Sample usage of the Codename One Dialog class taken from the kitchen sink demo

DialogUsage.java

final Button show = new Button("Show Dialog");
final Button showPopup = new Button("Show Popup");
cnt.add(show).add(showPopup);
show.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent evt) {
        Dialog.show("Dialog Title", "This is the dialog body, it can contain anything...", "OK", "Cancel");
    }
});
showPopup.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent evt) {
        Dialog d = new Dialog("Popup Title");
        TextArea popupBody = new TextArea("This is the body of the popup", 3, 10);
        popupBody.setUIID("PopupBody");
        popupBody.setEditable(false);
        d.setLayout(new BorderLayout());
        d.add(BorderLayout.CENTER, popupBody);
        d.showPopupDialog(showPopup);
    }
});

Sample usage code for https://www.codenameone.com/javadoc/com/codename1/ui/Dialog.html and Button action handling

From the Codename One project