I have been trying the following example for Camera Testing using Qt 5.3.1 for Android

import QtQuick 2.3
import QtQuick.Window 2.1
import QtMultimedia 5.0

Window {
visible: true
width: 360
height: 360
Item {
anchors.fill: parent

Camera {
id: camera

imageProcessing.whiteBalanceMode: CameraImageProcessing.WhiteBalanceFlash

exposure

{ exposureCompensation: -1.0 exposureMode: Camera.ExposurePortrait }

flash.mode: Camera.FlashRedEyeReduction
}

VideoOutput

{ source: camera anchors.fill: parent focus : visible // to receive focus and capture key events when visible }

}
}

But on running the example on my phone, it just displays a Blank White Screen. But the same example runs on my laptop (Ubuntu 14.04) nicely.
Have attached the complete log.