RecyclerView onClick for multiple buttons and handling from Activity

Question

I\'m using RecyclerView with CardView and inside the CardView have 2 buttons. Now, have implemented the onClick events by imp

Answer 1

Please, try this principle to create a communication between activity, adapter through the interface, I hope this principle helps you:

Model Class:

public class YourModel {

    private String firstName;
    private String lastName;

    public YourModel(String firstName, String lastName) {
        this.firstName = firstName;
        this.lastName = lastName;
    }

    //... setters & getters
}

Interface:

public interface AdapterCallback {
    void onClickCallback(YourModel itemModel);
}

Adapter:

public class YourAdapter extends RecyclerView.Adapter {

    private List data;
    private AdapterCallback callback;
    private Context context;

    public YourAdapter(List data, AdapterCallback callback) {
        this.data = data;
        this.callback = callback
    }

    @Override
    public YourAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        context = parent.getContext();
        LayoutInflater inflater = LayoutInflater.from(context);
        View item = inflater.inflate(R.layout.item_recycler, parent, false);
        return new ViewHolder(item);
    }

    @Override
    public void onBindViewHolder(YourAdapter.ViewHolder holder, int position) {
        YourModel itemModel = data.get(position);

        String lastName  = itemModel.getLastName();  
        String firstName = itemModel.getFirstName();

        holder.tvFirstName.setText(firstName);
        holder.tvLastName.setText(lastName);

        holder.tvFirstName.setOnClickListener { 
           callback.onClickCallback(itemModel));
        }
    }

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

    static class ViewHolder extends RecyclerView.ViewHolder {

        private TextView tvFirstName;
        private TextView tvLastName;

        ViewHolder(View itemView) {
            super(itemView);
            tvFirstName = (TextView) itemView.findViewById(R.id.tv_first);
            tvLastName  = (TextView) itemView.findViewById(R.id.tv_last);
        }

}

Activity:

public class MyActivity extends AppCompatActivity implements AdapterCallback {

private YourAdapter adapter;
private List items;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    // 1. init your list && fill it with needed data
    // 2. init your adapter 
    // 3. put your list as parameter into constructor + interface
    items = new ArrayList()
    items.add(YourModel("John", "Doe"));
    items.add(YourModel("Bob", "Marley"));
    adapter = new YourAdapter(items, this)
}

@Override
public void onClickCallback(YourModel itemModel) {
    Toast.makeText(this, itemModel.getFirstName(), Toast.LENGTH_SHORT).show();
}

I think that this information is enough to understand what I mean. The same principle you can create multiple OnClick methods in your interface or put one onClick for a few buttons and check id or something else to get needed information that you need. Good luck