[英]How to get selected child items from ExpandableListView?
I am working with ExpandableListView having multiple group items and child items.我正在使用具有多个组项和子项的ExpandableListView 。 I am done with populating data and everything according to the requirements but i am not getting how to get selected child items from the list.
我已根据要求完成了填充数据和所有内容的工作,但我不知道如何从列表中获取选定的子项。
Below is the code for ExpandableList Adapter and the fragment containing the expandable listview:下面是 ExpandableList Adapter 的代码和包含可扩展列表视图的片段:
ExpandableList Adapter ExpandableList 适配器
public class ExpListAdapter_EnqSecond 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_EnqSecond(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.sample_type_item, null);
}
TextView txtListChild = (TextView) convertView
.findViewById(R.id.rowTextView);
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.list_group, null);
}
TextView lblListHeader = (TextView) convertView
.findViewById(R.id.lblListHeader);
lblListHeader.setTypeface(null, Typeface.BOLD);
lblListHeader.setText(headerTitle);
return convertView;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
Fragment class片段类
public class AddEnqSecond extends Fragment{
ArrayList<String> SampleList, WaterPurpostList, ConcretePurposeList, CementPurposeList, SoilPurposeList;
ExpListAdapter_EnqSecond listAdapter;
ExpandableListView expListView;
List<String> listDataHeader;
HashMap<String, List<String>> listDataChild;
View v;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
v = inflater.inflate(R.layout.add_enq_second, container, false);
init();
return v;
}
private void init() {
SampleList = new ArrayList<>();
SampleList = getArguments().getStringArrayList("list_sample");
WaterPurpostList = new ArrayList<>();
WaterPurpostList.add("Drinking Water");
WaterPurpostList.add("Construction Water");
ConcretePurposeList = new ArrayList<>();
ConcretePurposeList.add("All Tests");
ConcretePurposeList.add("Chemical Analysis");
ConcretePurposeList.add("Cubes");
ConcretePurposeList.add("Cylinder");
CementPurposeList = new ArrayList<>();
CementPurposeList.add("All Tests");
CementPurposeList.add("Cement-Physical");
CementPurposeList.add("Chemical Analysis");
SoilPurposeList = new ArrayList<>();
SoilPurposeList.add("All Tests");
SoilPurposeList.add("Chemical Analysis");
SoilPurposeList.add("Field Tests");
SoilPurposeList.add("Physical Tests");
expListView = (ExpandableListView) v.findViewById(R.id.lvExp2);
expListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
Log.d("AddEnqSecond", "onChildClick: " +childPosition );
CheckBox cb = (CheckBox) v.findViewById(R.id.CheckBox01);
if (cb != null) cb.toggle();
Log.e("Checkbox text", cb.getText().toString());
return false;
}
});
// preparing list data
prepareListData();
listAdapter = new ExpListAdapter_EnqSecond(getActivity(), listDataHeader, listDataChild);
// setting list adapter
expListView.setAdapter(listAdapter);
}
private void prepareListData() {
listDataHeader = new ArrayList<String>();
listDataChild = new HashMap<String, List<String>>();
// Adding Headers Data
for (int i = 0; i < SampleList.size(); i++) {
listDataHeader.add(SampleList.get(i).toString());
}
// Adding items to subElements of HeaderItems
for (int j = 0; j < listDataHeader.size(); j++) {
if (listDataHeader.get(j).equals("Water")) {
listDataChild.put(listDataHeader.get(j), WaterPurpostList);
} else if (listDataHeader.get(j).equals("Soil")) {
listDataChild.put(listDataHeader.get(j), SoilPurposeList);
} else if (listDataHeader.get(j).equals("Cement")) {
listDataChild.put(listDataHeader.get(j), CementPurposeList);
} else if (listDataHeader.get(j).equals("Concrete")) {
listDataChild.put(listDataHeader.get(j), ConcretePurposeList);
}
}
}
}
please help me to achieve the task.请帮助我完成任务。
Most probably nohow.很可能不知道。 You need to implement
onChildClick<\/code> in your adapter and manage checked and unchecked states by yourself.
您需要在适配器中实现
onChildClick<\/code>并自行管理选中和未选中状态。
"
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.