Exchanging data between Android Activity and Qt cpp

mrdebug

This is my native cpp function

void OnNFCState(jstring Value) {
   Environment->GetStringUTFChars(Value, nullptr);
}

and this is the java side

private static native void OnNFCState(java.lang.String Value);

The app goes to crash at the line

 Environment->GetStringUTFChars(Value, nullptr);

How can I have a QString from java.lang.String?
Is jstring corresponding to java.lang.String?

KroMignon

void OnNFCState(jstring Value) {
Environment->GetStringUTFChars(Value, nullptr);
}

I know this post is old, but just see it today for the first time. To resolve your issue, simply use QAndroidJniObject::toString(), like this:

void OnNFCState(jstring Value) {
   qDebug() << "Value is" << QAndroidJniObject(Value).toString();
}