如何从Activity访问List Adapter创建的UI元素？

Question

In my code now, I have a DetailActivity, which simply calls a ListAdapter class to populate a ListView.

Within the ListAdapter class, I am inflating some custom views, some of which contain Buttons.

Back from within my DetailActivity, I would like to be able to access these buttons to enable/disable them depending on certain user actions. Is there a way to do this?

I guess the larger question is: from an Activity, how can I grab a reference to any element (buttons, imageviews, textviews,etc) that are created from an Adapter?

Thank you!

Answer 1

I assume you have a List<Object> that is sent through the constructor of ListAdapter. Just add a boolean isEnable to the Object , and then in your getView() method, add this line:

button.setEnabled(getItem(position).isEnable);

In your DetailActivity , you can change isEnable as you wish. And remember to adapter.notifyDataSetChanged() to get it worked.