Question

我想知道如何滚动以获取有关我的回收站视图的更多数据例如我使用wordpress api从我的网站获得10post 我希望在回收器中每次加载5个并滚动更多以获得5个帖子但是我不知道如何编码而不是看一下，给我一些正确的想法!!

News_list.java

/**
 * A simple {@link Fragment} subclass.
 */
public class News_List extends Fragment {
   private static final String URL = "https://chsknews.com/wp-json/wp/v2/posts/";
   private RecyclerView recyclerView;
   private RecyclerView.Adapter adapter;
   private List<News_Item> news_itemList;
   private SwipeRefreshLayout swipeRefreshLayout;
    public News_List() {
        // Required empty public constructor
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View rootView = inflater.inflate(R.layout.fragment_news__list, container, false);
    swipeRefreshLayout = (SwipeRefreshLayout) rootView.findViewById(R.id.swipe_refresh);
    recyclerView = (RecyclerView) rootView.findViewById(R.id.MRecyclerView);
    recyclerView.setHasFixedSize(true);
    recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
    news_itemList = new ArrayList<>();
    News_Loader();
    swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
        @Override
        public void onRefresh() {
            News_Loader();
            Toast.makeText(getContext(),"ដំណើរការជោគជ័យក្នុងការទាញយកពត៏មានចុងក្រោយ",Toast.LENGTH_SHORT).show();
            news_itemList.clear();
        }
    });
    return  rootView;
    }

    private void News_Loader() {
        final ProgressDialog progressDialog = new ProgressDialog(getContext());
        progressDialog.setMessage("Loading News");
        progressDialog.show();

        StringRequest stringRequest = new StringRequest(Request.Method.GET,
                URL,
                new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
                        progressDialog.dismiss();
                        try {
                            //JSONObject jsonObject = new JSONObject(response);
                            JSONArray array = new JSONArray(response);
                            for (int i = 0; i < array.length(); i++){
                                JSONObject o = array.getJSONObject(i);
                             //  Log.v("ID",o.getJSONObject("content").optString("rendered"));

                            news_itemList.add(new News_Item(
                                    o.getJSONObject("title").getString("rendered"),
                                    o.getString("date"),
                                    o.getJSONObject("better_featured_image").getString("source_url"),
                                    o.getString("date"),
                                    o.getJSONObject("content").getString("rendered"))
                                );
                               // news_itemList.add(news_item);
                            }
                            adapter = new CustomAdapter(news_itemList,getContext());
                            recyclerView.setAdapter(adapter);
                            if (swipeRefreshLayout.isRefreshing())
                            {
                            swipeRefreshLayout.setRefreshing(false);
                            }
                        } catch (JSONException e) {
                            e.printStackTrace();

                        }

                    }
                }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                progressDialog.dismiss();
                Toast.makeText(getContext(), error.getMessage(),Toast.LENGTH_LONG).show();
                if (swipeRefreshLayout.isRefreshing())
                {
                    swipeRefreshLayout.setRefreshing(false);
                }
            }
        });
        RequestQueue requestQueue = Volley.newRequestQueue(getContext());
        requestQueue.add(stringRequest);
    }

}

适配器类

public class CustomAdapter extends RecyclerView.Adapter<CustomAdapter.ViewHolder> {

    private List<News_Item> news_items;
    private Context context;

    public CustomAdapter(List<News_Item> news_items, Context context) {
        this.news_items = news_items;
        this.context = context;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View v = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.card_view,parent,false);
        return new ViewHolder(v);
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, final int position) {
    final News_Item  news_item = news_items.get(position);
    holder.title.setText(Html.fromHtml(news_item.getTitle()));
    holder.news_date.setText((news_item.getNews_date()));
        Picasso.with(context)
                .load(news_item.getImage_url())
                .fit()
                .into(holder.news_img);
    holder.news_img.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent intent = new Intent(context,News_Single_Post.class);
            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_SINGLE_TOP);
            intent.putExtra("source_url",news_items.get(position).getImage_url());
            intent.putExtra("rendered", news_items.get(position).getTitle());
            intent.putExtra("date",news_items.get(position).getNews_date());
            intent.putExtra("content",news_items.get(position).getNews_content());
            context.startActivity(intent);
        }
    });
    }

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

    public class ViewHolder extends RecyclerView.ViewHolder{

        public TextView title;
        public TextView news_date;
        public ImageView news_img;
        public ViewHolder(View itemView) {

            super(itemView);
            title = (TextView) itemView.findViewById(R.id.news_title);
            news_date = (TextView) itemView.findViewById(R.id.news_date);
            news_img = (ImageView) itemView.findViewById(R.id.news_image);
        }
    }
}

Answer 1

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On

RewriteBase /

RewriteCond %{QUERY_STRING} ^(?:[^&]*&)*arttyp=Indianerflöten
RewriteRule ^/?shop\.php$ /basiskategorie/indianerfloeten-high-spirits [R=301,L]

# RewriteRule  ^shop.php?arttyp=Indianerflöten /basiskategorie/indianerfloeten-high-spirits [R=301,L]
# Redirect 301 /shop.php /produkte
# Redirect permanent  /shop.php?arttyp=Indianerflöten /basiskategorie/indianerfloeten-high-spirits
# RewriteRule  ^shop.php?arttyp=Indianerflöten$ /basiskategorie/indianerfloeten-high-spirits [R=301,NC,L]
# RewriteRule  ^shop.php?arttyp=Indianerflöten /basiskategorie/indianerfloeten-high-spirits [R=301,NC,L]
# RewriteRule  ^shop.php?arttyp=Instrumente\ für\ Klangtherapie$ /basiskategorie/monochorde [R=301,L]
# Redirect permanent "shop.php?arttyp=Instrumente für Klangtherapie" /basiskategorie/monochorde


RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]


</IfModule>

别忘了添加

private boolean loading = true;
int pastVisiblesItems, visibleItemCount, totalItemCount;

mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() 
{
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) 
{
if(dy > 0) //check for scroll down
{
 visibleItemCount = mLayoutManager.getChildCount();
 totalItemCount = mLayoutManager.getItemCount();
 pastVisiblesItems = mLayoutManager.findFirstVisibleItemPosition();

        if (loading) 
        {
            if ( (visibleItemCount + pastVisiblesItems) >= totalItemCount) 
            {
                loading = false;
                Log.v("...", "Last Item Wow !");
                //Do pagination.. i.e. fetch new data
            }
        }
    }
}
 });

如何滚动以在Recycler View上加载更多数据？

1 个答案: