[안드로이드프로그래밍6판] 리스트뷰 기본 및 동적 추가/삭제 예제

1. 기본 예제

실행 화면

 

<xml 코드>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <ListView
        android:id="@+id/listView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

</LinearLayout>

<java 코드>

package com.cookandroid.practice11_1;

import androidx.appcompat.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;

public class MainActivity extends AppCompatActivity {

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

        final String[] mid = {"히어로즈", "24시", "로스트"};
        ListView list = findViewById(R.id.listView1);

        ArrayAdapter<String> adapter = new ArrayAdapter<>(this,
                android.R.layout.simple_list_item_1, mid);
        list.setAdapter(adapter);

        list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                Toast.makeText(getApplicationContext(), mid[i], Toast.LENGTH_SHORT).show();
            }
        });
    }
}

 

 

2. 동적 추가/삭제 예제

- 위와 차이? ArrayList<String> 변수이름 = new ArrayList<>(); 통해 이름 리스트 생성, 삭제 하게 함.

 

실행 화면

 

<xml 코드>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
    <EditText
        android:id="@+id/etName"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>
    <Button
        android:text="ADD"
        android:id="@+id/Add"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>
    <ListView
        android:id="@+id/listView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

</LinearLayout>

 

<java 코드>

package com.cookandroid.practice11_1;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;

import java.lang.reflect.Array;
import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

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

        final ArrayList<String> midList = new ArrayList<>();
        ListView list = findViewById(R.id.listView1);

        final ArrayAdapter<String> adapter = new ArrayAdapter<>(this,
                android.R.layout.simple_list_item_1, midList);
        list.setAdapter(adapter);

        final EditText etName = findViewById(R.id.etName);
        Button btnAdd = findViewById(R.id.Add);

        btnAdd.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                midList.add(etName.getText().toString());
                //데이터 변경 사실을 알려 변경 내용 표시되게 함.
                adapter.notifyDataSetChanged();
            }
        });

        list.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
            @Override
            public boolean onItemLongClick(AdapterView<?> adapterView, View view, int i, long l) {
                midList.remove(i);
                adapter.notifyDataSetChanged();
                return false;
            }
        });
    }
}