ListView in Android

ListView is used to show the list of data with vertically scrolling . This example helps you to create a ListView in android. The items are automatically inserted in to the list using an adapter that pulls content from a source such as an array or database query and converts each item result into a view that's placed into the list.

Step 1: Create Project 

          a) Open Android Studio

          b) Go to File >New> New Project  > Project Name  > Next > Next > Next > Finish 

Step 2 : Layout Design 

         open activity_main.xml file and add the bellow code

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

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

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:background="#ff33b5e5">

    <ListView

        android:id="@+id/list"

        android:layout_width="match_parent"

        android:layout_height="wrap_content">

    </ListView>

</RelativeLayout>

Step 3 : Code 

             open MainActivity class and add the bellow code

import android.app.Activity;

import android.content.Context;

import android.os.Bundle;

import android.view.View;

import android.widget.AdapterView;

import android.widget.ArrayAdapter;

import android.widget.ListView;

import android.widget.Toast;

/**

 * Created by anupam on 30/9/16.

 */

public class MainActivity extends Activity{

    Context context;

    ListView listView;

    String[] names = new String[] { "Anupam Singh",

            "Amit Datta",

            "Parna Majumder",

            "Soumita Hazra",

            "Ajay Shaw",

            "Sujan Dutta",

            "Santu",

            "Koushik Mondal "

    };

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        // initialize context

        context=this;

       

        listView=(ListView)findViewById(R.id.list);

        // Define a new Adapter

        // First parameter - Context

        // Second parameter - resource id

        // Third parameter - textview resource id

        // Forth -  Array of data

        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,

                android.R.layout.simple_list_item_1, android.R.id.text1, names);

        // set adapter to listview

        listView.setAdapter(adapter);

        // get the name on click of listview

        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            @Override

            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                String name=(String) listView.getItemAtPosition(position);

                Toast.makeText(context,name,Toast.LENGTH_LONG).show();

            }

        });

    }

}

Step 4 : Output

                      

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