4

我正在 从基本的 google 资源文件夹开发RSS Feeds应用程序。现在，我正在按照示例中的建议显示所有三个内容。

1.联系方式。2.照片。3.RSS提要

这是链接：

RSS 字段 -xml 适配器

我按照我的要求很好地管理了代码。只更改包和项目名称。但其显示致命错误：

日志猫：

 04-09 17:40:02.894: E/AndroidRuntime(770): FATAL EXCEPTION: main
    04-09 17:40:02.894: E/AndroidRuntime(770): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.satyamdswt.agreader/com.satyamdswt.agreader.ContactsListActivity}: java.lang.IllegalArgumentException: The layout specified in contacts does not exist
    04-09 17:40:02.894: E/AndroidRuntime(770):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
    04-09 17:40:02.894: E/AndroidRuntime(770):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
    04-09 17:40:02.894: E/AndroidRuntime(770):  at android.app.ActivityThread.access$1500(ActivityThread.java:117)
    04-09 17:40:02.894: E/AndroidRuntime(770):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
    04-09 17:40:02.894: E/AndroidRuntime(770):  at android.os.Handler.dispatchMessage(Handler.java:99)
    04-09 17:40:02.894: E/AndroidRuntime(770):  at android.os.Looper.loop(Looper.java:123)
    04-09 17:40:02.894: E/AndroidRuntime(770):  at android.app.ActivityThread.main(ActivityThread.java:3683)
    04-09 17:40:02.894: E/AndroidRuntime(770):  at java.lang.reflect.Method.invokeNative(Native Method)
    04-09 17:40:02.894: E/AndroidRuntime(770):  at java.lang.reflect.Method.invoke(Method.java:507)
    04-09 17:40:02.894: E/AndroidRuntime(770):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
    04-09 17:40:02.894: E/AndroidRuntime(770):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
    04-09 17:40:02.894: E/AndroidRuntime(770):  at dalvik.system.NativeStart.main(Native Method)
    04-09 17:40:02.894: E/AndroidRuntime(770): Caused by: java.lang.IllegalArgumentException: The layout specified in contacts does not exist
    04-09 17:40:02.894: E/AndroidRuntime(770):  at com.satyamdswt.agreader.Adapters$XmlCursorAdapterParser.parse(Adapters.java:219)
    04-09 17:40:02.894: E/AndroidRuntime(770):  at com.satyamdswt.agreader.Adapters.createCursorAdapter(Adapters.java:168)
    04-09 17:40:02.894: E/AndroidRuntime(770):  at com.satyamdswt.agreader.Adapters.createAdapterFromXml(Adapters.java:151)
    04-09 17:40:02.894: E/AndroidRuntime(770):  at com.satyamdswt.agreader.Adapters.loadAdapter(Adapters.java:105)
    04-09 17:40:02.894: E/AndroidRuntime(770):  at com.satyamdswt.agreader.Adapters.loadAdapter(Adapters.java:92)
    04-09 17:40:02.894: E/AndroidRuntime(770):  at com.satyamdswt.agreader.ContactsListActivity.onCreate(ContactsListActivity.java:12)
    04-09 17:40:02.894: E/AndroidRuntime(770):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
    04-09 17:40:02.894: E/AndroidRuntime(770):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
    04-09 17:40:02.894: E/AndroidRuntime(770):  ... 11 more

在 LogCat 中，您会看到：

com.satyamdswt.agreader/com.satyamdswt.agreader.ContactsListActivity

我不知道为什么这发生了两次。

更多我在这里显示我的 Manifest.xml： Manifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.satyamdswt.agreader"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="10" />
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.READ_CONTACTS"/>

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name=".ContactsListActivity"
            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="PhotosListActivity"
                  android:label="@string/photos_list_activity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <activity android:name=".AGRssReaderActivity">
             <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

    </application>

</manifest>

请指导我错误在哪里。

ContactListActivity.java

public class ContactsListActivity extends ListActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.contacts_list);
        setListAdapter(Adapters.loadAdapter(this,R.xml.contacts ));
    }

}

编辑的 contacts.xml

    <?xml version="1.0" encoding="utf-8"?>
<cursor-adapter  xmlns:android="com.satyamdswt.agreader"
     xmlns:app="http://schemas.android.com/apk/res/com.satyamdswt.agreader"
    android:layout_width="@layout/contact_item"
    app:selection="has_phone_number = 1 "
    app:uri="content://com.satyamdswt.contacts/contacts" >



     <bind
        app:from="display_name"
        app:to="@id/name" 
         app:as="string"/>

    <bind
        app:as="drawable"
        app:from="starred"
        app:to="@id/star" >
        <map
            app:fromValue="0"
            app:toValue="@android:drawable/star_big_off" />
        <map
            app:fromValue="1"
            app:toValue="@android:drawable/star_big_on" />
    </bind>
    <bind
        app:as="com.satyamdswt.agreader.ContactPhotoBinder"
        app:from="_id"
        app:to="@id/name" />

</cursor-adapter>
4

2 回答 2

1

我重新创建了你的错误。问题出在您的res/xml/contacts.xml文件中

更改此行：

xmlns:app="com.satyamdswt.agreader"

到这一行：

xmlns:app="http://schemas.android.com/apk/res/com.satyamdswt.agreader"

它是您应用的 XML 命名空间的正确格式：http://schemas.android.com/apk/res/package_name

更新：您不应该更改<cursor-adapter>标签中的其他参数。正确的形式：

<cursor-adapter xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res/com.satyamdswt.agreader"
    app:uri="content://com.android.contacts/contacts"
    app:selection="has_phone_number=1"
    app:layout="@layout/contact_item">
于 2012-04-13T14:02:20.783 回答
0

将 contacts_list.xml 放入您的布局文件夹 http://developer.android.com/resources/samples/XmlAdapters/res/layout/contacts_list.html

从这里下载文件并放入您的布局文件夹 http://developer.android.com/resources/samples/XmlAdapters/res/layout/index.html

编辑

我认为错误在于这个文件 http://developer.android.com/resources/samples/XmlAdapters/res/xml/contacts.html

请检查您的布局文件夹中是否有布局“contact_item”

你可以在这里找到它 - http://developer.android.com/resources/samples/XmlAdapters/res/layout/contact_item.html

于 2012-04-11T12:35:27.517 回答