android - Change value of TextView on Item Click inside a RecyclerView? -

i developing app restaurant management, stuck @ point need update value of textview(outside of recyclerview) on item click inside recyclerview.

this adapter, consider textview outside adapter , set value on item click of plus , minus imageviews shown in below code...

public class myrecycleradapter extends recyclerview.adapter<myrecycleradapter.myholder> {  arraylist<menuitem> menudetaillist; typeface font;  public myrecycleradapter(arraylist<menuitem> menudetailarray){     this.menudetaillist = menudetailarray; }  @override public myrecycleradapter.myholder oncreateviewholder(viewgroup parent, int viewtype) {      view v = layoutinflater.from(parent.getcontext()).inflate(r.layout.list_menu_row_item, null);     return new myholder(v); }  @override public void onbindviewholder(final myrecycleradapter.myholder holder, final int position) {      holder.txtsubmenutitle.settext(menudetaillist.get(position).gettitle());     holder.txtsubmenuprice.settext(menudetaillist.get(position).getprice());     holder.txtsubmenucount.settext(""+menudetaillist.get(position).getitemcount());     setcustomtypeface(holder.txtsubmenutitle, font);     setcustomtypeface(holder.txtsubmenuprice,font);      holder.imgviewsubmenuminus.setonclicklistener(new view.onclicklistener() {         @override         public void onclick(view v) {             //holder.ordercount = integer.parseint(holder.txtsubmenucount.gettext().tostring());             int itemcount = menudetaillist.get(position).getitemcount();             if (itemcount > 0) {                 itemcount = itemcount - 1;                 holder.txtsubmenucount.settext("" + itemcount);                 menudetaillist.get(position).setitemcount(itemcount);                 notifydatasetchanged();             }         }     });      holder.imgviewsubmenuplus.setonclicklistener(new view.onclicklistener() {         @override         public void onclick(view v) {             //holder.ordercount = integer.parseint(holder.txtsubmenucount.gettext().tostring());              int itemcount = menudetaillist.get(position).getitemcount();             if (itemcount < 20) {                 itemcount = itemcount + 1;                 holder.txtsubmenucount.settext("" + itemcount);                 menudetaillist.get(position).setitemcount(itemcount);                 notifydatasetchanged();             }     }); }  @override public int getitemcount() {     return menudetaillist.size(); }  public static class myholder extends recyclerview.viewholder {     textview txtsubmenutitle;     textview txtsubmenuprice;     imageview imgviewsubmenuminus;     imageview imgviewsubmenuplus;     textview txtsubmenucount;      private myholder(view row) {         super(row);         this.txtsubmenutitle = (textview) row.findviewbyid(r.id.list_txt_sub_menu_title);         this.txtsubmenuprice = (textview) row.findviewbyid(r.id.list_txt_sub_menu_price);         this.txtsubmenucount = (textview) row.findviewbyid(r.id.list_txt_sub_menu_count);         this.imgviewsubmenuminus = (imageview) row.findviewbyid(r.id.list_img_sub_menu_minus);         this.imgviewsubmenuplus = (imageview) row.findviewbyid(r.id.list_img_sub_menu_plus);     } } private void setcustomtypeface(textview textview, typeface font) {     textview.settypeface(font); } } 

thanks in advance...

1.in activity initialize textview

textview mytextview = (textview) findviewbyitd(r.id.textview); 

2.add parameter textview in adapter's constructor

3.pass textview adapter

myrecycleradapter adapter = new myrecycleradapter(menu, mytextview);

4.manipulate want

arraylist<menuitem> menudetaillist; typeface font; textview mtextview;  public myrecycleradapter(arraylist<menuitem> menudetailarray, textview tv){      this.menudetaillist = menudetailarray;      mtextview = tv; } 

mtextview.settext("eat more pizza");