Android: the visible property of input method is always false

import QtQuick 2.2
import QtQuick.Layouts 1.1

Rectangle {
    width: 360
    height: 360
    ColumnLayout {
        TextInput {
            text: qsTr("Hello World")
            Layout.preferredHeight: 200
            Layout.fillWidth: true

        }
        Text {
            text: Qt.inputMethod.visible ? "keyboard visible" : "keyboard not visible"
            Layout.fillHeight: true
            Layout.fillWidth: true
        }
    }
}