[Android-development] JNI crash with parameter from Java

[raven-worx Software]

Hi,

i just can't figure out whats going wrong with this simple example:

C++:

void CallJavaMethod()
{
     QAndroidJniObject::callStaticMethod<void>( "package/path/to/MyActivity",
                                                "MyMethod",
                                                "(Ljava/lang/String;)V",
                                                 
QAndroidJniObject::fromString("some-text").object<jstring>() );
}

//registered with JNI
void Callback( jstring str )
{
     // as soon as i try to access the jstring the crash occurrs
}

Java:

public static void MyMethod( String str )
{
     SendCallback( str /*even with new String(str)*/ ); //native C++  
method -> Callback()
}


So pretty straight forward, but i receive the following error as soon  
as i try to access the received jstring in C++:

JNI DETECTED ERROR IN APPLICATION: use of invalid jobject

What am i doing wrong?


I am testing on Android 6.
let me know if you need further info.