如何从 RecyclerView 适配器访问 viewPager 适配器内的片段实例

Question

I have a process for creating a new restaurant. This is a 5 stage process which I built with a view pager and 5 fragments.

one of the fragments is for the user to upload photos of the place.

My problem starts, when I want to allow users to remove certain photos.

How, from within the recyclerAdapter's instance for that photo, I can remove it from the adapter itself, which is inside a fragment in the viewPager? The viewPager fragments are single instances, and I can't access them, so I'm a bit lost.

Answer 1

Your instance of RecyclerView.Adapter should have a reference to the underlying data it's diplaying eg an array or a list of photos in your case.

The underlying data are used inside your Adapter's implementation of onBindViewHolder() to fill the RecyclerView.ViewHolder at the given position.

To remove a photo, your fragment has to remove the corresponding entry in the underlying data set, then refresh the view by calling your adapter's notifyDataSetChanged()