Develop Reference

Android: Spinner and ListView with the same ArrayList

I'm trying to implement a selection activity for a given list of items. Each item is checkable, so I have an item with a TextView and a CheckBox. I implemented a ListView for displaying all the options and a Spinner for showing only the "Top Ten" choices, as a subset of the same list. For now I'm showing all the items in both ListView and Spinner.
I want for the items in the ListView to update when the user selects an item in the Spinner (Note: The reverse path works fine, as the Spinner grabs the updated ArrayList each time it dropsdown).
I tried to implement setOnItemSelectedListener for my Spinner, and to call notifyOnDataSetChanged() for my ListViewAdapter inside the Listener. But the Listener is only called on collapse and I get a weird (maybe unrelated) warning message.
The onItemSelectedListener for the Spinner only runs when the Spinner gets collapsed. But notifyOnDataSetChanged() seems to ignore the checked status of the items as a change. How can I make the first option run everytime I check an item and have the change get properly received by the ListAdapter?
Here's the Activity.java code:
public class TriageReasonActivity extends BaseActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_triage_reason);
final String[] select_qualification = {
"Select Qualification", "10th / Below", "12th", "Diploma", "UG",
"PG", "Phd"};
Spinner spinner = (Spinner) findViewById(R.id.top_reasons_spinner);
ListView symptoms_list = (ListView) findViewById(R.id.view_list_symptoms);
ArrayList<Symptoms> listVOs = new ArrayList<>();
for (int i = 0; i < select_qualification.length; i++) {
Symptoms reason = new Symptoms();
reason.setTitle(select_qualification[i]);
reason.setSelected(false);
listVOs.add(reason);
}
SymptomsListAdapter mListAdapter = new SymptomsListAdapter(this, 0,
listVOs);
SymptomsSpinnerAdapter mSpinnerAdapter = new SymptomsSpinnerAdapter(this, 0,
listVOs);
symptoms_list.setAdapter(mListAdapter);
spinner.setAdapter(mSpinnerAdapter);
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
Log.i("Item selected", "but not cahnged");
symptoms_list.invalidateViews();
mListAdapter.notifyDataSetInvalidated();
}
#Override
public void onNothingSelected(AdapterView<?> parentView) {
Log.i("Not item selected", "but actually it did");
}
});
}
The SpinnerCustom Adapter code:
public class SymptomsSpinnerAdapter extends ArrayAdapter<Symptoms>{
private Context mContext;
private ArrayList<Symptoms> listState;
private SymptomsSpinnerAdapter myAdapter;
private boolean isFromView = false;
/*#Override
public void notifyDataSetChanged() {
super.notifyDataSetChanged();
//mNotifyOnChange = true;
}*/
public SymptomsSpinnerAdapter(Context context, int resource, List<Symptoms> objects) {
super(context, resource, objects);
this.mContext = context;
this.listState = (ArrayList<Symptoms>) objects;
this.myAdapter = this;
}
#Override
public View getDropDownView(int position, View convertView,
ViewGroup parent) {
return getCustomView(position, convertView, parent);
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
return getCustomView(position, convertView, parent);
}
public View getCustomView(final int position, View convertView,
ViewGroup parent) {
final ViewHolder holder;
if (convertView == null) {
LayoutInflater layoutInflator = LayoutInflater.from(mContext);
convertView = layoutInflator.inflate(R.layout.item_reasons, null);
holder = new ViewHolder();
holder.mTextView = (TextView) convertView.findViewById(R.id.text);
holder.mCheckBox = (CheckBox) convertView.findViewById(R.id.checkbox);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.mTextView.setText(listState.get(position).getTitle());
// To check weather checked event fire from getview() or user input
isFromView = true;
holder.mCheckBox.setChecked(listState.get(position).isSelected());
isFromView = false;
if ((position == 0)) {
holder.mCheckBox.setVisibility(View.INVISIBLE);
} else {
holder.mCheckBox.setVisibility(View.VISIBLE);
}
holder.mCheckBox.setTag(position);
holder.mCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
int getPosition = (Integer) buttonView.getTag();
if (!isFromView) {
listState.get(position).setSelected(isChecked);
}
}
});
return convertView;
}
#Override
public int getCount() {
return listState.size();
}
#Override
public Symptoms getItem(int position) {
if( position < 1 ) {
return null;
}
else {
return listState.get(position-1);
}
}
#Override
public long getItemId(int position) {
return 0;
}
private class ViewHolder {
private TextView mTextView;
private CheckBox mCheckBox;
}
}
Here's the (almost identical) ListAdapter:
public class SymptomsListAdapter extends BaseAdapter implements ListAdapter {
private Context mContext;
private ArrayList<Symptoms> listState;
private boolean isFromView = false;
public SymptomsListAdapter(Context context, int resource, List<Symptoms> objects) {
this.mContext = context;
this.listState = (ArrayList<Symptoms>) objects;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
return getCustomView(position, convertView, parent);
}
public View getCustomView(final int position, View convertView,
ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
LayoutInflater layoutInflator = LayoutInflater.from(mContext);
convertView = layoutInflator.inflate(R.layout.item_reasons, null);
holder = new SymptomsListAdapter.ViewHolder();
holder.mTextView = (TextView) convertView.findViewById(R.id.text);
holder.mCheckBox = (CheckBox) convertView.findViewById(R.id.checkbox);
convertView.setTag(holder);
} else {
holder = (SymptomsListAdapter.ViewHolder) convertView.getTag();
}
holder.mTextView.setText(listState.get(position).getTitle());
// To check weather checked event fire from getview() or user input
isFromView = true;
holder.mCheckBox.setChecked(listState.get(position).isSelected());
isFromView = false;
if ((position == 0)) {
holder.mCheckBox.setVisibility(View.INVISIBLE);
} else {
holder.mCheckBox.setVisibility(View.VISIBLE);
}
holder.mCheckBox.setTag(position);
holder.mCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
int getPosition = (Integer) buttonView.getTag();
if (!isFromView) {
listState.get(position).setSelected(isChecked);
}
}
});
return convertView;
}
#Override
public int getCount() {
return listState.size();
}
#Override
public Symptoms getItem(int position) {
if( position < 1 ) {
return null;
}
else {
return listState.get(position-1);
}
}
#Override
public long getItemId(int position) {
return 0;
}
private class ViewHolder {
public TextView mTextView;
public CheckBox mCheckBox;
}
}
And here's the warning I'm getting:
W/art: Before Android 4.1, method int android.support.v7.widget.DropDownListView.lookForSelectablePosition(int, boolean) would have incorrectly overridden the package-private method in android.widget.ListView
EDIT: Adding the layouts and the model class in case they may cause an issue:
Activity Layout:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="demo.hb.activity.visit.TriageReasonActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textFontWeight="6dp"
android:textSize="30sp"
android:layout_margin="20dp"
android:textAlignment="center"
android:textColor="#000000"
android:text="What is the reason for your visit?" />
<Spinner
android:id="#+id/top_reasons_spinner"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#android:drawable/btn_dropdown"
android:spinnerMode="dropdown"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_gravity="end">
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/view_list_symptoms"
android:layout_above="#+id/next_btn"
android:layout_alignParentTop="true"/>
</RelativeLayout>
</LinearLayout>
</FrameLayout>
Item layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:id="#+id/text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="20dp"
android:text="text"
android:textAlignment="gravity" />
<CheckBox
android:id="#+id/checkbox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true" />
</RelativeLayout>
Model Class:
public class Symptoms {
private String title;
private boolean selected;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public boolean isSelected() {
return selected;
}
public void setSelected(boolean selected) {
this.selected = selected;
}
}

The reason that nothing is changing is because you haven't implemented the method to handle the data set changes. You need to handle how the data is reloaded in your adapter:
public class SymptomsListAdapter extends BaseAdapter implements ListAdapter {
...
public void refreshData(ArrayList<Symptoms> objects){
this.listState = (ArrayList<Symptoms>) objects;
notifyDataSetChanged();
}
...
}
This link does a great job of explaining how the notifyDataSetInvalidated() works (or in your case, why it's not working).

Values of counter changes after scrolling ExpendableListView

I have an ExpandableListView of items and on list item I have TextView with two buttons to increment or decrements the value in TextView on clicks. The problem occurs every time I try to scroll the list. If I increment one item and then scroll the list the values get mixed (becouse the ListView keeps recycling its views) and I don't know how to fix it.
I have tried many soulutions I have found here, so yes this may be a duplicate, but I wasn't able to solve my problem with any method I have found.
My ExpandableListAdapter.java
import android.content.Context;
import android.graphics.Typeface;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.Button;
import android.widget.TextView;
import java.util.HashMap;
import java.util.List;
public class ExpandableListAdapter extends BaseExpandableListAdapter {
public static class ViewHolder {
TextView childText;
TextView counterText;
Button addItemButton;
Button deleteItemButton;
int quantity = 0;
}
private Context context;
private List<String> listDataHeader;
private HashMap<String, List<String>> listHashMap;
public ExpandableListAdapter(Context context, List<String> listDataHeader, HashMap<String, List<String>> listHashMap) {
this.context = context;
this.listDataHeader = listDataHeader;
this.listHashMap = listHashMap;
}
#Override
public int getGroupCount() {
return listDataHeader.size();
}
#Override
public int getChildrenCount(int groupPosition) {
return listHashMap.get(listDataHeader.get(groupPosition)).size();
}
#Override
public Object getGroup(int groupPosition) {
return listDataHeader.get(groupPosition);
}
#Override
public Object getChild(int groupPosition, int childPosition) {
return listHashMap.get(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);
if(convertView == null) {
LayoutInflater inflater = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.list_group, null);
}
TextView listHeader = (TextView) convertView.findViewById(R.id.list_header);
listHeader.setTypeface(null, Typeface.BOLD);
listHeader.setText(headerTitle);
return convertView;
}
#Override
public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
final ViewHolder viewHolder;
if(convertView == null) {
LayoutInflater inflater = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.list_item, null);
TextView textListChild = (TextView) convertView.findViewById(R.id.list_item_header);
TextView itemsCounter = (TextView) convertView.findViewById(R.id.items_counter);
Button addItemButton = (Button) convertView.findViewById(R.id.plus_btn);
viewHolder = new ViewHolder();
viewHolder.childText = textListChild;
viewHolder.counterText = itemsCounter;
viewHolder.addItemButton = addItemButton;
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
final String childText = (String) getChild(groupPosition, childPosition);
viewHolder.childText.setText(childText);
viewHolder.addItemButton.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v) {
//int itemCount = Integer.parseInt((String)viewHolder.counterText.getText());
//itemCount++;
viewHolder.quantity++;
viewHolder.counterText.setText( Integer.toString(viewHolder.quantity));
PutOrderDrinks.addOrder(childText);
}
});
return convertView;
}
#Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}

It is not a good idea to store quantity in ViewHolder.
Hope below sample helps :)
MainActivity.java:
public class MainActivity extends Activity {
Button clearChecks, putOrder;
ExpandableListView expandableListView;
ExpandableListViewAdapter expandableListAdapter;
int lastExpandedPosition = -1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
expandableListView = findViewById(R.id.expandedListView);
clearChecks = findViewById(R.id.btnClearChecks);
putOrder = findViewById(R.id.btnPutOrder);
List<String> listTitle = genGroupList();
expandableListAdapter = new ExpandableListViewAdapter(this, listTitle, genChildList(listTitle));
expandableListView.setAdapter(expandableListAdapter);
expandableListView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {
#Override
public void onGroupExpand(int groupPosition) {
if(lastExpandedPosition != -1 && (lastExpandedPosition != groupPosition)){
expandableListView.collapseGroup(lastExpandedPosition);
}
lastExpandedPosition = groupPosition;
}
});
clearChecks.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
expandableListAdapter.clearChecks();
}
});
putOrder.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
ArrayList<ChildItemSample> putOrder = expandableListAdapter.getOrderList();
String msg = "";
for(int i=0; i<putOrder.size(); i++){
msg += putOrder.get(i).getName() + ": " + putOrder.get(i).getQty() + "\n";
}
Toast.makeText(getBaseContext(), msg, Toast.LENGTH_LONG).show();
}
});
}
private ArrayList<String> genGroupList(){
ArrayList<String> listGroup = new ArrayList<>();
for(int i=1; i<10; i++){
listGroup.add("Group: " + i);
}
return listGroup;
}
private Map<String, List<ChildItemSample>> genChildList(List<String> header){
Map<String, List<ChildItemSample>> listChild = new HashMap<>();
for(int i=0; i<header.size(); i++){
List<ChildItemSample> testDataList = new ArrayList<>();
int a = (int)(Math.random()*8);
for(int j=0; j<a; j++){
ChildItemSample testItem = new ChildItemSample("Child " + (j + 1), 0);
testDataList.add(testItem);
}
listChild.put(header.get(i), testDataList);
}
return listChild;
}
}
ChildItemSample.java:
public class ChildItemSample {
private boolean checked = false;
private String name;
private int qty;
public int getQty() {
return qty;
}
public void setQty(int qty) {
this.qty = qty;
}
public boolean isChecked() {
return checked;
}
public void setChecked(boolean checked) {
this.checked = checked;
}
public String getName() {
return name;
}
public ChildItemSample(String name, int qty){
this.name = name;
this.qty = qty;
}
}
ExpandableListViewAdapter.java:
public class ExpandableListViewAdapter extends BaseExpandableListAdapter {
private Context context;
private List<String> listGroup;
private Map<String, List<ChildItemSample>> listChild;
private int checkedBoxesCount;
private boolean[] checkedGroup;
public ExpandableListViewAdapter(Context context, List<String> listGroup, Map<String,
List<ChildItemSample>> listChild) {
this.context = context;
this.listGroup = listGroup;
this.listChild = listChild;
checkedBoxesCount = 0;
checkedGroup = new boolean[listGroup.size()];
}
#Override
public int getGroupCount() {
return listGroup.size();
}
#Override
public int getChildrenCount(int groupPosition) {
return listChild.get(listGroup.get(groupPosition)).size();
}
#Override
public String getGroup(int groupPosition) {
return listGroup.get(groupPosition);
}
#Override
public ChildItemSample getChild(int groupPosition, int childPosition) {
return listChild.get(listGroup.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 b, View view, ViewGroup viewGroup) {
String itemGroup = getGroup(groupPosition);
GroupViewHolder groupViewHolder;
if(view == null){
LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.expanded_list_group, null);
groupViewHolder = new GroupViewHolder();
groupViewHolder.tvGroup = view.findViewById(R.id.tv_group);
groupViewHolder.cbGroup = view.findViewById(R.id.cb_group);
groupViewHolder.cbGroup.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
int pos = (int)view.getTag();
checkedGroup[pos] = !checkedGroup[pos];
for(ChildItemSample item : listChild.get(listGroup.get(pos))){
item.setChecked(checkedGroup[pos]);
}
notifyDataSetChanged();
}
});
view.setTag(groupViewHolder);
}else {
groupViewHolder = (GroupViewHolder)view.getTag();
}
groupViewHolder.tvGroup.setText(String.format("%s (%d)", itemGroup, getChildrenCount(groupPosition)));
if(checkedGroup[groupPosition]) groupViewHolder.cbGroup.setChecked(true);
else groupViewHolder.cbGroup.setChecked(false);
groupViewHolder.cbGroup.setTag(groupPosition);
return view;
}
#Override
public View getChildView(int groupPosition, int childPosition, boolean b, View view, ViewGroup viewGroup) {
ChildItemSample expandedListText = getChild(groupPosition,childPosition);
ChildViewHolder childViewHolder;
if(view == null){
LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.expanded_list_item, null);
childViewHolder = new ChildViewHolder();
childViewHolder.tvChild = view.findViewById(R.id.tv_child);
childViewHolder.cbChild = view.findViewById(R.id.cb_child);
childViewHolder.tvQty = view.findViewById(R.id.tv_qty);
childViewHolder.btInc = view.findViewById(R.id.bt_inc);
childViewHolder.btDec = view.findViewById(R.id.bt_dec);
childViewHolder.cbChild.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
CheckBox cb = (CheckBox) view;
Pos pos = (Pos) cb.getTag();
ChildItemSample selectedItem = getChild(pos.group, pos.child);
selectedItem.setChecked(cb.isChecked());
if(cb.isChecked()){
checkedBoxesCount++;
Toast.makeText(context,"Checked value is: " + getChild(pos.group, pos.child).getName(),
Toast.LENGTH_SHORT).show();
}else {
checkedBoxesCount--;
if(checkedBoxesCount == 0){
Toast.makeText(context,"nothing checked",Toast.LENGTH_SHORT).show();
}else {
Toast.makeText(context,"unchecked",Toast.LENGTH_SHORT).show();
}
}
notifyDataSetChanged();
}
});
childViewHolder.btInc.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Button bt = (Button) view;
Pos pos = (Pos) bt.getTag();
ChildItemSample selectedItem = getChild(pos.group, pos.child);
selectedItem.setQty(selectedItem.getQty() + 1);
notifyDataSetChanged();
}
});
childViewHolder.btDec.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Button bt = (Button) view;
Pos pos = (Pos) bt.getTag();
ChildItemSample selectedItem = getChild(pos.group, pos.child);
if(selectedItem.getQty() > 0) selectedItem.setQty(selectedItem.getQty() - 1);
notifyDataSetChanged();
}
});
}else {
childViewHolder = (ChildViewHolder)view.getTag();
}
childViewHolder.cbChild.setChecked(expandedListText.isChecked());
childViewHolder.tvChild.setText(expandedListText.getName() + " :");
childViewHolder.tvQty.setText("" + expandedListText.getQty());
childViewHolder.cbChild.setTag(new Pos(groupPosition, childPosition));
childViewHolder.btInc.setTag(new Pos(groupPosition, childPosition));
childViewHolder.btDec.setTag(new Pos(groupPosition, childPosition));
view.setTag(childViewHolder);
return view;
}
public void clearChecks() {
for(int i=0; i<checkedGroup.length; i++) checkedGroup[i] = false;
for(List<ChildItemSample> value : listChild.values()) {
for (ChildItemSample sample : value) {
sample.setChecked(false);
}
}
checkedBoxesCount = 0;
notifyDataSetChanged();
}
#Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
private class GroupViewHolder {
CheckBox cbGroup;
TextView tvGroup;
}
private class ChildViewHolder {
CheckBox cbChild;
TextView tvChild;
TextView tvQty;
Button btInc;
Button btDec;
}
private class Pos {
int group;
int child;
Pos(int group, int child){
this.group = group;
this.child = child;
}
}
public ArrayList<ChildItemSample> getOrderList(){
ArrayList<ChildItemSample> overallOrder = new ArrayList<>();
for(int i=0; i<getGroupCount(); i++){
for(int j=0; j<getChildrenCount(i); j++){
if(getChild(i,j).getQty() > 0){
ChildItemSample newOrder = new ChildItemSample(getGroup(i) + ">" +
getChild(i, j).getName(), getChild(i, j).getQty());
overallOrder.add(newOrder);
}
}
}
return overallOrder;
}
}
activity_main.xml:
<?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="match_parent"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:id="#+id/btnClearChecks"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Clear Checks" />
<Button
android:id="#+id/btnPutOrder"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Put Order" />
</LinearLayout>
<ExpandableListView
android:id="#+id/expandedListView"
android:layout_width="match_parent"
android:layout_height="match_parent">
</ExpandableListView>
</LinearLayout>
expanded_list_group.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:descendantFocusability="blocksDescendants" >
<CheckBox
android:id="#+id/cb_group"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="40dp"
android:layout_gravity="center_vertical" />
<TextView
android:id="#+id/tv_group"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Text"
android:textSize="30sp" />
</LinearLayout>
expanded_list_item.xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<CheckBox
android:id="#+id/cb_child"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_centerVertical="true"
android:layout_marginLeft="60dp" />
<TextView
android:id="#+id/tv_child"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_toRightOf="#+id/cb_child"
android:text="Child: "
android:textSize="20sp" />
<TextView
android:id="#+id/tv_qty"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_toRightOf="#+id/tv_child"
android:text="0"
android:textSize="20sp" />
<Button
android:id="#+id/bt_inc"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toLeftOf="#+id/bt_dec"
android:text="+" />
<Button
android:id="#+id/bt_dec"
android:layout_marginRight="10dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:text="-" />
</RelativeLayout>

Try this adapter:
public class ExpandableListAdapter extends BaseExpandableListAdapter {
class ViewHolder {
TextView childText;
TextView counterText;
Button addItemButton;
Button deleteItemButton;
}
class ChildItem{
String name;
int quantity;
ChildItem(String name, int quantity){
this.name = name;
this.quantity = quantity;
}
}
class Pos{
int group;
int child;
Pos(int group, int child){
this.group = group;
this.child = child;
}
}
private Context context;
private List<String> listDataHeader;
//private HashMap<String, List<String>> listHashMap;
private HashMap<String, List<ChildItem>> listChildMap;
public ExpandableListAdapter(Context context, List<String> listDataHeader, HashMap<String, List<String>> listHashMap) {
this.context = context;
this.listDataHeader = listDataHeader;
listChildMap = new HashMap<>();
for(int i=0; i<getGroupCount(); i++){
List<ChildItem> listTemp = new ArrayList<>();
for(int j=0; j<listHashMap.get(listDataHeader.get(i)).size(); j++){
listTemp.add(new ChildItem(listHashMap.get(listDataHeader.get(i)).get(j), 0));
}
listChildMap.put(listDataHeader.get(i), listTemp);
}
}
#Override
public int getGroupCount() {
return listDataHeader.size();
}
#Override
public int getChildrenCount(int groupPosition) {
return listChildMap.get(listDataHeader.get(groupPosition)).size();
}
#Override
public String getGroup(int groupPosition) {
return listDataHeader.get(groupPosition);
}
#Override
public ChildItem getChild(int groupPosition, int childPosition) {
return listChildMap.get(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 = getGroup(groupPosition);
if(convertView == null) {
LayoutInflater inflater = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.list_group, null);
}
TextView listHeader = (TextView) convertView.findViewById(R.id.list_header);
listHeader.setTypeface(null, Typeface.BOLD);
listHeader.setText(headerTitle);
return convertView;
}
#Override
public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
ViewHolder viewHolder;
if(convertView == null) {
LayoutInflater inflater = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.list_item, null);
TextView textListChild = (TextView) convertView.findViewById(R.id.list_item_header);
TextView itemsCounter = (TextView) convertView.findViewById(R.id.items_counter);
Button addItemButton = (Button) convertView.findViewById(R.id.plus_btn);
viewHolder = new ViewHolder();
viewHolder.childText = textListChild;
viewHolder.counterText = itemsCounter;
viewHolder.addItemButton = addItemButton;
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
ChildItem child = getChild(groupPosition, childPosition);
viewHolder.childText.setText(child.name);
viewHolder.counterText.setText("" + child.quantity);
viewHolder.addItemButton.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v) {
Pos pos = (Pos)v.getTag();
ChildItem selectedItem = getChild(pos.group, pos.child);
selectedItem.quantity = selectedItem.quantity + 1;
notifyDataSetChanged();
PutOrderDrinks.addOrder(selectedItem.name);
}
});
viewHolder.addItemButton.setTag(new Pos(groupPosition, childPosition));
convertView.setTag(viewHolder);
return convertView;
}
#Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}

Why is my custom adapter rejecting ArrayList?

I'm attempting to create a custom adapter to display information from an ArrayList in a list view, but it seems to be rejecting an ArrayList, instead asking for just an array. Here is my faulty code:
ArrayList
public ArrayList<Ing> IngList = new ArrayList<>();
public ArrayList<Ing> get(){
return this.IngList;
}
Object Class
public class Ing {
int init;
double value;
String name;
String unit;
String quantity;
public String getName() { return name; }
public void setName(String name) { this.name = name;}
public double getValue(){ return value; }
public void setValue(double value){ this.value = value; }
public int getInit(){ return init; }
public void setInit(int init){ this.init = init; }
public String getUnit(){ return unit; }
public void setUnit(String unit){ this.unit = unit; }
public String getQuantity(){ return quantity; }
public void setQuantity(String quantity){ this.quantity = quantity; }
Ing(String name, double value, int init, String unit, String quantity) {
this.name = name;
this.value = value;
this.init = init;
this.unit = unit;
this.quantity = quantity;
}
}
ListAdapter
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;
import java.util.ArrayList;
public class ListAdapter extends ArrayAdapter<Ing> {
private Context context;
private Ing[] values = null;
public static Kitchen kitchen = new Kitchen();
public ListAdapter(Context context, int textViewResourceId, Ing[] values) {
super(context, textViewResourceId, values);
this.context = context;
this.values = values;
}
public int getCount(){
return values.length;
}
public Ing getItem(int position){
return values[position];
}
public long getItemId(int position){
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
convertView = LayoutInflater.from(getContext()).inflate(R.layout.row_layout, parent, false);
}
TextView name = (TextView) convertView.findViewById(R.id.name);
TextView value = (TextView) convertView.findViewById(R.id.value);
TextView unit = (TextView) convertView.findViewById(R.id.unit);
name.setText(kitchen.IngList.get(position).getName());
value.setText(kitchen.IngList.get(position).getQuantity());
unit.setText(kitchen.IngList.get(position).getUnit());
return convertView;
}
}
Assigning adapter
final ListAdapter adapter = new ListAdapter(getContext(),
R.layout.row_layout, IngList);
//error is in line above
final ListView listView = (ListView) root.findViewById(R.id.list);
listView.setAdapter(adapter);
row layout
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="10dp"
android:paddingTop="10dp"
android:paddingRight="10dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/name"
android:text="Name"
android:textAppearance="?android:attr/textAppearanceLarge"
android:layout_alignParentTop="true"
android:ellipsize="end"
android:maxLines="1"
android:layout_marginBottom="2dp"
android:layout_marginLeft="10dp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/value"
android:textAppearance="?android:attr/textAppearanceLarge"
android:layout_alignParentTop="true"
android:maxLines="1"
android:layout_toEndOf="#+id/name"
android:layout_toRightOf="#+id/name"
android:text="Value"
android:layout_marginLeft="50dp"
android:layout_marginBottom="2dp"
android:ellipsize="end"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/unit"
android:textAppearance="?android:attr/textAppearanceLarge"
android:layout_alignParentTop="true"
android:maxLines="1"
android:layout_toEndOf="#+id/value"
android:layout_toRightOf="#+id/value"
android:text="Unit"
android:layout_marginLeft="5dp"
android:layout_marginBottom="2dp"
android:ellipsize="end"/>
Sorry if I posted more than I needed to. I also apologize in advance for being kind of dumb when it comes to organizing code. Thanks a million to anyone who can find out what's wrong here.

Your Modified ListAdapter
public class ListAdapter extends ArrayAdapter<Ing> {
private Context context;
private ArrayList<Ing> values = new ArrayList<>();
public static Kitchen kitchen = new Kitchen();
public ListAdapter(Context context, int textViewResourceId, ArrayList<Ing> values) {
super(context, textViewResourceId, values);
this.context = context;
this.values = values;
}
public int getCount(){
return values.size();
}
public Ing getItem(int position){
return values.get(position);
}
public long getItemId(int position){
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
convertView = LayoutInflater.from(getContext()).inflate(R.layout.row_layout, parent, false);
}
TextView name = (TextView) convertView.findViewById(R.id.name);
TextView value = (TextView) convertView.findViewById(R.id.value);
TextView unit = (TextView) convertView.findViewById(R.id.unit);
name.setText(kitchen.IngList.get(position).getName());
value.setText(kitchen.IngList.get(position).getQuantity());
unit.setText(kitchen.IngList.get(position).getUnit());
return convertView;
}
}
I also don't understand why you have used kitchen.IngList for getting the ArrayList for populating your list. You can use values instead of kitchen.IngList

Like #mark-keen and #mike-m have say, your adapter constructor is expecting Array but you giving it an ArrayList.
You create the adapter with:
public ArrayList<Ing> IngList = new ArrayList<>();
...
final ListAdapter adapter = new ListAdapter(getContext(), R.layout.row_layout, IngList);
But your Adapter constructor is only accepting Array:
public class ListAdapter extends ArrayAdapter<Ing> {
...
private Ing[] values = null;
public ListAdapter(Context context, int textViewResourceId, Ing[] values) {
...
}
}
So, you need to change your constructor to accept the ArrayList as its parameter. Something like this:
public class ListAdapter extends ArrayAdapter<Ing> {
private Context context;
// don't need to create object for values
// because it depends on the parameter value.
private ArrayList<Ing> values;
...
public ListAdapter(Context context, int textViewResourceId, ArrayList<Ing> values) {
super(context, textViewResourceId, values);
this.context = context;
this.values = values;
}
...
}

How to add Three Level ListView in ExpandableListView in android

I want to add one more level of in ExpandableListView.In current ExpandableListView is two level how can i add one more level. I am new in android developing please help me. Thanks in advance!
My MainActivity.java:-
private Toolbar mToolbar;
ExpandableListAdapter listAdapter;
ExpandableListView expListView;
List<String> listDataHeader;
HashMap<String, List<String>> listDataChild;
// private FragmentDrawer drawerFragment;
ArrayList<String> arraylist1,arraylist2,arraylist3,arrayList4,arrayList5;
int cnt = 0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mToolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(mToolbar);
getSupportActionBar().setDisplayShowHomeEnabled(true);
expListView = (ExpandableListView) findViewById(R.id.lvExp);
// preparing list data
prepareListData();
listAdapter = new ExpandableListAdapter(this, listDataHeader, listDataChild);
// setting list adapter
expListView.setAdapter(listAdapter);
/* drawerFragment = (FragmentDrawer)
getSupportFragmentManager().findFragmentById(R.id.fragment_navigation_drawer);
drawerFragment.setUp(R.id.fragment_navigation_drawer, (DrawerLayout) findViewById(R.id.drawer_layout), mToolbar);
drawerFragment.setDrawerListener(this);*/
// display the first navigation drawer view on app launch
// displayView(0);
Log.d("oncreate method", "");
arraylist1 = new ArrayList<String>();
arraylist2 = new ArrayList<String>();
arraylist3 = new ArrayList<String>();
arrayList4 = new ArrayList<String>();
arrayList5 = new ArrayList<String>();
new ProductsAsynTask().execute("http://opencart.codeniques.com/shopping/?route=feed/web_api/menu&key=test123$");
}
private void prepareListData() {
listDataHeader = new ArrayList<String>();
listDataChild = new HashMap<String, List<String>>();
// Adding child data
listDataHeader.add("Top 250");
listDataHeader.add("Now Showing");
listDataHeader.add("Coming Soon..");
// Adding child data
List<String> top250 = new ArrayList<String>();
top250.add("The Shawshank Redemption");
top250.add("The Godfather");
top250.add("The Godfather: Part II");
top250.add("Pulp Fiction");
top250.add("The Good, the Bad and the Ugly");
top250.add("The Dark Knight");
top250.add("12 Angry Men");
List<String> nowShowing = new ArrayList<String>();
nowShowing.add("The Conjuring");
nowShowing.add("Despicable Me 2");
nowShowing.add("Turbo");
nowShowing.add("Grown Ups 2");
nowShowing.add("Red 2");
nowShowing.add("The Wolverine");
List<String> comingSoon = new ArrayList<String>();
comingSoon.add("2 Guns");
comingSoon.add("The Smurfs 2");
comingSoon.add("The Spectacular Now");
comingSoon.add("The Canyons");
comingSoon.add("Europa Report");
listDataChild.put(listDataHeader.get(0), top250); // Header, Child data
listDataChild.put(listDataHeader.get(1), nowShowing);
listDataChild.put(listDataHeader.get(2), comingSoon);
}
public class ProductsAsynTask extends AsyncTask<String,Void,Void>{
ProgressDialog dialog;
protected void onPreExecute(){
super.onPreExecute();
Log.d("In onPreExceute","");
dialog = new ProgressDialog(MainActivity.this);
dialog.setMessage("Loading, Please wait");
dialog.setTitle("Connecting server");
dialog.show();
dialog.setCancelable(false);
}
protected Void doInBackground(String... param){
try{
Log.d("In doInBackground","");
HttpClient client= new DefaultHttpClient();
HttpPost post = new HttpPost(param[0]);
HttpResponse response = client.execute(post);
int status = response.getStatusLine().getStatusCode();
if(status == 200){
Log.d("Status",""+status);
HttpEntity entity = response.getEntity();
String data = EntityUtils.toString(entity);
JSONObject jsonObject = new JSONObject(data);
JSONArray jArray = jsonObject.getJSONArray("categories");
for(int i = 0;i < jArray.length();i++){
cnt++;
Log.d("value of array",jArray.length()+"");
Log.d("Value of i",""+i);
JSONObject jsonObject1 = jArray.getJSONObject(i);
arraylist1.add(jsonObject1.getString("name"));
//data1 = jsonObject1.getString("name");
// Log.d("hello ",data1);
JSONArray jsonArray = jsonObject1.getJSONArray("children");
// JSONObject jsonObject2 = jsonObject1.getJSONObject("children");
for(int j=0;j<jsonArray.length();j++){
JSONObject jsonObject2 = jsonArray.getJSONObject(j);
arraylist2.add(jsonObject2.getString("name"));
// data2 = jsonObject2.getString("name");
JSONArray jsonArray1 = jsonObject2.getJSONArray("children_lv3");
for(int k=0;k<jsonArray1.length();k++){
JSONObject jsonObject3 = jsonArray1.getJSONObject(k);
arraylist3.add(jsonObject3.getString("name"));
arrayList4.add(jsonObject3.getString("href"));
/* data3 = jsonObject3.getString("name");
data4 = jsonObject3.getString("href"); */
}
arrayList5.add(jsonObject2.getString("href"));
// data5 = jsonObject2.getString("href");
}
}
}
}catch(IOException e){
Log.e("Error IOException :",e.getMessage());
}catch (JSONException e){
Log.e("Error JSONException",e.getMessage());
}
return null;
}
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
dialog.dismiss();
Log.d("Counter value",""+cnt);
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
if(id == R.id.action_search){
Toast.makeText(getApplicationContext(), "Search action is selected!", Toast.LENGTH_SHORT).show();
return true;
}
return super.onOptionsItemSelected(item);
}
/* public void onDrawerItemSelected(View view, int position) {
displayView(position);
}
private void displayView(int position) {
Fragment fragment = null;
String title = getString(R.string.app_name);
switch (position) {
case 0:
fragment = new HomeFragment();
title = getString(R.string.title_home);
break;
case 1:
fragment = new FriendsFragment();
title = getString(R.string.title_friends);
break;
case 2:
fragment = new MessagesFragment();
title = getString(R.string.title_messages);
break;
default:
break;
}
if (fragment != null) {
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.container_body, fragment);
fragmentTransaction.commit();
// set the toolbar title
getSupportActionBar().setTitle(title);
}
}*/}
My ExpandableListAdapter.java is here:-
public class ExpandableListAdapter 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 ExpandableListAdapter(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.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;
}}
My activity_main.xml is here:-
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/drawer_layout"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:id="#+id/container_toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<include
android:id="#+id/toolbar"
layout="#layout/toolbar" />
</LinearLayout>
<FrameLayout
android:id="#+id/container_body"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1" />
</LinearLayout>
<ExpandableListView
android:id="#+id/lvExp"
android:layout_height="match_parent"
android:layout_width="260dp"
android:layout_gravity="start"/>
<!-- <fragment
android:id="#+id/fragment_navigation_drawer"
android:name="com.android.ShoppingMazza.activity.ExpandableListAdapter"
android:layout_width="#dimen/nav_drawer_width"
android:layout_height="match_parent"
android:layout_gravity="start"
app:layout="#layout/fragment_navigation_drawer"
tools:layout="#layout/fragment_navigation_drawer" /> -->
</android.support.v4.widget.DrawerLayout>

You can try my following sample code. I have posted my full project to GitHub
Of course, you should modify more to meet all your requirements. For basic case, I only use the data source in the arrays.xml file. Hope this helps!
arrays.xml:
<resources>
<string-array name="items_array_expandable_level_one">
<item>Level 1.1</item>
<item>Level 1.2</item>
<item>Level 1.3</item>
</string-array>
<string-array name="items_array_expandable_level_one_one_child">
<item>Level 1.1.1</item>
<item>Level 1.1.2</item>
</string-array>
<string-array name="items_array_expandable_level_one_two_child">
<item>Level 1.2.1</item>
</string-array>
<string-array name="items_array_expandable_other_child">
<item>Second Level 01</item>
<item>Second Level 02</item>
<item>Second Level 03</item>
</string-array>
<string-array name="items_array_expandable_level_three">
<item>Child Level 01</item>
<item>Child Level 02</item>
</string-array>
</resources>
CustomExpListView.java:
public class CustomExpListView extends ExpandableListView
{
public CustomExpListView(Context context)
{
super(context);
}
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
widthMeasureSpec = MeasureSpec.makeMeasureSpec(960, MeasureSpec.AT_MOST);
heightMeasureSpec = MeasureSpec.makeMeasureSpec(600, MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}
ParentLevelAdapter.java:
public class ParentLevelAdapter extends BaseExpandableListAdapter {
private final Context mContext;
private final List<String> mListDataHeader;
private final Map<String, List<String>> mListData_SecondLevel_Map;
private final Map<String, List<String>> mListData_ThirdLevel_Map;
public ParentLevelAdapter(Context mContext, List<String> mListDataHeader) {
this.mContext = mContext;
this.mListDataHeader = new ArrayList<>();
this.mListDataHeader.addAll(mListDataHeader);
// Init second level data
String[] mItemHeaders;
mListData_SecondLevel_Map = new HashMap<>();
int parentCount = mListDataHeader.size();
for (int i = 0; i < parentCount; i++) {
String content = mListDataHeader.get(i);
switch (content) {
case "Level 1.1":
mItemHeaders = mContext.getResources().getStringArray(R.array.items_array_expandable_level_one_one_child);
break;
case "Level 1.2":
mItemHeaders = mContext.getResources().getStringArray(R.array.items_array_expandable_level_one_two_child);
break;
default:
mItemHeaders = mContext.getResources().getStringArray(R.array.items_array_expandable_other_child);
}
mListData_SecondLevel_Map.put(mListDataHeader.get(i), Arrays.asList(mItemHeaders));
}
// THIRD LEVEL
String[] mItemChildOfChild;
List<String> listChild;
mListData_ThirdLevel_Map = new HashMap<>();
for (Object o : mListData_SecondLevel_Map.entrySet()) {
Map.Entry entry = (Map.Entry) o;
Object object = entry.getValue();
if (object instanceof List) {
List<String> stringList = new ArrayList<>();
Collections.addAll(stringList, (String[]) ((List) object).toArray());
for (int i = 0; i < stringList.size(); i++) {
mItemChildOfChild = mContext.getResources().getStringArray(R.array.items_array_expandable_level_three);
listChild = Arrays.asList(mItemChildOfChild);
mListData_ThirdLevel_Map.put(stringList.get(i), listChild);
}
}
}
}
#Override
public Object getChild(int groupPosition, int childPosition) {
return 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) {
final CustomExpListView secondLevelExpListView = new CustomExpListView(this.mContext);
String parentNode = (String) getGroup(groupPosition);
secondLevelExpListView.setAdapter(new SecondLevelAdapter(this.mContext, mListData_SecondLevel_Map.get(parentNode), mListData_ThirdLevel_Map));
secondLevelExpListView.setGroupIndicator(null);
return secondLevelExpListView;
}
#Override
public int getChildrenCount(int groupPosition) {
return 1;
}
#Override
public Object getGroup(int groupPosition) {
return this.mListDataHeader.get(groupPosition);
}
#Override
public int getGroupCount() {
return this.mListDataHeader.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 layoutInflater = (LayoutInflater) this.mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = layoutInflater.inflate(R.layout.drawer_list_group, parent, false);
}
TextView lblListHeader = (TextView) convertView
.findViewById(R.id.lblListHeader);
lblListHeader.setTypeface(null, Typeface.BOLD);
lblListHeader.setTextColor(Color.CYAN);
lblListHeader.setText(headerTitle);
return convertView;
}
#Override
public boolean hasStableIds() {
return true;
}
#Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
} }
SecondLevelAdapter.java:
public class SecondLevelAdapter extends BaseExpandableListAdapter
{
private final Context mContext;
private final List<String> mListDataHeader;
private final Map<String, List<String>> mListDataChild;
public SecondLevelAdapter(Context mContext, List<String> mListDataHeader, Map<String, List<String>> mListDataChild) {
this.mContext = mContext;
this.mListDataHeader = mListDataHeader;
this.mListDataChild = mListDataChild;
}
#Override
public Object getChild(int groupPosition, int childPosition)
{
return this.mListDataChild.get(this.mListDataHeader.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)
{
final String childText = (String) getChild(groupPosition, childPosition);
if (convertView == null) {
LayoutInflater layoutInflater = (LayoutInflater) this.mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = layoutInflater.inflate(R.layout.drawer_list_item, parent, false);
}
TextView txtListChild = (TextView) convertView
.findViewById(R.id.lblListItem);
txtListChild.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 15);
txtListChild.setText(childText);
return convertView;
}
#Override
public int getChildrenCount(int groupPosition)
{
try {
return this.mListDataChild.get(this.mListDataHeader.get(groupPosition)).size();
} catch (Exception e) {
return 0;
}
}
#Override
public Object getGroup(int groupPosition)
{
return this.mListDataHeader.get(groupPosition);
}
#Override
public int getGroupCount()
{
return this.mListDataHeader.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 layoutInflater = (LayoutInflater) this.mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = layoutInflater.inflate(R.layout.drawer_list_group_second, parent, false);
}
TextView lblListHeader = (TextView) convertView
.findViewById(R.id.lblListHeader);
lblListHeader.setText(headerTitle);
lblListHeader.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 18);
lblListHeader.setTextColor(Color.YELLOW);
return convertView;
}
#Override
public boolean hasStableIds() {
return true;
}
#Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
MainActivity.java:
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.content_main);
// Init top level data
List<String> listDataHeader = new ArrayList<>();
String[] mItemHeaders = getResources().getStringArray(R.array.items_array_expandable_level_one);
Collections.addAll(listDataHeader, mItemHeaders);
ExpandableListView mExpandableListView = (ExpandableListView) findViewById(R.id.expandableListView_Parent);
if (mExpandableListView != null) {
ParentLevelAdapter parentLevelAdapter = new ParentLevelAdapter(this, listDataHeader);
mExpandableListView.setAdapter(parentLevelAdapter);
}
}
}
Screenshot result:

activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ExpandableListView
android:layout_width="fill_parent"
android:id="#+id/ParentLevel"
android:groupIndicator="#null"
android:layout_height="fill_parent">
</ExpandableListView>
</LinearLayout>
MainActivity.Java
import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.LinearLayout.LayoutParams;
public class Home extends Activity
{
ExpandableListView explvlist;
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
explvlist = (ExpandableListView)findViewById(R.id.ParentLevel);
explvlist.setAdapter(new ParentLevel());
}
public class ParentLevel extends BaseExpandableListAdapter
{
#Override
public Object getChild(int arg0, int arg1)
{
return arg1;
}
#Override
public long getChildId(int groupPosition, int childPosition)
{
return childPosition;
}
#Override
public View getChildView(int groupPosition, int childPosition,boolean isLastChild, View convertView, ViewGroup parent)
{
CustExpListview SecondLevelexplv = new CustExpListview(Home.this);
SecondLevelexplv.setAdapter(new SecondLevelAdapter());
SecondLevelexplv.setGroupIndicator(null);
return SecondLevelexplv;
}
#Override
public int getChildrenCount(int groupPosition)
{
return 3;
}
#Override
public Object getGroup(int groupPosition)
{
return groupPosition;
}
#Override
public int getGroupCount()
{
return 5;
}
#Override
public long getGroupId(int groupPosition)
{
return groupPosition;
}
#Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent)
{
TextView tv = new TextView(Home.this);
tv.setText("->FirstLevel");
tv.setBackgroundColor(Color.BLUE);
tv.setPadding(10, 7, 7, 7);
return tv;
}
#Override
public boolean hasStableIds()
{
return true;
}
#Override
public boolean isChildSelectable(int groupPosition, int childPosition)
{
return true;
}
}
public class CustExpListview extends ExpandableListView
{
int intGroupPosition, intChildPosition, intGroupid;
public CustExpListview(Context context)
{
super(context);
}
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
widthMeasureSpec = MeasureSpec.makeMeasureSpec(960, MeasureSpec.AT_MOST);
heightMeasureSpec = MeasureSpec.makeMeasureSpec(600, MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}
public class SecondLevelAdapter extends BaseExpandableListAdapter
{
#Override
public Object getChild(int groupPosition, int childPosition)
{
return 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)
{
TextView tv = new TextView(Home.this);
tv.setText("child");
tv.setPadding(15, 5, 5, 5);
tv.setBackgroundColor(Color.YELLOW);
tv.setLayoutParams(new ListView.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
return tv;
}
#Override
public int getChildrenCount(int groupPosition)
{
return 5;
}
#Override
public Object getGroup(int groupPosition)
{
return groupPosition;
}
#Override
public int getGroupCount()
{
return 1;
}
#Override
public long getGroupId(int groupPosition)
{
return groupPosition;
}
#Override
public View getGroupView(int groupPosition, boolean isExpanded,View convertView, ViewGroup parent)
{
TextView tv = new TextView(Home.this);
tv.setText("-->Second Level");
tv.setPadding(12, 7, 7, 7);
tv.setBackgroundColor(Color.RED);
return tv;
}
#Override
public boolean hasStableIds()
{
// TODO Auto-generated method stub
return true;
}
#Override
public boolean isChildSelectable(int groupPosition, int childPosition)
{
// TODO Auto-generated method stub
return true;
}
}
}

In this case you should create your own Expandable class.
Refer this link.
http://androidcodesnips.blogspot.in/2011/09/three-level-expandable-list.html

Create one more expandable list adapter extending BaseExpandableListAdapter, and in your ExpandableListAdapter getChildView(), call the new expandable list adapter.
I have implemented the same using following link:
https://github.com/talhahasanzia/Three-Level-Expandable-Listview

How to add different children to different parents in ExpandableList in android

I want to add different children into different child in ExpandableList.
My MainActivity.java:-
public class MainActivity extends AppCompatActivity {
//private static String TAG = MainActivity.class.getSimpleName();
private Toolbar mToolbar;
ExpandableListAdapter listAdapter;
ExpandableListView expListView;
List<String> listDataHeader;
int arraylistvalue = 0;
ArrayList<String> arraylist1,arraylist2,arraylist3,arrayList4,arrayList5;
int cnt = 0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mToolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(mToolbar);
getSupportActionBar().setDisplayShowHomeEnabled(true);
arraylist1 = new ArrayList<String>();
arraylist2 = new ArrayList<String>();
arraylist3 = new ArrayList<String>();
arrayList4 = new ArrayList<String>();
arrayList5 = new ArrayList<String>();
new ProductsAsynTask().execute("http://opencart.codeniques.com/shopping/?route=feed/web_api/menu&key=test123$");
}
public class ProductsAsynTask extends AsyncTask<String,Void,Void>{
ProgressDialog dialog;
protected void onPreExecute(){
super.onPreExecute();
Log.d("In onPreExceute","");
dialog = new ProgressDialog(MainActivity.this);
dialog.setMessage("Loading, Please wait");
dialog.setTitle("Connecting server");
dialog.show();
dialog.setCancelable(false);
}
protected Void doInBackground(String... param){
try{
Log.d("In doInBackground","");
HttpClient client= new DefaultHttpClient();
HttpPost post = new HttpPost(param[0]);
HttpResponse response = client.execute(post);
int status = response.getStatusLine().getStatusCode();
if(status == 200){
Log.d("Status",""+status);
HttpEntity entity = response.getEntity();
String data = EntityUtils.toString(entity);
JSONObject jsonObject = new JSONObject(data);
JSONArray jArray = jsonObject.getJSONArray("categories");
for(int i = 0;i < jArray.length();i++){
cnt++;
Log.d("value of array",jArray.length()+"");
Log.d("Value of i",""+i);
JSONObject jsonObject1 = jArray.getJSONObject(i);
arraylist1.add(jsonObject1.getString("name"));
//data1 = jsonObject1.getString("name");
// Log.d("hello ",data1);
JSONArray jsonArray = jsonObject1.getJSONArray("children");
// JSONObject jsonObject2 = jsonObject1.getJSONObject("children");
for(int j=0;j<jsonArray.length();j++){
JSONObject jsonObject2 = jsonArray.getJSONObject(j);
arraylist2.add(jsonObject2.getString("name"));
// data2 = jsonObject2.getString("name");
JSONArray jsonArray1 = jsonObject2.getJSONArray("children_lv3");
for(int k=0;k<jsonArray1.length();k++){
JSONObject jsonObject3 = jsonArray1.getJSONObject(k);
arraylist3.add(jsonObject3.getString("name"));
arrayList4.add(jsonObject3.getString("href"));
/* data3 = jsonObject3.getString("name");
data4 = jsonObject3.getString("href"); */
}
arrayList5.add(jsonObject2.getString("href"));
// data5 = jsonObject2.getString("href");
}
}
}
}catch(IOException e){
Log.e("Error IOException :",e.getMessage());
}catch (JSONException e){
Log.e("Error JSONException",e.getMessage());
}
return null;
}
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
dialog.dismiss();
expListView = (ExpandableListView) findViewById(R.id.lvExp);
expListView.setAdapter(new ParentLevel());
Log.d("Counter value",""+cnt);
}
}
public class ParentLevel extends BaseExpandableListAdapter
{
#Override
public Object getChild(int arg0, int arg1)
{
return arg1;
}
#Override
public long getChildId(int groupPosition, int childPosition)
{
return childPosition;
}
#Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent)
{
CustExpListview SecondLevelexplv = new CustExpListview(MainActivity.this);
SecondLevelexplv.setAdapter(new SecondLevelAdapter());
SecondLevelexplv.setGroupIndicator(null);
return SecondLevelexplv;
}
#Override
public int getChildrenCount(int groupPosition)
{
return 3;
}
#Override
public Object getGroup(int groupPosition)
{
return groupPosition;
}
#Override
public int getGroupCount()
{
int columr = arraylist1.size();
return columr;
}
#Override
public long getGroupId(int groupPosition)
{
return groupPosition;
}
#Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent)
{
TextView tv = new TextView(MainActivity.this);
tv.setText("");
tv.setBackgroundColor(Color.BLUE);
tv.setPadding(10, 7, 7, 7);
return tv;
}
#Override
public boolean hasStableIds()
{
return true;
}
#Override
public boolean isChildSelectable(int groupPosition, int childPosition)
{
return true;
}
}
public class CustExpListview extends ExpandableListView
{
int intGroupPosition, intChildPosition, intGroupid;
public CustExpListview(Context context)
{
super(context);
}
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
widthMeasureSpec = MeasureSpec.makeMeasureSpec(960, MeasureSpec.AT_MOST);
heightMeasureSpec = MeasureSpec.makeMeasureSpec(600, MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}
public class SecondLevelAdapter extends BaseExpandableListAdapter
{
#Override
public Object getChild(int groupPosition, int childPosition)
{
return 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)
{
TextView tv = new TextView(MainActivity.this);
tv.setText("child");
tv.setPadding(15, 5, 5, 5);
tv.setBackgroundColor(Color.YELLOW);
tv.setLayoutParams(new ListView.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
return tv;
}
#Override
public int getChildrenCount(int groupPosition)
{
return 5;
}
#Override
public Object getGroup(int groupPosition)
{
return groupPosition;
}
#Override
public int getGroupCount()
{
return 1;
}
#Override
public long getGroupId(int groupPosition)
{
return groupPosition;
}
#Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent)
{
TextView tv = new TextView(MainActivity.this);
tv.setText("-->Second Level");
tv.setPadding(12, 7, 7, 7);
tv.setBackgroundColor(Color.RED);
return tv;
}
#Override
public boolean hasStableIds() {
// TODO Auto-generated method stub
return true;
}
#Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return true;
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
if(id == R.id.action_search){
Toast.makeText(getApplicationContext(), "Search action is selected!", Toast.LENGTH_SHORT).show();
return true;
}
return super.onOptionsItemSelected(item);
}
}
My activity.xml is here:-
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/drawer_layout"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:id="#+id/container_toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<include
android:id="#+id/toolbar"
layout="#layout/toolbar" />
</LinearLayout>
<FrameLayout
android:id="#+id/container_body"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1" />
</LinearLayout>
<ExpandableListView
android:id="#+id/lvExp"
android:layout_height="match_parent"
android:layout_width="260dp"
android:layout_gravity="start"/>
<!-- <fragment
android:id="#+id/fragment_navigation_drawer"
android:name="com.android.ShoppingMazza.activity.ExpandableListAdapter"
android:layout_width="#dimen/nav_drawer_width"
android:layout_height="match_parent"
android:layout_gravity="start"
app:layout="#layout/fragment_navigation_drawer"
tools:layout="#layout/fragment_navigation_drawer" /> -->
</android.support.v4.widget.DrawerLayout>
I also want drawer below in toolbar.I am new in android developing Please help me Thanks in advance

activitymain.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ExpandableListView
android:layout_width="fill_parent"
android:id="#+id/ParentLevel"
android:groupIndicator="#null"
android:layout_height="fill_parent">
</ExpandableListView>
MainActivity.java
import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.LinearLayout.LayoutParams;
public class Home extends Activity
{
ExpandableListView explvlist;
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
explvlist = (ExpandableListView)findViewById(R.id.ParentLevel);
explvlist.setAdapter(new ParentLevel());
}
public class ParentLevel extends BaseExpandableListAdapter
{
#Override
public Object getChild(int arg0, int arg1)
{
return arg1;
}
#Override
public long getChildId(int groupPosition, int childPosition)
{
return childPosition;
}
#Override
public View getChildView(int groupPosition, int childPosition,boolean isLastChild, View convertView, ViewGroup parent)
{
CustExpListview SecondLevelexplv = new CustExpListview(Home.this);
SecondLevelexplv.setAdapter(new SecondLevelAdapter());
SecondLevelexplv.setGroupIndicator(null);
return SecondLevelexplv;
}
#Override
public int getChildrenCount(int groupPosition)
{
return 3;
}
#Override
public Object getGroup(int groupPosition)
{
return groupPosition;
}
#Override
public int getGroupCount()
{
return 5;
}
#Override
public long getGroupId(int groupPosition)
{
return groupPosition;
}
#Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent)
{
TextView tv = new TextView(Home.this);
tv.setText("->FirstLevel");
tv.setBackgroundColor(Color.BLUE);
tv.setPadding(10, 7, 7, 7);
return tv;
}
#Override
public boolean hasStableIds()
{
return true;
}
#Override
public boolean isChildSelectable(int groupPosition, int childPosition)
{
return true;
}
}
public class CustExpListview extends ExpandableListView
{
int intGroupPosition, intChildPosition, intGroupid;
public CustExpListview(Context context)
{
super(context);
}
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
widthMeasureSpec = MeasureSpec.makeMeasureSpec(960, MeasureSpec.AT_MOST);
heightMeasureSpec = MeasureSpec.makeMeasureSpec(600, MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}
public class SecondLevelAdapter extends BaseExpandableListAdapter
{
#Override
public Object getChild(int groupPosition, int childPosition)
{
return 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)
{
TextView tv = new TextView(Home.this);
tv.setText("child");
tv.setPadding(15, 5, 5, 5);
tv.setBackgroundColor(Color.YELLOW);
tv.setLayoutParams(new ListView.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
return tv;
}
#Override
public int getChildrenCount(int groupPosition)
{
return 5;
}
#Override
public Object getGroup(int groupPosition)
{
return groupPosition;
}
#Override
public int getGroupCount()
{
return 1;
}
#Override
public long getGroupId(int groupPosition)
{
return groupPosition;
}
#Override
public View getGroupView(int groupPosition, boolean isExpanded,View convertView, ViewGroup parent)
{
TextView tv = new TextView(Home.this);
tv.setText("-->Second Level");
tv.setPadding(12, 7, 7, 7);
tv.setBackgroundColor(Color.RED);
return tv;
}
#Override
public boolean hasStableIds()
{
// TODO Auto-generated method stub
return true;
}
#Override
public boolean isChildSelectable(int groupPosition, int childPosition)
{
// TODO Auto-generated method stub
return true;
}
}
}