JD 7 head search navigation layout

appBar: _currentIndex!=3?AppBar(
        leading: IconButton(
          icon: Icon(Icons.center_focus_weak,size: 28,color: Colors.black87),
          onPressed: null,
        ),
        title: InkWell(
          child: Container(
            height: ScreenAdaper.height(68),
            decoration: BoxDecoration(
              color: Color.fromRGBO(233, 233, 233, 0.8),
              borderRadius: BorderRadius.circular(30)
            ),
            padding: EdgeInsets.only(left: 10),
            child: Row(
              crossAxisAlignment: CrossAxisAlignment.center,
              children: <Widget>[
                Icon(Icons.search),
                Text(" The notebook ",style: TextStyle(fontSize: ScreenAdaper.size(28)),)
              ],
            ),
          ),
          onTap: (){
            Navigator.pushNamed(context, "/search");
          },
        ),
        actions: <Widget>[
          IconButton(onPressed: null,