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我想在我的列表视图中添加一个标题，但它正在强制关闭。我正在尝试将标题放在列表视图的顶部。因此，当我创建此列表视图时，我将操作这些代码：

lv = getListView();

        LayoutInflater inflater = getLayoutInflater();
        ViewGroup header = (ViewGroup)inflater.inflate(R.layout.header, lv, false);
        lv.addHeaderView(header, null, false);

这是我的 header.xml ：

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:background="#DCDCDC"
    android:orientation="vertical" >

    <requestFocus />

    <ImageView
        android:id="@+id/imageButton2"
        android:layout_width="fill_parent"
        android:layout_height="52dip"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:contentDescription="@string/header"
        android:src="@drawable/list_header" />

     <ImageButton
        android:id="@+id/imageButtonSearch"
        android:layout_width="60dip"
        android:layout_height="45dip"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:contentDescription="@string/header"
        android:src="@drawable/search" 
        android:background="@android:color/transparent" 
        />

    <ImageView
        android:id="@+id/imageButton3"
        android:layout_width="150dip"
        android:layout_height="50dip"
        android:layout_alignBottom="@+id/imageButton2"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:contentDescription="@string/header"
        android:src="@drawable/titel" />

    </RelativeLayout>

这是我的日志：

12-04 19:31:30.478: E/AndroidRuntime(372): FATAL EXCEPTION: main
12-04 19:31:30.478: E/AndroidRuntime(372): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.laurenswuyts.find.it/com.laurenswuyts.find.it.AndroidListViewActivity}: java.lang.IllegalStateException: Cannot add header view to list -- setAdapter has already been called.
12-04 19:31:30.478: E/AndroidRuntime(372):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
12-04 19:31:30.478: E/AndroidRuntime(372):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
12-04 19:31:30.478: E/AndroidRuntime(372):  at android.app.ActivityThread.access$1500(ActivityThread.java:117)
12-04 19:31:30.478: E/AndroidRuntime(372):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
12-04 19:31:30.478: E/AndroidRuntime(372):  at android.os.Handler.dispatchMessage(Handler.java:99)
12-04 19:31:30.478: E/AndroidRuntime(372):  at android.os.Looper.loop(Looper.java:130)
12-04 19:31:30.478: E/AndroidRuntime(372):  at android.app.ActivityThread.main(ActivityThread.java:3683)
12-04 19:31:30.478: E/AndroidRuntime(372):  at java.lang.reflect.Method.invokeNative(Native Method)
12-04 19:31:30.478: E/AndroidRuntime(372):  at java.lang.reflect.Method.invoke(Method.java:507)
12-04 19:31:30.478: E/AndroidRuntime(372):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
12-04 19:31:30.478: E/AndroidRuntime(372):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
12-04 19:31:30.478: E/AndroidRuntime(372):  at dalvik.system.NativeStart.main(Native Method)
12-04 19:31:30.478: E/AndroidRuntime(372): Caused by: java.lang.IllegalStateException: Cannot add header view to list -- setAdapter has already been called.
12-04 19:31:30.478: E/AndroidRuntime(372):  at android.widget.ListView.addHeaderView(ListView.java:279)
12-04 19:31:30.478: E/AndroidRuntime(372):  at com.laurenswuyts.find.it.AndroidListViewActivity.onCreate(AndroidListViewActivity.java:80)
12-04 19:31:30.478: E/AndroidRuntime(372):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
12-04 19:31:30.478: E/AndroidRuntime(372):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
12-04 19:31:30.478: E/AndroidRuntime(372):  ... 11 more
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1 回答 1

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我认为，您只需要在 setAdapter() 之前添加 headerView，您可以在文档中阅读它 - addHeaderView()。

ListView 将所有页眉和页脚保存在特殊适配器中，该适配器包装了您的适配器（来自 setAdapter）。WrapperAdapter 将仅在 setAdapter 之前添加页脚或页眉时创建。这就是为什么您在尝试在 setAdapter 之后添加任何标头时捕获错误的原因。

如果我匆忙下结论，你能提供更多的代码吗？

于 2012-12-04T19:59:07.153 回答