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package com.example.myapplication;import android.os.Bundle;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import androidx.annotation.Nullable;import androidx.fragment.app.Fragment;import androidx.recyclerview.widget.LinearLayoutManager;import androidx.recyclerview.widget.RecyclerView;import com.alibaba.fastjson.JSONObject;import com.example.myapplication.adapter.CellListAdapter;import com.example.myapplication.entity.Article;import com.example.myapplication.entity.FirstPageVO;import okhttp3.*;import org.jetbrains.annotations.NotNull;import java.io.IOException;import java.util.ArrayList;/** * A simple {@link Fragment} subclass. * Use the {@link HomeFragment#newInstance} factory method to * create an instance of this fragment. */public class HomeFragment extends Fragment {
       public HomeFragment() {
           // Required empty public constructor    }    // TODO: Rename and change types and number of parameters    public static HomeFragment newInstance(String param1, String param2) {
           HomeFragment fragment = new HomeFragment();        Bundle args = new Bundle();        fragment.setArguments(args);        return fragment;    }    @Override    public void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);    }    static ArrayList
   
     data = new ArrayList<>();    // ListView listView;    static RecyclerView recyclerView;    private static int total = 100;    private static final int size = 5;    private static int pages = 10;    private static int page = 1;    CellListAdapter adapter = null;    @Override    public View onCreateView(LayoutInflater inflater, ViewGroup container,                             Bundle savedInstanceState) {
           return inflater.inflate(R.layout.home_fragment, container, false);        // ViewGroup pa = (ViewGroup) rootView.getParent();        // if(pa!=null) {
           //     pa.removeView(rootView);        // }    }    @Override    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
           super.onActivityCreated(savedInstanceState);        recyclerView = requireActivity().findViewById(R.id.recycler_view);        recyclerView.setLayoutManager(new LinearLayoutManager(requireActivity()));        adapter = new CellListAdapter(requireActivity(), data);        recyclerView.setAdapter(adapter);        recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
               protected boolean isSlideToBottom(RecyclerView recyclerView) {
                   if (recyclerView == null) return false;                if (recyclerView.computeVerticalScrollExtent() + recyclerView.computeVerticalScrollOffset() >= recyclerView.computeVerticalScrollRange()) {
                       return true;                }                return false;            }            @Override            public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
                   super.onScrollStateChanged(recyclerView, newState);            }            @Override            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                   super.onScrolled(recyclerView, dx, dy);                if(isSlideToBottom(recyclerView)) {
                       getFirstPageData();                }            }        });        // Article article = new Article();        // article.setTitle("6666");        // data.add(article);        // adapter = new CellListAdapter(getActivity(), data);        // listView.setAdapter(adapter);        getFirstPageData();    }    public void getFirstPageData() {
           //如果超过页数，就不继续请求数据了        if (data.size() >= total) {
               return;        }        OkHttpClient client = new OkHttpClient();        Request request = new Request.Builder()                .url("http://www.itshare.club/api/blogList?page=" + page + "&size=" + size)                .get().build();        Call call = client.newCall(request);        page++;        call.enqueue(new Callback() {
               @Override            public void onFailure(@NotNull Call call, @NotNull IOException e) {
               }            @Override            public void onResponse(@NotNull Call call, @NotNull Response response) throws IOException {
                   // System.out.println(("res"+ response.body().string() ));                FirstPageVO json = JSONObject.parseObject(response.body().string(), FirstPageVO.class);                FirstPageVO.Data d = json.getData();                total = d.getTotal();                pages = d.getPages();                data.addAll(d.getContentList());                getActivity().runOnUiThread(() -> {
                       Log.i("request .", "success" + page);                    // adapter.setList(data);                    adapter.notifyDataSetChanged();                });                ;            }        });    }    // @Override    // public void switchContent(Fragment from, Fragment to) {
       //     if (mContent != to) {
       //         mContent = to;    //         FragmentTransaction transaction = mFragmentMan.beginTransaction().setCustomAnimations(    //                 android.R.anim.fade_in, R.anim.slide_from_right);    //         if (!to.isAdded()) {    // 先判断是否被add过    //             transaction.hide(from).add(R.id.content_frame, to).commit(); // 隐藏当前的fragment，add下一个到Activity中    //         } else {
       //             transaction.hide(from).show(to).commit(); // 隐藏当前的fragment，显示下一个    //         }    //     }    // }    // public boolean isFragmentViewInit = false;    // private View lastView;    // @Override    // public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
       //     if (!isFragmentViewInit) {
       //         super.onViewCreated(view, savedInstanceState);    //    //         isFragmentViewInit = true;    //     }    //    // }    // @Override    // public View onCreateView(LayoutInflater inflater, ViewGroup container,    //                          Bundle savedInstanceState) {
       //     // Log.i(TAG, "onCreateView");    //    //     if (rootView == null) {
       //         rootView = inflater.inflate(R.layout.home_fragment, null);    //     }    //     // 缓存的rootView需要判断是否已经被加过parent，如果有parent需要从parent删除，要不然会发生这个rootview已经有parent的错误。    //     ViewGroup parent = (ViewGroup) rootView.getParent();    //     if (parent != null) {
       //         parent.removeView(rootView);    //     }    //     return rootView;    // }}
   

package com.example.myapplication.adapter;import android.content.Context;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.ImageView;import android.widget.TextView;import androidx.annotation.NonNull;import androidx.recyclerview.widget.RecyclerView;import com.bumptech.glide.Glide;import com.example.myapplication.R;import com.example.myapplication.entity.Article;import java.util.List;/** * @Author lyr * @create 2020/10/9 12:44 */public class CellListAdapter /*extends BaseAdapter */ extends RecyclerView.Adapter
   
    {
       List
    
      list;    LayoutInflater inflater;    public CellListAdapter(Context context, List
     
       list) {
           this.list = list;        inflater = LayoutInflater.from(context);    }    @NonNull    @Override    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
           inflater = LayoutInflater.from(parent.getContext());        View itemView  = inflater.inflate(R.layout.cell_item, parent,false);        ViewHolder viewHolder = new ViewHolder(itemView);        itemView.setOnClickListener(new View.OnClickListener() {
               @Override            public void onClick(View v) {
                   Log.i("hello","world");            }        });        return viewHolder;    }    @Override    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
           Article article = list.get(position);        holder.title.setText(article.getTitle());        holder.description.setText(article.getDescription());        Glide.with(holder.imageView.getContext())                .load(article.getFirstPicture())                .into(holder.imageView);    }    @Override    public int getItemCount() {
           return list.size();    }    // ViewHolder viewHolder;    class ViewHolder extends RecyclerView.ViewHolder{
           TextView title;        ImageView imageView;        TextView description;        public ViewHolder(@NonNull View itemView) {
               super(itemView);            title = itemView.findViewById(R.id.a_title);            imageView = itemView.findViewById(R.id.a_imageView);            description = itemView.findViewById(R.id.a_description);        }    }    //    // // @Override    // public View getView(int i, View convertView, ViewGroup viewGroup) {
       //     ViewHolder viewHolder;    //     // 当view为空时才加载布局，否则，直接修改内容    //     if (convertView == null) {
       //    //         // 通过inflate的方法加载布局，context需要在使用这个Adapter的Activity中传入。    //         convertView = inflater.inflate(R.layout.cell_item, null);    //         viewHolder = new ViewHolder();    //         viewHolder.title = convertView.findViewById(R.id.a_title);    //         viewHolder.imageView = convertView.findViewById(R.id.a_imageView);    //         viewHolder.description = convertView.findViewById(R.id.a_description);    //         //缓存 viewHolder 对象    //         convertView.setTag(viewHolder);    //    //         // 用setTag方法将处理好的viewHolder放入view中    //     }else {
       //         viewHolder = (ViewHolder)convertView.getTag();    //     }    //     Article article = this.list.get(i);    //    //     // imageView.setImageURI(Uri.parse("http://img.itshare.club/20200915222524.png"));    //     Glide.with(viewHolder.imageView.getContext())    //             .load(article.getFirstPicture())    //             .into(viewHolder.imageView);    //     viewHolder.title.setText(article.getTitle());    //     viewHolder.description.setText(article.getDescription());    //    //     // 从viewHolder中取出对应的对象，然后赋值给他们    //     // viewHolder.title.setText(list.get(i).getTitle());    //    //     // 将这个处理好的view返回    //     return convertView;    // }}
     
    
   

监听点击事件

@NonNull    @Override    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
           inflater = LayoutInflater.from(parent.getContext());        View itemView  = inflater.inflate(R.layout.cell_item, parent,false);        ViewHolder viewHolder = new ViewHolder(itemView);        itemView.setOnClickListener(new View.OnClickListener() {
               @Override            public void onClick(View v) {
                   Log.i("hello","world");            }        });        return viewHolder;    }

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