Calling Java function from Qt C++

Question

Is it possible to call java function from Qt Application and if so, how? Do I need to update java source for such task? I have Qt Desktop Opensource edition.

@Nejat, I have Qt Desktop edition, version 5.4 Opensource, do not have QAndroidJNIObject available I think; QtCreater does not find it if I do #include <QAndroidJNIObject>. — KernelPanic
– KernelPanic, Commented Feb 22, 2015 at 6:31
You should use JNI. It's kind of related to c++ not Qt. See : stackoverflow.com/questions/819536/… — Nejat
– Nejat, Commented Feb 22, 2015 at 6:47
But Qt now offers abstraction for it, and when using Qt, it is usually better to do things the "Qt way" stackoverflow.com/questions/27094100/… — dtech
– dtech, Commented Apr 17, 2015 at 15:07

POTEMKINDX · Accepted Answer · 2015-02-22 07:06:41Z

2

First of all think twice before calling java from C/C++. For Android it allow you call some API function of OS, but you pay with perfomance and some hard catching errors.

Qt designed pretty easy way for calling Java: package - androidextra But if you need call it on desktop there is a way to avoid it: JNI(as Nejat says).

Here is simple example of using it: http://www.codeproject.com/Articles/22881/How-to-Call-Java-Functions-from-C-Using-JNI

answered Feb 22, 2015 at 7:06

POTEMKINDX

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