I designed a ExpandableListView with CheckedTextView for child items every thing is fine but
when i check a CheckedTextView randomly CheckedTextView in another groups randomly
checking.this ExpandableListView driving me insane. here is my code
public class ExpandableListAdapter extends BaseExpandableListAdapter {
private Context context;
private List<String> expandableListTitle;
private HashMap<String, List<String>> expandableListDetail;
public int lastExpandedGroupPosition;
public ExpandableListAdapter(Context context, List<String> expandableListTitle,
HashMap<String, List<String>> expandableListDetail) {
this.context = context;
this.expandableListTitle = expandableListTitle;
this.expandableListDetail = expandableListDetail;
}
@Override
//counts the number of group/parent items so the list knows how many times calls getGroupView() method
public int getGroupCount() {
return this.expandableListTitle.size();
}
@Override
//counts the number of children items so the list knows how many times calls getChildView()
method
public int getChildrenCount(int listPosition) {
return this.expandableListDetail.get(this.expandableListTitle.get(listPosition))
.size();
}
@Override
//gets the title of each parent/group
public Object getGroup(int listPosition) {
return this.expandableListTitle.get(listPosition);
}
@Override
//gets the name of each item
public Object getChild(int listPosition, int expandedListPosition) {
return this.expandableListDetail.get(this.expandableListTitle.get(listPosition))
.get(expandedListPosition);
}
@Override
public long getGroupId(int listPosition) {
return listPosition;
}
@Override
public long getChildId(int listPosition, int expandedListPosition) {
return expandedListPosition;
}
@Override
public boolean hasStableIds() {
return true;
}
@Override
//in this method you must set the text to see the parent/group on the list
public View getGroupView(int listPosition, boolean isExpanded, View convertView, ViewGroup
parent) {
String listTitle = (String) getGroup(listPosition);
if (convertView == null) {
LayoutInflater layoutInflater = (LayoutInflater) this.context.
getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = layoutInflater.inflate(R.layout.list_group, null);
}
// set category name as tag so view can be found view later
convertView.setTag(getGroup(listPosition).toString());
TextView textView = (TextView) convertView.findViewById(R.id.listTitle);
//"i" is the position of the parent/group in the list
textView.setText(getGroup(listPosition).toString());
TextView sub = (TextView) convertView.findViewById(R.id.list_item_text_subscriptions);
return convertView;
}
@Override
//in this method you must set the text to see the children on the list
public View getChildView(int listPosition, int expandedListPosition, boolean isLastChild, View
convertView, ViewGroup parent) {
final String expandedListText = (String) getChild(listPosition, expandedListPosition);
if (convertView == null) {
LayoutInflater layoutInflater = (LayoutInflater) this.context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = layoutInflater.inflate(R.layout.list_item, null);
}
CheckedTextView textView = (CheckedTextView)
convertView.findViewById(R.id.list_item_text_child);
textView.setText(expandedListText);
return convertView;
}
@Override
public boolean isChildSelectable(int listPosition, int expandedListPosition) {
return true;
}
}
And here is the data from json response
public class ExpandableListDataPump {
public static HashMap<String, List<String>> getData() {
ServiceHandler sh = new ServiceHandler();
String url = "http://****/**/fetch_details/services/news_keywords.json";
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(url, ServiceHandler.POST);
ArrayList<HashMap<String, String>> dataHashMap = new ArrayList<HashMap<String, String>>();
try {
JSONArray jsonArray = new JSONArray(jsonStr);
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject c = jsonArray.getJSONObject(i);
HashMap<String, String> dataArray = new HashMap<String, String>();
if(!c.isNull("name")){
String region = c.getString("name");
String state = c.getString("ank_name");
dataArray.put("name", region);
dataArray.put("ank_name", state);
dataHashMap.add(dataArray);
}
}
} catch (JSONException e) {
e.printStackTrace();
}
HashMap<String, List<String>> expandableListDetail = new HashMap<String, List<String>>();
Set<String> regionsList = new HashSet<String>();
for (HashMap<String, String> map : dataHashMap) {
for (Entry<String, String> mapEntry : map.entrySet()) {
String key = mapEntry.getKey();
String value = mapEntry.getValue();
if (key.equalsIgnoreCase("name")) {
regionsList.add(value);
}
}
}
try {
JSONArray jsonArray = new JSONArray(jsonStr);
for (String regionName : regionsList) {
Log.e("Keywords list", regionName);
List<String> name = new ArrayList<String>();
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject c = jsonArray.getJSONObject(i);
String regionTemp = c.getString("name");
String nameTemp = c.getString("ank_name");
if (regionTemp.equalsIgnoreCase(regionName)) {
name.add(nameTemp);
}
}
expandableListDetail.put(regionName, name);
}
} catch (JSONException e) {
e.printStackTrace();
}
return expandableListDetail;
}
}
Yes list_group.xml is this
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/listTitle"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingLeft="?android:attr/expandableListPreferredItemPaddingLeft"
android:textColor="#A4C739"
android:paddingTop="10dp"
android:paddingBottom="10dp" />
</LinearLayout>
And list_item.xml is this
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="wrap_content">
<CheckedTextView
android:id="@+id/list_item_text_child"
android:layout_width="match_parent"
android:layout_height="?android:attr/listPreferredItemHeightSmall"
android:textAppearance="?android:attr/textAppearanceListItemSmall"
android:gravity="center_vertical"
android:textSize="15sp"
android:checkMark="?android:attr/textCheckMark"
android:paddingStart="?android:attr/listPreferredItemPaddingStart"
android:paddingEnd="?android:attr/listPreferredItemPaddingEnd"
/>
</LinearLayout>
