Problem with TaifunFile extension

[Fabian Pedrosa]

Hi everybody!

I´m trying to use TaifunFile extension and I´m experiencing some weird (at least that seems to me) problems.

Whem I add the extension and try to list a directory, it works once in a while, but most of the time the app crashes

and android offers to open it again but to no avail.

The attached image shows highlighted with yellow border line the block I´m pretty sure causes the crash. I really don´t know what to do. My need is obtain a list of files names from a specific directory, just that.

Thanks in advance.

Fabián

[Taifun]

the blocks look fine

how many images are there in that directory?

to find out more about the Runtime Error, you can use Logcat

I normally use Eclipse and Logcat there, but if you have installed the App Inventor Software (see also http://appinventor.mit.edu/explore/ai2/setup-emulator.html), you already have everything you need to use logcat...

How to use Logcat

1. connect your device using USB with your computer
   
2. in File Manager go to the App Inventor directory, which is  C:\Program Files\App Inventor or similar
   
3. press Shift and right mouse click the subdirectory commands-for-Appinventor to get the context menu
   
4. select "open command window here" and you will get a command window of that subdirectory
   
5. enter adb logcat *:E and the logcat will start running and log all errors
   
6. start your app to elicit the error
7. copy the log (see below)

To copy your log, right click, click "select all" and enter to copy the complete log into the clipboard, then open Notepad and paste it using ctrl-v.

Taifun

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

[Fabian Pedrosa]

Hi.

There are only 4 jpgs in the subdirectory.

I don´t have Emulator installed. So, using logcat is somewhat far away from me right now.

Sometimes (only sometimes), the error message is something related to "Null asignment to array" (or similar). If I can I´ll capture a screen and attach the screenshot. But most of the time the app only crashes at start (the blocks I´ve shown are in Screen.Initialize).

Thanx!

Fabián

[TimAI2]

Probably need to see the whole screen initialise,

and you may want to remove elements one at a time until you find the one causing the problem...

[Taifun]

from your screenshot we also can see, you are using 7 clocks... why do you need 7 clocks?

there might be happening too much at the same time... you are also connecting to a SSID  in parallel...

and what happens in the Clock7.Timer event, Clock7 was started before using the FileListAsync method?

temporarily you might want to do different things step by step to see if it works then...

for example first connect to the wifi and if the connection is done, then continue with something else etc etc.

Taifun

[Fabian Pedrosa]

Long story short. 7 clocks were used in previous iterations of this app. The only one that is necessary here is Clock 7 IIRC.

WiFi works as expected. I´ll post the whole init block later today.
I´ve done things step by step and the file list is the apparent cause of troubles.

More info coming soon.

Thanx.

F.

[Taifun]

does the test project "Test FileList" downloadable from here work for you?

https://puravidaapps.com/file.php

Taifun

[Fabian Pedrosa]

I'll try that and let you know.

Thanx!

[Fabian Pedrosa]

Hi.
I´ve just compiled and tried FileList app. When pressing 1st button runtime error happens (see attached picture).
When I press the 2nd button (Async), the app crashes (see other image).

Any ideas?

Thanx!

[Taifun]

this happens because of the missing permission READ_EXTERNAL_STORAGE

I added the permission blocks (see screenshot) for you into the example project, just download it and try again

Taifun

[Fabian Pedrosa]

Thanx! I´ll let you know during this day.

[Taifun]

this thread continues here https://groups.google.com/d/msg/mitappinventortest/suCQ74ImNGU/Ql--d2GtAQAJ

Taifun