Qt3D shows blank screen on Android device

[tech2nick]

Hi guys,
I'm working on Augmented Reality mobile app on Android. I wanted to use some 3d models in it, so I decided to use Qt. I used one of the examples embedded in QtCreator, namely "Scene3D QML Example" It works perfectly on PC, while on Android phone it shows only blank screen. Other QML apps (which don't use Qt3D) works without problems on my phone. Have anyone encountered such problem? I don't know wheter there's something wrong with my phone or just my Qt? I have Android 4.4 on my phone.

Edit: I tried another example: "Cube", which uses pure C++ and OpenGL ES and it works well. So probably the problem lies in QML with Qt3D?

Here's my code:

• main.cpp

#include <QGuiApplication>
#include <QQuickView>

int main(int argc, char **argv)
{
    QGuiApplication app(argc, argv);

    QQuickView view;

    view.resize(500, 500);
    view.setResizeMode(QQuickView::SizeRootObjectToView);
    view.setSource(QUrl("qrc:/main.qml"));
    view.show();

    return app.exec();
}

• main.qml

import QtQuick 2.0
import QtQuick.Scene3D 2.0

Item {
    Text {
        text: "Click me!"
        anchors.top: parent.top
        anchors.topMargin: 10
        anchors.horizontalCenter: parent.horizontalCenter

        MouseArea {
            anchors.fill: parent
            onClicked: animation.start()
        }
    }

    Text {
        text: "Multisample: " + scene3d.multisample
        anchors.bottom: parent.bottom
        anchors.bottomMargin: 10
        anchors.horizontalCenter: parent.horizontalCenter

        MouseArea {
            anchors.fill: parent
            onClicked: scene3d.multisample = !scene3d.multisample
        }
    }

    Rectangle {
        id: scene
        anchors.fill: parent
        anchors.margins: 50
        color: "darkRed"

        transform: Rotation {
            id: sceneRotation
            axis.x: 1
            axis.y: 0
            axis.z: 0
            origin.x: scene.width / 2
            origin.y: scene.height / 2
        }

        Scene3D {
            id: scene3d
            anchors.fill: parent
            anchors.margins: 10
            focus: true
            aspects: ["input", "logic"]
            cameraAspectRatioMode: Scene3D.AutomaticAspectRatio

            AnimatedEntity {}
        }
    }

    SequentialAnimation {
        id: animation

        RotationAnimation {
            to: 45
            duration: 1000
            target: sceneRotation
            property: "angle"
            easing.type: Easing.InOutQuad
        }
        PauseAnimation { duration: 500 }
        NumberAnimation {
            to: 0.5
            duration: 1000
            target: scene
            property: "scale"
            easing.type: Easing.OutElastic
        }
        PauseAnimation { duration: 500 }
        NumberAnimation {
            to: 1.0
            duration: 1000
            target: scene
            property: "scale"
            easing.type: Easing.OutElastic
        }
        PauseAnimation { duration: 500 }
        RotationAnimation {
            to: 0
            duration: 1000
            target: sceneRotation
            property: "angle"
            easing.type: Easing.InOutQuad
        }
    }
}

• AnimatedEntity.qml

import Qt3D.Core 2.0
import Qt3D.Render 2.0
import Qt3D.Input 2.0
import Qt3D.Extras 2.0

import QtQuick 2.0 as QQ2

Entity {
    id: sceneRoot

    Camera {
        id: camera
        projectionType: CameraLens.PerspectiveProjection
        fieldOfView: 45
        nearPlane : 0.1
        farPlane : 1000.0
        position: Qt.vector3d( 0.0, 0.0, 40.0 )
        upVector: Qt.vector3d( 0.0, 1.0, 0.0 )
        viewCenter: Qt.vector3d( 0.0, 0.0, 0.0 )
    }


    components: [
        RenderSettings {
            activeFrameGraph: ForwardRenderer {
                camera: camera
                clearColor: "transparent"
            }
        },
        InputSettings { }
    ]

    PhongMaterial {
        id: material
    }

    TorusMesh {
        id: torusMesh
        radius: 5
        minorRadius: 1
        rings: 100
        slices: 20
    }

    Transform {
        id: torusTransform
        scale3D: Qt.vector3d(1.5, 1, 0.5)
        rotation: fromAxisAndAngle(Qt.vector3d(1, 0, 0), 45)
    }

    Entity {
        id: torusEntity
        components: [ torusMesh, material, torusTransform ]
    }

    SphereMesh {
        id: sphereMesh
        radius: 3
    }

    Transform {
        id: sphereTransform
        property real userAngle: 0.0
        matrix: {
            var m = Qt.matrix4x4();
            m.rotate(userAngle, Qt.vector3d(0, 1, 0))
            m.translate(Qt.vector3d(20, 0, 0));
            return m;
        }
    }

    QQ2.NumberAnimation {
        target: sphereTransform
        property: "userAngle"
        duration: 10000
        from: 0
        to: 360

        loops: QQ2.Animation.Infinite
        running: true
    }

    Entity {
        id: sphereEntity
        components: [ sphereMesh, material, sphereTransform ]
    }
}