java - Why badge doesn't appear? -

i try make smth this:

to obtain result use code:

i have navigationview

<android.support.design.widget.navigationview     android:id="@+id/nav_view"     android:layout_width="wrap_content"     android:layout_height="match_parent"     android:layout_gravity="start"     android:fitssystemwindows="true"     app:headerlayout="@layout/nav_header_main_second"     app:menu="@menu/activity_third_drawer" /> 

i have menu xml file:

<?xml version="1.0" encoding="utf-8"?> 

<group android:checkablebehavior="single">      <item         android:id="@+id/nav_inbox"         android:icon="@drawable/ic_mail_outline_white"         android:title="inbox"         app:actionlayout="@layout/badge" /> </group>  <item android:title="@string/about_app">     <menu>         <item             android:id="@+id/nav_about"             android:icon="@drawable/ic_close_24dp"             android:title="@string/about1" />     </menu> </item> </menu> 

and have badge xml file:

<?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">  <textview     android:id="@+id/textmenuitemcount"     android:layout_width="wrap_content"     android:text="rrrr"     android:layout_height="wrap_content"     android:layout_alignparentend="true"     android:textcolor="@android:color/holo_blue_light"     android:textstyle="bold"     android:textsize="16sp"     android:alpha="0.6"/> </relativelayout> 

then try set 2 badge in mainactivity:

@override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_mainsecond);      navigationview navigationview = (navigationview) findviewbyid(r.id.nav_view);     menuitem item = navigationview.getmenu().finditem(r.id.nav_inbox);     menuitemcompat.setactionview(item, r.layout.badge);     relativelayout notifcount = (relativelayout) menuitemcompat.getactionview(item);     textview tv = (textview) notifcount.findviewbyid(r.id.textmenuitemcount);     tv.settext("2"); } 

and nothing.

i have tried debug , show me ok.

please me. doing wrong?

easiest option provide fragment custom layout second child drawerlayout instead of navigationview. , work navigationview instead can give lot more customizations.

follow slidenerd tutorial approach. watch videos total understanding :) :

https://www.youtube.com/watch?v=zwpeh9k8i7q

if still want stick using navigationview, check out duplicate question have asked. gives approach.

how create custom navigation drawer in android