Want to store & read the data from file

Data Storage
1

Want to store data in a file & read while opening the app

2

Use the file component

A very good way to learn App Inventor is to read the free Inventor's Manual here in the AI2 free online eBook App Inventor 2 Book: Create Your Own Android Apps ... the links are at the bottom of the Web page. The book 'teaches' users how to program with AI2 blocks.
There is a free programming course here Course In A Box and the aia files for the projects in the book are here: App Inventor 2 Book: Create Your Own Android Apps
How to do a lot of basic things with App Inventor are described here: How do you...? .

Also do the tutorials Our Tutorials! to learn the basics of App Inventor, then try something and follow the Top 5 Tips: How to learn App Inventor

Taifun

Trying to push the limits! Snippets, Tutorials and Extensions from Pura Vida Apps by icon24 Taifun.

3

Use your app to translate then read it: 用文件管理器去储存你的数据（设置一个滚动列表去储存并更新实时的数据，用计时器作为触发条件、调用文件管理器导出你列表中的数据并添加到文件里面）。然后你需设置一个：在屏幕初始化的时候读取文件（找你本地的文件路径填进去），你可以把它转为列表之类的方便你后面用。但是要注意了，你的文件格式必须是CSV的，而且得是utf8的，否则mitappinventor不能读取。