给个吐司提示

添加依赖

dependencies:
  fluttertoast: ^8.2.4

Pub get

下载依赖

封装提示工具类

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

class ToastUtils {
  static void showToast(String msg) {
    Fluttertoast.showToast(
      msg: msg,
      toastLength: Toast.LENGTH_SHORT, // 或 Toast.LENGTH_LONG
      gravity: ToastGravity.TOP, // 顶部TOP，中部CENTER
      timeInSecForIosWeb: 1,
      backgroundColor: Colors.black87,
      textColor: Colors.white,
      fontSize: 16.0,
    );
  }
}

调用示例

    account = _userNameController.text;
    password = _passwordNameController.text;
    if (TextUtils.isEmpty(account)) {
      return ToastUtils.showToast("请输入用户名");
    }
    if (TextUtils.isEmpty(password)) {
      return ToastUtils.showToast("请输入密码");
    }