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我是Android开发新手，我试图从本书中使用Eclipse/DDMS和Eclipse复制和粘贴本示例。问题是，aapt工具似乎没有正确生成R.java。 R.java在它的ID类中没有myListView和myEditText。Android aapt工具没有正确生成R.Java
main.xml中：
<?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>
的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;
}
});
}
检查R.java上的时间戳。您可能正在查看一个版本，该版本在您提到的两个项目的添加之前。它可能没有被重建。如果您的项目中有任何其他布局错误，R.java不会重新生成。 – EJK
Eclipse，ADT和所有Android软件包都是最新版本（昨晚只更新了它们）。我将这些代码剪切并粘贴到一个新项目中。所以，R.java应该实时重新生成 - 对吗？我没有看到我从本书中剪切和粘贴的布局错误。不知道该从哪里出发。 – dman
确保项目已经建成。执行以下操作：从“项目”菜单中，选择“清洁...”。这应该引发完整的构建。 – EJK