java - How to add different image for each group in expandable Listview -

in expandable listview, have 3 groups. want add different 3 image group. tried many codes, not working.

my code:

main activity:

hashmap<string, list<string>> rightdrawerlistdetail = getdata(); list<string> rightdrawerlisttitle = new arraylist<string>(rightdrawerlistdetail.keyset());    adapterr = new customexpandablelistadapter(this, rightdrawerlisttitle,rightdrawerlistdetail);     mrightdrawerlist.setadapter(adapterr);   private hashmap<string, list<string>> getdata(){      hashmap<string, list<string>> expandablelistdetail = new hashmap<string, list<string>>();     arraylist<string> arraylist = mydb.getalladdress();      list asrider = new arraylist();     asrider.add("hello");      list asridee = new arraylist();     asridee.add("hai");      list recent = new arraylist();     recent.add("success");      expandablelistdetail.put("as rider",asrider);     expandablelistdetail.put("as ridee",asridee);     expandablelistdetail.put("my recent activities",recent);       return expandablelistdetail; } 

customexpandablelistadapter.java:

public class customexpandablelistadapter extends baseexpandablelistadapter {  private context mcontext; private list<string> mgroups; private layoutinflater minflater; private hashmap<string, list<string>> mexpandablelistdetail;  public customexpandablelistadapter(context context, list<string> groups,hashmap<string, list<string>> expandablelistdetail) {     mcontext = context;     mgroups = groups;     mexpandablelistdetail = expandablelistdetail;     minflater = (layoutinflater) context.getsystemservice(context.layout_inflater_service); }  @override public int getgroupcount() {     return mgroups.size(); }  @override public int getchildrencount(int groupposition) {     return mexpandablelistdetail.get(mgroups.get(groupposition)).size(); }  @override public object getgroup(int groupposition) {     return mgroups.get(groupposition); }  @override public object getchild(int groupposition, int childposition) {     return mexpandablelistdetail.get(mgroups.get(groupposition)).get(childposition); }  @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 view getgroupview(int groupposition, boolean isexpanded, view convertview, viewgroup parent) {      if (convertview == null) {         convertview = minflater.inflate(r.layout.right_drawer_group, null);     }      // group item     string listtitle = (string) getgroup(groupposition);     // set group name     textview textview = (textview) convertview.findviewbyid(r.id.textgroup);     textview.settext(listtitle);     imageview indicator = (imageview) convertview.findviewbyid(r.id.groupindicator);     if (isexpanded) {         indicator.setimageresource(r.drawable.arrowup);     } else {         indicator.setimageresource(r.drawable.arrowdown);     }      return convertview; }  @override public view getchildview(int groupposition, int childposition, boolean islastchild, view convertview, viewgroup parent) {       if (convertview == null) {         convertview = minflater.inflate(r.layout.right_drawer_child, null);     }      // child name     string children = (string) getchild(groupposition, childposition);      // set child name     textview text = (textview) convertview.findviewbyid(r.id.textchild);     text.settext(children);      /*convertview.setonclicklistener(new view.onclicklistener() {         @override         public void onclick(view v) {             toast.maketext(mcontext, children, toast.length_short).show();         }     });*/      return convertview; }  @override public boolean ischildselectable(int groupposition, int childposition) {     return true; } 

}

please me!

thanks in advance

in right_drawer_group.xml add imageview want group image placed, lets groupimage.

in getgroupview:

@override public view getgroupview(int groupposition, boolean isexpanded, view convertview, viewgroup parent) {  if (convertview == null) {     convertview = minflater.inflate(r.layout.right_drawer_group, null); } //set group image imageview groupimage = (imageview)convertview.findviewbyid(r.id.groupimage); switch((string)getgroup(groupposition)) {  case "as rider":   //groupimage set correct image   break;  case "as ridee":   //groupimage set correct image   break;  case "my recent activities":   //groupimage set correct image   break; }  // group item string listtitle = (string) getgroup(groupposition); // set group name     textview textview = (textview) convertview.findviewbyid(r.id.textgroup); textview.settext(listtitle); imageview indicator = (imageview) convertview.findviewbyid(r.id.groupindicator); if (isexpanded) {     indicator.setimageresource(r.drawable.arrowup); } else {     indicator.setimageresource(r.drawable.arrowdown); }  return convertview; } 

it's not neat solution if change group name break, work now. better solution pass groups objects containing getname , getimageid.