Add action on ObservableList item in javafx - javafx-2

Question

I am using javafx to make a ListView in which add Observable List which contains buttons.
I want to add action on each buttons in this lists.Any help...
ObservableList videoLists = null;
if (listView.getSelectionModel().getSelectedItem().equals("class 8")) {
classTitleID.setText("class 8 video lists");
File physicsFolder = new File("D:\\videos\\physics");
File[] listOfFiles = physicsFolder.listFiles();
videoLists = FXCollections.observableArrayList();
for (File file : listOfFiles) {
if (file.isFile()) {
videoLists.add(new Button(file.getName()));
physicsListview.setItems(videoLists);
}
}
}

Answer 1

simply do
for (File file : listOfFiles) {
if (file.isFile()) {
Button button = new Button(file.getName());
button.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent actionEvent) {
//your action
}
});
videoLists.add(button);
physicsListview.setItems(videoLists);
}
}

Answer 2

It's generally a bad idea to have Node subclasses as the data type in ListViews (or TableViews, ComboBoxes, etc): it breaks MVC. Make your ListView a ListView<File> and use a cellFactory to show the button in the ListView cells. You can set the action handler there.
ListView<File> physicsListview = new ListView<>();
ObservableList<File> videoLists = FCollections.observableArrayList();
//...
for (File file : listOfFiles) {
if (file.isFile()) {
videoLists.add(file);
}
}
physicsListview.setItems(videoLists);
physicsListview.setCellFactory(new Callback<ListView<File>, ListCell<File>>() {
#Override
public ListCell<File> call(ListView<File>()) {
final Button button = new Button();
return new ListCell<File>() {
#Override
public void updateItem(final File item, boolean empty) {
super.updateItem(item, empty);
if (empty) {
setGraphic(null);
} else {
button.setText(item.getName());
button.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
// handle action.
// You can access the File object item here if needed
}
});
setGraphic(button);
}
}
};
});
});