Flutter -如何获取和存储可调扁平按钮的宽度

LayoutBuilder(
  builder: (BuildContext context, BoxConstraints constraints) {
    double buttonWidth = constraints.maxWidth;
    // 在这里可以使用按钮的宽度进行其他操作
    return FlatButton(
      onPressed: () {},
      child: Text('Button'),
    );
  },
)

import 'package:shared_preferences/shared_preferences.dart';

// 存储按钮宽度
void storeButtonWidth(double width) async {
  SharedPreferences prefs = await SharedPreferences.getInstance();
  await prefs.setDouble('buttonWidth', width);
}

// 获取按钮宽度
Future<double> getButtonWidth() async {
  SharedPreferences prefs = await SharedPreferences.getInstance();
  double width = prefs.getDouble('buttonWidth') ?? 0.0;
  return width;
}