android - ExpandableListView - A checkbox as indicator for expanded or not -

this have, expandable listview. each group item checkbox witha textview next it.

i want checkbox toggled checked/unchecked if group expanded or not expanded.

also vica versa, if checkbox checked, list should expanded etc.

any ideas?

this group_layout.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="match_parent"     android:orientation="horizontal">      <checkbox         android:id="@+id/check_channel"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_margin="10dp"         android:focusable="false"         android:layout_gravity="left"         android:checked="false" />      <textview         android:textsize="20sp"         android:textisselectable="false"         android:id="@+id/textview"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_margintop="20dp"         android:layout_marginleft="55dp"/>  </relativelayout> 

it looks pretty, need check , uncheck .

ah ok, how did it

public view getgroupview(int groupposition, boolean isexpanded, view convertview,viewgroup parent) {      view v;     if (convertview == null) {         v = newgroupview(isexpanded, parent);     } else {         v = convertview;     }      if ( isexpanded ) {         ((checkbox) v.findviewbyid(r.id.check_channel)).setchecked(true);     } else {         ((checkbox) v.findviewbyid(r.id.check_channel)).setchecked(false);     }     bindgroupview(groupposition, isexpanded, v, parent);     return v; }