android kotlin listview onclick example

            android kotlin listview onclick example

In this article today learn android kotlin listview onclick example. Previous tutorial simple kotline listview example follow the link:android studio kotlin listview example.

Android kotlin  ListView is a view that contains the group of items and displays in a scrollable list. ListView is implemented by importing android.widget.ListView class. Kotlin ListView is a default scrollable which does not use other scroll views.

ListView uses Adapter classes that add the content from a data source (such as string array, array, database, etc) to ListView. Adapter bridges data between AdapterViews and other Views (ListView, ScrollView, etc).

1.MainActivity.kt:

package com.example.listview;

import android.support.v7.app.AppCompatActivity

import android.os.Bundle

import android.view.View

import android.widget.AdapterView

import android.widget.ArrayAdapter

import android.widget.ListView

import android.widget.TextView

import android.widget.Toast

class MainActivity:AppCompatActivity() {

  internal var listView:ListView

  internal var textView:TextView

  internal var listItem:Array<String>

  protected fun onCreate(savedInstanceState:Bundle) {

    super.onCreate(savedInstanceState)

    setContentView(R.layout.activity_main)

    listView = findViewById(R.id.listView) as ListView

    textView = findViewById(R.id.textView) as TextView

    listItem = getResources().getStringArray(R.array.array_technology)

    val adapter = ArrayAdapter<String>(this,

                                       android.R.layout.simple_list_item_1, android.R.id.text1, listItem)

    listView.setAdapter(adapter)

    listView.setOnItemClickListener(object:AdapterView.OnItemClickListener() {

   
   fun onItemClick(adapterView:AdapterView<*>, view:View, position:Int, l:Long) {

        // TODO Auto-generated method stub

        val value = adapter.getItem(position)

        Toast.makeText(getApplicationContext(), value, Toast.LENGTH_SHORT).show()

      }

    })

  }

}

2.activity_main.xml :

<?xml version="1.0" encoding="utf-8"?> 

<android.support.constraint.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="listview.example.com.listview.MainActivity"> 

 

    <ListView 

        android:id="@+id/listView" 

        android:layout_width="match_parent" 

        android:layout_height="fill_parent" 

         /> 

</android.support.constraint.ConstraintLayout> 

3.mylist.xml:

<?xml version="1.0" encoding="utf-8"?> 

 

<TextView xmlns:android="http://schemas.android.com/apk/res/android" 

    android:id="@+id/textView" 

    android:layout_width="wrap_content" 

    android:layout_height="wrap_content" 

    android:text="Medium Text" 

    android:textStyle="bold" 

    android:textAppearance="?android:attr/textAppearanceMedium" 

    android:layout_marginLeft="10dp" 

    android:layout_marginTop="5dp" 

    android:padding="2dp" 

    android:textColor="#4d4d4d" 

     /> 

4.strings.xml :

<resources> 

    <string name="app_name">ListView</string> 

    <string-array name="array_technology"> 

        <item>Android</item> 

        <item>Java</item> 

        <item>Php</item> 

        <item>Hadoop</item> 

        <item>Sap</item> 

        <item>Python</item> 

        <item>Ajax</item> 

        <item>C++</item> 

        <item>Ruby</item> 

        <item>Rails</item> 

        <item>.Net</item> 

        <item>Perl</item> 

    </string-array> 

</resources> 

5.AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

   package="com.example.listview" >

  

   <application

      android:allowBackup="true"

      android:icon="@drawable/ic_launcher"

      android:label="@string/app_name"

      android:theme="@style/AppTheme" >

     

      <activity

         android:name="com.example.listview.MainActivity"

         android:label="@string/app_name" >

        

         <intent-filter>

            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />

         </intent-filter>

        

      </activity>

     

   </application>

</manifest>