> you probably want to add the resourceId support as well

fun Context.toast(resourceId: Int) = toast(getString(resourceId))
fun Context.toast(message: CharSequence) = 
    Toast.makeText(this, message, Toast.LENGTH_SHORT).show()

score 1 · Answer 14 · answered Apr 23 '18 at 05:29

Download source code from here (Custom Toast In Android Kotlin )

fun Toast.createToast(context: Context, message: String, gravity: Int, duration: Int, backgroucolor: String, imagebackgroud: Int) {
        val inflater: LayoutInflater = context.getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater
        /*first parameter is the layout you made
        second parameter is the root view in that xml
         */
        val layout = inflater.inflate(R.layout.custom_toast, (context as Activity).findViewById(R.id.custom_toast_container))

        layout.findViewById(R.id.tv_message).text = message
        layout.setBackgroundColor(Color.parseColor(backgroucolor))
        layout.findViewById(R.id.iv_image).iv_image.setImageResource(imagebackgroud)
        setGravity(gravity, 0, 100)
        setDuration(Toast.LENGTH_LONG);

        setView(layout);
        show()
    }

Thanks!

score 1 · Answer 15 · edited Aug 07 '18 at 12:21

1

the way I use it simply creating an Object/Class

object UtilKotlin {
    fun showMessage(context: Context, message: String) {
        Toast.makeText(context, message, Toast.LENGTH_SHORT).show()
    }
}

and calling the method

UtilKotlin.showMessage(activity, "Sets 0 !") // in activity trying this

edited Aug 07 '18 at 12:21

gmetax

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answered Jul 22 '18 at 19:20

Samir

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score 1 · Answer 16 · answered Nov 04 '21 at 05:35

Here is extension of toast for activity or fragment

fun showToast(context: Context,@StringRes string : Int, duration: Int = Toast.LENGTH_SHORT){
  Toast.makeText(context,string,duration).show()
 }


inline fun Context.toast(message:()->String){
 Toast.makeText(this, message() , Toast.LENGTH_LONG).show()
}


inline fun Fragment.toast(message: () -> String, duration: () -> Int = { Toast.LENGTH_LONG }){
 Toast.makeText(this.context,message(),duration()).show()
}


inline fun AppCompatActivity.toast(message: () -> String, duration: () -> Int = { Toast.LENGTH_LONG }){
 Toast.makeText(this.applicationContext,message(),duration()).show()
}

If you want simple toast just call first method both fragment and activity

 showToast(yourContext,"your message")  or showToast(yourContext,"your message",1200L)

Or

toast {
 "Your message"
}

Or

toast({"your message"}) or toast({"your messge"},{your duration = 1200L})

score 0 · Answer 17 · answered Sep 22 '18 at 21:56

Custom Toast with Background color Text size AND NO XML file inflated Try the code without setting the Background color

    fun theTOAST(){

    val toast = Toast.makeText(this@MainActivity, "Use View Person List",Toast.LENGTH_LONG)
    val view = toast.view
    view.setBackgroundColor(Color.TRANSPARENT)
    val text = view.findViewById(android.R.id.message) as TextView
    text.setTextColor(Color.BLUE)
    text.textSize = (18F)
    toast.show()
}

score 0 · Answer 18 · edited Aug 09 '23 at 14:38

0

For Jetpack Compose use "context" from package "androidx.compose.runtime"

Toast.makeText(context, "Its a toast!", Toast.LENGTH_SHORT).show()

edited Aug 09 '23 at 14:38

General Grievance

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answered Aug 08 '23 at 14:16

Us3rL0sT

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How do you display a Toast using Kotlin on Android?

18 Answers18

Kotlin

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