RecyclerView OnClick 不起作用 [英] RecyclerView OnClick not working

问题描述

我在片段中创建了一个水平回收视图.现在，当我点击任何项目时，我没有看到点击监听器在工作.这是我的 Adapter 类代码:

I have made a horizontal recyclerview inside a fragment. Now when I click on any item I don't see the on click listener working. Here is my code for the Adapter class:

public class FeaturedProductsAdapter  extends RecyclerView.Adapter<FeaturedProductsAdapter.CustomViewHolder> {
private List<FeaturedProductInfo> feedItemList;
private Context mContext;

public FeaturedProductsAdapter(Context context, List<FeaturedProductInfo> feedItemList) {
    this.feedItemList = feedItemList;
    this.mContext = context;
}
public class CustomViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
    protected ImageView imageView;
    protected TextView textView,priceView;
    private Context context;


    public CustomViewHolder(View view,Context context) {

        super(view);
        this.context=context;
        this.imageView = (ImageView) view.findViewById(R.id.thumbnail);
        this.textView = (TextView) view.findViewById(R.id.prodTitle);
        this.priceView = (TextView) view.findViewById(R.id.prodPrice);
        view.setOnClickListener(this);

    }

    @Override
    public void onClick(View view) {

        int position = getLayoutPosition(); // gets item position
        Log.e("Check", position + "");
        FeaturedProductInfo user = feedItemList.get(position);//[position];
        // We can access the data within the views
        Intent intent = new Intent(context, ProductDescription.class);
        intent.putExtra("id", user.getId());
        mContext.startActivity(intent);


    }

}

@Override
public CustomViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
    View view = LayoutInflater.from(mContext).inflate(R.layout.featured_product_list_item_card, null);
    Context context = viewGroup.getContext();

    CustomViewHolder viewHolder = new CustomViewHolder(view,context);

    return viewHolder;
}

@Override
public void onBindViewHolder(CustomViewHolder customViewHolder, int i) {
    FeaturedProductInfo feedItem = feedItemList.get(i);

    //Download image using picasso library
    if(!feedItem.getUrl().contains("."))
    {
        feedItem.setUrl("nothing");
    }
    Picasso.with(mContext).load(feedItem.getUrl())
            .error(R.drawable.unavailable)
            .placeholder(R.drawable.unavailable)
            .resize(110,110)
            .into(customViewHolder.imageView);

    //Setting text view title
    customViewHolder.textView.setText(feedItem.getTitle());
    customViewHolder.priceView.setText(feedItem.getPrice());
    //Log.e("Featured: ","SET");
}

@Override
public int getItemCount() {
    return (null != feedItemList ? feedItemList.size() : 0);
}

}

我想我不知道如何正确使用视图持有者.虽然我在另一个活动中为 recyclerView 使用了相同的代码，但它的工作原理很迷人.

I think I am not getting how to use the view holder properly. While I have used the same code for recyclerView in another activities and it works like charm.

推荐答案

1.ViewHolder

RecyclerView 与 ListView 具有方法 setOnItemClickListener() 不同，没有将点击处理程序附加到项目的特殊规定.为了达到类似的效果，我们可以在适配器内的 ViewHolder 中附加点击事件:

RecyclerView does not have special provisions for attaching click handlers to items unlike ListView which has the method setOnItemClickListener(). To achieve a similar effect, we can attach click events within the ViewHolder within our adapter:

public class ContactsAdapter extends RecyclerView.Adapter<ContactsAdapter.ViewHolder> {
    // ...

    // Used to cache the views within the item layout for fast access
    public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
        public TextView tvName;
        public TextView tvHometown;
        private Context context;

        public ViewHolder(Context context, View itemView) {
            super(itemView);
            this.tvName = (TextView) itemView.findViewById(R.id.tvName);
            this.tvHometown = (TextView) itemView.findViewById(R.id.tvHometown);
            // Store the context
            this.context = context;
            // Attach a click listener to the entire row view
            itemView.setOnClickListener(this);
        }

        // Handles the row being being clicked
        @Override
        public void onClick(View view) {
            int position = getLayoutPosition(); // gets item position
            User user = users.get(position);
            // We can access the data within the views
            Toast.makeText(context, tvName.getText(), Toast.LENGTH_SHORT).show();
        }
    }

    // ...
}

另一种方式是我的首选方式..但这也是一个很好的方法.

Another way is my preferred way.. but this is also a fine way to go about it.

我的 onBindViewHolder

My onBindViewHolder

@Override
    public void onBindViewHolder(CategoryViewHolder holder, int position) {
        Category category = mCategories.get(position);

        holder.tvTitle.setText(category.getTitle());
        holder.tvDescription.setText(category.getDescription());

        holder.rlContainer.setOnClickListener(mClickListener);
        holder.rlContainer.setTag(holder);
    }

我的类级别(View.OnClickListner的Adapter对象)

My class level (Adapter object of View.OnClickListner)

View.OnClickListener mClickListener = new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            CategoryViewHolder holder = (CategoryViewHolder) view.getTag();
            int position = holder.getAdapterPosition();

            startAppointmentBookingFor(mCategories.get(position));
        }
    };

因此基本上将侦听器附加到您的持有人中的任何视图(我尝试仅将其放在容器上)，然后在 onclick 上将其提取出来并处理位置等.

so basically attach the listener to any view in your holder (I try to put it on container only), then extract it out on the onclick and handle positions etc.

这篇关于RecyclerView OnClick 不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！