android - Collapsing Toolbar Title Disappear -


i'm on design support library 23.0.1, , i'm using collapsing toolbar layout parallax image. don't understand why when toolbar totally collapsed (pinned) if click on action button (specifically refresh image), title disappear. after if drop down header total expansion , reclick action button title returns.

activity layout 

<!-- app bar --> <android.support.design.widget.appbarlayout     android:id="@+id/app_bar"     android:layout_width="match_parent"     android:layout_height="150dp"     android:fitssystemwindows="true"     android:theme="@style/themeoverlay.appcompat.dark.actionbar">      <!-- collapsing toolbar layout -->     <android.support.design.widget.collapsingtoolbarlayout         android:id="@+id/collapsing_toolbar"         android:layout_width="match_parent"         android:layout_height="match_parent"         android:fitssystemwindows="true"         app:contentscrim="?attr/colorprimary"         app:expandedtitlemarginbottom="32dp"         app:expandedtitlemarginend="64dp"         app:expandedtitlemarginstart="48dp"         app:layout_scrollflags="scroll|exituntilcollapsed">          <!-- image parallax -->         <imageview             android:id="@+id/header"             android:layout_width="match_parent"             android:layout_height="match_parent"             android:adjustviewbounds="true"             android:contentdescription=""             android:fitssystemwindows="true"             android:scaletype="centercrop"             edo:layout_collapsemode="parallax" />          <!-- toolbar -->         <android.support.v7.widget.toolbar             android:id="@+id/toolbar"             android:layout_width="match_parent"             android:layout_height="?attr/actionbarsize"             app:layout_collapsemode="pin"             edo:popuptheme="@style/themeoverlay.appcompat.light">          </android.support.v7.widget.toolbar>      </android.support.design.widget.collapsingtoolbarlayout> </android.support.design.widget.appbarlayout>  <!-- nested scroll view --> <android.support.v4.widget.nestedscrollview     android:id="@+id/nested_scroll_view"     android:layout_width="match_parent"     android:layout_height="match_parent"     edo:layout_behavior="@string/appbar_scrolling_view_behavior">  </android.support.v4.widget.nestedscrollview>

action menu layout 

<item     android:id="@+id/action_bookmark"     android:icon="@mipmap/bookmark_empty_white"     android:title="@string/add_news_to_bookmarks"     app:showasaction="ifroom" />

options selected

@override public boolean onoptionsitemselected(menuitem item) {     if (news != null) {         switch (item.getitemid()) {             case r.id.action_bookmark:                 if (utils.isnetworkavailable(activity)) {                     if (news.getbookmarked()) {                         bookmarked = false;                         item.seticon(r.mipmap.bookmark_empty_white);                         deletebookmark();                     } else {                         bookmarked = true;                         item.seticon(r.mipmap.bookmark_white);                         postbookmark();                     }                 } else {                     handleerror(config.api_err_connection);                 }                  return true;         }     }      return super.onoptionsitemselected(item); }

this bug @ android's side. aware of , looks fixed in future release: https://code.google.com/p/android/issues/detail?id=183333

workarounds posted in link none have been able fix issue.

edit: issue has been fixed support library v23.1.0


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