I have an ImageView on an Activity A, and a button on Activity B. 
The ImageView is set to "invisible". I was wondering if i could make the ImageView visible when the button is pressed and keep visible forever (until the user uninstalls the app or resets it).

I found this piece of code that makes the ImageView turn visible:

```
example.setVisibility(View.VISIBLE);

```

i know i should use SharedPreferences to make it work, but i tried many times, without success.

Can somebody help me?

Thank you so much.

P.s. What i have to do is to create (or simply make visible) a tick so that the user knows which level he completed. If there's another way, and i know there is, let me know.