activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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="iterator.ir.a042.MainActivity">
<ExpandableListView
android:id="@+id/expandableListViewProvinces"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true" />
</RelativeLayout>
HeaderInfo.java
public class HeaderInfo {
public String getProvoniceName() {
return provoniceName;
}
public void setProvoniceName(String provoniceName) {
this.provoniceName = provoniceName;
}
private String provoniceName;
public int getPopulation() {
return population;
}
private int population;
public ArrayList<DetailInfo> getCities() {
return cities;
}
public void setCities(ArrayList<DetailInfo> cities) {
this.cities = cities;
int pop=0;
for (DetailInfo info:cities)
{
pop+=info.getPopulation();
}
this.population=pop;
}
private ArrayList<DetailInfo> cities=new ArrayList<>();
}
DetailInfo.java
public class DetailInfo {
private String cityName;
public String getCityName() {
return cityName;
}
public void setCityName(String cityName) {
this.cityName = cityName;
}
public int getPopulation() {
return population;
}
public void setPopulation(int population) {
this.population = population;
}
private int population;
}
CustomAdapter.java
public class CustomAdapter extends BaseExpandableListAdapter {
private Context context;
private ArrayList<HeaderInfo> cInfo;
public CustomAdapter(Context context,ArrayList<HeaderInfo> cInfo)
{
this.context=context;
this.cInfo=cInfo;
}
@Override
public int getGroupCount() {
return cInfo.size();
}
@Override
public int getChildrenCount(int groupPosition) {
return cInfo.get(groupPosition).getCities().size();
}
@Override
public Object getGroup(int groupPosition) {
return cInfo.get(groupPosition);
}
@Override
public Object getChild(int groupPosition, int childPosition) {
return cInfo.get(groupPosition).getCities().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 true;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
View view=convertView;
if (view==null)
{
LayoutInflater layoutInflater=LayoutInflater.from(context);
view=layoutInflater.inflate(R.layout.header_layout,parent,false);
}
HeaderInfo current=this.cInfo.get(groupPosition);
if (current!=null)
{
TextView textViewProvinceName= (TextView) view.findViewById(R.id.textViewProvinceName);
TextView textViewProvincePopulation= (TextView) view.findViewById(R.id.textViewProvincePopulation);
textViewProvinceName.setText(current.getProvoniceName());
textViewProvincePopulation.setText(String.valueOf(current.getPopulation()));
}
return view;
}
@Override
public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
View view=convertView;
if (view==null)
{
LayoutInflater layoutInflater=LayoutInflater.from(context);
view=layoutInflater.inflate(R.layout.detail_layout,parent,false);
}
DetailInfo current=this.cInfo.get(groupPosition).getCities().get(childPosition);
if (current!=null)
{
TextView textViewCityName= (TextView) view.findViewById(R.id.textViewCityName);
TextView textViewCityPopulation= (TextView) view.findViewById(R.id.textViewCityPopulation);
textViewCityName.setText(current.getCityName());
textViewCityPopulation.setText(String.valueOf(current.getPopulation()));
}
return view;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
MainActivity.java
public class MainActivity extends AppCompatActivity {
ExpandableListView expandableListViewProvinces;
ArrayList<HeaderInfo> provonices;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
GenerateData();
expandableListViewProvinces= (ExpandableListView) findViewById(R.id.expandableListViewProvinces);
CustomAdapter adapter=new CustomAdapter(this,provonices);
expandableListViewProvinces.setAdapter(adapter);
}
private void GenerateData()
{
provonices=new ArrayList<>();
DetailInfo detailInfo1=new DetailInfo();
detailInfo1.setCityName("Rasht");
detailInfo1.setPopulation(1000000);
DetailInfo detailInfo2=new DetailInfo();
detailInfo2.setCityName("Lahijan");
detailInfo2.setPopulation(700000);
DetailInfo detailInfo3=new DetailInfo();
detailInfo3.setCityName("Anzali");
detailInfo3.setPopulation(800000);
DetailInfo detailInfo4=new DetailInfo();
detailInfo4.setCityName("Fouman");
detailInfo4.setPopulation(200000);
ArrayList<DetailInfo> cities1=new ArrayList<>();
cities1.add(detailInfo1);
cities1.add(detailInfo2);
cities1.add(detailInfo3);
cities1.add(detailInfo4);
HeaderInfo headerInfo1=new HeaderInfo();
headerInfo1.setProvoniceName("Guilan");
headerInfo1.setCities(cities1);
DetailInfo detailInfo5=new DetailInfo();
detailInfo5.setCityName("Tehran");
detailInfo5.setPopulation(10000000);
DetailInfo detailInfo6=new DetailInfo();
detailInfo6.setCityName("Hashtgerd");
detailInfo6.setPopulation(700000);
ArrayList<DetailInfo> cities2=new ArrayList<>();
cities2.add(detailInfo5);
cities2.add(detailInfo6);
HeaderInfo headerInfo2=new HeaderInfo();
headerInfo2.setProvoniceName("Tehran");
headerInfo2.setCities(cities2);
DetailInfo detailInfo7=new DetailInfo();
detailInfo7.setCityName("Qazvin");
detailInfo7.setPopulation(1000000);
ArrayList<DetailInfo> cities3=new ArrayList<>();
cities3.add(detailInfo7);
HeaderInfo headerInfo3=new HeaderInfo();
headerInfo3.setProvoniceName("Qazvin");
headerInfo3.setCities(cities3);
provonices.add(headerInfo1);
provonices.add(headerInfo2);
provonices.add(headerInfo3);
}
}
References
https://github.com/mhdr/AndroidSamples/tree/master/042
