Question

当我尝试将ClassCastException添加到HeaderView时，我收到ListView这里的代码为HeaderView

 View headerView = View.inflate(this, R.layout.header, null);
 listview.addHeaderView(headerView);
 listview.setAdapter(adapter);

这是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)

修改

这是我的布局

<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>

这是我的活动代码

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);
}

Answer 1

更新：正如@Zielony指出的那样，之前的解决方案会将您的标题作为孩子附加到您的列表中，而您却不希望如此。您可以采取以下措施，在不附加标题的情况下正确填充layout_*属性：

View header = LayoutInflater.from(getContext())
                        .inflate(R.layout.list_header, listView, false);
listView.addHeaderView(header);

尝试为您要充气的视图指定父级。替换这个：

View headerView = View.inflate(this, R.layout.header, null);

由此：

View headerView = View.inflate(this, R.layout.header, listview);

这应该将LayoutParams设置为正确的类型，而不再导致ClassCastException。

Answer 2

View header = (View)getLayoutInflater().inflate(R.layout.headerView,null);
ls.addHeaderView(header);

就我而言，这是有效的

View header = getLayoutInflater().inflate(R.layout.header, null);
View footer = getLayoutInflater().inflate(R.layout.footer, null);
ListView listView = getListView();
listView.addHeaderView(header);
listView.addFooterView(footer);
setListAdapter(new
ArrayAdapter<String(this,android.R.layout.simple_list_item_single_choice,android.R.id.text1, names));

Android：ClassCastException将HeaderView添加到Listview

2 个答案: