new StreamBuilder<QuerySnapshot>( stream: Firestore.instance.collection('categories').snapshots(), builder: (context, snapshot){ if (!snapshot.hasData) return const Center( child: const CupertinoActivityIndicator(), ); var length = snapshot.data.documents.length; documentSnapshot ds = snapshot.data.documents[length - 1]; _queryCat = snapshot.data.documents; return new Container( padding: EdgeInsets.only(bottom: 16.0), width: screenSize.width*0.9, child: new Row( children: <Widget>[ new Expanded( flex: 2, child: new Container( padding: EdgeInsets.fromLTRB(12.0,10.0,10.0,10.0), child: new Text("Category",style: textStyleBlueBold,), ) ), new Expanded( flex: 4, child:new InputDecorator( decoration: const InputDecoration( //labelText: 'Activity', hintText: 'Choose an category', hintStyle: TextStyle( color: primaryColor, fontSize: 16.0, fontFamily: "OpenSans", fontWeight: FontWeight.normal, ), ), isEmpty: _category == null, child: new DropdownButton( value: _category, isDense: true, onChanged: (String newValue) { setState(() {_category = newValue;dropDown = false;print(_category); }); }, items: snapshot.data.documents.map((documentSnapshot document) { return new DropdownMenuItem<String>( value: document.data['title'], child: new Container( decoration: new BoxDecoration( color: primaryColor, borderRadius: new BorderRadius.circular(5.0) ), height: 100.0, padding: EdgeInsets.fromLTRB(10.0, 2.0, 10.0, 0.0), //color: primaryColor, child: new Text(document.data['title'],style: textStyle), ) ); }).toList(), ), ), ), ], ), ); });
