我正在寻找实现具有可扩展列表视图的片段.搜索后,我发现了一个在https://gist.github.com/1316903上实现可扩展ListvIEw片段的类.但是我不知道如何使用它.请帮我.我尝试了列表片段,但我不知道先使用带有可扩展列表视图的片段,谢谢.
解决方法:
这是我在MonoDroID / C#中得到的.我不得不删除一些代码(出于保密目的),但是它应该基本完整.
此实现可以支持不同的子视图,其中每个组包含一个特定的子类型,该子类型在整个组中都是相同的.但是,您可以在组中混合使用子类型,甚至可以使用不同的组类型(这实际上只是更改了组标题；我对两个组都使用相同的组类型,并使用组的位置来确定子类型-类型-因此group [0]包含ExpandableListChild1的子级和ExpandableListChild2的group [1](按预期用途).
这里的子类型仅因其背景颜色不同(为简单起见),但是这些视图可以是您需要的任何视图,包括自定义视图.只需为所需的任何视图创建一个对应的ExpandListChild子类.同样,基类ExpandListChildAbs可以是适合您的应用程序所需的任何类.如果只有一个子类型,则不需要基类；但是,如果有两个或多个子类型,则需要某种基类,这两个子类型都可以作为子类来支持Baseexpandablelistadapter方法getChild和相关方法中的多态性. .
[Activity( Label = "ExpandableListVIEw in a Fragment", theme = "@androID:style/theme.NoTitlebar", MainLauncher = false, ConfigurationChanges = ConfigChanges.KeyboardHIDden, windowsoftinputMode = Softinput.AdjustPan | Softinput.StateHIDden)] public class Fragment1 : Fragment{ private VIEwGroup _thisVIEw; private Bundle _bundle; private LayoutInflater _inflater; private VIEwGroup _container; public overrIDe voID OnCreate(Bundle bundle) { base.OnCreate(bundle); _bundle = bundle; _model = Model; } public overrIDe VIEw OnCreateVIEw(LayoutInflater inflater, VIEwGroup container, Bundle bundle) { base.OnCreateVIEw(inflater, container, bundle); _inflater = inflater; _container = container; _bundle = bundle; Render(); return _thisVIEw; } public overrIDe voID OnAttach(Activity activity) { base.OnAttach(activity); _dialogListener = (IDialogWindow)activity; } //public Context LocalContext { get; set; } public overrIDe voID OnActivityCreated(Bundle savedInstanceState) { base.OnActivityCreated(savedInstanceState); } public overrIDe voID OnVIEwCreated(VIEw vIEw, Bundle savedInstanceState) { base.OnVIEwCreated(vIEw, savedInstanceState); } public overrIDe voID Render() { _thisVIEw = (VIEwGroup)_inflater.Inflate(Resource.Layout.MainLayout, _container, false); ExpandableListVIEw elvParcelinfo = _thisVIEw.FindVIEwByID<ExpandableListVIEw>(Resource.ID.elv_parcel_info); List<ExpandListGroup> expandListItems = SetStandardGroups(); Expandlistadapter expandlistadapter = new Expandlistadapter(Activity.ApplicationContext, expandListItems); elvParcelinfo.SetAdapter(expandlistadapter); } public List<ExpandListGroup> SetStandardGroups() { List<ExpandListChild1> childern1 = new List<ExpandListChild1>(); for (int i = 0; i < 20; i++) { ExpandListChild1 child1 = new ExpandListChild1(); child1.name = "child1 #" + i.ToString(); child1.Tag = null; childern1.Add(child1); } ExpandListGroup group1 = new ExpandListGroup(); group1.name = "Comedy"; //group1.Items = childern1; group1.Items = new List<ExpandListChildAbs>(); foreach (ExpandListChild1 child1 in childern1) { group1.Items.Add(child1); } ///////////////////////////////////////////////////////////// List<ExpandListChild2> childern2 = new List<ExpandListChild2>(); for (int i = 0; i < 20; i++) { ExpandListChild2 child2 = new ExpandListChild2(); child2.name = "child2 #" + i.ToString(); child2.Tag = null; childern2.Add(child2); } ExpandListGroup group2 = new ExpandListGroup(); group2.name = "Action"; //group2.Items = childern2; group2.Items = new List<ExpandListChildAbs>(); foreach (ExpandListChild2 child2 in childern2) { group2.Items.Add(child2); } ///////////////////////////////////////////////////////////// List<ExpandListGroup> groups = new List<ExpandListGroup>(); groups.Add(group1); groups.Add(group2); return groups; } public abstract class ExpandListChildAbs : java.lang.Object { public abstract String name { get; set; } public abstract String Tag { get; set; } } public class ExpandListChild1 : ExpandListChildAbs { public overrIDe String name { get; set; } public overrIDe String Tag { get; set; } } public class ExpandListChild2 : ExpandListChildAbs { public overrIDe String name { get; set; } public overrIDe String Tag { get; set; } } public class ExpandListGroup : java.lang.Object { public String name { get; set; } public List<ExpandListChildAbs> Items { get; set; } } public class Expandlistadapter : Baseexpandablelistadapter { private enum ChildTypes { ChildType1, ChildType2 } private Context context; private List<ExpandListGroup> groups; public Expandlistadapter(Context context, List<ExpandListGroup> groups) { this.context = context; this.groups = groups; } public voID AddItem(ExpandListChildAbs item, ExpandListGroup group) { if (!groups.Contains(group)) { groups.Add(group); } int index = groups.IndexOf(group); List<ExpandListChildAbs> ch = groups[index].Items; ch.Add(item); groups[index].Items = ch; } public overrIDe bool HasStableIDs { get { return true; } } public overrIDe bool IsChildSelectable(int arg0, int arg1) { return true; } //______________________________________________________________________________________________________ // Get Child Methods //______________________________________________________________________________________________________ public overrIDe long GetChildID(int groupposition, int childposition) { return childposition; } public overrIDe int GetChildrenCount(int groupposition) { List<ExpandListChildAbs> chList = groups[groupposition].Items; return chList.Count; } public overrIDe int ChildTypeCount { get { return Enum.Getnames(typeof(ChildTypes)).Length; } } public overrIDe int GetChildType(int groupposition, int childposition) { //return base.GetChildType(groupposition, childposition); if (groupposition == 0) { return (int)ChildTypes.ChildType1; } if (groupposition == 1) { return (int)ChildTypes.ChildType2; } return 0; } public overrIDe java.lang.Object GetChild(int groupposition, int childposition) { List<ExpandListChildAbs> chList = groups[groupposition].Items; return chList[childposition]; } public overrIDe VIEw GetChildVIEw(int groupposition, int childposition, bool isLastChild, VIEw vIEw, VIEwGroup parent) { int ChildType = GetChildType(groupposition, childposition); if (ChildType == (int)ChildTypes.ChildType1) { return GetChildVIEw_ChildType1(groupposition, childposition, isLastChild, vIEw, parent); } if (ChildType == (int)ChildTypes.ChildType2) { return GetChildVIEw_ChildType2(groupposition, childposition, isLastChild, vIEw, parent); } return null; } private VIEw GetChildVIEw_ChildType1(int groupposition, int childposition, bool isLastChild, VIEw vIEw, VIEwGroup parent) { ExpandListChild1 child1 = (ExpandListChild1)GetChild(groupposition, childposition); if (vIEw == null) { LayoutInflater infalinflater = (LayoutInflater)context.GetSystemService(Context.LayoutInflaterService); vIEw = infalinflater.Inflate(Resource.Layout.ExpandList_ChildItem1, null); } TextVIEw tv = vIEw.FindVIEwByID<TextVIEw>(Resource.ID.tvChild1); tv.Text = child1.name; tv.Tag = child1.Tag; return vIEw; } private VIEw GetChildVIEw_ChildType2(int groupposition, int childposition, bool isLastChild, VIEw vIEw, VIEwGroup parent) { ExpandListChild2 child2 = (ExpandListChild2)GetChild(groupposition, childposition); if (vIEw == null) { LayoutInflater infalinflater = (LayoutInflater)context.GetSystemService(Context.LayoutInflaterService); vIEw = infalinflater.Inflate(Resource.Layout.ExpandList_ChildItem2, null); } TextVIEw tv = vIEw.FindVIEwByID<TextVIEw>(Resource.ID.tvChild2); tv.Text = child2.name; tv.Tag = child2.Tag; return vIEw; } //________________________________________________________________________________________________________ //______________________________________________________________________________________________________ // Get Group Methods //______________________________________________________________________________________________________ public overrIDe long GetGroupID(int groupposition) { return groupposition; } public overrIDe int GroupCount { get { return groups.Count; } } public overrIDe int GroupTypeCount { get { return base.GroupTypeCount; } } public overrIDe int GetGroupType(int groupposition) { return base.GetGroupType(groupposition); } public overrIDe java.lang.Object GetGroup(int groupposition) { return groups[groupposition]; } public overrIDe VIEw GetGroupVIEw(int groupposition, bool isLastChild, VIEw vIEw, VIEwGroup parent) { ExpandListGroup group = (ExpandListGroup) GetGroup(groupposition); if (vIEw == null) { LayoutInflater inf = (LayoutInflater) context.GetSystemService(Context.LayoutInflaterService); vIEw = inf.Inflate(Resource.Layout.ExpandList_GroupItem, null); } TextVIEw tv = vIEw.FindVIEwByID<TextVIEw>(Resource.ID.tvGroup); tv.Text = group.name; return vIEw; } //________________________________________________________________________________________________________ } }主布局
<?xml version="1.0" enCoding="utf-8"?><linearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID" androID:ID="@+ID/ll_left_parcel" androID:layout_wIDth="fill_parent" androID:layout_height="fill_parent" androID:orIEntation="vertical" androID:background="#FF8F8D8F"> <ExpandableListVIEw androID:ID="@+ID/elv_parcel_info" androID:layout_wIDth="fill_parent" androID:layout_height="wrap_content" androID:background="#FFCFCDCF" androID:groupIndicator="@null"/> </linearLayout>ExpandList_GroupItem
<?xml version="1.0" enCoding="utf-8"?><linearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID" androID:layout_wIDth="fill_parent" androID:layout_height="55dip" androID:background="#FF00AA55" androID:orIEntation="vertical" > <TextVIEw androID:ID="@+ID/tvGroup" androID:layout_wIDth="fill_parent" androID:layout_height="wrap_content" androID:layout_marginRight="15dp" androID:textcolor="#FF000000" androID:textSize="17dip" /></linearLayout>ExpandList_ChildItem1
<?xml version="1.0" enCoding="utf-8"?><linearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID" androID:layout_wIDth="match_parent" androID:layout_height="55dip" androID:background="#FF8800CC" androID:orIEntation="vertical" > <TextVIEw androID:ID="@+ID/tvChild1" androID:layout_wIDth="fill_parent" androID:layout_height="wrap_content" androID:textcolor="#FF000000" androID:textSize="17dip" /></linearLayout>ExpandList_ChildItem2
<?xml version="1.0" enCoding="utf-8"?><linearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID" androID:layout_wIDth="match_parent" androID:layout_height="55dip" androID:background="#FFAA00FF" androID:orIEntation="vertical" > <TextVIEw androID:ID="@+ID/tvChild2" androID:layout_wIDth="fill_parent" androID:layout_height="wrap_content" androID:textcolor="#FF000000" androID:textSize="17dip" /></linearLayout>以上是内存溢出为你收集整理的Android可扩展列表视图片段全部内容，希望文章能够帮你解决Android可扩展列表视图片段所遇到的程序开发问题。
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