How to Set Onclicklistener on Recyclerview Item in a Fragment

OnClickListener in RecyclerView in Fragment

add itemView.setOnClickListener(this); in adapter ViewHolder

Recyclerview onclick to open new fragment

First setup a click listener:

Set a click listener on the ViewHolder object.

  override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): AracMarkaViewHolder {

    var inflater = LayoutInflater.from(parent.context)
    var arackategori = inflater.inflate(R.layout.arac_kategori, parent, false)

    return AracMarkaViewHolder(arackategori).also {
       arackategori.setOnClickListener { clickHandler.forwardClick(it) }
    }
}

We setup a listener, where we invoke the function forwardClick(holder: AracMarkaViewHolder). We pass the current inflated view holder reference to it so that we can do any future operations on it.

Now setup an interface:

We create an interface because we want any click event to be handeled by the activity. Those events, in your case include, launching a new fragment.

interface ClickEventHandler {
    fun forwardClick(holder: AracMarkaViewHolder)
}

Now in your adapter, setup the interface like this:

private val clickHandler: ClickEventHandler = context as ClickEventHandler 

Modify adapter class signature:

Now, we need to slightly modify adapter's constructor.

var MyAdapter = AracMarkaAdapter(araclarKategori, requireContext()) //We pass the activity's context. 

And your adapter class signature should look something like this:

 class AracMarkaAdapter(tumKategori: ArrayList<AracMarka>, context: Context) :
   RecyclerView.Adapter<AracMarkaAdapter.AracMarkaViewHolder>() {
        private val clickHandler: ClickEventHandler = context as ClickEventHandler 
  }   

Implement the interface:

Now we implement the interface in the activity.

class MainActivity : AppCompatActivity(), ClickEventHandler  {
  override fun forwardClick(holder: AracMarkaViewHolder) {
     //Launch a new fragment here.
  }
}

how to passing data when clicked on item fragment with recyclerview to activity

First create a new interface anywhere like below (ClickListener.java):

interface ClickListener {
    void onClickData(String value);
}

Then add it in the Adapter as a constructor parameter.

Also there is no need for the Context parameter in the Adapter (at least I haven't found any context requirement.)

However if you need context in onBindViewHolder, you should use holder.itemView.getContext()

public class NettvAdapter extends RecyclerView.Adapter<NettvAdapter.MenuItemViewHolder> {
private final List<item_kenh> recyclerViewItems;
private listener ClickListener;


public NettvAdapter(List<item_kenh> recyclerViewItems, ClickListener listener) {
    this.recyclerViewItems = recyclerViewItems;
    this.listener = listener;
}

@Override
public NettvAdapter.MenuItemViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {

    View itemLayoutView = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.item_kenh, null);
    return new MenuItemViewHolder(itemLayoutView);
}



@Override
public void onBindViewHolder(NettvAdapter.MenuItemViewHolder holder, final int position) {

    final item_kenh fp = (item_kenh) recyclerViewItems.get(holder.getAdapterPosition());

    //menuItemHolder.titles.setText(fp.getTitle());
   // menuItemHolder.profile.setText(fp.getProfiles());
    String url = fp.getUrl_images();
    Picasso.get().load(url).into(holder.thumb);

    holder.thumb.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
           listener.onClickData(fp.getUrl_images());
        }
    });
}


@Override
public int getItemCount() {
    return recyclerViewItems.size();
}


public class MenuItemViewHolder extends RecyclerView.ViewHolder {
   // public TextView titles;
    public ImageView thumb;
   // public TextView profile;
   // public LinearLayout lineLayout;

    MenuItemViewHolder(View itemLayoutView) {
        super(itemLayoutView);

       // titles      = (TextView) itemLayoutView.findViewById(R.id.title);
        thumb       = (ImageView) itemLayoutView.findViewById(R.id.imageView);
        //profile     = (TextView) itemLayoutView.findViewById(R.id.profiles);
        //lineLayout = (LinearLayout) itemLayoutView.findViewById(R.id.midlelayout);


    }
}

Then implement ClickListener in your Fragment:

Tab1_Fragment extends Fragment implements ClickListener {

@Override 
void onClickData(String clickedValue) {
    Intent int_detail = new Intent(getContext(), PlayerActivity.class);
    int_detail.putExtra("url_img", clickedValue);
    getActivity().startActivity(int_detail);
  }
}

And initialise your Adapter same as before:

mAdapter = new NettvAdapter(mRecyclerViewItems, this);

Different onClick for each and every Recyclerview item

You should use if condition in onBindViewHolder of your adpter class as bellow:

override fun onBindViewHolder(holder: ViewHolder, position: Int) {
    holder.item.setOnClickListener {
        when (position) {
            0 -> {
                //navigate to first fragment}
            }
            1 -> {
                //navigate to second fragment}
            }
            2 -> {
                //navigate to third fragment}
            }
            3 -> {
                //navigate to fourth fragment}
            }
        }
    }
}

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