Fatal Exception running sketch in AndroidMode in emulator

Android Processing

bigfootsue

Fatal Exception running sketch in AndroidMode in emulator

in Android Processing • 24 days ago

I created a sketch that works when running in Processing Java mode. But when I try to run it in AndroidMode, it terminates with a Fatal Exception. The problem is because Android can't find my images in the data folder.

I read the image path in via an xml. When I'm running in "Java" mode, the path is set as \data\imagefolder. I append sketchPath in front and everything works. What do I need to set the path to in order for the sketch to work in Android? I tried using "file:\\\android_asset\imagefolder" and put my imagefolder under the assets folder but this failed.

I read somewhere that someone adjust the .classpath xml to make this work. If so, what are the adjustments to this file?

Processing is great but this hiccup is frustrating. Please help.

Replies(3)

dimkir

Re: Fatal Exception running sketch in AndroidMode in emulator

23 days ago

HTH

bigfootsue

Re: Fatal Exception running sketch in AndroidMode in emulator

19 days ago

Several searches helped me understand that there is a fundamental difference of where resources need to be between Processing and Android. I know that Processing sees things in the data folder while Android expects them in Assets or res.

Final conclusion, a bit more work needs to be done in order to port Processing sketch into Android...more smoothly. Not as easy as one imagines.

One of my ideas is to create an I/O class that handles all of my sketch's data needs. It is my intention to shield incompatibility between the two environments. If anyone else has some other solution, I would greatly appreciate you sharing it.

dimkir

Re: Fatal Exception running sketch in AndroidMode in emulator

19 days ago

I know that Processing sees things in the data folder while Android expects them in Assets or res.

If to be more precise: processing only operates with files relative to the data directory AND only supports operations via loadStrings() saveStrings() loadBytes() saveBytes()

If you stick just to those functions, then you're more or less safe. If you start using pure-java functions and streams - then responsibility on portability is on you and the sketch isn't pure processing anymore.

Watchout:

On Android data "directory" is read only. At the moment in processing there's no "portable" way to implement writing to file.

In your application if you want to implement writing to strings, you need write to SQLite file. If you just specify path to SD: your sketch won't run on devices w/o SD Cards (or "unprotected" storage" ). Before you write to sdcard, you also have to ask system of whether card is mounted or not, and request path.

Also this may help:

http://stackoverflow.com/questions/5694933/find-an-external-sd-card-location

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