ListView Demo3 - 리스트 추가, 삭제

결과화면 

 

package com.example.containerdemo; import java.util.ArrayList; import java.util.Arrays; import android.app.Activity; 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.TextView; public class ListViewDemo3 extends Activity {  Button add, delete;  ListView listview;  EditText item_name;  ArrayAdapter<String> adapter;  int deletePos = -1;;  TextView message;  ArrayList<String> alist;  @Override  protected void onCreate(Bundle savedInstanceState) {   super.onCreate(savedInstanceState);   setContentView(R.layout.listviewdemo_3);   add = (Button)findViewById(R.id.add);   message = (TextView)findViewById(R.id.message);   delete = (Button)findViewById(R.id.delete);   listview = (ListView)findViewById(R.id.listview1);   item_name = (EditText)findViewById(R.id.item_name);   alist = new ArrayList<String>();   alist.addAll(Arrays.asList(getResources().getStringArray(R.array.phone)));   adapter = new ArrayAdapter<String>   (this, android.R.layout.simple_list_item_1, alist);   listview.setAdapter(adapter);   add.setOnClickListener(new View.OnClickListener() {    @Override    public void onClick(View v) {     alist.add(0, item_name.getText().toString());     adapter.notifyDataSetChanged();    }   });   delete.setOnClickListener(new View.OnClickListener() {    @Override    public void onClick(View v) {     if(deletePos == -1){      message.setText("삭제할 Item(항목)을 선택하세요.");     } else {      alist.remove(deletePos);      adapter.notifyDataSetChanged();      message.setText("");     }    }   });   listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {    @Override    public void onItemClick(AdapterView<?> parent, View v, int position, long id) {     deletePos = position;     message.setText(alist.get(position) + "를 삭제하시겠습니까?");    }   });  } }

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:orientation="vertical" >     <TextView         android:id="@+id/message"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:text="" />     <TextView         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:text="ListView에 추가할 항목 : " />     <EditText         android:id="@+id/item_name"         android:layout_width="match_parent"         android:layout_height="wrap_content" />     <Button         android:id="@+id/add"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:text="추가" />     <Button         android:id="@+id/delete"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:text="삭제" />     <ListView         android:id="@+id/listview1"         android:layout_width="match_parent"         android:layout_height="match_parent" /> </LinearLayout>

//values폴더에 arrays.xml 생성      <?xml version="1.0" encoding="utf-8"?> <resources>     <string-array name="phone">         <item>Iphone4</item>         <item>Iphone4s</item>         <item>Iphone5</item>         <item>Iphone5s</item>         <item>Iphone5c</item>         <item>galaxy S</item>         <item>galaxy S2</item>         <item>galaxy S2 HD</item>         <item>galaxy S3 3G</item>         <item>galaxy S3 LTE</item>         <item>galaxy S4</item>         <item>galaxy S4 LTE-A</item>         <item>vega R3</item>         <item>vega IRON</item>         <item>vega LTE-A</item>         <item>optimus G</item>         <item>optimus G PRO</item>         <item>optimus GK</item>         <item>G2</item>     </string-array> </resources>