Question

我已将适配器设置为RecyclerView，我的列表大小为动态（2），我在适配器中发送。
但是当我调试我的代码时，onCreateViewHolder和onBindViewHolder从未调用过。

这是我设置适配器的代码。

mRecycler_Downloaded_List.setLayoutManager(new LinearLayoutManager(context, LinearLayoutManager.VERTICAL, true));
mRecycler_Downloaded_List.setHasFixedSize(true);
PurchaseListAdapterDownloded = new Recycler_purchase_list_adapter_downloaded(PurchaseList_Dummy.this, mList_downlaoded, false);
mRecycler_Downloaded_List.setAdapter(PurchaseListAdapterDownloded);

这是我的适配器代码，我得到并设置了值。

package com.structure.adapters;

import android.content.Context;
import android.graphics.Typeface;
import android.support.v4.widget.ContentLoadingProgressBar;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;

import com.bumptech.glide.Glide;
import com.bumptech.glide.load.engine.DiskCacheStrategy;
import com.structure.R;
import com.structure.beans.Response_GetVideoDetail;

import java.util.ArrayList;

/**
 * Created by root on 26/4/17.
 */
public class Recycler_purchase_list_adapter_downloaded extends RecyclerView.Adapter<Recycler_purchase_list_adapter_downloaded.ViewHolder> {
    Context context;
    Typeface face;
    ArrayList<Response_GetVideoDetail.ResponseBean.VideodetailsBean> mList;
    View view;
    boolean mIsDownloadedList;
    private LayoutInflater inflater;



    public Recycler_purchase_list_adapter_downloaded(Context context, ArrayList<Response_GetVideoDetail.ResponseBean.VideodetailsBean> mList, boolean mIsDownloadedList) {
        this.context = context;
        this.mList = mList;
        this. inflater = LayoutInflater.from(context);
        this.mIsDownloadedList = mIsDownloadedList;
        this.notifyDataSetChanged();
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        // View view  = LayoutInflater.from(context).inflate(R.layout.item_purchase_list, parent, false);

        View view = inflater.inflate(R.layout.item_purchase_list, parent, false);
        System.out.println("OnCreateView"+"onCreateViewHolder>>>>>>>>>>>>");
        ViewHolder holder = new ViewHolder(view);
        return holder;

    }


    @Override
    public void onBindViewHolder(ViewHolder holder, final int position) {
        holder.mtvName.setText(mList.get(position).getName());
        holder.mDesc.setText(mList.get(position).getDescription());
        holder.itemTime_tv.setText(mList.get(position).getDuration());
        Glide.with(context).load(/*APIs.IMGAE_BASE_URL +*/ mList.get(position).getPic())
                .diskCacheStrategy(DiskCacheStrategy.ALL)
                .dontTransform().dontAnimate()
                .error(R.drawable.demo_song).into(holder.mImg);

        System.out.println("OnCreateView"+"onBindViewHolder>>>>>>>>>>>>");



    }

    @Override
    public int getItemCount() {

        return mList.size();
    }


    class ViewHolder extends RecyclerView.ViewHolder {
        private TextView mtvName, itemTime_tv,mDesc;
        private ContentLoadingProgressBar mProgressBar;
        private RelativeLayout mLayout;
        // private ItemPurchaseListBinding binding;
        private ImageView mImg;

        public ViewHolder(View itemView) {
            super(itemView);
            mtvName = (TextView) itemView.findViewById(R.id.name_item);
            mDesc = (TextView) itemView.findViewById(R.id.desc);
            itemTime_tv = (TextView) itemView.findViewById(R.id.itemtime);
            mProgressBar = (ContentLoadingProgressBar) itemView.findViewById(R.id.seekBar);
            mImg = (ImageView) itemView.findViewById(R.id.img_songName);
            mLayout = (RelativeLayout) itemView.findViewById(R.id.rel_purchaselist);

            // itemTime_tv.setTypeface(face);
            //  mtvName.setTypeface(face);

            itemView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    //  getAdapterPosition();
                    //     registration.getImage(getAdapterPosition());
                }
            });
        }

    }




}

请帮我解决这个问题。我搜索了一切。如果有人有解决方案，请分享。我在设置适配器时调试了代码，列表大小为1。提前致谢。

Answer 1

如果您将适配器的创建与列表的setter分开，我认为操作适配器会更容易。

您可以从初始化开始：

mRecycler_Downloaded_List.setLayoutManager(new LinearLayoutManager(context, LinearLayoutManager.VERTICAL, true));
mRecycler_Downloaded_List.setHasFixedSize(true);
PurchaseListAdapterDownloded = new Recycler_purchase_list_adapter_downloaded(PurchaseList_Dummy.this,false);
mRecycler_Downloaded_List.setAdapter(PurchaseListAdapterDownloded);

然后，当它已经创建时，使用方法setList：

添加列表

private void setList(ArrayList<Response_GetVideoDetail.ResponseBean.VideodetailsBean> mList) {
       this.mList = mList;
       notifyDataSetChanged();
}

Answer 2

我认为您在mList_downlaoded列表中添加数据之前设置了适配器。因此，如果您在列表中添加数据之前初始化适配器，则只需调用 PurchaseListAdapterDownloded.notifyDataSetChanged（）;将数据添加到列表后。

RecyclerView适配器未设置

2 个答案: