OpenCV for Android with QTCreator

[aromano]

Hi, i am using QtCreator for build a simple app for android using OpenCV. The code compile succesfully only when there aren't OpenCV object. When i add a simple cv::Mat it fails with a lot of error of type "the vtable symbol may be undefined because the class is missing its key function" this is my .pro file:

QT       += core gui svg multimediawidgets androidextras

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = QR_test
TEMPLATE = app

# The following define makes your compiler emit warnings if you use
# any feature of Qt which has been marked as deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

CONFIG += c++11

SOURCES += \
        main.cpp \
        mainwindow.cpp

HEADERS += \
        mainwindow.h

FORMS += \
        mainwindow.ui

CONFIG += mobility
MOBILITY = 

linux:!android {
    # using pkg-config
    CONFIG += link_pkgconfig
    PKGCONFIG += opencv
}
INCLUDEPATH += /home/aromano/Work/OpenCV-android-sdk/sdk/native/jni/include/

android {
    LIBS += \
            -L"/home/aromano/Work/OpenCV-android-sdk/sdk/native/3rdparty/libs/armeabi-v7a/" \
            -L"/home/aromano/Work/OpenCV-android-sdk/sdk/native/libs/armeabi-v7a/" \
            -L"/home/aromano/Work/OpenCV-android-sdk/sdk/native/staticlibs/armeabi-v7a/" \
            -lcpufeatures \
            -lIlmImf \
            -llibjasper \
            -llibjpeg-turbo \
            -llibpng \
            -llibprotobuf \
            -llibwebp \
            -ltbb \
            -ltegra_hal \
            -lopencv_calib3d \
            -lopencv_core \
            -lopencv_dnn \
            -lopencv_features2d \
            -lopencv_flann \
            -lopencv_highgui \
            -lopencv_imgcodecs \
            -lopencv_imgproc \
            -lopencv_ml \
            -lopencv_objdetect \
            -lopencv_photo \
            -lopencv_shape \
            -lopencv_stitching \
            -lopencv_superres \
            -lopencv_video \
            -lopencv_videoio \
            -lopencv_videostab

    ANDROID_PACKAGE_SOURCE_DIR=$$_PRO_FILE_PWD_/android
}


# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

Thanks in advice for the reply.

[jsulm]

@aromano Can you post the build log?

[aromano]

@jsulm I have solved the issue. The problem was

-lopencv_core 

line. I have removed it and now it builds without errors.