load shared library in android with dlopen

[mmjvox]

I'm trying to load a shared library on android with dlopen.

here is my code:

QFile ddd("/data/data/org.qtproject.example.Mobiledinamicload/files/libuntitled1armv7a.so");
    qDebug()<<ddd.exists();

    void *libuntitled1 = dlopen("/data/user/0/org.qtproject.example.Mobiledinamicload/files/libuntitled1armv7a.so", RTLD_LAZY);
        if (!libuntitled1) {
            qDebug()<<"szzzzzzzzzzz";
        }

but not works and writes this errors on console:

D libMobile_dinamic_load_armeabi-v7a.so: true
D libMobile_dinamic_load_armeabi-v7a.so: szzzzzzzzzzz
I qtMainLoopThrea: type=1400 audit(0.0:37736): avc: denied { open } for path="/data/data/org.qtproject.example.Mobiledinamicload/files/libuntitled1armv7a.so" dev="mmcblk0p19" ino=245815 scontext=u:r:untrusted_app:s0:c512,c768 tcontext=u:object_r:app_data_file:s0 tclass=file permissive=1

it works on android studio and i can use the library :

extern "C" JNIEXPORT jstring JNICALL
Java_aaa_bbb_testnativecppqt_MainActivity_stringFromJNI(
        JNIEnv* env,
        jobject /* this */) {
    std::string hello_str ="Hello from C++ shared library";


    void *libuntitled1 = dlopen("/data/data/aaa.bbb.testnativecppqt/files/libuntitled1armv7a.so", RTLD_LAZY);
    if (!libuntitled1) {
        hello_str ="cant load shared library";
        return env->NewStringUTF(hello_str.c_str());
    }

// call functions from library

    return env->NewStringUTF(hello_str.c_str());
}

load with QLibrary not works too:

        auto path = QStandardPaths::writableLocation(QStandardPaths::AppDataLocation);
        QString fileName= path+"/libuntitled1armv7a.so";
        QFile ddd(fileName);
        qDebug()<<ddd.exists();
    QLibrary myLib(fileName);
    qDebug()<<myLib.isLibrary(fileName);
    qDebug()<<myLib.load();
    qDebug()<<myLib.errorString();

here is the error of QLibrary:

D libMobile_dinamic_load_armeabi-v7a.so: true
D libMobile_dinamic_load_armeabi-v7a.so: true
I qtMainLoopThrea: type=1400 audit(0.0:38721): avc: denied { open } for path="/data/data/org.qtproject.example.Mobiledinamicload/files/libuntitled1armv7a.so" dev="mmcblk0p19" ino=245778 scontext=u:r:untrusted_app:s0:c512,c768 tcontext=u:object_r:app_data_file:s0 tclass=file permissive=1
D libMobile_dinamic_load_armeabi-v7a.so: false
D libMobile_dinamic_load_armeabi-v7a.so: "Cannot load library /data/user/0/org.qtproject.example.Mobiledinamicload/files: (dlopen failed: library \"_data_user_0_org.qtproject.example.Mobiledinamicload_files\" not found)"

--> my phone is rooted and i can copy any file to any path manually and change files permissions

[jsulm]

You are showing 3 different libraries:

• a.so
• libuntitled1.so
• libdynamic1enginearmeabi-v7a.so
  You say libuntitled1.so works in Android Studio. Did you try to load that lib with QLibrary? Did you compare the access rights for all these 3 libraries?

[mmjvox]

@jsulm
All these files are the same.
I changed the name of the library during various tests and I wrote down the errors elsewhere.
I forgot to correct them when writing this topic.
Thanks for letting me know.
I corrected them now.