Unsolved QAndroidJniObject::callstaticobjectmethod return empty string
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Hello I have this code:
QAndroidJniObject string = QAndroidJniObject::callStaticObjectMethod<jstring>("com/app/utils/MyParams", "getEmpty"); qDebug() << "stringContent:" << string.toString(); QAndroidJniObject jniParam = QAndroidJniObject::fromString("name" ); QAndroidJniObject jniParamValue = QAndroidJniObject::callStaticObjectMethod( "com/app/utils/MyParams" // class name , "getStaticParam" // method name , "Ljava/lang/String;" // signature , jniParam.object<jstring>() ); qDebug() << "param:" << jniParam.toString();
on java:
public static String getStaticParam(String param){ String realParamName = "Param_ " + param; return realParamName; } public static String getEmpty(){ String realPath = "EMPTY"; return realPath; }
When I call the 'getEmpty' method it works ok, console prints 'stringContent:EMTPY' but when I call the second method it always return an empty string, I don't know why.
I read that maybe I need to add the return type to the function (QAndroidJniObject::callStaticObjectMethod<jstring>) but doing that gives me an error on QT.
"no matching function for call to 'callStaticObjectMethod'"
what Im missing?