刷卡后,当保存选项卡信息 [英] Saving tab information after swipe
问题描述
我在我的应用程序3个标签。
在我的第一个选项卡我需要从URL和使用用户位置读取JSON数据。它大约需要2-3秒加载页面。
我的问题开始时我实现的标签,而现在每一次IM旁边和背部刷卡,相关信息被重新读取。
I have 3 tabs in my application. In my first tab I need to read JSON data from URL and using the user location. It takes about 2-3 seconds to load the page. My problem starts when I implemented tabs, and now every time im swiping next and back, the info is re-fetched.
我尝试以下解决方案:
我搬到我的方法的 MainActivity ,然后创建一个变量名为 isUpdated 的,并将其更新为 1 如果该信息已被成功取出。自那时起,标签数据被刷卡走了之后,它显示的空白空的标签。
据我所知,标签数据被刷到另一个选项卡后擦拭,但我需要保存选项卡的内容。
I tried the following solution: I moved my method to the MainActivity, and created a variable named "isUpdated" and updated it to 1 if the info has been fetched successfully. since then, the tab data is gone after swiping and it shows blank empty tab. I understand that the tab data is wiped after swiping to another tab, but I need to save the tab content.
我如何保存选项卡信息,并显示用户刷卡到下一个选项卡后,无需一遍又一遍重新获取数据?
How I can save the tab information and show it after the user swiped to the next tabs, without re-fetching the data over and over again?
推荐答案
如果您使用的是 ViewPager
然后设定关闭屏幕页面限制,不同的东西。
if you are using ViewPager
then set your off screen page limit to something different
例如:
mViewPager.setOffscreenPageLimit(2);
应为3个标签足以
should be enough for 3 tabs
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