ArrayAdapter

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       MainActivity.java

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package com.jproject.mysturdy;

import androidx.appcompat.app.AppCompatActivity;

import android.app.LauncherActivity;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
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.lang.reflect.Array;
import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
    String[] arGeneral = {"김유신","이순신","강감찬","을지문덕"};

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

        ArrayAdapter<String> Adapter;
        Adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, arGeneral);

        ListView list = (ListView) findViewById(R.id.mylist);
        list.setAdapter(Adapter);
        list.setOnItemClickListener(nItemClickListener);
    }

        AdapterView.OnItemClickListener nItemClickListener = new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                String mes;
                mes = "Select  Item = " + arGeneral[position];
                Toast.makeText(getApplicationContext(), mes,Toast.LENGTH_SHORT).show();

            }
        };


}

 

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         activity.xml

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  <?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">
    <EditText
        android:id="@+id/edit1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"


        />
    <ListView
        android:id="@+id/mylist"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        />
</LinearLayout>