Develop Reference

Preserving Expandable listview childitem

Hi I followed this Example and implemented expandablelist that keeps track of its childitems(check boxes). I just wanted to extend this feature. I want to keep track of checkbox ,spinner and edittext. I did the following changes but got array index error. Someone please help me to do the same.
Update: I made some progress. I preserved checkbox state. Still edittext and spinner pending.
public class ServiceListAdapter extends BaseExpandableListAdapter {
private Context mContext;
private HashMap<ServiceListModel, List<ServiceListModel>> mListDataChild;
private ArrayList<ServiceListModel> mListDataGroup;
// Hashmap for keeping track of our checkbox check states
private HashMap<Integer, List<ServiceListModel>> mChildCheckStates;
private ChildViewHolder childViewHolder;
private GroupViewHolder groupViewHolder;
private ServiceListModel groupService, childService;
#SuppressLint("UseSparseArrays")
public ServiceListAdapter(Context context, ArrayList<ServiceListModel> listDataGroup, HashMap<ServiceListModel, List<ServiceListModel>> listDataChild) {
mContext = context;
mListDataGroup = listDataGroup;
mListDataChild = listDataChild;
// Initialize our hashmap containing our check states here
mChildCheckStates = new HashMap<>();
}
public int getNumberOfCheckedItemsInGroup(int mGroupPosition) {
List<ServiceListModel> services= mChildCheckStates.get(mGroupPosition);
int count = 0;
if (services != null) {
for (int j = 0; j < services.size(); ++j) {
if (services.get(j).isSelected()) count++;
}
}
return count;
}
#Override
public int getGroupCount() {
return mListDataGroup.size();
}
#Override
public ServiceListModel getGroup(int groupPosition) {
return mListDataGroup.get(groupPosition);
}
#Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
#Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
groupService = getGroup(groupPosition);
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.nav_list_group_header, null);
groupViewHolder = new GroupViewHolder();
groupViewHolder.mGroupText = convertView.findViewById(R.id.lblListHeader);
convertView.setTag(groupViewHolder);
} else {
groupViewHolder = (GroupViewHolder) convertView.getTag();
}
groupViewHolder.mGroupText.setText(groupService.getMenuName());
final ImageView arrow = convertView.findViewById(R.id.arrow);
if (getGroup(groupPosition).isHasChildren()) {
arrow.setVisibility(View.VISIBLE);
} else arrow.setVisibility(View.GONE);
if (isExpanded) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
arrow.setImageDrawable(mContext.getDrawable(R.drawable.ic_arrow_up));
} else
arrow.setImageDrawable(mContext.getResources().getDrawable(R.drawable.ic_arrow_up));
} else {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
arrow.setImageDrawable(mContext.getDrawable(R.drawable.ic_arrow_down));
} else
arrow.setImageDrawable(mContext.getResources().getDrawable(R.drawable.ic_arrow_down));
}
return convertView;
}
#Override
public int getChildrenCount(int groupPosition) {
return mListDataChild.get(mListDataGroup.get(groupPosition)).size();
}
#Override
public ServiceListModel getChild(int groupPosition, int childPosition) {
return mListDataChild.get(mListDataGroup.get(groupPosition)).get(childPosition);
}
#Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
#Override
public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
ServiceListModel serviceListModel= getChild(groupPosition, childPosition);
final int mGroupPosition = groupPosition;
final int mChildPosition = childPosition;
childService = getChild(mGroupPosition, mChildPosition);
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) this.mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.services_child_item, null);
childViewHolder = new ChildViewHolder();
childViewHolder.mCheckBox = convertView.findViewById(R.id.serviceCheckBox);
childViewHolder.feeET = convertView.findViewById(R.id.feeET);
childViewHolder.daysSpinner = convertView.findViewById(R.id.daysSpinner);
convertView.setTag(R.layout.services_child_item, childViewHolder);
} else {
childViewHolder = (ChildViewHolder) convertView.getTag(R.layout.services_child_item);
}
childViewHolder.mCheckBox.setText(childService.getMenuName());
childViewHolder.mCheckBox.setOnCheckedChangeListener(null);
if (mChildCheckStates.containsKey(mGroupPosition)) {
List<ServiceListModel> services = mChildCheckStates.get(mGroupPosition);
childViewHolder.mCheckBox.setChecked(services.get(mChildPosition).isSelected());
childViewHolder.feeET.setText(services.get(mChildPosition).getFees());
} else {
List<ServiceListModel> serModel=mListDataChild.get(mListDataGroup.get(groupPosition));
mChildCheckStates.put(mGroupPosition, serModel);
childViewHolder.mCheckBox.setChecked(false);
childViewHolder.feeET.setText("");
}
final List<KeyPairBoolData> days = new ArrayList<>();
KeyPairBoolData h = new KeyPairBoolData();
h.setId(1);
h.setName("1-3 Days");
h.setSelected(false);
days.add(h);
h = new KeyPairBoolData();
h.setId(2);
h.setName("3-7 Days");
h.setSelected(false);
days.add(h);
h = new KeyPairBoolData();
h.setId(3);
h.setName("7-15 Days");
h.setSelected(false);
days.add(h);
h = new KeyPairBoolData();
h.setId(3);
h.setName("Above 15 Days");
h.setSelected(false);
days.add(h);
childViewHolder.daysSpinner.setItems(days, -1, new SpinnerListener() {
#Override
public void onItemsSelected(List<KeyPairBoolData> items) {
for (int i = 0; i < items.size(); i++) {
if (items.get(i).isSelected()) {
Log.i("blb07", i + " : " + items.get(i).getName() + " : " + items.get(i).isSelected());
}
}
}
});
childViewHolder.mCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
List<ServiceListModel> serv= mChildCheckStates.get(mGroupPosition);
serv.get(mChildPosition).setSelected(isChecked);
mChildCheckStates.put(mGroupPosition, serv);
}
});
childViewHolder.feeET.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
Log.i("blb07","before "+s);
}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
Log.i("blb07","On "+s);
}
#Override
public void afterTextChanged(Editable s) {
Log.i("blb07","after "+s);
List<ServiceListModel> serv= mChildCheckStates.get(mGroupPosition);
serv.get(mChildPosition).setFees(s.toString());
mChildCheckStates.put(mGroupPosition, serv);
}
});
return convertView;
}
#Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return false;
}
#Override
public boolean hasStableIds() {
return false;
}
public final class GroupViewHolder {
TextView mGroupText;
}
public final class ChildViewHolder {
SingleSpinner daysSpinner;
CheckBox mCheckBox;
EditText feeET;
}
}
The model class
public class ServiceListModel {
public boolean hasChildren, isGroup;
private String menuName, fees, days;
private int id;
private boolean selected;
public ServiceListModel(int id, String menuName, boolean isGroup, boolean hasChildren) {
this.menuName = menuName;
this.isGroup = isGroup;
this.hasChildren = hasChildren;
this.id = id;
}
public boolean isSelected() {
return selected;
}
public void setSelected(boolean selected) {
this.selected = selected;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getMenuName() {
return menuName;
}
public void setMenuName(String menuName) {
this.menuName = menuName;
}
public String getFees() {
return fees;
}
public void setFees(String fees) {
this.fees = fees;
}
public String getDays() {
return days;
}
public void setDays(String days) {
this.days = days;
}
}

I have not tested it but the problem could be in your loop using preincrement instead of postincrement:
public int getNumberOfCheckedItemsInGroup(int mGroupPosition) {
List<ServiceListModel> services= mChildCheckStates.get(mGroupPosition);
int count = 0;
if (services != null) {
for (int j = 0; j < services.size(); ++j) {
if (services.get(j).isSelected()) count++;
}
}
return count;
}
I guess for should be for (int j = 0; j < services.size(); j++)

Getting data from adapter to activity

I have a check list (Customized expandable list view) that I am populating through adapter. I want to retrieve an array from adapter to Activity on click of a text view in activity.
Activity is as follows, I want to retrieve data in onOptionsItemSelected function:
public class MyPreferencesActivity extends BaseActivity implements PreferencesContract.View, AdapterView.OnItemClickListener, ExpandableListView.OnGroupClickListener {
private PreferencesContract.Presenter mPresenterPreferences;
private Context context;
private ExpandableListView elvListView;
private ArrayList<CategoryModel> categories;
private ExpandableListAdapter ela;
private List<CategoryModel> mCategories;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my_preferences);
this.context = this;
Toolbar toolbar = (Toolbar) findViewById(R.id.tool_bar);
setupActionbar(toolbar, getString(R.string.preferneces), true, R.drawable.ab_home);
new PreferencesPresenter(this,
Injection.provideUseCaseHandler(),
Injection.provideGetCategories(getApplicationContext())
);
mPresenterPreferences.getCategories();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_save_my_preferences, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem menuItem) {
//listener for home
switch (menuItem.getItemId()) {
case R.id.menu_create_event:
break;
}
return super.onOptionsItemSelected(menuItem);
}
private void populateList() {
categories = new ArrayList<>();
for (int i = 0; i < mCategories.size(); i ++){
categories.add(new CategoryModel(mCategories.get(i).getCategoryName(), mCategories.get(i).getCategoryId(), mCategories.get(i).getSubCategories()));
}
}
#Override
public void onItemClick(AdapterView<?> adapterView, android.view.View view, int i, long l) {
}
#Override
public boolean onGroupClick(ExpandableListView expandableListView, android.view.View view, int i, long l) {
return false;
}
#Override
public void setLoading(boolean isActive) {}
public void initViews(){
ela = new ExpandableListAdapter(this, categories);
elvListView = (ExpandableListView) findViewById(R.id.lv_preferences);
elvListView.setAdapter(ela);
elvListView.setOnItemClickListener(this);
elvListView.setOnGroupClickListener(this);
}
#Override
public void showGetPreferencesSuccess(List<CategoryModel> categories) {
setLoading(false);
mCategories = categories;
populateList();
initViews();
}
#Override
public void showGetPreferencesFail(int errorCode) {
}
#Override
public void setPresenter(PreferencesContract.Presenter presenter) {
mPresenterPreferences = Preconditions.checkNotNull(presenter);
}
}
Adapter is as follows:
public class ExpandableListAdapter extends BaseExpandableListAdapter {
private Context context;
private ArrayList<String> item;
private ArrayList<Boolean> itemsChecked;
private ArrayList<ArrayList<Boolean>> childChecked;
private ArrayList<ArrayList<String>> childList;
public ExpandableListAdapter(Context c, ArrayList<CategoryModel> d) {
this.context = c;
this.item = new ArrayList<>();
for (int i = 0; i< d.size(); i++){
this.item.add(d.get(i).getCategoryName());
ArrayList<String> subCat = new ArrayList<>();
for (int j = 0 ; j < d.get(j).getSubCategories().size() ; j++){
subCat.add(d.get(j).getSubCategories().get(j).getSubCategoryName());
}
childList.add(subCat);
}
itemsChecked = new ArrayList<>();
childChecked = new ArrayList<ArrayList<Boolean>>();
for (int i = 0; i < this.item.size() ; i++) {
itemsChecked.add(false);
ArrayList <Boolean>temp = new ArrayList<>();
for (int j = 0 ; j < childList.get(i).size(); j ++){
temp.add(false);
}
childChecked.add(temp);
}
}
#Override
public View getGroupView(final int groupPosition, boolean isExpanded, View convertView, final ViewGroup parent) {
LayoutInflater infalInflater = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.my_preferences_list_group, null);
TextView tvName = (TextView) convertView.findViewById(R.id.tvGroupName);
final CheckBox checkBox = (CheckBox)convertView.findViewById(R.id.checkbox);
if((getChildrenCount(groupPosition) == 0 && itemsChecked.get(groupPosition))|| (getChildrenCount(groupPosition) > 0 && !(childChecked.get(groupPosition).contains(false)))) {
checkBox.setChecked(true);
}
else {
checkBox.setChecked(false);
}
checkBox.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
CheckBox checkBox = (CheckBox)view;
RelativeLayout vwParentRow = (RelativeLayout)view.getParent();
TextView child = (TextView)vwParentRow.getChildAt(0);
final int position = item.indexOf(child.getText());
if (checkBox.isChecked()){
itemsChecked.set(position, true);
for (int i = 0 ; i < getChildrenCount(groupPosition); i++){
childChecked.get(groupPosition).set(i, true);
}
}
else {
itemsChecked.set(position, false);
for (int i = 0 ; i < getChildrenCount(groupPosition); i++){
childChecked.get(groupPosition).set(i, false);
}
}
ExpandableListAdapter.this.notifyDataSetChanged();
}
});
TextView tvCount = (TextView) convertView.findViewById(R.id.tv_item_count);
tvName.setText(item.get(groupPosition));
int childCount = getChildrenCount(groupPosition);
if (childCount > 0) {
tvCount.setText(getChildrenCount(groupPosition) + "items");
tvCount.setVisibility(View.VISIBLE);
}
if (isExpanded) {
}
else {
}
return convertView;
}
#Override
public View getChildView(int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
LayoutInflater infalInflater = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.my_preferences_list_item, null);
TextView tvName = (TextView) convertView.findViewById(R.id.tv_item);
CheckBox checkBox = (CheckBox)convertView.findViewById(R.id.checkBox);
if (childChecked.get(groupPosition).get(childPosition))
checkBox.setChecked(true);
checkBox.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
CheckBox checkBox = (CheckBox)view;
RelativeLayout vwParentRow = (RelativeLayout)view.getParent();
TextView child = (TextView)vwParentRow.getChildAt(0);
int position = -1;
for (int i = 0 ; i < childList.size(); i++){
if (childList.get(i).contains(child.getText())){
if(checkBox.isChecked()) {
childChecked.get(i).set(childList.get(i).indexOf(child.getText()) , true);
ExpandableListAdapter.this.notifyDataSetChanged();
}
else {
childChecked.get(i).set(childList.get(i).indexOf(child.getText()) , false);
ExpandableListAdapter.this.notifyDataSetChanged();
}
}
}
if (checkBox.isChecked()){
if (position >0 )
itemsChecked.set(position, true);
}
else if(position > 0) {
itemsChecked.set(position, false);
}
}
});
String s = childList.get(groupPosition).get(childPosition);
tvName.setText(s);
return convertView;
}
#Override
public int getChildrenCount(int groupPosition) {
return childList.get(groupPosition).size();
}
#Override
public Object getChild(int groupPosition, int childPosition) {
return childList.get(groupPosition).get(childPosition);
}
#Override
public int getGroupCount() {
return item.size();
}
#Override
public Object getGroup(int groupPosition) {
return item.get(groupPosition);
}
#Override
public long getGroupId(int groupPosition) {
return 0;
}
#Override
public long getChildId(int groupPosition, int childPosition) {
return 0;
}
#Override
public boolean hasStableIds() {
return false;
}
#Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
I have an idea of sending data from Activity to Adapter.
Any help in doing it some other way?

I think it's as simple as creating a getter inside your adapter
public List<String> getItems() {
return this.item;
}
And inside onOptionsItemSelected in the activity
ela.getItems();

how to hide group indicator if no child in expendablelistview in android

public class MainActivity extends AppCompatActivity {
private CollapsingToolbarLayout collapsingToolbarLayout = null;
HashMap<String, List<ExpandableListItem>> _child;
String response;
String serviceName, serviceIcon, serviceId;
ExpandableListView expandableListView;
CustomExpandableListAdapter expandableListAdapter;
String groupName;
String childName;
List<ExpandableListItem> listtG1;
JSONArray jsonArray;
List<ExpandableListItem> _header;
ExpandableListItem rowData;
List<String> _groupNameList;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
ActionBar actionBar = getSupportActionBar();
actionBar.setDisplayHomeAsUpEnabled(true);
collapsingToolbarLayout = (CollapsingToolbarLayout) findViewById(R.id.collapsing_toolbar);
collapsingToolbarLayout.setTitle(getResources().getString(R.string.user_name));
new CategoryServices().execute("");
expandableListView = (ExpandableListView) findViewById(R.id.expandableListView);
expandableListView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {
#Override
public void onGroupExpand(int groupPosition) {
groupName = _groupNameList.get(groupPosition);
listtG1 = _child.get(groupName);
Log.d("ListSize", String.valueOf(listtG1.size()));
Toast.makeText(MainActivity.this,groupName+""+childName,Toast.LENGTH_LONG).show();
}
});
expandableListView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {
#Override
public void onGroupExpand(int groupPosition) {
Toast.makeText(MainActivity.this,groupName+""+childName,Toast.LENGTH_LONG).show();
}
});
expandableListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {
groupName = _groupNameList.get(groupPosition);
listtG1 = _child.get(groupName);
Toast.makeText(MainActivity.this, groupName,Toast.LENGTH_LONG).show();
Log.d("ListSize", String.valueOf(listtG1.size()));
if (listtG1.size() == 1 && listtG1.get(0).getServiceName().equals(groupName)) {
expandableListView.setGroupIndicator(null);
return true;
}
return false;
}
});
expandableListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
#Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
childName = listtG1.get(childPosition).getServiceName();
Toast.makeText(
getApplicationContext(),
childName, Toast.LENGTH_SHORT
).show();
return false;
}
});
dynamicToolbarColor();
toolbarTextAppernce();
}
private void dynamicToolbarColor() {
Bitmap bitmap = BitmapFactory.decodeResource(getResources(),
R.drawable.profile_pic);
Palette.from(bitmap).generate(new Palette.PaletteAsyncListener() {
#Override
public void onGenerated(Palette palette) {
collapsingToolbarLayout.setContentScrimColor(palette.getMutedColor(R.attr.colorPrimary));
collapsingToolbarLayout.setStatusBarScrimColor(palette.getMutedColor(R.attr.colorPrimaryDark));
}
});
}
private void toolbarTextAppernce() {
collapsingToolbarLayout.setCollapsedTitleTextAppearance(R.style.collapsedappbar);
collapsingToolbarLayout.setExpandedTitleTextAppearance(R.style.expandedappbar);
}
class CategoryServices extends AsyncTask<String, Void, String> {
#Override
protected void onPreExecute() {
}
#Override
protected String doInBackground(String... params) {
response = JSONFunctions.getJSONfromURL("http://cpanel.smartindiaservice.com/api/categoryservices?categoryid=13");
return response;
}
#Override
protected void onPostExecute(String result) {
try {
setListAdapter(result, expandableListView);
// return false;
} catch (NullPointerException e) {
}
super.onPostExecute(result);
}
}
private void setListAdapter(String response, ExpandableListView expandableListView) {
_child = new HashMap<>();
_groupNameList = new ArrayList<>();
if (!response.isEmpty()) {
try {
jsonArray = new JSONArray(response);
if (jsonArray != null && jsonArray.length() > 0) {
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject productObj = jsonArray.getJSONObject(i);
String groupName = productObj.getString("Service");
JSONArray servicesArray = productObj.getJSONArray("SubServices");
if (servicesArray != null && servicesArray.length() > 0) {
_header = new ArrayList<>();
for (int j = 0; j < servicesArray.length(); j++) {
JSONObject serviceObj = servicesArray.getJSONObject(j);
rowData = new ExpandableListItem();
serviceName = serviceObj.getString("SubServiceName");
serviceIcon = serviceObj.getString("SubServiceDescription");
serviceId = serviceObj.getString("SubServiceID");
rowData.setGroupName(groupName);
rowData.setServiceIcon(serviceIcon);
rowData.setServiceId(serviceId);
rowData.setServiceName(serviceName);
_header.add(rowData);
}
}
_child.put(groupName, _header);
_groupNameList.add(groupName);
}
}
} catch (JSONException e) {
e.printStackTrace();
}
expandableListAdapter = new CustomExpandableListAdapter(this, _groupNameList, _child);
expandableListView.setAdapter(expandableListAdapter);
}
}
}
public class CustomExpandableListAdapter extends BaseExpandableListAdapter {
private Context context;
private List<String> expandableListTitle;
private HashMap<String, List<ExpandableListItem>> expandableListDetail;
public CustomExpandableListAdapter(Context context, List<String> expandableListTitle,
HashMap<String, List<ExpandableListItem>> expandableListDetail) {
this.context = context;
this.expandableListTitle = expandableListTitle;
this.expandableListDetail = expandableListDetail;
}
#Override
public Object getChild(int listPosition, int expandedListPosition) {
return this.expandableListDetail.get(this.expandableListTitle.get(listPosition))
.get(expandedListPosition);
}
#Override
public long getChildId(int listPosition, int expandedListPosition) {
return expandedListPosition;
}
#Override
public View getChildView(int listPosition, final int expandedListPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
// final String expandedListText = getChild(listPosition, expandedListPosition).g;
ExpandableListItem rowData = (ExpandableListItem) getChild(listPosition, expandedListPosition);
if (convertView == null) {
LayoutInflater layoutInflater = (LayoutInflater) this.context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = layoutInflater.inflate(R.layout.list_item, null);
}
TextView expandedListTextView = (TextView) convertView
.findViewById(R.id.expandedListItem);
expandedListTextView.setText(rowData.getServiceName());
return convertView;
}
#Override
public int getChildrenCount(int listPosition) {
return this.expandableListDetail.get(this.expandableListTitle.get(listPosition))
.size();
}
#Override
public Object getGroup(int listPosition) {
return this.expandableListTitle.get(listPosition);
}
#Override
public int getGroupCount() {
return this.expandableListTitle.size();
}
#Override
public long getGroupId(int listPosition) {
return listPosition;
}
#Override
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);
}
TextView listTitleTextView = (TextView) convertView
.findViewById(R.id.listTitle);
listTitleTextView.setTypeface(null, Typeface.BOLD);
listTitleTextView.setText(listTitle);
return convertView;
}
#Override
public boolean hasStableIds() {
return false;
}
#Override
public boolean isChildSelectable(int listPosition, int expandedListPosition) {
return true;
}
}
this is my activity and adapter i am able to display data in expandable list-view i want show indicator when group contain more than one child and i want hide group indicator when group contain only one child and group name and child name is same i am trying to in activity expandableListView.setGroupIndicator(null); using this code on setOnGroupClickListener this click but what happed firs time it display all indicator and when i click on group whose child is one and name same then it hide all indicator please suggest me how to fix this issue

ExpandableListview with single as well as multiple selection

[Adapter class]
public class CustomExpandableListAdapter extends BaseExpandableListAdapter {
private Context context;
private List<String> expandableListTitle;
private HashMap<String, List<FilterList>> expandableListDetail;
private boolean checked;
private int lastClickedPosition;
private List<Boolean> setValueForSeletedFilter;
private String[] keysOfHashmap;
public CustomExpandableListAdapter(Context context, List<String> expandableListTitle,
HashMap<String, List<FilterList>> expandableListDetail, List<Boolean> setValueForSeletedFilter) {
this.context = context;
this.expandableListTitle = expandableListTitle;
this.expandableListDetail = expandableListDetail;
this.setValueForSeletedFilter = setValueForSeletedFilter;
}
#Override
public Object getChild(int listPosition, int expandedListPosition) {
return this.expandableListDetail.get(this.expandableListTitle.get(listPosition))
.get(expandedListPosition).getSearchFilterValue();
}
#Override
public long getChildId(int listPosition, int expandedListPosition) {
return expandedListPosition;
}
#Override
public View getChildView(final int listPosition, final int expandedListPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
final String expandedListText = (String) getChild(listPosition, expandedListPosition);
if (convertView == null) {
int i = listPosition;
int j = expandedListPosition;
LayoutInflater layoutInflater = (LayoutInflater) this.context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = layoutInflater.inflate(R.layout.list_item, null);
TextView expandedListTextView = (TextView) convertView
.findViewById(R.id.expandedListItem);
expandedListTextView.setText(expandedListText);
String s = expandableListTitle.get(listPosition);
final ImageView imageView = (ImageView) convertView.findViewById(R.id.iv_select);
if (setValueForSeletedFilter.get(expandedListPosition) == true) {
imageView.setVisibility(View.VISIBLE);
} else {
imageView.setVisibility(View.GONE);
}
}
return convertView;
}
private void toggleSelection(int i, View v) {
int j = i;
ImageView imageView = (ImageView) v.findViewById(R.id.iv_select);
imageView.setImageResource(R.drawable.ic_review);
}
#Override
public int getChildrenCount(int listPosition) {
return this.expandableListDetail.get(this.expandableListTitle.get(listPosition))
.size();
}
#Override
public Object getGroup(int listPosition) {
return this.expandableListTitle.get(listPosition);
}
#Override
public int getGroupCount() {
return this.expandableListTitle.size();
}
#Override
public long getGroupId(int listPosition) {
return listPosition;
}
#Override
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);
}
TextView listTitleTextView = (TextView) convertView
.findViewById(R.id.listTitle);
listTitleTextView.setTypeface(null, Typeface.BOLD);
listTitleTextView.setText(listTitle);
return convertView;
}
#Override
public boolean hasStableIds() {
return true;
}
public void setData(){
notifyDataSetChanged();
}
#Override
public boolean isChildSelectable(int listPosition, int expandedListPosition) {
return true;
}
}
[setting values for adapter class and notifying adapter on changing values]
final HashMap> setValueForSeletedFilter = new HashMap<>();
String header = null;
final List booleanList = new ArrayList<>();
final HashMap> stringListHashMap = new HashMap<>();
final List expandableListTitle;
for (int i = 0; i < filtersInfos.size(); i++) {
stringListHashMap.put(filtersInfos.get(i).getFilterHeaderName(), filtersInfos.get(i).getFilterLists());
if (filtersInfos.get(i).getFilterHeaderName().equalsIgnoreCase("Distance")) {
header = filtersInfos.get(i).getFilterHeaderName();
for (int j = 0; j < filtersInfos.get(i).getFilterLists().size(); j++)
booleanList.add(false);
}
}
setValueForSeletedFilter.put(header, booleanList);
expandableListTitle = new ArrayList<String>(stringListHashMap.keySet());
final CustomExpandableListAdapter adapter = new CustomExpandableListAdapter(this, expandableListTitle, stringListHashMap, booleanList);
expandableListView.setAdapter(adapter);
filterDialog.show();
expandableListView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {
#Override
public void onGroupExpand(int groupPosition) {
Toast.makeText(getApplicationContext(),
expandableListTitle.get(groupPosition) + " List Expanded.",
Toast.LENGTH_SHORT).show();
}
});
expandableListView.setOnGroupCollapseListener(new ExpandableListView.OnGroupCollapseListener() {
#Override
public void onGroupCollapse(int groupPosition) {
Toast.makeText(getApplicationContext(),
expandableListTitle.get(groupPosition) + " List Collapsed.",
Toast.LENGTH_SHORT).show();
}
});
final boolean[] checked = {false};
final int[] lastClickedPosition = {0};
expandableListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
#Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
if (expandableListTitle.get(groupPosition).equalsIgnoreCase("Distance")) {
booleanList.add(childPosition, true);
setValueForSeletedFilter.put(expandableListTitle.get(groupPosition), booleanList);
expandableListView.setAdapter(adapter);
adapter.notifyDataSetChanged();
}
return false;
}
});
close.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
filterDialog.dismiss();
}
});
done.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
}
});
}
on the basis of header make list single or multi selection android.

getChildView() example for my case "Single selection"
#Override
public View getChildView(final int i, final int i1, boolean b, View view, ViewGroup viewGroup) {
View v = LayoutInflater.from(context).inflate(R.layout.expandablelv_child, null);
final CheckBox checkBox = v.findViewById(R.id.expandable_lv_child_cb);
RelativeLayout quantityContainer = v.findViewById(R.id.expandable_lv_child_quantity_cont);
final TextView textView = v.findViewById(R.id.expandable_lv_child_quantity_tv);
checkBox.setText(children.get(i).get(i1).getItemName());
double d=Double.parseDouble(children.get(i).get(i1).getMinQty());
int k=(int)d;
textView.setText(String.valueOf(k));
quantityContainer.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
QuantityDialog dialog = new QuantityDialog(context, children.get(i).get(i1).getMinQty(),
children.get(i).get(i1).getMaxQty(), new DialogSelectable() {
#Override
public void onQuantitySelected(String quantity) {
if (group[i].parent == 1 && group[i].child == i1)
textView.setText(quantity);
ExpandableLvAdapter.quantity[i] = quantity;
}
});
dialog.show();
}
});
try {
// if (model.children.get(i).size() < children.get(i).size()) {
try {
model.children.get(i).add(checkBox);
} catch (Exception e) {
ArrayList<CheckBox> temp = new ArrayList<>();
temp.add(checkBox);
model.children.add(temp);
}
//}
} catch (Exception e) {
try {
model.children.get(i).add(checkBox);
} catch (Exception ex) {
ArrayList<CheckBox> temp = new ArrayList<>();
temp.add(checkBox);
model.children.add(temp);
}
}
if (group[i].parent == 1) {
model.children.get(i).get(group[i].child).setEnabled(true);
model.children.get(i).get(group[i].child).setChecked(true);
model.disable(i, children.get(i).get(group[i].child).getItemName());
} else {
model.enable(i);
}
checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
if (b) {
group[i].parent = 1;
group[i].child = i1;
model.disable(i, children.get(i).get(i1).getItemName());
selected.add(children.get(i).get(i1));
quantity[i] = children.get(i).get(i1).getMaxQty();
} else {
group[i].parent = 0;
model.enable(i);
}
}
});
return v;
}

ExpandableListview Like TreeView Android

Hey people I'm Implementing TreeView using ExpandableListView. But I have some measure problem that I unfortunately can't solve it.
Here's ScreenShots of the problem:
You can see that there are problems in measuring. As long as I'm new to Android I don't really understand onMeasure() method.
I have 1 ExpandableListView and in it's getChildView() i return CustomExapndableListView-s.
Here's code:
ExpandableListAdapter :
public class ExpandableListAdapter extends BaseExpandableListAdapter {
private Context context;
private List<String> listDataHeader;
private HashMap<String, List<String>> listDataChild;
public ExpandableListAdapter (Context context, List<String> listDataHeader, HashMap<String, List<String>> listChildData) {
this.context = context;
this.listDataHeader = listDataHeader;
this.listDataChild = listChildData;
}
#Override
public int getGroupCount() {
return this.listDataHeader.size();
}
#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 Object getChild(int groupPosition, int childPosition) {
return this.listDataChild.get(this.listDataHeader.get(groupPosition)).get(childPosition);
}
#Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
#Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
#Override
public boolean hasStableIds() {
return false;
}
#Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
String headerTitle = (String) getGroup(groupPosition);
Log.i("Header: ", " " + headerTitle);
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 View getChildView(int groupPosition, 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);*/
String childText = (String) getChild(groupPosition, childPosition);
if(listDataChild.containsKey(childText)){
Log.i("Child", "" + childText);
CustomExpandableListView explv = new CustomExpandableListView(context);
// explv.setRows(calculateRowCount((String)getGroup(groupPosition), null));
// ChildLayerExpandableListAdapter adapter = new ChildLayerExpandableListAdapter(context, listDataChild.get(getGroup(groupPosition)), listDataChild);
Log.i("Opaaaa:", " " + getGroup(groupPosition));
List<String> newHeaders = new ArrayList <String>();
newHeaders.add(childText);
// listDataChild.get(getGroup(groupPosition))
ExpandableListAdapter adapter = new ExpandableListAdapter(context, newHeaders, listDataChild);
explv.setAdapter(adapter);
explv.setGroupIndicator(null);
convertView = explv;
convertView.setPadding(20, 0, 0, 0);
}else{
// if(convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.list_item, null);
// }
Log.i("Else:", " " + childText);
TextView txtListChild = (TextView) convertView.findViewById(R.id.lblListItem);
txtListChild.setText(childText);
convertView.setPadding(20, 0, 0, 0);
}
return convertView;
}
private int calculateRowCount (String key, ExpandableListView listView) {
int groupCount = listDataChild.get(key).size();
int rowCtr = 0;
for(int i = 0; i < groupCount; i++) {
rowCtr++;
if( (listView != null) && (listView.isGroupExpanded(i)))
rowCtr += listDataChild.get(listDataChild.get(key).get(i)).size() - 1;
}
return rowCtr;
}
#Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
CustomExpandableListView :
public class CustomExpandableListView extends ExpandableListView {
private static final int HEIGHT = 20;
private int rows;
public void setRows(int rows) {
this.rows = rows;
}
public CustomExpandableListView(Context context) {
super(context);
}
public CustomExpandableListView(Context context, AttributeSet attrs) {
super(context, attrs);
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
heightMeasureSpec = MeasureSpec.makeMeasureSpec(500, MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
// setMeasuredDimension(getMeasuredWidth(), rows * HEIGHT);
}
}
What I want to do is,when I expand the view, I want all children to be shown and I could just scroll down the ListView. Right now some children are hidden under different children.
Thanks in Advance for your Help.

#Code Word I'm sorry, I forgot to share my solution.
As I mentioned before I implemented treeView with ListView. Here is my source code.
TreeElementI.java :
public interface TreeElementI extends Serializable{
public void addChild(TreeElementI child);
public String getId();
public void setId(String id);
public String getOutlineTitle();
public void setOutlineTitle(String outlineTitle);
public boolean isHasParent();
public void setHasParent(boolean hasParent);
public boolean isHasChild();
public void setHasChild(boolean hasChild);
public int getLevel();
public void setLevel(int level);
public boolean isExpanded();
public void setExpanded(boolean expanded);
public ArrayList<TreeElementI> getChildList();
public TreeElementI getParent();
public void setParent(TreeElementI parent);
}
TreeElement.java :
public class TreeElement implements TreeElementI{
private String id;
private String outlineTitle;
private boolean hasParent;
private boolean hasChild;
private TreeElementI parent;
private int level;
private ArrayList<TreeElementI> childList;
private boolean expanded;
public TreeElement(String id, String outlineTitle) {
super();
this.childList = new ArrayList<TreeElementI>();
this.id = id;
this.outlineTitle = outlineTitle;
this.level = 0;
this.hasParent = true;
this.hasChild = false;
this.parent = null;
}
public TreeElement(String id, String outlineTitle, boolean hasParent, boolean hasChild, TreeElement parent, int level, boolean expanded) {
super();
this.childList = new ArrayList<TreeElementI>();
this.id = id;
this.outlineTitle = outlineTitle;
this.hasParent = hasParent;
this.hasChild = hasChild;
this.parent = parent;
if(parent != null) {
this.parent.getChildList().add(this);
}
this.level = level;
this.expanded = expanded;
}
#Override
public void addChild(TreeElementI child) {
this.getChildList().add(child);
this.setHasParent(false);
this.setHasChild(true);
child.setParent(this);
child.setLevel(this.getLevel() + 1);
}
#Override
public String getId() {
return this.id;
}
#Override
public void setId(String id) {
this.id = id;
}
#Override
public String getOutlineTitle() {
return this.outlineTitle;
}
#Override
public void setOutlineTitle(String outlineTitle) {
this.outlineTitle = outlineTitle;
}
#Override
public boolean isHasParent() {
return this.hasParent;
}
#Override
public void setHasParent(boolean hasParent) {
this.hasParent = hasParent;
}
#Override
public boolean isHasChild() {
return this.hasChild;
}
#Override
public void setHasChild(boolean hasChild) {
this.hasChild = hasChild;
}
#Override
public int getLevel() {
return this.level;
}
#Override
public void setLevel(int level) {
this.level = level;
}
#Override
public boolean isExpanded() {
return this.expanded;
}
#Override
public void setExpanded(boolean expanded) {
this.expanded = expanded;
}
#Override
public ArrayList<TreeElementI> getChildList() {
return this.childList;
}
#Override
public TreeElementI getParent() {
return this.parent;
}
#Override
public void setParent(TreeElementI parent) {
this.parent = parent;
}
}
TreeViewClassifAdapter.java :
public class TreeViewClassifAdapter extends BaseAdapter {
private static final int TREE_ELEMENT_PADDING_VAL = 25;
private List<TreeElementI> fileList;
private Context context;
private Bitmap iconCollapse;
private Bitmap iconExpand;
private Dialog dialog;
private EditText textLabel;
private XTreeViewClassif treeView;
public TreeViewClassifAdapter(Context context, List<TreeElementI> fileList, Dialog dialog, EditText textLabel, XTreeViewClassif treeView) {
this.context = context;
this.fileList = fileList;
this.dialog = dialog;
this.textLabel = textLabel;
this.treeView = treeView;
iconCollapse = BitmapFactory.decodeResource(context.getResources(), R.drawable.x_treeview_outline_list_collapse);
iconExpand = BitmapFactory.decodeResource(context.getResources(), R.drawable.x_treeview_outline_list_expand);
}
public List<TreeElementI> getListData() {
return this.fileList;
}
#Override
public int getCount() {
return this.fileList.size();
}
#Override
public Object getItem(int position) {
return this.fileList.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
convertView = View.inflate(context, R.layout.x_treeview_classif_list_item, null);
holder = new ViewHolder();
holder.setTextView((TextView) convertView.findViewById(R.id.text));
holder.setImageView((ImageView) convertView.findViewById(R.id.icon));
convertView.setTag(holder);
final TreeElementI elem = (TreeElementI) getItem(position);
int level = elem.getLevel();
holder.getIcon().setPadding(TREE_ELEMENT_PADDING_VAL * (level + 1), holder.icon.getPaddingTop(), 0, holder.icon.getPaddingBottom());
holder.getText().setText(elem.getOutlineTitle());
if (elem.isHasChild() && (elem.isExpanded() == false)) {
holder.getIcon().setImageBitmap(iconCollapse);
} else if (elem.isHasChild() && (elem.isExpanded() == true)) {
holder.getIcon().setImageBitmap(iconExpand);
} else if (!elem.isHasChild()) {
holder.getIcon().setImageBitmap(iconCollapse);
holder.getIcon().setVisibility(View.INVISIBLE);
}
IconClickListener iconListener = new IconClickListener(this, position);
TextClickListener txtListener = new TextClickListener((ArrayList<TreeElementI>) this.getListData(), position);
holder.getIcon().setOnClickListener(iconListener);
holder.getText().setOnClickListener(txtListener);
return convertView;
}
private class ViewHolder {
ImageView icon;
TextView text;
public TextView getText() {
return this.text;
}
public void setTextView(TextView text) {
this.text = text;
}
public ImageView getIcon() {
return this.icon;
}
public void setImageView(ImageView icon) {
this.icon = icon;
}
}
/**
* Listener For TreeElement Text Click
*/
private class TextClickListener implements View.OnClickListener {
private ArrayList<TreeElementI> list;
private int position;
public TextClickListener(ArrayList<TreeElementI> list, int position) {
this.list = list;
this.position = position;
}
#Override
public void onClick(View v) {
treeView.setXValue(String.valueOf(list.get(position).getId()));
dialog.dismiss();
}
}
/**
* Listener for TreeElement "Expand" button Click
*/
private class IconClickListener implements View.OnClickListener {
private ArrayList<TreeElementI> list;
private TreeViewClassifAdapter adapter;
private int position;
public IconClickListener(TreeViewClassifAdapter adapter, int position) {
this.list = (ArrayList<TreeElementI>) adapter.getListData();
this.adapter = adapter;
this.position = position;
}
#Override
public void onClick(View v) {
if (!list.get(position).isHasChild()) {
return;
}
if (list.get(position).isExpanded()) {
list.get(position).setExpanded(false);
TreeElementI element = list.get(position);
ArrayList<TreeElementI> temp = new ArrayList<TreeElementI>();
for (int i = position + 1; i < list.size(); i++) {
if (element.getLevel() >= list.get(i).getLevel()) {
break;
}
temp.add(list.get(i));
}
list.removeAll(temp);
adapter.notifyDataSetChanged();
} else {
TreeElementI obj = list.get(position);
obj.setExpanded(true);
int level = obj.getLevel();
int nextLevel = level + 1;
for (TreeElementI element : obj.getChildList()) {
element.setLevel(nextLevel);
element.setExpanded(false);
list.add(position + 1, element);
}
adapter.notifyDataSetChanged();
}
}
}
}
I hope it's not too late and this source code will help you.