Creating a Tab with ListView in Kotlin

I created a Tab that contains a ListView in Kotlin.

This is the web page I used as a reference. It's a very good article, so please see his article from this one.

Add the following dependency to build.gradle

implementation 'com.android.support:design:26.1.0'

alt

	<?xml version="1.0" encoding="utf-8"?>
	<android.support.constraint.ConstraintLayout
	xmlns:android="http://schemas.android.com/apk/res/android"
	xmlns:tools="http://schemas.android.com/tools"
	xmlns:app="http://schemas.android.com/apk/res-auto"
	android:layout_width="match_parent"
	android:layout_height="match_parent"
	tools:context=".MainActivity">

	<android.support.design.widget.TabLayout
	android:id="@+id/tabs_main"
	android:layout_width="match_parent"
	android:layout_height="wrap_content"
	app:tabMode="fixed" />

	<android.support.v4.view.ViewPager
	android:id="@+id/viewpager_main"
	android:layout_width="match_parent"
	android:layout_height="wrap_content"
	app:layout_constraintTop_toBottomOf="@+id/tabs_main"/>

	</android.support.constraint.ConstraintLayout>

view raw activity_main.xml hosted with ❤ by GitHub

	apply plugin: 'com.android.application'

	apply plugin: 'kotlin-android'

	apply plugin: 'kotlin-android-extensions'

	android {
	compileSdkVersion 28
	defaultConfig {
	applicationId "swiswiswift.com.androidapp"
	minSdkVersion 15
	targetSdkVersion 28
	versionCode 1
	versionName "1.0"
	testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
	}
	buildTypes {
	release {
	minifyEnabled false
	proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
	}
	}
	}

	dependencies {
	implementation fileTree(dir: 'libs', include: ['*.jar'])
	implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
	implementation 'com.android.support:appcompat-v7:28.0.0'
	implementation 'com.android.support.constraint:constraint-layout:1.1.3'
	testImplementation 'junit:junit:4.12'
	androidTestImplementation 'com.android.support.test:runner:1.0.2'
	androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'

	implementation 'com.android.support:design:28.0.0'
	}

view raw build.gradle hosted with ❤ by GitHub

	package swiswiswift.com.androidapp

	import android.support.v4.app.Fragment
	import android.support.v4.app.FragmentManager
	import android.support.v4.app.FragmentPagerAdapter

	class MyPagerAdapter(fm: FragmentManager) : FragmentPagerAdapter(fm) {

	override fun getItem(position: Int): Fragment {
	return when (position) {
	0 -> {
	FirstFragment()
	}
	else -> {
	return SecondFragment()
	}
	}
	}

	override fun getCount(): Int {
	return 2
	}

	override fun getPageTitle(position: Int): CharSequence {
	return when (position) {
	0 -> "First"
	else -> {
	return "Second"
	}
	}
	}
	}

view raw FirstFragment.kt hosted with ❤ by GitHub

	<?xml version="1.0" encoding="utf-8"?>
	<android.support.constraint.ConstraintLayout
	xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
	android:layout_height="match_parent">

	<ListView
	android:id="@+id/listView"
	android:layout_width="match_parent"
	android:layout_height="match_parent" />
	</android.support.constraint.ConstraintLayout>

view raw fragment_first.xml hosted with ❤ by GitHub

	<?xml version="1.0" encoding="utf-8"?>
	<android.support.constraint.ConstraintLayout
	xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
	android:layout_height="match_parent">
	<ListView
	android:id="@+id/listView"
	android:layout_width="match_parent"
	android:layout_height="match_parent" />
	</android.support.constraint.ConstraintLayout>

	package swiswiswift.com.androidapp

	import android.support.v7.app.AppCompatActivity
	import android.os.Bundle
	import kotlinx.android.synthetic.main.activity_main.*

	class MainActivity : AppCompatActivity() {
	override fun onCreate(savedInstanceState: Bundle?) {
	super.onCreate(savedInstanceState)
	setContentView(R.layout.activity_main)

	val fragmentAdapter = MyPagerAdapter(supportFragmentManager)
	viewpager_main.adapter = fragmentAdapter
	tabs_main.setupWithViewPager(viewpager_main)
	}
	}

view raw MainActivity.kt hosted with ❤ by GitHub

	package swiswiswift.com.androidapp

	import android.support.v4.app.Fragment
	import android.support.v4.app.FragmentManager
	import android.support.v4.app.FragmentPagerAdapter

	class MyPagerAdapter(fm: FragmentManager) : FragmentPagerAdapter(fm) {
	override fun getItem(position: Int): Fragment {
	return when (position) {
	0 -> {
	FirstFragment()
	}
	else -> {
	return SecondFragment()
	}
	}
	}

	override fun getCount(): Int {
	return 2
	}

	override fun getPageTitle(position: Int): CharSequence {
	return when (position) {
	0 -> "First"
	else -> {
	return "Second"
	}
	}
	}
	}

view raw MyPagerAdapter.kt hosted with ❤ by GitHub

	package swiswiswift.com.androidapp

	import android.os.Bundle
	import android.support.v4.app.Fragment
	import android.view.LayoutInflater
	import android.view.View
	import android.view.ViewGroup
	import android.widget.ArrayAdapter
	import android.widget.ListView

	class SecondFragment : Fragment() {
	private var listView: ListView? = null

	override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
	super.onCreateView(inflater, container, savedInstanceState)
	val titles = arrayListOf("Mac", "Apple", "Mini", "iMac", "Pro")

	val view = inflater.inflate(R.layout.fragment_first, container, false)
	this.listView = view.findViewById(R.id.listView) as ListView
	val adapter = ArrayAdapter<String>(this.context, android.R.layout.simple_list_item_1, titles)
	listView!!.adapter = adapter
	return view
	}
	}

view raw SecondFragment.kt hosted with ❤ by GitHub