java - How to get children elements dynamically within expandablelistview by clicking parent node in android -

java - How to get children elements dynamically within expandablelistview by clicking parent node in android -

i new android explain how create childlist dynamic clicking parent?

my problem: have static parent in expandablelistview. intention is, when select parent see child, kid come dynamically form info base of operations , navigable (i want see more detail or go different page.)

i done static kid in 3 steps.

create xml file expandablelistview. on main java phone call adapter bind adapter expandablelistview. create custom adapter.

the adapter following:

package com.example.eschool_only_accrdion_straggle; import android.r.color; import android.content.context; import android.graphics.color; import android.view.view; import android.view.viewgroup; import android.widget.baseexpandablelistadapter; import android.widget.textview; public class my_custom_adapter extends baseexpandablelistadapter { private context context; string [] parentlist={"summer fruit", "winter fruit", "hard fruit", "watery fruit"}; // string [][] childlist={{"lychy", "mango"},{"banana"},{"pomy granade"},{"pani fruit"}}; public my_custom_adapter(context context) { this.context = context; } // in here 1st parameter parent , 2nd 1 kid @override public object getchild(int groupposition, int childposition) { // todo auto-generated method stub homecoming null; } @override public long getchildid(int groupposition, int childposition) { // todo auto-generated method stub homecoming 0; } @override public view getchildview(int groupposition, int childposition, boolean arg2, view arg3, viewgroup arg4) { textview txtv_child=new textview(context); txtv_child.settext(childlist[groupposition][childposition]); txtv_child.setpadding(35, 0, 0, 0); txtv_child.settextcolor(color.cyan); txtv_child.settextsize(17); homecoming txtv_child; } @override public int getchildrencount(int groupposition) { homecoming childlist[groupposition].length; } @override public object getgroup(int groupposition) { homecoming groupposition; } @override public int getgroupcount() { // todo auto-generated method stub homecoming parentlist.length; } @override public long getgroupid(int groupposition) { // todo auto-generated method stub homecoming groupposition; } @override public view getgroupview(int groupposition, boolean childposition, view arg2, viewgroup arg3) { textview txtv_parent=new textview(context); txtv_parent.settext(parentlist[groupposition]); txtv_parent.setpadding(5, 5, 0, 5); txtv_parent.settextcolor(color.magenta); txtv_parent.settextsize(25); homecoming txtv_parent; } @override public boolean hasstableids() { // todo auto-generated method stub homecoming false; } @override public boolean ischildselectable(int groupposition, int childposition) { // todo auto-generated method stub homecoming true; } }

create activity extending "expandablelistactivity", follow illustration tutorial

initialize data

private arraylist<string> groups = new arraylist<string>() ; private arraylist<arraylist<string>> children; private newadapter mnewadapter = null; public void oncreate(bundle savedinstancestate) { // .... groups.add("summer fruit"); groups.add("winter fruit"); groups.add("hard fruit"); groups.add("watery fruit"); children = new arraylist<arraylist<string>>(); arraylist<string> = new arraylist<string>(); a.add("lychy"); a.add("mango"); children.add(a); = new arraylist<string>(); a.add("banana"); children.add(a); = new arraylist<string>(); a.add("pomy granade"); children.add(a); = new arraylist<string>(); a.add("pani fruit"); children.add(a); mnewadapter = new newadapter(groups, children); mnewadapter.setinflater((layoutinflater) getsystemservice(context.layout_inflater_service),this); getexpandablelistview().setadapter(mnewadapter); int cpt = mnewadapter.getgroupcount(); for(int = 0; < cpt; i++ ){ getexpandablelistview().expandgroup(i); } }

then sure overwrite next method activity

@override public boolean onchildclick(expandablelistview parent, view v, int groupposition, int childposition, long id) { // here need when kid selected homecoming true; }

add add together adapter

class newadapter extends baseexpandablelistadapter{ public layoutinflater minflater; public activity activity; public arraylist<string> groups; public arraylist<arraylist<string>> points; public newadapter(arraylist<string> groups, arraylist<arraylist<string>> points){ this.groups = groups; this.points = points; } public void setinflater(layoutinflater minflater, activity act) { this.minflater = minflater; activity = act; } @override public void notifydatasetchanged() { super.notifydatasetchanged(); } @override public object getchild(int groupposition, int childposition) { homecoming null; } @override public long getchildid(int groupposition, int childposition) { homecoming 0; } @override public int getchildrencount(int groupposition) { homecoming ((arraylist<string>) points.get(groupposition)).size(); } @override public object getgroup(int groupposition) { homecoming groups.get(groupposition); } @override public int getgroupcount() { homecoming groups.size(); } @override public void ongroupcollapsed(int groupposition) { super.ongroupcollapsed(groupposition); } @override public long getgroupid(int groupposition) { homecoming 0; } @override public view getgroupview(int groupposition, boolean childposition, view arg2, viewgroup arg3) { // ... homecoming v; } @override public boolean hasstableids() { homecoming false; } @override public boolean ischildselectable(int groupposition, int childposition) { homecoming true; } @override public view getchildview(int groupposition, final int childposition, boolean islastchild, view v, viewgroup parent) { // .... homecoming v; } }

within adapter sure have ischildselectable(int groupposition, int childposition) returning "true".

java android expandablelistview