Application developing tools :
Android Studio 3.0 Canary 3
Android 25 version
Build Tools Version - 25.0.2
Kotlin Version - 1.1.2-4
Anko Library Version - 0.10.1
Follow Steps :
1. Create New Application
2. Apply plugin and Add dependency in build.gradle file
3. Add button in layout file
4. Add code in
ActivityKotlin Android Extensions plugin (automatically bundled into the Kotlin plugin in Android Studio) solves the issue: replacing
findViewById with a brief and straightforward code.Anko is a Kotlin library which makes Android application development faster and easier. It makes your code clean and easy to read, and lets you forget about rough edges of the Android SDK for Java.
we using Anko Commons: a lightweight library full of helpers for intents, dialogs, logging and so on;.
In General, Simple Text Alert with one button.
val simpleAlert = AlertDialog.Builder(this@MainActivity).create()
simpleAlert.setTitle("Alert")
simpleAlert.setMessage("Show simple Alert")
simpleAlert.setButton(AlertDialog.BUTTON_POSITIVE, "OK", {
dialogInterface, i ->
Toast.makeText(applicationContext, "You clicked on OK", Toast.LENGTH_SHORT).show()
})
simpleAlert.show()
Anko Library provide simple way to show simple text Alert with one button.
alert("Show simple Alert","Alert") {
positiveButton("OK") {
toast("You clicked on OK")
}
}.show()
let's start!
Create New Application
appyly plugin and add dependency in app-module build.gradle file
Apply Plugin
apply plugin: 'kotlin-android-extensions'Add Dependency (Anko Commons Library)
compile "org.jetbrains.anko:anko-commons:0.10.1"
Layout Files : main_activity.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="10dp"
tools:context="com.limbani.alertdialogdemo.MainActivity">
<Button
android:id="@+id/simpleAlert"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Simple Alert" />
<Button
android:id="@+id/alertTwoButton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="Alert with two Button" />
<Button
android:id="@+id/alertThreeButton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="Alert with three Button" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:gravity="center"
android:text="Using Anko Library Example" />
<Button
android:id="@+id/ankoSimpleAlert"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Simple Alert" />
<Button
android:id="@+id/ankoAlertTwoButton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="Alert with two Button" />
<Button
android:id="@+id/ankoAlertThreeButton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="Alert with three Button" />
</LinearLayout>
Activity :
MainActivity.kt here first three button show to simple way to show alert dialog and below three button show the alert dialog using Anko Library
package com.limbani.alertdialogdemo
import android.os.Bundle
import android.support.v7.app.AlertDialog
import android.support.v7.app.AppCompatActivity
import android.widget.Toast
import kotlinx.android.synthetic.main.activity_main.*
import org.jetbrains.anko.alert
import org.jetbrains.anko.toast
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
simpleAlert.setOnClickListener {
showSimpleAlert()
}
alertTwoButton.setOnClickListener {
showAlertWithTwoButton()
}
alertThreeButton.setOnClickListener {
showAlertWithThreeButton()
}
//Anko Example Button here
ankoSimpleAlert.setOnClickListener {
ankoShowSimpleAlert()
}
ankoAlertTwoButton.setOnClickListener {
ankoShowAlertWithTwoButton()
}
ankoAlertThreeButton.setOnClickListener {
ankoShowAlertWithThreeButton()
}
}
//Anko Library Example code here
private fun ankoShowAlertWithThreeButton() {
alert("Show Alert with three Button", "Alert") {
positiveButton("POSITIVE") {
toast("You clicked on POSITIVE Button")
}
negativeButton("NEGATIVE") {
toast("You clicked on NEGATIVE Button")
}
neutralPressed("NEUTRAL") {
toast("You clicked on NEUTRAL Button")
}
}.show()
}
private fun ankoShowAlertWithTwoButton() {
alert("how Alert with two Button","Alert") {
positiveButton("YES") {
toast("You clicked on YES")
}
negativeButton("NO") {
toast("You clicked on NO")
}
}.show()
}
private fun ankoShowSimpleAlert() {
alert("Show simple Alert","Alert") {
positiveButton("OK") {
toast("You clicked on OK")
}
}.show()
}
//General code here
private fun showAlertWithThreeButton() {
val alertDilog = AlertDialog.Builder(this@MainActivity).create()
alertDilog.setTitle("Alert")
alertDilog.setMessage("Show Alert with three Button")
alertDilog.setButton(AlertDialog.BUTTON_POSITIVE, "POSITIVE", {
dialogInterface, i ->
Toast.makeText(applicationContext, "You clicked on POSITIVE Button", Toast.LENGTH_SHORT).show()
})
alertDilog.setButton(AlertDialog.BUTTON_NEGATIVE, "NEGATIVE", {
dialogInterface, j ->
Toast.makeText(applicationContext, "You clicked on NEGATIVE Button", Toast.LENGTH_SHORT).show()
})
alertDilog.setButton(AlertDialog.BUTTON_NEUTRAL, "NEUTRAL", {
dialogInterface, k ->
Toast.makeText(applicationContext, "You clicked on NEUTRAL Button", Toast.LENGTH_SHORT).show()
})
alertDilog.show()
}
private fun showAlertWithTwoButton() {
val alertDilog = AlertDialog.Builder(this@MainActivity).create()
alertDilog.setTitle("Alert")
alertDilog.setMessage("Show Alert with two Button")
alertDilog.setButton(AlertDialog.BUTTON_POSITIVE, "YES", {
dialogInterface, i ->
Toast.makeText(applicationContext, "You clicked on YES", Toast.LENGTH_SHORT).show()
})
alertDilog.setButton(AlertDialog.BUTTON_NEGATIVE, "NO", {
dialogInterface, i ->
Toast.makeText(applicationContext, "You clicked on NO", Toast.LENGTH_SHORT).show()
})
alertDilog.show()
}
private fun showSimpleAlert() {
val simpleAlert = AlertDialog.Builder(this@MainActivity).create()
simpleAlert.setTitle("Alert")
simpleAlert.setMessage("Show simple Alert")
simpleAlert.setButton(AlertDialog.BUTTON_POSITIVE, "OK", {
dialogInterface, i ->
Toast.makeText(applicationContext, "You clicked on OK", Toast.LENGTH_SHORT).show()
})
simpleAlert.show()
}
}
Test (Screenshot)
Resource
https://kotlinlang.org
Android Developer Blog
Anko Library
Thanks for reading this post.
Enjoy:)
