Recyclerview - How Do I Pass The Position Of Onbindviewholder To My Viewholder Class?

I am trying to setup onClickListeners inside my ViewHolder class, but I need the position of each. How can I pass the position from onBindViewHolder to my ViewHolder class? @NonNu

Solution 1:

this adapter from my other project :

publicclassChildrenRvAdapterextendsRecyclerView.Adapter<ChildrenRvAdapter.ViewHolder> {

    private List<String> mData;
    private LayoutInflater mInflater;
    private ItemClickListener mClickListener;
    private Context context;

    publicChildrenRvAdapter(Context context, List<String> data) {
        this.mInflater = LayoutInflater.from(context);
        this.mData = data;
        this.context = context;
    }

    @Overridepublic ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        Viewview= mInflater.inflate(R.layout.children_rv_row, parent, false);
        returnnewViewHolder(view);
    }

    @OverridepublicvoidonBindViewHolder(ViewHolder holder, int position) {
        Stringname= mData.get(position);
        holder.tv_name.setText(name);
        setAnimation(holder.itemView, position);
    }

    @OverridepublicintgetItemCount() {
        return mData.size();
    }

    publicclassViewHolderextendsRecyclerView.ViewHolder implementsView.OnClickListener {
        TextView tv_name;
        Button btn_remove;

        ViewHolder(View itemView) {
            super(itemView);
            tv_name = itemView.findViewById(R.id.tv_name);
            btn_remove = itemView.findViewById(R.id.btn_remove);
            btn_remove.setOnClickListener(this);
        }

        @OverridepublicvoidonClick(View view) {
            if (mClickListener != null) mClickListener.onItemClick(view, getAdapterPosition());
        }
    }

    String getItem(int id) {
        return mData.get(id);
    }

    publicvoidsetClickListener(ItemClickListener itemClickListener) {
        this.mClickListener = itemClickListener;
    }

    publicinterfaceItemClickListener {
        voidonItemClick(View view, int position);
    }

    }
}

so you create interface in your adapter and also declare it in local mClickListener and implement it in ViewHolder class and setonclick where you create the viewholder:

    ViewHolder(View itemView) {
        super(itemView);
        tv_name = itemView.findViewById(R.id.tv_name);
        btn_remove = itemView.findViewById(R.id.btn_remove);
        btn_remove.setOnClickListener(this);
    }

just note that i set it on a button but you can set it on itemView also on any view that have the setOnClickListener so you can use :

itemView.setOnClickListener(this);

then from your activity or fragment and wherever using the adapter, just implemet the onlickinterface and after initializing the adapter use the method that we created public void setClickListener in our adapter, to local interface in the adapter

publicvoidsetClickListener(ItemClickListener itemClickListener) {
    this.mClickListener = itemClickListener;
}

activity:

publicclassChildrenEditDialogextendsDialogimplementsIChildren.IView, ChildrenRvAdapter.ItemClickListener

and in activity onCreate or somewhere else:

 childrenRvAdapter = newChildrenRvAdapter(c, dataSource);
    childrenRvAdapter.setClickListener(this);

and you have onlcick in your activity/fragment/dialog/etc...

Solution 2:

Use ViewHolders getAdapterPosition() for getting current position of ViewHolder.

Solution 3:

To get the current position of the onBindViewHolder to ViewHolder class getAdapterPosition() can be used.

As an example,

publicclassViewHolderextendsRecyclerView.ViewHolder{
    LinearLayout viewHolderLayout;

    viewHolderLayout = itemView.findViewById(R.id.item_child_layout);

    publicViewHolder(@NonNull View itemView) {
        super(itemView);

        viewHolderLayout.setOnClickListener(v -> {
            lastClickedPosition = getAdapterPosition();
        });

    }
}