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androidc++qtqt5qtandroidextras

What is the difference between QAndroidJniObject::callMethod() and QAndroidJniObject::callObjectMethod()?

I noticed that the Qt documentation offers two methods for calling android native methods but I can't figure out when to use QAndroidJniObject::callMethod and when to use QAndroidJniObject::callObjectMethod. What is the rule?

Solution

  • The main difference is that QAndroidJniObject::callMethod returns a primitive data type like jint or jbyte but QAndroidJniObject::callObjectMethod returns an object of type QAndroidJniObject.

    Using which one all depends on your needs and the return type of the function you want to call. If your function returns an object type like jobject, jstring, jarray,... then you should definitely use QAndroidJniObject::callObjectMethod. Otherwise you can use either of the two.