您的内容必须有一个 id 属性为“android.R.id.list”的 ListView
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Your content must have a ListView whose id attribute is 'android.R.id.list'
提问by Isa Kuru
I have created an xml file like this:
我创建了一个这样的xml文件：
<?xml version="1.0" encoding="utf-8"?>
<ListView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/list" >
</ListView>
and an activity:
和一项活动：
public class ExampleActivity extends ListActivity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.mainlist);
}
}
As you see, I have not done anything else. But I'am getting the error:
如您所见，我没有做任何其他事情。但我收到错误：
Your content must have a ListView whose id attribute is 'android.R.id.list'
您的内容必须有一个 id 属性为“android.R.id.list”的 ListView
Even though I have the android:id="@+id/list"line in my xml.
即使android:id="@+id/list"我的 xml 中有一行。
What is the problem?
问题是什么？
回答by Andro Selva
Rename the id of your ListView like this,
像这样重命名你的 ListView 的 id，
<ListView android:id="@android:id/list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
Since you are using ListActivityyour xml file must specify the keyword androidwhile mentioning to a ID.
由于您使用ListActivity的是 xml 文件，因此必须在提及 ID 时指定关键字android。
If you need a custom ListViewthen instead of Extending a ListActivity, you have to simply extend an Activityand should have the same id without the keyword android.
如果您需要自定义ListView而不是扩展 a ListActivity，您必须简单地扩展 anActivity并且应该具有相同的 id ，而没有关键字android。
回答by Praveenkumar
You should have one listview in your mainlist.xmlfile with id as @android:id/list
您的mainlist.xml文件中应该有一个列表视图，其 id 为@android:id/list
<ListView
android:id="@android:id/list"
android:layout_height="wrap_content"
android:layout_height="fill_parent"/>
回答by Aamirkhan
<ListView android:id="@android:id/list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
this should solve your problem
这应该可以解决您的问题
回答by Kevin
Exact way I fixed this based on feedback above since I couldn't get it to work at first:
我根据上面的反馈修复了这个问题的确切方法，因为我一开始无法让它工作：
activity_main.xml:
活动_main.xml：
<?xml version="1.0" encoding="utf-8"?>
<ListView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@android:id/list"
>
</ListView>
MainActivity.java:
主活动.java：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
addPreferencesFromResource(R.xml.preferences);
preferences.xml:
首选项.xml：
<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" >
<PreferenceCategory
android:key="upgradecategory"
android:title="Upgrade" >
<Preference
android:key="download"
android:title="Get OnCall Pager Pro"
android:summary="Touch to download the Pro Version!" />
</PreferenceCategory>
</PreferenceScreen>
回答by Vicky
Inherit ActivityClass instead of ListActivityyou can resolve this problem.
Inherit ActivityClass 而不是ListActivity可以解决这个问题。
public class ExampleActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.mainlist);
}
}
回答by Makvin
<ListView android:id="@id/android:list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:drawSelectorOnTop="false"
android:scrollbars="vertical"/>
回答by RudyF
One other thing that affected me: If you have multiple test devices, make sure you are making changes to the layout used by the device. In my case, I spent a while making changes to xmls in the "layout" directory until I discovered that my larger phone (which I switched to halfway through testing) was using xmls in the "layout-sw360dp" directory. Grrr!
影响我的另一件事：如果您有多个测试设备，请确保您正在更改设备使用的布局。就我而言，我花了一段时间对“layout”目录中的 xmls 进行更改，直到我发现我的较大手机（我在测试中途切换到）正在使用“layout-sw360dp”目录中的 xmls。呸！
