如何将集团添加到现有小部件

Question

我想在该代码中添加 bloc

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

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

class _MyAppState extends State<MyApp> {
  String statusText = "";
  bool isComplete = false;

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Builder(
        builder: (context) => Scaffold(
          drawer: Drawer(

我想在其他地方调用 startRecord 方法

Future<bool> checkPermission() async {
    if (!await Permission.microphone.isGranted) {
      PermissionStatus status = await Permission.microphone.request();
      if (status != PermissionStatus.granted) {
        return false;
      }
    }
    return true;
  }

  void startRecord() async { //`need to call this method in other places when onPressed`
    bool hasPermission = await checkPermission();
    if (hasPermission) {
      statusText = "Recording...";
      recordFilePath = await getFilePath();
      isComplete = false;
      RecordMp3.instance.start(recordFilePath, (type) {
        statusText = "Record error--->$type";
        setState(() {});
      });
    } else {
      statusText = "No microphone permission";
    }
    setState(() {});
  }

我无法在其他地方调用方法，出现错误。 onPressed

时，如何使用 bloc 窗口小部件结构轻松地呼叫其他地方