Application Export doesn`t work

markus.bu..

Application Export doesn`t work

in Integration and Hardware • 1 month ago

Hi all,

I am sure this question might have been asked already 100 times but I am doing it again, as I couldn`t find a solution to my problem.

I worked on a sketch, it works really nicely. But when I export it, I don`t get any error messages.

I use a bunch of libraries, like wordcram and cpcontrols.

All I get is either a white screen or just simply no reaction. The application icon will show in my dashboard and nothing happens.

I clicked in the exported application on a file which opened the terminal of the mac and gave me this
error.

Exception in thread "Animation Thread" java.lang.NullPointerException

at FinalSketch.getPersonaFileNames(FinalSketch.java:947)

at FinalSketch.setupGUI(FinalSketch.java:558)

at FinalSketch.setup(FinalSketch.java:90)

at processing.core.PApplet.handleDraw(PApplet.java:2245)

at processing.core.PGraphicsJava2D.requestDraw(PGraphicsJava2D.java:243)

at processing.core.PApplet.run(PApplet.java:2141)

at java.lang.Thread.run(Thread.java:680)

I understand that my app can not access a folder which contains some textfiles. Yet it works in the sketch :/

Thanks a lot in advance for any reply.

Replies(9)

dimkir

Re: Application Export doesn`t work

1 month ago

if you show us your function

at FinalSketch.getPersonaFileNames(FinalSketch.java:947)

then it will be easier to figure out what's the problem. Most likely some folder is in different location when you run sketch.

You should only load files from your "data" directory. And when you load them, you don't have to use any absolute path, just relative eg.

String[] myWords = loadStrings("mywords.txt"); // THIS IS CORRECT
String[] myWords = loadStrings("/users/myfiles/file.txt");
// this is not very correct will only work on your machine
String[] myWords = loadStrings("../../somefolder/file.txt"); // this will not work at all. very bad boy.

markus.bu..

Re: Application Export doesn`t work

1 month ago

hey thanks a lot :)

below is the function. The problem is that my sketch loads files from a folder and you can select those files from a drop-down menu.

String[] getPersonaFileNames() {

File folder = new File(sketchPath+"/data/Personas");

//println(folder.getAbsolutePath());

String[] files = folder.list();

println("### Personas ###");

for (int i=0; i < files.length;i++) {

files[i] = files[i].substring(0, files[i].indexOf("."));

println(files[i]);

}

return files;

}

PhiLho

Re: Application Export doesn`t work

1 month ago

General note about a not so known function:
File folder = new File(sketchPath+"/data/Personas");
can be:
File folder = dataFile("Personas");

When you exported your file, you got a .java file. Look what line is the 947 mentioned in the stack trace.
But I guess that folder.list() returns null because it cannot find the path, so files.length throws the NPE.

I think there is no folder after exporting the application, the files are in a jar, so the list() won't work. Perhaps you can hard-code the list in the sketch.

markus.bu..

Re: Application Export doesn`t work

1 month ago

hmmm but when I open the package then I can see the folder :/

dimkir

Re: Application Export doesn`t work

1 month ago

And what

//println(folder.getAbsolutePath());

will print when you run it as exported app?

technically you shoudln't be accessing sketchPath variable, but only either via

String s = sketchPath("data/Personas"); // function, not variable

or as PhiLho says:

String s = dataPath("Personas");

Also you can try putting one more conditional:

File folder = new File(sketchPath+"/data/Personas");

println(folder.getAbsolutePath());

if ( !f.exists() ){

println("file with absolute path above doesn't exist");

}

else{

println("Filepath above is reported as existing");
}

PhiLho

Re: Application Export doesn`t work

1 month ago

FYI, the sketchPath variable exists, too. But it is better to use the function, indeed.

markus.bu..

Re: Application Export doesn`t work

1 month ago

Hi everyone,

Thank you many times, I actually managed to get it work with your tips and my sketch runs in basic.

Part of my sketch is that it loads some textfiles which can be selected from a dropdown menu where a guy during a coding jam helped me with.

For some reasons it gives me now this mistake:

The file "/Users/burkardt/Documents/Processing/Flocksounds/FinalSketch/application.macosx64/data/Personas/Matt.txt" is missing or inaccessible, make sure the URL is valid or that the file has been added to your sketch and is readable.

Sep 5, 2013 4:33:29 PM controlP5.ControlBroadcaster printMethodError

SEVERE: An error occured while forwarding a Controller event, please check your code at controlEvent"

I am pretty sure the mistake lies here...

loadPersonaFile( sketchPath+"/data/Personas/"+personaMenu.getListBoxItems()[(int)personaMenu.getValue()][0]+".txt");

which I replaced with...

loadPersonaFile( dataFile("Personas")+personaMenu.getListBoxItems()[(int)personaMenu.getValue()][0]+".txt");

and then I get this error message:

/Users/burkardt/Documents/Processing/Flocksounds/FinalSketch/data/PersonasMarkus Burkardt.txt

The file "/Users/burkardt/Documents/Processing/Flocksounds/FinalSketch/data/PersonasMarkus.txt" is missing or inaccessible, make sure the URL is valid or that the file has been added to your sketch and is readable.

So somehow I don`t manage to sneak a "/" in there and load another textfile.

If you have any idea on it I would be super thankful. But already now this helped me a lot.

Thank you very much,

Markus

PhiLho

Re: Application Export doesn`t work

1 month ago

I don't understand. Do you mean you have a Personas folder inside the data folder, where you have several text files?
Then, indeed, add a slash after Personas.

markus.bu..

Re: Application Export doesn`t work

1 month ago

Exactly. The problem was that if I added it after Personas it somehow didn`t work and I got an error.

I solved it like this:

loadPersonaFile(dataFile("Personas")+ ("/")+personaMenu.getListBoxItems()[(int)personaMenu.getValue()][0]+".txt");

I have the impression it slowed my Application a bit down. BUT: It works ! :)

Thank you many times again for your help !

Top Reply