Item Click Listeners

To implement an item click listener and/or an item long click listener, you can create an interface in your adapter:

public class CustomAdapter extends RecyclerView.Adapter<CustomAdapter.ViewHolder> {

    public interface OnItemClickListener {

        void onItemSeleted(int position, View view, CustomObject object);
    }

    public interface OnItemLongClickListener {

        boolean onItemSelected(int position, View view, CustomObject object);
    }

    public final class ViewHolder extends RecyclerView.ViewHolder {

        public ViewHolder(View itemView) {
            super(itemView);
            final int position = getAdapterPosition();

            itemView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    if(mOnItemClickListener != null) {
                        mOnItemClickListener.onItemSeleted(position, view, mDataSet.get(position));
                    }
                }
            });
            
            itemView.setOnLongClickListener(new View.OnLongClickListener() {
                @Override
                public boolean onLongClick(View view) {
                    if(mOnItemLongClickListener != null) {
                        return mOnItemLongClickListener.onItemSelected(position, view, mDataSet.get(position));
                    }
                }
            });
            
        }
    }

    private List<CustomObject> mDataSet;

    private OnItemClickListener mOnItemClickListener;
    private OnItemLongClickListener mOnItemLongClickListener;

    public CustomAdapter(List<CustomObject> dataSet) {
        mDataSet = dataSet;
    }

    @Override
    public CustomAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.view_item_custom, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(CustomAdapter.ViewHolder holder, int position) {
        // Bind views
    }

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

    public void setOnItemClickListener(OnItemClickListener listener) {
        mOnItemClickListener = listener;
    }

    public void setOnItemLongClickListener(OnItemLongClickListener listener) {
        mOnItemLongClickListener = listener;
    }

}

Then you can set your click listeners after you create an instance of the adapter:

customAdapter.setOnItemClickListener(new CustomAdapter.OnItemClickListener {
    @Override
    public void onItemSelected(int position, View view, CustomObject object) {
        // Your implementation here
    }
});

customAdapter.setOnItemLongClickListener(new CustomAdapter.OnItemLongClickListener {
    @Override
    public boolean onItemSelected(int position, View view, CustomObject object) {
        // Your implementation here
        return true;
    }
});

Found a mistake? Have a question or improvement idea? Let me know.

Table Of Contents