How do I pass extra data from main activity to onBindViewHolder()?

[RhinoCan]

I've decided that when I present dates in my RecyclerView, I want the user to be able to see the dates in the format they want. Therefore, I have created a preference object for them that shows them several possibilities. All of the data for each item shown in the RecyclerView is coming from a MySQL database and the dates there are stored in YYYY-MM-DD format (e.g. 2018-08-01 for Aug 1, 2018). The Settings gives them the option of having the date in that format, 08/01/2018 or even as Wed Aug 1, 2018.

Since onBindViewHolder() needs to know the desired format of the date so that it can do the formatting, I either need to get that format in my main activity and pass it to onBindViewHolder() or pass it a reference to the SharedPreferences (it can't see them in the main activity from my Adapter). Unfortunately, I can't figure out how to do either.

I realize this is a generic technique, not something specific to Adapters but I've forgotten the technique and the vocabulary I need to search for it. Can anyone here remind me of the technique?

I had thought getting the preferred date format from the SharedPreferences in my main activity and then passing it to the Adapter might be easiest when I couldn't access the preferences directly (since I don't have a context) but even making the retrieved format public in the main activity doesn't make it visible in the Adapter.

 

[Deleted User]

Simply pass the SharedPreferences object into your Adapter class via its constructor. It's then accessible to all methods within that class.

MyAdapter adapter = new MyAdapter(SharedPreferences sharedPrefs);

 

[RhinoCan]

Simply pass the SharedPreferences object into your Adapter class via its constructor. It's then accessible to all methods within that class.

MyAdapter adapter = new MyAdapter(SharedPreferences sharedPrefs);

Of course! For whatever reason, that just didn't occur to me. Thank you!