Re: create a dropdown button in flutter

Question

I have used a DropDownButton in my build but i want the arrow to be displayed at the end and the dropdown items to be displayed from arrow, but in my app they are displaying from the top. i have attached the screenshots for your reference.

please can you tell me how to change this or is there any other way to simply create a drop down menu.

An example would be much appreciated.

Please excuse my code as I am new to programming and any comments or suggestions are most welcome.

Many Thanks, Mahi.

import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'dart:ui';

void main(){
    runApp(new BranchSetup());
      }
      
class BranchSetup extends StatefulWidget {
    @override
    State<StatefulWidget> createState() {
         return new _BranchSetupState();
          }
       } 

    class _BranchSetupState extends State<BranchSetup> with 
                                WidgetsBindingObserver {

     @override
           Widget build(BuildContext context){
           return new MaterialApp(
              theme: new ThemeData(
                  primaryColor: const Color(0xFF229E9C),
                                ),
              title: 'Branch Setup',
              home: new Scaffold(
              body: new Container(
              child: new ListView(
                children: <Widget>[
                 new Container(
                   margin: const EdgeInsets.all(16.0),
                    child: new Row(
                     children: <Widget>[
                      new Expanded(
                        child: new TextFormField(
            decoration: new InputDecoration(                          
                       labelText: 'Branch Name',
                   ),
                ),
              ),
            ],
          ),
         ),
          new Container(
            margin: const EdgeInsets.all(16.0),
            child:
              new DropdownButton<String>(
                items: <String>['Mens','Womans']
                      .map((String value) {
                    return new DropdownMenuItem<String>(
                        value: value,
                        child: new Text(value),
                    );
                  }
                  ).toList(),
               onChanged: null,
                ),
            ),

          ],
        ),
        ),
     ),
    );
   }

  }

Collin Jackson · Accepted Answer · 2017-09-12 18:16:52Z

14

This looks like a bug in Flutter. I filed an issue.

In the meantime, you can work around it by wrapping your DropdownButton in a Column.

import 'package:flutter/material.dart';

void main() {
  runApp(new MaterialApp(home: new DemoApp()));
}

class DemoApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(title: new Text('DropdownButton Example')),
      body: new ListView(
        children: [
          new Column(
            children: <Widget>[
              new DropdownButton<String>(
                items: <String>['Foo', 'Bar'].map((String value) {
                  return new DropdownMenuItem<String>(
                    value: value,
                    child: new Text(value),
                  );
                }).toList(),
                onChanged: (_) {},
              ),
            ],
          ),
        ],
      ),
    );
  }
}

answered Sep 12, 2017 at 18:16

Collin Jackson

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4 Comments

Mahi Over a year ago

thank you very much for your help Collin Jackson, I've tried this workaround and it seems to be working for me . Thanks once again.

Suriyan Suresh Over a year ago

This issue has been closed

kosiara - Bartosz Kosarzycki Over a year ago

DropdownButton stays empty after item selection. How can we fill it with the selected text?

Anuran Barman Over a year ago

@kosiara-BartoszKosarzycki because DropdownButton is not maintaining the state. So you have to set the value property to something and in onChanged you have to set the initial value via setState() call.

dranzer · Accepted Answer · 2018-08-30 11:15:05Z

2

You can try out the plugin that I created : flutter_search_panel. Not a dropdown plugin, but you can display the items with the search functionality.

Use the following code for using the widget :

    FlutterSearchPanel(
        padding: EdgeInsets.all(10.0),
        selected: 'a',
        title: 'Demo Search Page',
        data: ['This', 'is', 'a', 'test', 'array'],
        icon: new Icon(Icons.label, color: Colors.black),
        color: Colors.white,
        textStyle: new TextStyle(color: Colors.black, fontWeight: FontWeight.bold, fontSize: 20.0, decorationStyle: TextDecorationStyle.dotted),
        onChanged: (value) {
          print(value);
        },
   ),

edited Aug 30, 2018 at 11:15

answered Aug 30, 2018 at 7:03

dranzer

312 bronze badges

1 Comment

elixenide Over a year ago

Welcome to the site! While this may answer the question, it is better to provide the actual information here and not just a link. Link-only answers are not considered good answers and will probably be deleted.

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