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I have followed the instructions and made the following apps from Ch. 10: chapter10.pdf (appinventor.org)
However, after I loaded the questions/answers into the Make Quiz app, they are not appearing when I open the Take Quiz app. Instead, the "questions" label remains the same. I am able to find both the questions and answers in /getvalue when I go to the TinyWebDB server. -
I would also like to allow the quiz 'maker' to delete items from the questions and answers. By letting the user choose a question using the ListPicker component, and you can remove an item with the remove list item block. How would I implement this with blocks of code?
(Canned Reply: ABG- Export & Upload .aia)
Export your .aia file and upload it here.
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I used Do It on your TakeQuiz app in the Companion to see what was in your two global lists, QuestionList and AnswerList.
QuestionList was an empty list, and AnswerList was full of questions.
That should get you started.
Given the detour taken by the answers coming from TinyWebDB, the code that receives data from TinyWebDB bears examination.
What is it comparing to 'questions' ?
The tag on the incoming data, or its value, which will never equal the literal 'questions' ?
Is the issue coming from my blocks of code within the MakeQuiz app or TakeQuiz? The only difference in the blocks of code versus the textbook is attached in these screenshots and is from the MakeQuiz portion. I am not sure how else to make it work.
I still haven’t figured it out and have been working at for some time now. Can you please help me solve the solution? I’m trying to learn from the textbook and my blocks of code match what the textbook has.
To debug this code, you must make it expect the unexpected, and it must check for the impossible and report it to you via the Notifier component.
Use the block that has an OK button to get a chance to read the error message.
Things to report:
TinyWebDB results not a list
TinyWebDB results empty
TinyWebDB tag not 'questions' but also not 'answers'
...
P.S. After you have done all this and if still stumped, use the Companion Do It to show us your global variables.
You have just confused me even more so.
Do you know the difference between tag and value?
Now look again at the last screenshot... @ABG marked it with a black arrow...
Can you see your error now?
Taifun
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Oh goodness, I cannot believe I overlooked that all this time. My apologies.
How would I implement blocks of code to allow the quiz 'maker' to delete items from the questions and answers and letting the user choose a question using the ListPicker component, and they can remove an item with the remove list item block. Since it is a shared server, I keep getting random questions uploaded into my quiz.
You might want to use your own server
Taifun
Are you able to help and demonstrate how I could use the ListPicker component to choose a question and remove an item with the remove list item block, removing from both lists and updating the database?
What have you tried? Show us a screenshot of your relevant blocks
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 
Taifun.
Have not tried much yet. It was just one of the modifications the textbook recommended so I was wondering if someone could show me how it is done.
Was Chapter 19 of no help to you ?
Maybe you should use your own tags, like NewKidQuestions and KewKidAnswers ?
No, Ch. 19 is outdated and does not discuss anything with implementing ListPicker with TinyWebDB.