How to load the XmlListModel successfully?

[a.burks]

My app retrieves installed Android apps for a launcher in a Java class, that passes an xml string to a c++ class and the last one to a QML file. The XML string is correct, and the model seem to be loaded but no list entries are added.

Here is the code snipped of the Java class:

public static String getApplist(Activity a){
    String list="<?xml version=\"1.0\" encoding=\"UTF-8\"?><root>";
    final PackageManager pm = a.getPackageManager();
    Intent i = new Intent(Intent.ACTION_MAIN, null);
    i.addCategory(Intent.CATEGORY_LAUNCHER);
    List<ResolveInfo> availableActivities = pm.queryIntentActivities(i, 0);
    for (ResolveInfo ri:availableActivities) {
        list+="<item>";
        list+="<name>"+ri.activityInfo.packageName+"</name>";
        list+="<label>"+String.valueOf(ri.loadLabel(pm))+"</label>";
        list+="</item>";
    }
    list+="</root>";
    return list;
}

The value returned to the C++ class:

QString Launcher::getApplist(){
    QAndroidJniObject activity = QAndroidJniObject::callStaticObjectMethod("org/qtproject/qt5/android/QtNative", "activity", "()Landroid/app/Activity;");
    QAndroidJniObject str = QAndroidJniObject::callStaticObjectMethod("com/myapp/launcher/worker/AppWorker", "getApplist", "(Landroid/app/Activity;)Ljava/lang/String;", activity.object<jobject>());
    return str.toString();
}

And here is the QML snippet:

XmlListModel {
    id: xmlModel
    xml: launcher.getApplist()
    query: "/root/item"

    XmlRole {
        name: "package"
        query: "name/string()"
    }
    XmlRole {
        name: "label"
        query: "label/string()"
    }

    onCountChanged: {
        console.log("Cound changed: " + count)
    }

    onStatusChanged: {
        switch (status) {
            case XmlListModel.Null:
                console.log("Status changed to null")
                break
            case XmlListModel.Ready:
                console.log("Status changed to ready")
                ...
                break
            case XmlListModel.Loading:
                console.log("Status changed to loading")
                break
            case XmlListModel.Error:
                console.log("Status changed to error: " + errorString())
                break
            default:
                console.log("Status changed to anything else")
        }
    }
}

In the log I can see, that the model is loading and then ready. But onCountChange() is never reached and the model is not working for the GridView. It's only working I remove the line in the Java code, where the label is loaded.

Has someone an idea?

[a.burks]

I think the reason of the missing data was an impact of an error in another component or in the simulator. I could successfully test my code with a physical device. I have updated the component, that has created the XML data.