如何在Dart中将时间戳字符串从24小时格式转换为12小时格式? [英] How to convert time stamp string from 24 hr format to 12 hr format in dart?

问题描述

我正在处理flutter应用程序，其中我必须显示时间戳，但是我从api获得的响应是​​24小时格式，并且我想在我的应用程序中以12小时格式显示时间.

我想以这种格式显示在应用程序上 您能帮我解决从24小时到12小时格式化的最简单方法吗?

解决方案

@Umair，正如Sam指出的那样，您可以使用

24小时时间戳字符串

  class MyAppState扩展了State< MyApp>{@override窗口小部件build(BuildContext context){字符串timeStamp24HR ="2020-07-20T18:15:12";返回MaterialApp(家:脚手架(appBar:AppBar(标题:Text('Test')，)，身体:填充(填充:EdgeInsets.all(20.0)，孩子:中心(子级:Text(新的DateFormat.jm().format(DateTime.parse(timeStamp24HR))，样式:TextStyle(fontSize:18.0)，)，))))；}} 

截屏:

此处提供有关Flutter解析方法的更多信息- https://api.flutter.dev/flutter/dart-core/DateTime/parse.html

I am working on flutter application where i have to show time stamps but the response i got from api is in 24 hr format and i want to display time in 12 hr format in my application.

And i want to display on application in this format Can you please help me regarding the easiest way of doing the formatting from 24 hr to 12 hr?

解决方案

@Umair, as Sam pointed out, you can use intl package and can use jm() function without explicitly declaring the format like so,

For default DateTime

class MyAppState extends State<MyApp> {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        home: Scaffold(
            appBar: AppBar(
              title: Text('Test'),
            ),
            body: Padding(
                padding: EdgeInsets.all(20.0),
                child: Center(
                  child: Text(new DateFormat.jm().format(DateTime.now()), style: TextStyle(fontSize: 18.0),),
                )
            )
        ));
  }
}

Screenshot:

For 24 hr timestamp string

class MyAppState extends State<MyApp> {
  @override
  Widget build(BuildContext context) {
    String timeStamp24HR = "2020-07-20T18:15:12";

    return MaterialApp(
        home: Scaffold(
            appBar: AppBar(
              title: Text('Test'),
            ),
            body: Padding(
                padding: EdgeInsets.all(20.0),
                child: Center(
                  child: Text(new DateFormat.jm().format(DateTime.parse(timeStamp24HR)), style: TextStyle(fontSize: 18.0),),
                )
            )
        ));
  }
}

Screenshot:

More info on Flutter's parse method here - https://api.flutter.dev/flutter/dart-core/DateTime/parse.html

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