Can not using the QAccelerometer in the android service

[mr_roman]

Good evening. Sorry for my bad english :-(
For several days i cannot solve the problem with start QAccelerometer in the android background service.

I am developing the android service as separate .so file.
In the service i write the following code:
in .h file:

    private: 
        QAccelerometer *m_sensor;

in .cpp file (in the constructor class):

    GSensorClass::GSensorClass(QObject *parent) : QObject(parent)
    {
        m_sensor = new QAccelerometer(this);
        connect(m_sensor, SIGNAL(readingChanged()),
                    this, SLOT(onReadingChanged()));
        m_sensor->setAlwaysOn(true); 
        m_sensor->start();
    }

Unfortunately, the method start returns false(( If i call m_sensor->error(), it returns 0 (zero).

In the service and main application .pro file i added Qt += sensors.
In AndroidManifest.xml of the main application i added:

    <uses-feature android:name="android.hardware.sensor.accelerometer" />

If this code run under android GUI application, it works fine and i can access to x,y and z coordinates, but if this code run in the android service, then m_sensors->start(); returns false.

Maybe I'm doing something wrong? I really hope, that this problem can be solved, using Qt.
Please, help me.
Thanks!