import QtQuick
import QtQuick.Dialogs
import QtQuick.Controls

Window {
    width: 640
    height: 480
    visible: true
    FileDialog {
        id: fileDialog
        onAccepted: console.log("File set correctly: " + selectedFile.toString())
        onRejected: console.log("FILE NOT SET! REJECTED!")
    }
    Button {
        id: b
        text: "File"
        onClicked: fileDialog.open()
    }
    Text {
        anchors.top: b.bottom
        text: fileDialog.selectedFile.toString() == "" ? "No file selected" : fileDialog.selectedFile.toString()
    }
}

qrc:/TestFileDialog/main.qml:10:5: QML FileDialog: Cannot set  as a selected file because it doesn't exist
qrc:/TestFileDialog/main.qml:10:5: QML FileDialog: Cannot set  as a selected file because it doesn't exist
File set correctly:

const QString selectedFilePath = selectedFile.toLocalFile(); // sets empty string for QUrl with android path