GuidedAction setEnable won't change the text color

Question

I'm developing an Android TV application which is using Leanback library. There is a login form with email, password and a login button. I'd like to enable the login button only when the email and password are valid.

Here is my code:

mLoginButtonAction = new GuidedAction.Builder(this.getActivity())
            .id(id)
            .title(title)
            .description(desc)
            .build();
actions.add(action);

I disable it at first:

mLoginButtonAction.setEnabled(false);

And then enable it when it's valid:

mLoginButtonAction.setEnabled(valid);

The button is then enabled and I'm able to click it. But the color of the button is still the same color as in disable mode. Any idea? Thanks.

Answer 1

Modification to actions do not trigger notifications to the GuidedStepFragment and must be done so manually.

To notify an action change you first need the items index.

int idx = findActionPositionById(actionId);

Get and modify your action

GuidedAction someAction = getActions().get(idx);
someAction.setEnabled(valid);

Next notify the fragment of the update

notifyActionChanged(idx);