This is a simple ListView tutorial.Here is what we do:

• Fill ListView with data from a simple ArrayList.
• We use ArrayAdapter.
• Handle ItemClicks.

Our MainActivity

This is our MainActivity class.

package com.tutorials.hp.listviewarraylist;

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.Toast;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    ArrayList<String> numbers=new ArrayList<>();
    ListView lv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        lv = (ListView) findViewById(R.id.lv);

        //FILL DATA
        fillData();

        //ADAPTER
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, numbers);
        lv.setAdapter(adapter);

        //LISTENER
        lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                Toast.makeText(MainActivity.this, numbers.get(i), Toast.LENGTH_SHORT).show();
            }
        });
    }

    //FILL DATA
    private void fillData()
    {
        for (int i=0;i<10;i++)
        {
            numbers.add("Number "+String.valueOf(i));
        }
    }
}

Our XML Layout

Our activity’s layout is here.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 
    
    android_layout_width="match_parent"
    android_layout_height="match_parent"
    android_paddingBottom="@dimen/activity_vertical_margin"
    android_paddingLeft="@dimen/activity_horizontal_margin"
    android_paddingRight="@dimen/activity_horizontal_margin"
    android_paddingTop="@dimen/activity_vertical_margin"
    tools_context="com.tutorials.hp.listviewarraylist.MainActivity">

    <ListView
        android_id="@+id/lv"
        android_layout_width="match_parent"
        android_layout_height="wrap_content"
         />
</RelativeLayout>

Good day.