How to handle the click event in Listview in Android using Kotlin?

Kotlin AndroidApps/ApplicationsMobile Development

This example demonstrates how to handle the click event in Listview in Android using Kotlin.

Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.

Step 2 − Add the following code to res/layout/activity_main.xml.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:tools="http://schemas.android.com/tools"
   android:id="@+id/rl"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:padding="10dp"
   tools:context=".MainActivity">
   <TextView
      android:id="@+id/textView"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:padding="5dp"
      android:text="Choose is the best football player?"
      android:textColor="@android:color/holo_purple"
      android:textStyle="italic|bold" />
   <ListView
      android:id="@+id/listView"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_below="@id/textView" />
</RelativeLayout>

Step 3 − Add the following code to src/MainActivity.kt

import android.os.Bundle
import android.widget.ArrayAdapter
import android.widget.ListView
import android.widget.TextView
import androidx.appcompat.app.AppCompatActivity
import kotlin.collections.ArrayList
class MainActivity : AppCompatActivity() {
   override fun onCreate(savedInstanceState: Bundle?) {
      super.onCreate(savedInstanceState)
      setContentView(R.layout.activity_main)
      title = "KotlinApp"
      val listView: ListView = findViewById(R.id.listView)
      val textView: TextView = findViewById(R.id.textView)
      val players = arrayOf<String>("Cristiano Ronaldo", "Messi", "Pele", "Ronaldinho", "Maradona", "Neymar")
      val playerList = ArrayList<String>(listOf(*players))
      val arrayAdapter = ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, playerList)
      listView.adapter = arrayAdapter
      listView.setOnItemClickListener { parent, _, position, _ ->
         val selectedItem = parent.getItemAtPosition(position) as String
         textView.text = "The best football player is $selectedItem"
      }
   }
}

Step 4 − Add the following code to androidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
   package="com.example.q11">
   <application
      android:allowBackup="true"
      android:icon="@mipmap/ic_launcher"
      android:label="@string/app_name"
      android:roundIcon="@mipmap/ic_launcher_round"
      android:supportsRtl="true"
      android:theme="@style/AppTheme">
      <activity android:name=".MainActivity">
         <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
         </intent-filter>
      </activity>
   </application>
</manifest>

Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click the Run Play Icon icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen

raja
Published on 18-Aug-2020 11:44:43
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