安卓:ClassCastException异常添加到HeaderView列表视图 [英] Android: ClassCastException Adding HeaderView to Listview
问题描述
我收到 ClassCastException异常
当我尝试 HeaderView
添加到的ListView
这里是 HeaderView
查看headerView = View.inflate(这一点,R.layout.header,NULL);
listview.addHeaderView(headerView);
listview.setAdapter(适配器);
和这里是堆栈跟踪
12月4日至25日:38:42.324:E / AndroidRuntime(18494):java.lang.ClassCastException:android.widget.RelativeLayout $的LayoutParams不能转换为android.widget.AbsListView $的LayoutParams
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.widget.ListView.setupChild(ListView.java:1826)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.widget.ListView.makeAndAddView(ListView.java:1793)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.widget.ListView.fillDown(ListView.java:691)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.widget.ListView.fillFromTop(ListView.java:752)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.widget.ListView.layoutChildren(ListView.java:1630)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.widget.AbsListView.onLayout(AbsListView.java:2091)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.view.View.layout(View.java:14817)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.view.ViewGroup.layout(ViewGroup.java:4631)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.widget.LinearLayout.setChildFrame(LinearLayout.java:1671)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.widget.LinearLayout.layoutVertical(LinearLayout.java:1525)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.widget.LinearLayout.onLayout(LinearLayout.java:1434)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.view.View.layout(View.java:14817)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.view.ViewGroup.layout(ViewGroup.java:4631)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.widget.FrameLayout.onLayout(FrameLayout.java:388)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.widget.ScrollView.onLayout(ScrollView.java:1468)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.view.View.layout(View.java:14817)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.view.ViewGroup.layout(ViewGroup.java:4631)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.widget.RelativeLayout.onLayout(RelativeLayout.java:1055)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.view.View.layout(View.java:14817)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.view.ViewGroup.layout(ViewGroup.java:4631)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.widget.FrameLayout.onLayout(FrameLayout.java:388)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.view.View.layout(View.java:14817)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.view.ViewGroup.layout(ViewGroup.java:4631)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.widget.LinearLayout.setChildFrame(LinearLayout.java:1671)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.widget.LinearLayout.layoutVertical(LinearLayout.java:1525)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.widget.LinearLayout.onLayout(LinearLayout.java:1434)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.view.View.layout(View.java:14817)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.view.ViewGroup.layout(ViewGroup.java:4631)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.widget.FrameLayout.onLayout(FrameLayout.java:388)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.view.View.layout(View.java:14817)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.view.ViewGroup.layout(ViewGroup.java:4631)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.view.ViewRootImpl.performLayout(ViewRootImpl.java:1987)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1744)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1000)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.view.ViewRootImpl $ TraversalRunnable.run(ViewRootImpl.java:5670)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.view.Choreographer $ CallbackRecord.run(Choreographer.java:761)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.view.Choreographer.doCallbacks(Choreographer.java:574)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.view.Choreographer.doFrame(Choreographer.java:544)
12月4日至25日:38:42.324:E / AndroidRuntime(18494):在android.view.Choreographer $ FrameDisplayEventReceiver.run(Choreographer.java:747)
编辑:
这是我的布局
< RelativeLayout的
机器人:ID =@ + ID / RE3
机器人:layout_width =match_parent
机器人:layout_height =WRAP_CONTENT
机器人:背景=@机器人:彩色/透明>
< ListView控件
机器人:ID =@ + ID /列表
机器人:layout_width =match_parent
机器人:layout_height =match_parent
机器人:背景=@色/白
机器人:cacheColorHint =#000000
>
< /&的ListView GT;
< / RelativeLayout的>
这就是我的活动code
保护无效的onCreate(捆绑savedInstanceState){
// TODO自动生成方法存根
super.onCreate(savedInstanceState); 的setContentView(R.layout.lay); ListView控件列表视图=(ListView控件)findViewById(R.id.list);
适配器=新LazyAdapter(这一点,L,list_cons); 查看headerView = View.inflate(这一点,R.layout.header,NULL); listview.addHeaderView(headerView);
listview.setAdapter(适配器);
}
更新:作为@Zielony指出的那样,previous的解决方案将你的头连接到您的列表作为一个孩子,你不希望出现这种情况。这里是你可以做什么膨胀的正确布局_ *
不附加头属性:
查看标题= LayoutInflater.from(的getContext())
.inflate(R.layout.list_header,ListView控件,FALSE);
listView.addHeaderView(头);
尝试指定父为你打气的看法。替换此:
查看headerView = View.inflate(这一点,R.layout.header,NULL);
通过这样:
查看headerView = View.inflate(这一点,R.layout.header,列表视图);
这应该设置的LayoutParams到正确的类型,而不是引起 ClassCastException异常
了。
I am getting ClassCastException
when i try to add HeaderView
to ListView
here is the code of HeaderView
View headerView = View.inflate(this, R.layout.header, null);
listview.addHeaderView(headerView);
listview.setAdapter(adapter);
and here is the stackTrace
04-25 12:38:42.324: E/AndroidRuntime(18494): java.lang.ClassCastException: android.widget.RelativeLayout$LayoutParams cannot be cast to android.widget.AbsListView$LayoutParams
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.widget.ListView.setupChild(ListView.java:1826)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.widget.ListView.makeAndAddView(ListView.java:1793)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.widget.ListView.fillDown(ListView.java:691)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.widget.ListView.fillFromTop(ListView.java:752)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.widget.ListView.layoutChildren(ListView.java:1630)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.widget.AbsListView.onLayout(AbsListView.java:2091)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.view.View.layout(View.java:14817)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.view.ViewGroup.layout(ViewGroup.java:4631)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1671)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1525)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.widget.LinearLayout.onLayout(LinearLayout.java:1434)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.view.View.layout(View.java:14817)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.view.ViewGroup.layout(ViewGroup.java:4631)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.widget.ScrollView.onLayout(ScrollView.java:1468)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.view.View.layout(View.java:14817)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.view.ViewGroup.layout(ViewGroup.java:4631)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1055)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.view.View.layout(View.java:14817)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.view.ViewGroup.layout(ViewGroup.java:4631)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.view.View.layout(View.java:14817)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.view.ViewGroup.layout(ViewGroup.java:4631)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1671)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1525)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.widget.LinearLayout.onLayout(LinearLayout.java:1434)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.view.View.layout(View.java:14817)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.view.ViewGroup.layout(ViewGroup.java:4631)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.view.View.layout(View.java:14817)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.view.ViewGroup.layout(ViewGroup.java:4631)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:1987)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1744)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1000)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5670)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.view.Choreographer.doCallbacks(Choreographer.java:574)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.view.Choreographer.doFrame(Choreographer.java:544)
04-25 12:38:42.324: E/AndroidRuntime(18494): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
EDIT:
This is my Layout
<RelativeLayout
android:id="@+id/re3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:color/transparent" >
<ListView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/white"
android:cacheColorHint="#000000"
>
</ListView>
</RelativeLayout>
and this is my Activity code
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.lay);
ListView listview=(ListView) findViewById(R.id.list);
adapter = new LazyAdapter(this,l, list_cons);
View headerView = View.inflate(this, R.layout.header, null);
listview.addHeaderView(headerView);
listview.setAdapter(adapter);
}
UPDATE: as @Zielony pointed out, the previous solution would attach your header to your list as a child, and you don't want that. Here is what you can do to inflate properly your layout_*
attributes without attaching the header:
View header = LayoutInflater.from(getContext())
.inflate(R.layout.list_header, listView, false);
listView.addHeaderView(header);
Try to specify the parent for the view you inflate. Replace this:
View headerView = View.inflate(this, R.layout.header, null);
By this:
View headerView = View.inflate(this, R.layout.header, listview);
This should set the LayoutParams to the right type, not causing the ClassCastException
anymore.
这篇关于安卓:ClassCastException异常添加到HeaderView列表视图的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!