App_Flutter/lib/utils/util.dart

import 'package:app_settings/app_settings.dart';
import 'package:fast/view/component/alert_widget.dart';
import 'package:flutter/material.dart';

class Util {
  Size boundingTextSize(String text, TextStyle style,
      {int maxLines = 2 ^ 31, double maxWidth = double.infinity}) {
    TextPainter textPainter = TextPainter(
        textDirection: TextDirection.ltr,
        text: TextSpan(text: text, style: style),
        maxLines: maxLines)
      ..layout(maxWidth: maxWidth);
    return textPainter.size;
  }

  int getYearFromTimenum(int num) {
    String dayNum = num.toString();
    return int.parse(dayNum.substring(0, 4));
  }

  int getMonthFromTimenum(int num) {
    String dayNum = num.toString();
    return int.parse(dayNum.substring(4, 6));
  }

  int getDayFromTimenum(int num) {
    String dayNum = num.toString();
    return int.parse(dayNum.substring(6, 8));
  }

  String checkFormateDate(DateTime date,DateTime now){
    if (date.day == now.day){
      return '今天'+ date.hour.toString().padLeft(2,'0')+':'+date.minute.toString().padLeft(2,'0');
    }
    DateTime yesterday = DateTime.fromMillisecondsSinceEpoch(now.millisecondsSinceEpoch-24*3600*1000);
    if (date.day==yesterday.day){
      return '昨天'+ date.hour.toString().padLeft(2,'0')+':'+date.minute.toString().padLeft(2,'0');
    }
    DateTime tomorrow = DateTime.fromMillisecondsSinceEpoch(now.millisecondsSinceEpoch+24*3600*1000);
    if (date.day==tomorrow.day){
      return '明天'+ date.hour.toString().padLeft(2,'0')+':'+date.minute.toString().padLeft(2,'0');
    }
    return date.month.toString().padLeft(2,'0')+'月'+date.day.toString().padLeft(2,'0')+'日 '+ date.hour.toString().padLeft(2,'0')+':'+date.minute.toString().padLeft(2,'0');
  }

  String betweenTime(DateTime start,DateTime end){
    int seconds = (end.millisecondsSinceEpoch-start.millisecondsSinceEpoch)~/1000;
    // int hours = seconds~/3600;
    // int minutes = seconds%3600~/60;
    // String str = '';
    // if (hours>0){
    //   str = hours.toString()+'小时';
    // }
    // if (minutes>0){
    //   str = str+minutes.toString()+'分钟';
    // }
    return betweenTimeBySeconds(seconds);
  }
  String betweenTimeBySeconds(int seconds){
    int hours = seconds~/3600;
    int minutes = seconds%3600~/60;
    String str = '';
    if (hours>0){
      str = hours.toString()+'小时';
    }
    if (minutes>0){
      str = str+minutes.toString()+'分钟';
    }
    return str;
  }

  void showNotificationStatus(BuildContext context) {
    showDialog(
        context: context,
        barrierDismissible: false,
        barrierColor: const Color(0xF2000D1F),
        builder: (BuildContext context) {
          return AlertWidget(
              title: '为了您的计时能得到及时提醒\n请开启fast16cc为你提供的消息通知推送',
              confirm: '去开启',
              confirmCallback: () {
                AppSettings.openNotificationSettings();
                Navigator.of(context).pop();
              });
        });
  }
}