Android service java method is returning always same value to Qt Android service

[ismail]

I'm trying to return value to Qt service from java service code. Java always returns initial value for variable. However when I run same code in Qt main activity, it is working.

Code in BackService java class:

public static int SAYK = 0;

public static void callNorm(int valSy) {
    BackService.SAYK = valSy;
    System.out.println("Result= "+BackService.SAYK);
}

public static int retStt() {
    return BackService.SAYK;
}

C++ code in Qt Service:

int jobj = QAndroidJniObject::callStaticMethod<jint>("org/qtproject/example_v2/BackService",
                                                     "retStt",
                                                     "()I");

When I call "callNorm" function from java, system prints new value of SAYK. But when I call "retStt" from Qt service, it returns only initial value 0. I tried also with callStaticObjectMethod, getStaticField, java native functions(gives unsatisfied link error) etc. Unfortunately, none of these worked. Also I can call java functions that has not return value from Qt Service, without problems.

[raven-worx]

@ismail
IIRC since you calling from Qt (which runs in a separate thread) you get separate static variables other than the java thread.

Try if that works for you:

jint jobj;
QtAndroid::runOnAndroidThreadSync([&jobj](){
    jobj = QAndroidJniObject::callStaticMethod<jint>("org/qtproject/example_v2/BackService",
                                                     "retStt",
                                                     "()I");
});

[ismail]

Unfortunately it didn't work. I still get the same value. Any other suggestion?