错误:在http://developer.android.com的自定义视图中找不到属性的资源标识符

Question

我正在学习如何按照http://developer.android.com上的教程开发android应用程序.

现在我正在开发http://developer.android.com/training/custom-views/create-view.html,当我构建应用程序时,我得到错误:

D:\sviluppo\netbeans\custom-view\res\layout\main.xml:24: error: No resource identifier found for attribute 'showText' in package 'com.example.android.customviews.charting'
D:\sviluppo\netbeans\custom-view\res\layout\main.xml:24: error: No resource identifier found for attribute 'labelHeight' in package 'com.example.android.customviews.charting'
D:\sviluppo\netbeans\custom-view\res\layout\main.xml:24: error: No resource identifier found for attribute 'labelWidth' in package 'com.example.android.customviews.charting'
D:\sviluppo\netbeans\custom-view\res\layout\main.xml:24: error: No resource identifier found for attribute 'labelY' in package 'com.example.android.customviews.charting'
D:\sviluppo\netbeans\custom-view\res\layout\main.xml:24: error: No resource identifier found for attribute 'labelPosition' in package 'com.example.android.customviews.charting'
D:\sviluppo\netbeans\custom-view\res\layout\main.xml:24: error: No resource identifier found for attribute 'highlightStrength' in package 'com.example.android.customviews.charting'
D:\sviluppo\netbeans\custom-view\res\layout\main.xml:24: error: No resource identifier found for attribute 'pieRotation' in package 'com.example.android.customviews.charting'
D:\sviluppo\netbeans\custom-view\res\layout\main.xml:24: error: No resource identifier found for attribute 'labelColor' in package 'com.example.android.customviews.charting'
D:\sviluppo\netbeans\custom-view\res\layout\main.xml:24: error: No resource identifier found for attribute 'autoCenterPointerInSlice' in package 'com.example.android.customviews.charting'
D:\sviluppo\netbeans\custom-view\res\layout\main.xml:24: error: No resource identifier found for attribute 'pointerRadius' in package 'com.example.android.customviews.charting'

我从网站下载了代码并按原样安装,没有任何更改,因此main.xml是

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:custom="http://schemas.android.com/apk/res/com.example.android.customviews"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >
<com.example.android.customviews.charting.PieChart
        android:id="@+id/Pie"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:padding="10dp"
        android:layout_weight="100"
        custom:showText="true"
        custom:labelHeight="20dp"
        custom:labelWidth="110dp"
        custom:labelY="85dp"
        custom:labelPosition="left"
        custom:highlightStrength="1.12"
        android:background="@android:color/white"
        custom:pieRotation="0"
        custom:labelColor="@android:color/black"
        custom:autoCenterPointerInSlice="true"
        custom:pointerRadius="4dp"
        />
<Button
        android:id="@+id/Reset"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/reset_button"
        />
</LinearLayout>

和命名空间是一样的.

你能帮我理解为什么我会收到这些错误吗？非常感谢.

Answer 1

我也有同样的问题,答案就在这个 链接中.

简而言之,您需要更换

http://schemas.android.com/apk/res/com.example.android.customviews

同

http://schemas.android.com/apk/lib/com.example.android.customviews

即, /res/到/lib/.