android - Multi expandable recyclerview -

i try implements own multi expandable recyclerview it'w work fine 1 sub-item when want sub-sub-item view display need click on several times. example of hierarchy :

title1   subtitle1   subtitle2   subtitle3     subsubtitle1     subsubtitle2 title2 ... 

edit : problem on subtitle display subsub'sitem. think need notify parent adapter view changed doesn't work to.

to used recyclerview itemlayout contain recyclerview , when click on item set adapter off child recyclerview. use custom linearlayoutmanager found here https://stackoverflow.com/a/29261667/3289338.

my onbindviewholder :

@override public void onbindviewholder(final drawerviewholder holder, final int position) {     if (holder.type == type_expandable_item) {         final itemdrawer item;         if (header) {             item = itemdrawers.get(position - 1);         } else {             item = itemdrawers.get(position);         }         holder.textview.settext(item.gettitle());          holder.itemview.setonclicklistener(new view.onclicklistener() {             @override             public void onclick(view v) {                 if (item.isopen()) {                     item.setopen(false);                     holder.recyclerview_child.setvisibility(view.gone);                     notifyitemchanged(position);                 } else {                     item.setopen(true);                     holder.recyclerview_child.setvisibility(view.visible);                     holder.recyclerview_child.setadapter(new draweradapter(item.getsubitem(), drawer, fragmentmanager, false));                     holder.recyclerview_child.setlayoutmanager(new mylinearlayoutmanager(holder.itemview.getcontext().getapplicationcontext()));                     notifyitemchanged(position);                  }             }         });      } else if (holder.type == type_simple_item) {         final itemdrawer item;         if (header) {             item = itemdrawers.get(position - 1);         } else {             item = itemdrawers.get(position);         }          holder.itemview.setonclicklistener(new view.onclicklistener() {             @override             public void onclick(view v) {                 if (item.isactivity()) {                     holder.itemview.getcontext().startactivity(item.getactivityintent());                 } else {                     fragmentmanager.begintransaction().replace(r.id.drawer_frame_layout, item.getfragment()).commit();                 }             }         });     } else {         //header     } } 

and layout :

<?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:orientation="vertical">      <relativelayout         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:background="?attr/selectableitembackground"         android:paddingbottom="8dp"         android:paddingtop="8dp">          <imageview             android:id="@+id/imageview_drawer_row_expandable"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:paddingstart="16dp"             android:src="@drawable/ic_drawer" />          <textview             android:id="@+id/textview_drawer_row_expandable"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_toendof="@id/imageview_drawer_row_expandable"             android:paddingstart="12dp"             android:paddingtop="4dp"             android:textappearance="?android:attr/textappearancemedium" />          <imagebutton             android:id="@+id/imageview_drawer_row_expandable_open"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_alignparentend="true"             android:layout_centervertical="true"             android:background="#00000000"             android:paddingend="16dp"             android:src="@android:drawable/arrow_up_float" />     </relativelayout>       <android.support.v7.widget.recyclerview         android:id="@+id/recyclerview_drawer_child"         android:layout_width="@dimen/navigation_drawer_width"         android:layout_height="match_parent"         android:background="#ffffff"         android:paddingstart="16dp"         android:scrollbars="vertical"         android:visibility="gone" /> </linearlayout> 

thanx.

https://github.com/itsnothingg/recursiverecyclerview

i made open source this. can implement multi-expanding recyclerview , use different layout each expanding depth.