[Android native] Custom functions gone from views when pushed in a NavigationView

Hi guys, I'm facing a problem using a NavigationView, but only if I build with Phonegap and then run app in my Android device (it's a Samsung Galaxy S4 running Android 4.4.2): the same exact code works fine if I test it locally in Chrome. This is the problem: if I define a function in a view and push that view in the Navigation one, then I can't use my custom function because console says me that it's undefined. To clarify, and also because my app is lot more complicated, I've build up a very simple demo.

This is the code of the Main view (the one generated by sencha cmd tool, by the way I use the 5.1.0.26 version):

Code:

Ext.define('demo.view.Main', {    extend: 'Ext.NavigationView',
    xtype: 'main',
    requires: [ 'Ext.dataview.List' ],
    config: {
        fullscreen: true,
        itemId: 'mainPage',
        items: [
            {
                title: "Demo",
                layout: 'fit',
                items: [
                    {
                        xtype: 'list',
                        itemTpl: '{text}',
                        data: [
                            { text: 'Item 1' },
                            { text: 'Item 2' },
                            { text: 'Item 3' }
                        ],
                        listeners: {
                            itemtap: function (list, index, item, record) {
                                var mainPage = list.up('#mainPage');
                                var subPage = demo.app.subPages[index];
                                console.log(subPage.greet);
                                mainPage.push(subPage);
                            }
                        }
                    }
                ]
            }
        ]
    }
});

An this is the code of the launch function of the app.js file:

Code:

launch: function() {        // Destroy the #appLoadingIndicator element
        Ext.fly('appLoadingIndicator').destroy();
        
        this.subPages = [
            {
                xtype: 'container',
                title: "Page 1",
                items: [
                    {
                        xtype: 'button',
                        text: 'Greet',
                        listeners: {
                            tap: function(btn){
                                btn.parent.greet();
                            }
                        }
                    }
                ],
                greet: function(){
                    alert("Hi!");
                }
            },
            {
                xtype: 'container',
                title: "Page 2",
                items: [
                    {
                        xtype: 'button',
                        text: 'Greet',
                        listeners: {
                            tap: function(btn){
                                btn.parent.greet();
                            }
                        }
                    }
                ],
                greet: function(){
                    alert("Hello!");
                }
            },
            {
                xtype: 'container',
                title: "Page 3",
                items: [
                    {
                        xtype: 'button',
                        text: 'Greet',
                        listeners: {
                            tap: function(btn){
                                btn.parent.greet();
                            }
                        }
                    }
                ],
                greet: function(){
                    alert("Nice to meet you!");
                }
            }
        ],
        
        // Initialize the main view
        Ext.Viewport.add(Ext.create('demo.view.Main'));
    }

The app starts and shows me the list with the 3 items: when I tap on one of them, in console I can see the body of my custom "greet" function (both in Chrome and Android). This, to be more precise:

Code:

function (){
    alert("Hi!");
}

But if in Android, I click on one of the buttons that should call that function, this is the error that comes up:

Code:

01-27 19:33:55.568: I/chromium(13540): [INFO:CONSOLE(1)] "Uncaught TypeError: Object [object Object] has no method 'greet'", source: file:///android_asset/www/app.js (1)

Hope you guys can help me, thanks in advance.



[Android native] Custom functions gone from views when pushed in a NavigationView