java - 错误没有与给定名称匹配的资源(在 "label"处，值为 "@string/about_title"

Question

大家好，我正在学习 Hello Android 3ed 版中的数独教程，但我无法摆脱这个错误，这是我的文件

list .xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="org.example.sudoku"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".Sudoku"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
<activity android:name=".About"
android:label="@string/about_title" >
</activity>


    </application>
    <uses-sdk android:minSdkVersion="8" />

</manifest> 

字符串.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="app_name">Sudoku</string>
    <string name="main_title">Android Sudoku</string>
    <string name="continue_label">Continue</string>
    <string name="new_game_label">New Game</string>
    <string name="about_label">About</string>
    <string name="about_text">\
Sudoku is a logic-based number placement puzzle.
Starting with a partially completed 9x9 grid, the
objective is to fill the grid so that each row, 
each column, and each of the 3x3 boxes contains 
the digits
1 to 9 exactly once.
</string>
    <string name="exit_label">Exit</string>
</resources>

关于.xml

<?xml version="1.0" encoding="UTF-8"?>
<ScrollView
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
     android:padding="10dip" >
     <TextView
     android:id="@+id/about_content"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:text="@string/about_text" />
     </ScrollView>  

Answer 1

好吧，错误说明了一切。您正在引用 ID 为 about_title 的字符串，但此类字符串未在 strings.xml 中定义。或许，您可以将其更改为 about_label，它确实已定义。