flutter_windmill/lib/pages/home_page.dart

import 'dart:math';

import 'package:flutter_windmill/views/windmill.dart';
import 'package:fluttertoast/fluttertoast.dart';
import 'package:record/record.dart';
import 'package:flutter/material.dart';

class HomePage extends StatefulWidget {
  const HomePage({super.key});

  @override
  State<HomePage> createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  final Record record = Record();
  double radius = 0; // 旋转角度

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: Column(
          children: [
            Text(
              "小风车",
              style: TextStyle(fontSize: 18),
            ),
            Text("用嘴巴吹小风车，用力吹转的越快！"),
            SizedBox(
              height: 300,
              width: 100,
              child: CustomPaint(
                size: const Size(100, 300),
                painter: Windmill(
                  radians: radius,
                ),
              ),
            ),
          ],
        ),
      ),
    );
  }

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

  @override
  void dispose() {
    super.dispose();
    stopRecord();
  }

  void startRecord() async {
    bool hasPermission = await record.hasPermission();
    if (hasPermission) {
      await record.start();
      record
        ..onStateChanged().listen((event) {
          // logger.v(event.toString());
        })
        ..onAmplitudeChanged(const Duration(milliseconds: 200)).listen((event) {
          double scale = 1 / event.current;
          final r = (scale * 0.1 * 2 * pi).abs();
          radius += r;
          radius = radius > (2 * pi) ? radius - (2 * pi) : radius;
          // logger.v(radius.toString());
          if (mounted) {
            setState(() {});
          }
        });
    } else {
      Fluttertoast.showToast(msg: '无录音权限');
    }
  }

  void stopRecord() async {
    if (await record.isRecording()) record.dispose();
  }
}