在点击更改Android图片，自定义扩展列表适配器 [英] Android Change image on click,custom expandable list adapter
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问题描述
我要去实施消耗的ListView自定义扩展列表适配器..
而且还对组图像变化扩大和崩溃组...我可扩展列表视图工作做好，但是当我设置的图像变化对这些事件有，当我展开一个autometically另外一个人的形象也改变一些problem..ie ...我想我不能举行组项目的正确地址。 PLZ帮我...
这里是我的code ..
公共类HomeFrame扩展片段{ ExpandableListAdapter listAdapter;
ExpandableListView expListView;
清单＆LT;串GT; listDataHeader;
ImageView的img_selection;
HashMap的＆LT;字符串列表＆LT;串GT;＆GT; listDataChild =新的HashMap＆LT;字符串列表＆LT;串GT;＆GT;（）;
公共静态INT [] = GalImages新INT [] {
R.drawable.banner_one，
R.drawable.banner，
R.drawable.banner_three，
R.drawable.banner_two，};
公共HomeFrame（）{ } @覆盖
公共查看onCreateView（LayoutInflater充气器，容器的ViewGroup，
捆绑savedInstanceState）{ 查看rootView = inflater.inflate（R.layout.home_frame，集装箱，FALSE）; ViewPager viewPager =（ViewPager）rootView.findViewById（R.id.banner）;
ImageAdapter适配器=新ImageAdapter（getActivity（））;
viewPager.setAdapter（适配器）; //img_selection=(ImageView)rootView.findViewById(R.id.img_selection）; expListView =（ExpandableListView）rootView.findViewById（R.id.lvExp）; // preparing列表数据
prepareListData（）; listAdapter =新ExpListAdapter（getActivity（），listDataHeader，
listDataChild）; //设置列表适配器
expListView.setAdapter（listAdapter）; //列表视图组单击监听器
expListView.setOnGroupClickListener（新OnGroupClickListener（）{ @覆盖
公共布尔onGroupClick（ExpandableListView父视图V，
INT groupPosition，长ID）{
Toast.makeText（getActivity（），
集团已点击+ listDataHeader.get（groupPosition）
Toast.LENGTH_SHORT）.show（）;
返回false; }
}）; //列表视图集团扩大监听器
expListView.setOnGroupExpandListener（新OnGroupExpandListener（）{ @覆盖
公共无效onGroupExpand（INT groupPosition）{ Toast.makeText（getActivity（），
groupPosition +展开，
Toast.LENGTH_SHORT）.show（）; img_selection =（ImageView的）expListView.getChildAt（groupPosition）.findViewById（R.id.img_selection）;
img_selection.setImageResource（R.drawable.arrow_se）;
}
}）; //列表视图组collasped监听器
expListView.setOnGroupCollapseListener（新OnGroupCollapseListener（）{ @覆盖
公共无效onGroupCollapse（INT groupPosition）{ Toast.makeText（getActivity（），
groupPosition +坍塌，
Toast.LENGTH_SHORT）.show（）; img_selection =（ImageView的）expListView.getChildAt（groupPosition）.findViewById（R.id.img_selection）;
// ImageView的img_selection =（ImageView的）get.findViewById（R.id.img_selection）; img_selection.setImageResource（R.drawable.arrow）;
}
}）; //列表视图儿童点击监听器
expListView.setOnChildClickListener（新OnChildClickListener（）{ @覆盖
公共布尔onChildClick（ExpandableListView父视图V，
INT groupPosition，诠释childPosition，长ID）{
// TODO自动生成方法存根
/ *
* Toast.makeText（getActivity（），
* listDataHeader.get（groupPosition）+：+
* listDataChild.get（listDataHeader.get（groupPosition））。得到（
* childPosition），Toast.LENGTH_SHORT）.show（）;
* /
返回false;
}
}）; 返回rootView;
}
和适配器类。
公共类ExpListAdapter扩展BaseExpandableListAdapter { 私人语境_context;
私人列表＆LT;串GT; _listDataHeader; //头标题
//子数据头标题格式，标题子
私人的HashMap＆LT;字符串列表＆LT;串GT;＆GT; _listDataChild; 公共ExpListAdapter（上下文的背景下，列表与LT;弦乐＆GT; listDataHeader，
HashMap的＆LT;字符串列表＆LT;串GT;＆GT; listChildData）{
this._context =背景;
this._listDataHeader = listDataHeader;
this._listDataChild = listChildData; } @覆盖
公共对象getChild（INT groupPosition，诠释childPosititon）{
返回this._listDataChild.get（this._listDataHeader.get（groupPosition））
获得（childPosititon）;
} @覆盖
众长getChildId（INT groupPosition，诠释childPosition）{
返回childPosition;
} @覆盖
公共查看getChildView（INT groupPosition，最终诠释childPosition，
布尔isLastChild，查看convertView，父母的ViewGroup）{ 最后弦乐childText =（字符串）getChild（groupPosition，childPosition）; 如果（convertView == NULL）{
LayoutInflater infalInflater =（LayoutInflater）this._context
.getSystemService（Context.LAYOUT_INFLATER_SERVICE）;
convertView = infalInflater.inflate（R.layout.list_item，NULL）;
} TextView的txtListChild =（TextView中）convertView
.findViewById（R.id.lblListItem）; txtListChild.setText（childText）;
返回convertView;
} @覆盖
公众诠释getChildrenCount（INT groupPosition）{
返回this._listDataChild.get（this._listDataHeader.get（groupPosition））
。尺寸（）;
} @覆盖
公共对象getGroup（INT groupPosition）{
返回this._listDataHeader.get（groupPosition）;
} @覆盖
公众诠释getGroupCount（）{
返回this._listDataHeader.size（）;
} @覆盖
众长getGroupId（INT groupPosition）{
返回groupPosition;
} @覆盖
公共查看getGroupView（INT groupPosition，布尔isExpanded，
查看convertView，父母的ViewGroup）{
字符串headerTitle =（字符串）getGroup（groupPosition）;
如果（convertView == NULL）{
LayoutInflater infalInflater =（LayoutInflater）this._context
.getSystemService（Context.LAYOUT_INFLATER_SERVICE）;
convertView = infalInflater.inflate（R.layout.item_home，NULL）;
} TextView的lblListHeader =（TextView中）convertView
.findViewById（R.id.heading）;
// ImageView的img_selection =（ImageView的）convertView.findViewById（R.id.img_selection）;
lblListHeader.setTypeface（NULL，Typeface.BOLD）;
lblListHeader.setText（headerTitle）;
//img_selection.setImageResource(R.drawable.arrow）; 返回convertView;
} @覆盖
公共布尔hasStableIds（）{
返回false;
} @覆盖
公共布尔isChildSelectable（INT groupPosition，诠释childPosition）{
返回true;
}}
解决方案
在自定义适配器在 getGroupView（）做到这一点：
@覆盖
公共查看getGroupView（INT groupPosition，布尔isExpanded，观景，
父母的ViewGroup）{ ImageView的img_selection =（ImageView的）view.findViewById（R.id.img_selection）;
INT imageResourceId = isExpanded？ R.drawable.group_closed
：R.drawable.group_open;
img_selection.setImageResource（imageResourceId）;
}
i am going to implementing expendable listview with custom expandable list adapter.. And also image change on group expand and group collapse...My Expandable list view work well but when i set image change on those event there are some problem..i.e when i expand one the autometically another one's image also change...i think i can not hold the proper address of the group item. Plz help me ... here is my code..
public class HomeFrame extends Fragment {
ExpandableListAdapter listAdapter;
ExpandableListView expListView;
List<String> listDataHeader;
ImageView img_selection;
HashMap<String, List<String>> listDataChild = new HashMap<String, List<String>>();
public static int[] GalImages = new int[] {
R.drawable.banner_one,
R.drawable.banner,
R.drawable.banner_three,
R.drawable.banner_two,};
public HomeFrame() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.home_frame, container, false);
ViewPager viewPager = (ViewPager) rootView.findViewById(R.id.banner);
ImageAdapter adapter = new ImageAdapter(getActivity());
viewPager.setAdapter(adapter);
//img_selection=(ImageView)rootView.findViewById(R.id.img_selection);
expListView = (ExpandableListView) rootView.findViewById(R.id.lvExp);
// preparing list data
prepareListData();
listAdapter = new ExpListAdapter(getActivity(), listDataHeader,
listDataChild);
// setting list adapter
expListView.setAdapter(listAdapter);
// Listview Group click listener
expListView.setOnGroupClickListener(new OnGroupClickListener() {
@Override
public boolean onGroupClick(ExpandableListView parent, View v,
int groupPosition, long id) {
Toast.makeText(getActivity(),
"Group Clicked " + listDataHeader.get(groupPosition),
Toast.LENGTH_SHORT).show();
return false;
}
});
// Listview Group expanded listener
expListView.setOnGroupExpandListener(new OnGroupExpandListener() {
@Override
public void onGroupExpand(int groupPosition) {
Toast.makeText(getActivity(),
groupPosition + " Expanded",
Toast.LENGTH_SHORT).show();
img_selection=(ImageView)expListView.getChildAt(groupPosition).findViewById(R.id.img_selection);
img_selection.setImageResource(R.drawable.arrow_se);
}
});
// Listview Group collasped listener
expListView.setOnGroupCollapseListener(new OnGroupCollapseListener() {
@Override
public void onGroupCollapse(int groupPosition) {
Toast.makeText(getActivity(),
groupPosition + " Collapsed",
Toast.LENGTH_SHORT).show();
img_selection=(ImageView) expListView.getChildAt(groupPosition).findViewById(R.id.img_selection);
//ImageView img_selection=(ImageView) get.findViewById(R.id.img_selection);
img_selection.setImageResource(R.drawable.arrow);
}
});
// Listview on child click listener
expListView.setOnChildClickListener(new OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
// TODO Auto-generated method stub
/*
* Toast.makeText( getActivity(),
* listDataHeader.get(groupPosition) + " : " +
* listDataChild.get( listDataHeader.get(groupPosition)).get(
* childPosition), Toast.LENGTH_SHORT) .show();
*/
return false;
}
});
return rootView;
}
And Adapter class is..
public class ExpListAdapter extends BaseExpandableListAdapter {
private Context _context;
private List<String> _listDataHeader; // header titles
// child data in format of header title, child title
private HashMap<String, List<String>> _listDataChild;
public ExpListAdapter(Context context, List<String> listDataHeader,
HashMap<String, List<String>> listChildData) {
this._context = context;
this._listDataHeader = listDataHeader;
this._listDataChild = listChildData;
}
@Override
public Object getChild(int groupPosition, int childPosititon) {
return this._listDataChild.get(this._listDataHeader.get(groupPosition))
.get(childPosititon);
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public View getChildView(int groupPosition, final int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
final String childText = (String) getChild(groupPosition, childPosition);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this._context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.list_item, null);
}
TextView txtListChild = (TextView) convertView
.findViewById(R.id.lblListItem);
txtListChild.setText(childText);
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
return this._listDataChild.get(this._listDataHeader.get(groupPosition))
.size();
}
@Override
public Object getGroup(int groupPosition) {
return this._listDataHeader.get(groupPosition);
}
@Override
public int getGroupCount() {
return this._listDataHeader.size();
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
String headerTitle = (String) getGroup(groupPosition);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this._context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.item_home, null);
}
TextView lblListHeader = (TextView) convertView
.findViewById(R.id.heading);
//ImageView img_selection=(ImageView)convertView.findViewById(R.id.img_selection);
lblListHeader.setTypeface(null, Typeface.BOLD);
lblListHeader.setText(headerTitle);
//img_selection.setImageResource(R.drawable.arrow);
return convertView;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
解决方案
In your custom adapter in the getGroupView() do this:
@Override
public View getGroupView(int groupPosition, boolean isExpanded, View view,
ViewGroup parent) {
ImageView img_selection=(ImageView) view.findViewById(R.id.img_selection);
int imageResourceId = isExpanded ? R.drawable.group_closed
: R.drawable.group_open;
img_selection.setImageResource(imageResourceId);
}
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