我无法在活动中导入java.util.date [英] I can't import java.util.date in activity

问题描述

在我的项目中，我需要使用当前日期和时间.为此，我要导入java.util.Date. 数小时前，此导入工作正常.但是我在R文件中有一个错误(r无法解决)，并且此错误是由于某些xml错误引起的.当我解决该问题并再次同步项目时，该错误消失了.但是之后，我无法在我的任何项目中导入(java.util.Date，java.util.Calendar).

In my project I need to to use current date and time. For this I'm importing java.util.Date. This import is working fine few hours ago. But I have an error in R file ( r cannot resolve ) and this error is because of some xml mistake. When I resolved that issue and sync project again that error is gone. But after that I cannot able to import (java.util.Date , java.util.Calendar) in any of my project.

我试图将其导入到我新创建的项目中.但是仍然找不到java.util.Date. 即使在我的旧项目中，这种导入在几天前仍然可以正常工作.当前它无法正常工作并显示红色.

I tried to import this in my newly created project. But still not found java.util.Date. Even in my old projects where this import is working fine few days ago. Currently it is not working and showing red.

import java.util.Calendar;

import java.util.Date;

日期和日历显示为红色.

Date and Calendar are showing in red.

Date d=new Date();

SimpleDateFormat sdf=new SimpleDateFormat("hh:mm");

上述Date和SimpleDateFormat以红色显示. 当我将鼠标悬停在那儿并按(control + alt)时，IDE将提供导入java.sql.Date而不是java.util.Date的选项.

Above Date and SimpleDateFormat are showing in red. And when I hover over there and press (control+alt) IDE will give option to import java.sql.Date not java.util.Date.

推荐答案

我一次在java.util.calendar上遇到了此问题.使缓存/重启无效对我有用.

I had this issue one time with java.util.calendar. Invalidating Cache/Restart worked for me.

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