一維陣列顯示在listview，利用ArrayAdapter

package com.jbuduoo.test001;

import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;

public class MainActivity extends AppCompatActivity {

    ArrayAdapter<String> adapter;
    ListView lv;
    String[] A={"1","2","3","4","5"};
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        lv =findViewById(R.id.lv);
        adapter = new ArrayAdapter<String>(this, android.R.layout.simple_expandable_list_item_1,A);
        lv.setAdapter(adapter);
    }
}