Cannot get camera list by android NDK

tham

Trying to build an app with Qt5.12.3 and android ndk, but cannot get camera list by "ACameraManager_getCameraIdList".

Mobile : Sony xperia XA1 Ultra
Qt: 5.12.3
NDK : r19c
minimum target: 24
maximum target: 28
Android library link to : libcamera2ndk.so and libmediandk.so, I link to the libs of api 28, not 24(android-28\arch-arm\usr\lib)
permissions: <uses-permission android:name="android.permission.CAMERA"/>
arch : armeabi-v7a

Extra so files I add into the project

contains(ANDROID_TARGET_ARCH, armeabi-v7a) {
    ANDROID_EXTRA_LIBS = \
        C:/Users/yyyy/programs/Qt/android_camera/../../../3rdLibs/Android/android-ndk-r19c-windows-x86_64/android-ndk-r19c/platforms/android-28/arch-arm/usr/lib/libcamera2ndk.so
}

Source codes:

#include "mainwindow.hpp"
#include <QApplication>

#include <QDebug>

#ifdef Q_OS_ANDROID

#include <android/log.h>

#include <camera/NdkCameraManager.h>

#include <QDebug>
#include <QtAndroid>
#include <QtAndroidExtras>

void myMessageHandler(
        QtMsgType type,
        const QMessageLogContext& context,
        const QString& msg
        )
{
    const char*const applicationName="android_camera";

    QString report=msg;
    if (context.file && !QString(context.file).isEmpty()) {
        report+=" in file ";
        report+=QString(context.file);
        report+=" line ";
        report+=QString::number(context.line);
    }
    if (context.function && !QString(context.function).isEmpty()) {
        report+=+" function ";
        report+=QString(context.function);
    }
    const char*const local=report.toLocal8Bit().constData();
    switch (type) {
    case QtDebugMsg:
        __android_log_write(ANDROID_LOG_DEBUG,applicationName,local);
        break;
    case QtInfoMsg:
        __android_log_write(ANDROID_LOG_INFO,applicationName,local);
        break;
    case QtWarningMsg:
        __android_log_write(ANDROID_LOG_WARN,applicationName,local);
        break;
    case QtCriticalMsg:
        __android_log_write(ANDROID_LOG_ERROR,applicationName,local);
        break;
    case QtFatalMsg:
        __android_log_write(ANDROID_LOG_FATAL,applicationName,local);
        abort();
    }
}

void open_android_camera()
{
    auto result = QtAndroid::checkPermission(QString("android.permission.CAMERA"));
    if(result == QtAndroid::PermissionResult::Denied){
        QtAndroid::PermissionResultMap resultHash =
                QtAndroid::requestPermissionsSync(QStringList({"android.permission.CAMERA"}));
        if(resultHash["android.permission.CAMERA"] == QtAndroid::PermissionResult::Denied){
            qInfo()<<__func__<<"permission deny";
        }else{
            qInfo()<<__func__<<"permission granted";
        }
    }

    qInfo()<<__func__<<"create camera manager";
    ACameraManager *camera_manager_ = ACameraManager_create();
    if(camera_manager_){
        qInfo()<<__func__<<"get camera ids";
        ACameraIdList *camera_ids = nullptr;
        auto const status = ACameraManager_getCameraIdList(camera_manager_, &camera_ids);
        qInfo()<<__func__<<"can get camera ids:"<<(camera_ids != nullptr)<<", status:"<<status;
        switch(status){
        case ACAMERA_OK:
            qInfo()<<__func__<<"ACAMERA_OK";
            break;
        case ACAMERA_ERROR_INVALID_PARAMETER:
            qInfo()<<__func__<<"ACAMERA_ERROR_INVALID_PARAMETER";
            break;
        case ACAMERA_ERROR_CAMERA_DISCONNECTED:
            qInfo()<<__func__<<"ACAMERA_ERROR_CAMERA_DISCONNECTED";
            break;
        case ACAMERA_ERROR_NOT_ENOUGH_MEMORY:
            qInfo()<<__func__<<"ACAMERA_ERROR_NOT_ENOUGH_MEMORY";
            break;
        default:
            qInfo()<<__func__<<"unknown status codes:"<<status;
        }
        if(camera_ids){
            qInfo()<<__func__<<"camera number:"<<camera_ids->numCameras;
        }
    }else{
        qInfo()<<__func__<<"cannot create camera manager";
    }
}

#endif

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

#ifdef Q_OS_ANDROID
    qInstallMessageHandler(myMessageHandler);
    open_android_camera();
#endif

    MainWindow w;
    w.show();

    return a.exec();
}

Error code returned by ACameraManager_getCameraIdList is -866653748, none of the value of NdkCameraError.h looks like that, weird

tham

Do I need to create an Activity and initialize the camera in the onResume function?

tham

I think I know why(guess), although my phone support camera2, but sony disable the api, please check this post for more details.