小编Abh*_*bam的帖子

我想在指定的时间每天显示通知，并且我已经实现了显示每日通知的代码，但是在我想打电话时没有显示通知是行不通的。我正在使用这个插件链接

当我运行应用程序时，我在控制台上收到此警告，这是屏幕截图

我的代码实现是错误的吗？这是代码

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

class App extends StatefulWidget {
  @override
  _AppState createState() => _AppState();
}


class _AppState extends State<App> {
  FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin = new FlutterLocalNotificationsPlugin();

  showNotification() async{
    var time = new Time(3,51, 0);//at 3.30 
    var androidPlatformChannelSpecifics =
    new AndroidNotificationDetails('repeatDailyAtTime channel id',
        'repeatDailyAtTime channel name', 'repeatDailyAtTime description');
    var iOSPlatformChannelSpecifics =
    new IOSNotificationDetails();
    var platformChannelSpecifics = new NotificationDetails(
    androidPlatformChannelSpecifics, iOSPlatformChannelSpecifics);
    await flutterLocalNotificationsPlugin.showDailyAtTime(
        0,
        'Teer Result Time',
        'Open The App and check for the Result',
        time,
        platformChannelSpecifics); …

当我创建一个下拉按钮小部件时,我得到了这个错误,说RenderFlex溢出了右侧的无限像素.源代码是:

    import 'package:flutter/material.dart';

class test extends StatefulWidget {
  @override
  _testState createState() => _testState();
}

class _testState extends State<test> {

//gender
  List<DropdownMenuItem<int>> genderList = [];
  void genderLoad(){
    genderList.add(new DropdownMenuItem(child: new Text("Male"),value: 1,));
    genderList.add(new DropdownMenuItem(child: new Text("Female"),value: 2,));
  }
//end of gender


  @override
  Widget build(BuildContext context) {
    genderLoad();
    return Scaffold(
      body: new Container(
        child: new Center(

          child: new DropdownButton(items: genderList, onChanged: null),
        ),
      ),
    );
  }
}

在我构建程序后,我没有在应用程序上看到任何DropDownButton,而是在控制台上收到错误消息.以下是错误消息:

执行热重启...将文件同步到为x86构建的设备Android SDK ...在5,558ms内重新启动应用程序.

I/flutter (15333): ??? EXCEPTION CAUGHT BY RENDERING LIBRARY ??????????????????????????????????????????????????????????
I/flutter (15333): …