floatingActionButton: new FloatingActionButton(
          tooltip: 'New Post',
          onPressed: (){
           showDialog(context: context,
             builder:(BuildContext context){
              return new AlertDialog(
                  title: new Text('New Post'),
                  contentPadding: const EdgeInsets.fromLTRB(1.0,0.0,1.0,0.0),
                  content:new SingleChildScrollView(
                    child:new ListBody(
                      children: <Widget>[
                        ListTile(
                          leading:Icon(Icons.subject),
                          title:TextFormField(
                            initialValue: "",
                            onSaved: (val) => board.subject = val,
                            validator:  (val) => val =="" ? val:null,
                          ),
                        ),
                      ],
                    )
                  )
               );
             }
           );



          },
          child: new Icon(Icons.add),
        )