List Error with View Big PDF extension

lỗi này thì fix như thế nào ạ

Difficult to know without seeing your blocks, where you set and call a list?

khi chạy thì xảy ra lỗi ạ

Go to the designer, find the clock component and uncheck the checkbox, which says Enabled

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 Tutorials for MIT App Inventor to learn the basics of App Inventor, then try something and follow the Top 5 Tips: How to learn App Inventor


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

làm như thế nào ạ

có cách nào để phạm vi trang theo ý muốn không nhưng không phải phạm vi 50 trang, ví dụ [[0,20],[21,50],[51,99],[100,125]]

The start page and end page should allow you to do this?

phải thực hiện lệnh đó như thế nào?