lisawray's groupie library is giving me a headache

Question

I'm learning Android development, while following a tutorial made by Lets Build this App ( on Youtube ). He used this library and I tried too, but I'm failing. I created a RecyclerView and tried to make a GroupAdapter using Groupie like this:

newmessage_view.adapter = groupAdapter

This is what he does in the video, but when I do it, it gives me an error:

Type mismatch.
Required:
(RecyclerView.Adapter<android.support.v7.widget.RecyclerView.ViewHolder!>?..RecyclerView.Adapter<*>?)
Found:
GroupAdapter<com.xwray.groupie.ViewHolder>

I hope someone can help me.

looks like you did something wrong in your code. Sorry for obvious note, but nothing more to say here. — Vladyslav Matviienko, Dec 07 '18 at 13:34
looks like your `GroupAdapter` does not extend `RecyclerView.Adapter` — Vladyslav Matviienko, Dec 07 '18 at 18:58

score 4 · Answer 1 · answered Sep 26 '19 at 02:22

4

In the new version of Groupie, you need to do as follows

    val adaptor = GroupAdapter<GroupieViewHolder>()

and make sure to add

    import com.xwray.groupie.kotlinandroidextensions.GroupieViewHolder

answered Sep 26 '19 at 02:22

Nawaraj Bista

326
4
12

score 3 · Answer 2 · answered Dec 25 '18 at 23:48

3

If you were using the newest version 2.3.0, change to 2.1.0. It works just fine!

answered Dec 25 '18 at 23:48

AndrinoG

71
1
8

score 1 · Answer 3 · answered Jun 07 '19 at 10:29

1

If you are using Kotlin you need to create adapter this way

val adapter = GroupAdapter<ViewHolder>()

answered Jun 07 '19 at 10:29

Valgaal

896
10
25

score 1 · Answer 4 · answered Feb 25 '20 at 12:28

1

Well i was also following same tutorial and was facing same issue but i resolved by replacing Recycler.Viewholder to GroupieViewHolder.

answered Feb 25 '20 at 12:28

Noman Zafar

61
5

Gary McGowan · Answer 5 · 2021-02-02T13:05:07.683

0

For me I needed to:

val adapter = GroupAdapter<GroupieViewHolder>()

AND remember to override createViewHolder if using the groupie legacy approach

class MyItem(...) : Item<MyItem.MyViewHolder>() {
    ...
    override fun createViewHolder(itemView: View) = MyViewHolder(itemView)
    ...
    class MyViewHolder(view: View) : GroupieViewHolder(view) {
        // Bind Views
    }
}

edited Feb 02 '21 at 13:05

answered Feb 02 '21 at 12:59

Gary McGowan

1,641
15
12

lisawray's groupie library is giving me a headache

5 Answers5