To Do List - Ch4

프로페셔널 안드로이드2 애플리케이션 개발 4장의 To Do List

To Do List application에 ContextMenu 와 OptionsMenu 추가

ContextMenu는 할 일 목록 길게 누르는 경우 나오는 메뉴로 "목록 삭제 "기능 추가

OptionsMenu는 메뉴키를 눌렀을 때 하단에 나오는 메뉴로 "추가" 와 "취소" 기능 추가

한단 OptionsMenu는 목록의 구성에 따라 취소가 삭제 또는 나타나지 않을 수 있음.

ToDoList.java
[java]
package com.paad.todolist;

import java.util.ArrayList;
import android.app.Activity;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnKeyListener;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;

public class ToDoList extends Activity {
private ArrayList todoItems;
private ListView myListView;
private EditText myEditText;
private ArrayAdapter aa;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

setContentView(R.layout.main);

myListView = (ListView)findViewById(R.id.myListView);
myEditText = (EditText)findViewById(R.id.myEditText);
todoItems = new ArrayList();

int resID = R.layout.todolist_item;
aa = new ArrayAdapter(this, resID /*android.R.layout.simple_list_item_1*/, todoItems);
myListView.setAdapter(aa);

myEditText.setOnKeyListener(new OnKeyListener(){
public boolean onKey(View v, int keyCode, KeyEvent event) {
if(event.getAction() == KeyEvent.ACTION_DOWN)
if(keyCode == KeyEvent.KEYCODE_DPAD_CENTER){
todoItems.add(0, myEditText.getText().toString());
myEditText.setText("");
aa.notifyDataSetChanged();
cancelAdd();
return true;
}
return false;
}
});
registerForContextMenu(myListView);
}
static final private int ADD_NEW_TODO = Menu.FIRST;
static final private int REMOVE_TODO = Menu.FIRST + 1;

@Override
public void onCreateContextMenu(ContextMenu menu,
View v,
ContextMenu.ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
menu.setHeaderTitle("할 일 아이템 선택");
menu.add(0, REMOVE_TODO, Menu.NONE, R.string.remove);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
// 새 메뉴 아이템을 만들어 추가
MenuItem itemAdd = menu.add(0, ADD_NEW_TODO, Menu.NONE,
R.string.add_new);
MenuItem itemRem = menu.add(0, REMOVE_TODO, Menu.NONE,
R.string.remove);
// 아이콘 할당
itemAdd.setIcon(R.drawable.add);
itemRem.setIcon(R.drawable.del);
// 단축키 할당
itemAdd.setShortcut('0', 'a');
itemRem.setShortcut('1', 'r');
return true;
}

private boolean addingNew = false;

@Override
public boolean onPrepareOptionsMenu(Menu menu) {
super.onPrepareOptionsMenu(menu);

int idx = myListView.getSelectedItemPosition();
String removeTitle = getString(addingNew ?
R.string.cancel : R.string.remove);
MenuItem removeItem = menu.findItem(REMOVE_TODO);
removeItem.setTitle(removeTitle);
removeItem.setVisible(addingNew || idx > -1);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
super.onOptionsItemSelected(item);

int index = myListView.getSelectedItemPosition();

switch(item.getItemId()){
case(REMOVE_TODO): {
if(addingNew) {
cancelAdd();
}else {
removeItem(index);
}
return true;
}
case(ADD_NEW_TODO): {
addNewItem();
return true;
}
}
return false;
}

@Override
public boolean onContextItemSelected(MenuItem item) {
super.onContextItemSelected(item);

switch(item.getItemId()) {
case(REMOVE_TODO): {
AdapterView.AdapterContextMenuInfo menuInfo;
menuInfo = (AdapterView.AdapterContextMenuInfo)item.getMenuInfo();
int index = menuInfo.position;

removeItem(index);
return true;
}
}
return false;
}

private void addNewItem() {
addingNew = true;
myEditText.setVisibility(View.VISIBLE);
myEditText.requestFocus();
}

private void cancelAdd() {
addingNew = false;
myEditText.setVisibility(View.GONE);
}
private void removeItem(int index) {
todoItems.remove(index);
aa.notifyDataSetChanged();
}
}

[/java]

todolist