Find files in the phone

MIT App Inventor Help
1

Hi, I'm making an app that takes photos and stores them in a specific folder with a specific name: DATE_TIME_NUM.jpg.
Then I created a search filter based on the parameters: "exact date" and "from date ... to date" and put these values ​​into specific variables.
Now I'm stuck! how do I do a search the phone storage and show the selected files?
For example: find all photos with date 08/10/2021 and show them in a list.
better if you can see a small preview of the image...

2

Use a sql database for easy sorting and flltering... you could have a table there, which has one column, the filename... for easier filtering, the filename should follow this logic: YYYYMMDD_NUM.jpg

This query would give you the filenames you are looking for:
SELECT filename FROM myTable WHERE filename LIKE '20211008%' ORDER BY filename

I can offer my sqlite extension App Inventor Extensions: SQlite | Pura Vida Apps ... there are also other sqlite extensions around, however these might be outdated meanwhile...

Taifun

3

thanks a lot.

4

I took a look to your extension... Actually I think it is a bit too hard for my level in programming... I will need some more knowledge...

5

Probably you want to read this first: What is SQLite and what is a relational database?

Please see here for the SQL syntax.
Please see here for some SQLite tutorials.

Taifun

6

Thanks again. I will look.

7

Maybe something like this:
When taking a picture, create a new folder in a shared folder (with the date) and copy / move the picture to this folder e.g. /Pictures/myPictures/october-10-2021/, use 2 ListPicker (one for picking from date and one for picking image). In this way the photos also appear in the gallery:

8

thanks Anke.
now I can move the file to a new directory and rename it with the extension TaifunFile:

blocks (1)
blocks (1)1665×627 38.9 KB

but when I try to show the image, the link seem to be wrong it doesn't show anything... where is the mistake?

9

doesn't matter... I found the solution: if I dont put the files in /DCIM/... but in /storage/emulated/0/Pictures/... it works!
I still dont know why, but it works

10

another question: how can I to pick a file?
could you share the blocks of the app you posted?
thanks

11

/DCIM/... should also work.

As I said, use a ListPicker.

12

Ok, but how do I insert the elements of list picker?

13

grafik
grafik1701×546 65.3 KB

14

Thanks, it is a bit different from my idea, but it could also work. I will try some options.