flutter_ali_camera/example/lib/main.dart

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

import 'package:flutter/services.dart';
import 'package:flutter_ali_camera/flutter_ali_camera.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await FlutterAliCameraController.initializeSdk();
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  FlutterAliCameraController _controller = FlutterAliCameraController();
  double value = 0;

  @override
  void initState() {
    super.initState();
    initPlatform();
  }

  Future<void> initPlatform() async {
    await _controller.create();
    setState(() {});
  }

  void _onPlatformViewCreated() {
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        backgroundColor: Colors.white,
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Column(
          children: <Widget>[
            SizedBox(
              width: double.maxFinite,
              height: 200,
              child: _controller.buildView(_onPlatformViewCreated),
            ),
            Row(
              mainAxisAlignment: MainAxisAlignment.spaceEvenly,
              children: <Widget>[
                IconButton(icon: Icon(Icons.play_arrow, size: 26,), onPressed: () {
                  _controller.startPreview();
                }),
                IconButton(icon: Icon(Icons.pause, size: 26,), onPressed: () {
                  _controller.stopPreview();
                }),
              ],
            ),
            SizedBox(height: 5,),
            Slider(value: value, max: 100, onChanged: (value) {
              _controller.setBeauty(value.toInt());
              setState(() {
                this.value = value;
              });
            }),

          ],
        ),
      ),
    );
  }
}