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Running a Java program with a .dll from Adobe AIR's native process

Answer 1

A:

I have 0 experience with Air, but this reminded me of a Java issue I once spent some time figuring out. I don't have a suggestion on why the scanning doesn't work, but I think a stack trace would be your best friend right now.

I'm guessing you're relying on this line to capture and display it?

nativeProcess.standardOutput.readUTFBytes(nativeProcess.standardOutput.bytesAvailable);

However, you are writing IOExceptions to System.err - is there a nativeProcess.standardError you could read in Air? Alternatively, output everything to System.out.

Lauri Lehtinen 2010-06-18 15:48:17

I changed the exceptions to output to stdout and added a listener for stderr on the Flex side. Still Nothing back.

Donny 2010-06-18 16:00:15

Does your AIR app display the "Start"?

Lauri Lehtinen 2010-06-18 16:01:32

Yes. If I take out the SourceManager line then the Java app just echos back whatever it receives on stdin

Donny 2010-06-18 16:08:23

Answer 2

+1 A:

When calling Java add this -Djava.library.path=location_of_dll to the command line

Romain Hippeau 2010-06-18 15:49:05

Added the absolute path as a command line argument just like that. Still nothing.

Donny 2010-06-18 16:00:35

You totally solved it. I misunderstood and used C:\Program Files\JTwain\AspriseJTwain.dll when I should have simply supplied the directory, C:\Program Files\Jtwain. To be clear to everyone else, the fix was to add the line arg.push("-Djava.library.path=C"\\Program Files\\JTwain"); to my code.Thanks a ton!

Donny 2010-06-18 16:25:58

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Running a Java program with a .dll from Adobe AIR's native process

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