flutter_dropdown 0.0.4

This does make Flutter Framework complicated dropdown button less complicated

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:flutter_dropdown/flutter_dropdown.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      // This call to setState tells the Flutter framework that something has
      // changed in this State, which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(), then the build method would not be
      // called again, and so nothing would appear to happen.
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              'You have pushed the button this many times:',
            ),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.display1,
            ),
            DropDown<String>(
              items: <String>["Male", "Female", "Other"],
              customWidgets: <Widget>[
                Row(
                  children: <Widget>[
                    Text("Male"),
                    CircleAvatar(
                      backgroundImage: NetworkImage(
                          "https://raw.githubusercontent.com/rrousselGit/provider/master/resources/expanded_devtools.jpg"),
                    ),
                  ],
                ),
                Row(
                  children: <Widget>[
                    Text("Female"),
                    CircleAvatar(
                      backgroundImage: NetworkImage(
                          "https://raw.githubusercontent.com/rrousselGit/provider/master/resources/expanded_devtools.jpg"),
                    ),
                  ],
                ),
                Row(
                  children: <Widget>[
                    Text("Other"),
                    CircleAvatar(
                      backgroundImage: NetworkImage(
                          "https://raw.githubusercontent.com/rrousselGit/provider/master/resources/expanded_devtools.jpg"),
                    ),
                  ],
                )
              ],
              hint: "Select gender",
              onChange: print,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}