android - How can I expand widget Expandable ListView to 10 layers? -

i'm developing expandable listview 10 layers .

i using following code second layer go forward .

i have used following code:

public void oncreate(bundle savedinstancestate) {     try{          super.oncreate(savedinstancestate);          setcontentview(r.layout.main);      simpleexpandablelistadapter explistadapter =         new simpleexpandablelistadapter(                 this,                 creategrouplist(),              // creating group list.                 r.layout.group_row,             // group item layout xml.                            new string[] { "group item" ,"level"},  // key of group item.                 new int[] { r.id.row_name ,r.id.row_name2}, // id of each group item.-data under key goes textview.                                    createchildlist(),              // childdata describes second-level entries.                 r.layout.child_row,             // layout sub-level entries(second level).                 new string[] {"sub item","level"},      // keys in childdata maps display.                 new int[] { r.id.grp_child,r.id.grp_child2}     // data under keys above go these textviews.             );          setlistadapter( explistadapter );       // setting adapter in list.      }catch(exception e){         system.out.println("errrr +++ " + e.getmessage());     }  }  /* creating hashmap row */ @suppresswarnings("unchecked") private list creategrouplist() {       arraylist result = new arraylist();       for( int = 0 ; < 15 ; ++i ) { // 15 groups........         hashmap m = new hashmap();         m.put( "group item","شماره گروه " + ); // key , it's value.         m.put( "level","لایه اول " );          result.add( m );       }       return (list)result; }  /* creatin hashmap children */ @suppresswarnings("unchecked") private list createchildlist() {      arraylist result = new arraylist();     for( int = 0 ; < 15 ; ++i ) { // -15 number of groups(here it's fifteen)       /* each group need each hashmap-here each group have 3 subgroups */       arraylist seclist = new arraylist();        for( int n = 0 ; n < 3 ; n++ ) {         hashmap child = new hashmap();                   child.put( "sub item", "شماره زیر گروه " + n );         child.put( "level", "لایه دوم ");         seclist.add( child );       }      result.add( seclist );     }             return result; } public void  oncontentchanged  () {     system.out.println("oncontentchanged");     super.oncontentchanged();          } /* function called on each child click */ public boolean onchildclick( expandablelistview parent, view v, int groupposition,int childposition,long id) {     system.out.println("inside onchildclick @ groupposition = " + groupposition +" child clicked @ position " + childposition);     return true; }  /* function called on expansion of group */ public void  ongroupexpand  (int groupposition) {     try{          system.out.println("group exapanding listener => groupposition = " + groupposition);     }catch(exception e){         system.out.println(" groupposition errrr +++ " + e.getmessage());     } }   

please solution comes mind in context give me.

meanwhile

output program following image the: