java - AndroidaaptツールがR.Javaを正しく生成しない

Question

私はAndroid開発に不慣れで、Eclipse / DDMSとを使用して、この例を自分の本からコピーして貼り付けようとしています。問題は、aaptツールがR.javaを正しく生成していないように見えることです。R.javaのIDクラスにはmyListViewとmyEditTextがありません。

Main.xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="match_parent"
  android:layout_height="match_parent">
  <EditText
    android:id="@+id/myEditText"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:hint="@string/addItemHint"
    android:contentDescription="@string/addItemContentDescription"
  />
  <ListView
    android:id="@+id/myListView"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
  />
</LinearLayout>

Strings.xml：

<?xml version="1.0" encoding="utf-8"?>
<resources>
  <string name="app_name">ToDoList</string>
  <string name="addItemHint">New To Do Item</string>
  <string name="addItemContentDescription">New To Do z</string>
</resources>

R.java：

/* AUTO-GENERATED FILE.  DO NOT MODIFY.
 *
 * This class was automatically generated by the
 * aapt tool from the resource data it found.  It
 * should not be modified by hand.
 */

package com.example.todolist;

    public final class R {
        public static final class attr {
        }
        public static final class drawable {
            public static final int ic_launcher=0x7f020000;
        }
        public static final class id {
            public static final int menu_settings=0x7f070000;


        }
        public static final class layout {
            public static final int main=0x7f030000;
        }
        public static final class menu {
            public static final int main=0x7f060000;
        }
        public static final class string {
            public static final int app_name=0x7f040000;
            public static final int hello_world=0x7f040001;
            public static final int menu_settings=0x7f040002;
        }
        public static final class style {
            /** 
            Base application theme, dependent on API level. This theme is replaced
            by AppBaseTheme from res/values-vXX/styles.xml on newer devices.


                Theme customizations available in newer API levels can go in
                res/values-vXX/styles.xml, while customizations related to
                backward-compatibility can go here.


            Base application theme for API 11+. This theme completely replaces
            AppBaseTheme from res/values/styles.xml on API 11+ devices.

     API 11 theme customizations can go here. 

            Base application theme for API 14+. This theme completely replaces
            AppBaseTheme from BOTH res/values/styles.xml and
            res/values-v11/styles.xml on API 14+ devices.

     API 14 theme customizations can go here. 
             */
            public static final int AppBaseTheme=0x7f050000;
            /**  Application theme. 
     All customizations that are NOT specific to a particular API-level can go here. 
             */
            public static final int AppTheme=0x7f050001;
        }
    }

Main.java：

package com.example.todolist;

import java.util.ArrayList;

import android.app.Activity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;

public class Main extends Activity {

  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // Inflate your View
    setContentView(R.layout.main);

    // Get references to UI widgets
    ListView myListView = (ListView)findViewById(R.id.myListView);
    final EditText myEditText = (EditText)findViewById(R.id.myEditText);

    // Create the Array List of to do items
    final ArrayList<String> todoItems = new ArrayList<String>();

    // Create the Array Adapter to bind the array to the List View
    final ArrayAdapter<String> aa;

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

    // Bind the Array Adapter to the List View
    myListView.setAdapter(aa);

    myEditText.setOnKeyListener(new View.OnKeyListener() {
      public boolean onKey(View v, int keyCode, KeyEvent event) { 
        if (event.getAction() == KeyEvent.ACTION_DOWN)
          if ((keyCode == KeyEvent.KEYCODE_DPAD_CENTER) ||
              (keyCode == KeyEvent.KEYCODE_ENTER)) {
            todoItems.add(0, myEditText.getText().toString());
            aa.notifyDataSetChanged();
            myEditText.setText("");
            return true;
          }
        return false;
      }
    });

  }