Question

修改

因为它是一个genericAdapter并不简单，我知道添加点击监听器的方法。在onCreateViewHolder中执行此操作并不是一个好习惯。这就是我需要更好建议的原因

我在android中为RecyclerView创建了通用适配器。现在我想要一些改进它的建议。我怎么能将clickListener添加到它。

GenericAdapter.java

public abstract class GenericAdapter<T> extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

    private Context context;
    private ArrayList<T> items;
    private OnRecyclerItemClicked onRecyclerItemClicked;

    public abstract RecyclerView.ViewHolder setViewHolder(ViewGroup parent);

    public abstract void onBindData(RecyclerView.ViewHolder holder, T val);

    public GenericAdapter(Context context, ArrayList<T> items){
        this.context = context;
        this.items = items;
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        RecyclerView.ViewHolder holder = setViewHolder(parent);
        return holder;
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        onBindData(holder,items.get(position));
    }

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

    public void addItems( ArrayList<T> savedCardItemz){
        items = savedCardItemz;
        this.notifyDataSetChanged();
    }

    public T getItem(int position){
        return items.get(position);
    }

    public void setOnRecyclerItemClicked(OnRecyclerItemClicked onRecyclerItemClicked){
        this.onRecyclerItemClicked = onRecyclerItemClicked;
    }

    public interface OnRecyclerItemClicked{
        void onItemClicked(View view,int position);
    }
}

并称之为

adapter = new GenericAdapter<MyModelClass>(context,listOfModelClass) {
                @Override
                public RecyclerView.ViewHolder setViewHolder(ViewGroup parent) {
                    final View view = LayoutInflater.from(context).inflate(R.layout.item_recycler_view, parent, false);
                    AViewHolder viewHolder = new AViewHolder(context, view);
                    return viewHolder;
                }

                @Override
                public void onBindData(RecyclerView.ViewHolder holder1, MyModelClass val) {
                        MyModelClass currentCard = val;

                        AViewHolder holder = (AViewHolder)holder1;
                        holder.cardNumber.setText(currentCard.getDisplayNumber());
                        holder.cardHolderName.setText(currentCard.getCardHolderName());
                }
            };
            mRecyclerView.setAdapter(adapter);

现在我如何以及在哪里添加点击监听器。向onBindData添加click侦听器是一种开销。需要建议。

Answer 1

您是否尝试过添加ViewHolder并将clicklistener添加到其中

现在GenericAdapter.java。

public abstract class GenericAdapter<T> extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

    private Context context;
    private List<T> items;
    private OnRecyclerItemClicked onRecyclerItemClicked;

    public abstract RecyclerView.ViewHolder setViewHolder(ViewGroup parent , OnRecyclerItemClicked onRecyclerItemClicked);

    public abstract void onBindData(RecyclerView.ViewHolder holder, T val);

    public abstract OnRecyclerItemClicked onGetRecyclerItemClickListener();

    public GenericAdapter(Context context, List<T> items){
        this.context = context;
        this.items = items;
        onRecyclerItemClicked = onGetRecyclerItemClickListener();
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        RecyclerView.ViewHolder holder = setViewHolder(parent , onRecyclerItemClicked);
        return holder;
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        onBindData(holder,items.get(position));
    }

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

    public void setItems( ArrayList<T> savedCardItemz){
        items = savedCardItemz;
        this.notifyDataSetChanged();
    }

    public T getItem(int position){
        return items.get(position);
    }

    public interface OnRecyclerItemClicked{
        void onItemClicked(View view,int position);
    }
}

并称之为

GenericAdapter<CreditCardItemBO> adaptering = new GenericAdapter<CreditCardItemBO>(mContext,new ArrayList<CreditCardItemBO>()) {
            @Override
            public RecyclerView.ViewHolder setViewHolder(ViewGroup parent, OnRecyclerItemClicked onRecyclerItemClicked) {
                final View view = LayoutInflater.from(mContext).inflate(R.layout.item_save_credit_card, parent, false);
                CreditCardViewHolder viewHolder = new CreditCardViewHolder(mContext, view,onRecyclerItemClicked);
                return viewHolder;
            }

            @Override
            public void onBindData(RecyclerView.ViewHolder holder, CreditCardItemBO val) {

            }

            @Override
            public OnRecyclerItemClicked onGetRecyclerItemClickListener() {
                return new OnRecyclerItemClicked() {
                    @Override
                    public void onItemClicked(View view, int position) {

                    }
                };
            }
        };

Answer 2

您可以在已声明为RecyclerView的活动中添加侦听器：

recyclerView.addOnItemTouchListener(new RecyclerTouchListener(this, recyclerView, 
   new RecyclerTouchListener.ClickListener() {
        @Override
        public void onClick(View view, int position) {
                //Handle the action
            }
        }

        @Override
        public void onLongClick(View view, int position) {

        }

    }));

Answer 3

我在Santa解决方案中实现了ViewHolder，如下所示：

public class EmployeeViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
    private TextView employeeName;
    private BaseRecyclerAdapter.OnRecyclerItemClicked mOnRecyclerItemClicked;

    public EmployeeViewHolder(View view, BaseRecyclerAdapter.OnRecyclerItemClicked onRecyclerItemClicked) {
        super(view);
        employeeName = (TextView) view.findViewById(R.id.employee_name);
        mOnRecyclerItemClicked = onRecyclerItemClicked;
        view.setOnClickListener(this);
    }

    @Override
    public void onClick(View view) {
        mOnRecyclerItemClicked.onItemClicked(view, getAdapterPosition());
    }

    public TextView getEmployeeName() {
        return employeeName;
    }
}

如果您需要上下文，请将其作为参数添加到构造函数中。

Answer 4

我创建了一个通用适配器，aar和源代码位于this url：

它易于使用：

RecyclerAdapter<Customer> mAdapter = new RecyclerAdapter(customerList, CustomerViewHolder.class);

添加附加侦听器（lambda示例）

RecyclerItemClickListener.affectOnItemClick(mRecycler, (position, view1) -> { 
 //action
});

请参阅网址链接更多详情

将Click侦听器添加到Generic RecyclerView Adapter

4 个答案: