خیلی ممنونم از راهنمایی هاتون 
من از کتابخانه ای که معرفی کردید استفاده کردم...

یک مشکلی هست هنوز ....
من در ادامه پست‌های page 1  نمی‌تونم پست‌های page2 و همچنین پست‌های بعدی رو داشته باشم
و وقتی به انتهای اسکرول میرستم محتوای page2 جایگزین page1 میشه و در ادامه اون نمیاد

 

package com.academyresane.infinittest;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity implements OnLoadMoreListener {
    private ProgressBar progressBar;
    private static final String TAG = "MainActivity";
    private RecyclerView recyclerView;
    private PostListAdapter postAdapter;
    private int page=0;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        page+=1;
        final StringRequest stringRequest = new StringRequest(Request.Method.GET,
                ApiService.BASE_URL+"wp-json/wp/v2/posts?_embed&page="+page+"&per_page=10",
                new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
//                        avi.hide();
                        try {
                            JSONArray jsonArray = new JSONArray(response);
                            List<Post> posts = new ArrayList<>();
                            for (int i = 0; i < jsonArray.length(); i++) {
                                JSONObject postItem = jsonArray.getJSONObject(i);
                                Post post = new Post();
                                post.setTitle(postItem.getJSONObject("title").getString("rendered"));
                                post.setContent(postItem.getJSONObject("excerpt").getString("rendered"));
                                post.setFullContent(postItem.getJSONObject("content").getString("rendered"));
                                post.setDate(postItem.getString("date"));
                                post.setCategory(postItem.getJSONObject("_embedded").getJSONArray("wp:term").getJSONArray(0).getJSONObject(0).getString("name"));
                                post.setAuthor(postItem.getJSONObject("_embedded").getJSONArray("author").getJSONObject(0).getString("name"));
                                JSONObject imageData = postItem.getJSONObject("_embedded");
                                if (imageData.has("wp:featuredmedia")){
                                    post.setImgURl(
                                            postItem.getJSONObject("_embedded")
                                                    .getJSONArray("wp:featuredmedia")
                                                    .getJSONObject(0)
                                                    .getJSONObject("media_details")
                                                    .getJSONObject("sizes")
                                                    .getJSONObject("thumbnail")
                                                    .getString("source_url")
                                    );
                                    post.setImageRulMain(
                                            postItem.getJSONObject("_embedded")
                                                    .getJSONArray("wp:featuredmedia")
                                                    .getJSONObject(0)
                                                    .getJSONObject("media_details")
                                                    .getJSONObject("sizes")
                                                    .getJSONObject("full")
                                                    .getString("source_url")
                                    );
                                }
                                post.setIdPost(postItem.getInt("id"));
                                posts.add(post);
                            }
                            RecyclerView recyclerView = findViewById(R.id.wrapperPostList);
                            PostListAdapter postListAdapter = new PostListAdapter(MainActivity.this);
                            postListAdapter.addPosts(posts);
                            recyclerView.setLayoutManager(new LinearLayoutManager(MainActivity.this, RecyclerView.VERTICAL, false));
                            recyclerView.setAdapter(postListAdapter);
                            InfiniteScrollProvider infiniteScrollProvider=new InfiniteScrollProvider();
                            infiniteScrollProvider.attach(recyclerView,MainActivity.this);
                            progressBar=(ProgressBar)findViewById(R.id.progress_bar);
                            Log.i(TAG, "onResponse: "+response);
                        } catch (JSONException e) {
                            e.printStackTrace();
                            Toast.makeText(MainActivity.this, "امکان اتصال وجود ندارد!", Toast.LENGTH_SHORT).show();
                            Log.i(TAG, "onCatch: "+e.toString());
                        }
                    }
                }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                Toast.makeText(MainActivity.this, "امکان اتصال وجود ندارد!", Toast.LENGTH_SHORT).show();
                Log.i(TAG, "onErrorResponseMessage: "+error.toString());
            }
        });
        final RequestQueue requestQueue = Volley.newRequestQueue(MainActivity.this);
        requestQueue.add(stringRequest);
    }
    @Override
    public void onLoadMore() {
        progressBar.setVisibility(View.VISIBLE);
        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                page+=1;
                final StringRequest requestNext = new StringRequest(Request.Method.GET,
                        ApiService.BASE_URL+"wp-json/wp/v2/posts?_embed&page="+page+"&per_page=10",
                        new Response.Listener<String>() {
                            @Override
                            public void onResponse(String response) {
//                        avi.hide();
                                try {
                                    JSONArray jsonArray = new JSONArray(response);
                                    List<Post> posts = new ArrayList<>();
                                    for (int i = 0; i < jsonArray.length(); i++) {
                                        JSONObject postItem = jsonArray.getJSONObject(i);
                                        Post post = new Post();
                                        post.setTitle(postItem.getJSONObject("title").getString("rendered"));
                                        post.setContent(postItem.getJSONObject("excerpt").getString("rendered"));
                                        post.setFullContent(postItem.getJSONObject("content").getString("rendered"));
                                        post.setDate(postItem.getString("date"));
                                        post.setCategory(postItem.getJSONObject("_embedded").getJSONArray("wp:term").getJSONArray(0).getJSONObject(0).getString("name"));
                                        post.setAuthor(postItem.getJSONObject("_embedded").getJSONArray("author").getJSONObject(0).getString("name"));
                                        JSONObject imageData = postItem.getJSONObject("_embedded");
                                        if (imageData.has("wp:featuredmedia")){
                                            post.setImgURl(
                                                    postItem.getJSONObject("_embedded")
                                                            .getJSONArray("wp:featuredmedia")
                                                            .getJSONObject(0)
                                                            .getJSONObject("media_details")
                                                            .getJSONObject("sizes")
                                                            .getJSONObject("thumbnail")
                                                            .getString("source_url")
                                            );
                                            post.setImageRulMain(
                                                    postItem.getJSONObject("_embedded")
                                                            .getJSONArray("wp:featuredmedia")
                                                            .getJSONObject(0)
                                                            .getJSONObject("media_details")
                                                            .getJSONObject("sizes")
                                                            .getJSONObject("full")
                                                            .getString("source_url")
                                            );
                                        }
                                        post.setIdPost(postItem.getInt("id"));
                                        posts.add(post);
                                    }
                                    RecyclerView recyclerView = findViewById(R.id.wrapperPostList);
                                    PostListAdapter postListAdapter = new PostListAdapter(MainActivity.this);
                                    postListAdapter.addPosts(posts);
                                    recyclerView.setLayoutManager(new LinearLayoutManager(MainActivity.this, RecyclerView.VERTICAL, false));
                                    recyclerView.setAdapter(postListAdapter);
                                    InfiniteScrollProvider infiniteScrollProvider=new InfiniteScrollProvider();
                                    infiniteScrollProvider.attach(recyclerView,MainActivity.this);
                                    progressBar=(ProgressBar)findViewById(R.id.progress_bar);
                                    progressBar=(ProgressBar)findViewById(R.id.progress_bar);
                                    Log.i(TAG, "onResponse: "+response);
                                } catch (JSONException e) {
                                    e.printStackTrace();
                                    Toast.makeText(MainActivity.this, "امکان اتصال وجود ندارد!", Toast.LENGTH_SHORT).show();
                                    Log.i(TAG, "onCatch: "+e.toString());
                                }
                            }
                        }, new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        Toast.makeText(MainActivity.this, "امکان اتصال وجود ندارد!", Toast.LENGTH_SHORT).show();
                        Log.i(TAG, "onErrorResponseMessage: "+error.toString());
                    }
                });
                final RequestQueue nextQueue = Volley.newRequestQueue(MainActivity.this);
                nextQueue.add(requestNext);
            }
        },1000);
    }
}

کد‌های آداپتر:

package com.academyresane.infinittest;
import android.content.Context;
import android.os.Build;
import android.text.Html;
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.annotation.RequiresApi;
import androidx.recyclerview.widget.RecyclerView;
import com.squareup.picasso.Picasso;
import java.util.ArrayList;
import java.util.List;
public class PostListAdapter extends RecyclerView.Adapter<PostListAdapter.PostListViewHolder> {
    private List<Post> posts = new ArrayList<>();
    private Context context;
    public PostListAdapter(Context context){
        this.context = context;
    }
    public void addPosts(List<Post> posts) {
        this.posts.addAll(posts);
        notifyDataSetChanged();
    }
    @NonNull
    @Override
    public PostListViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        return new PostListViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.item_post,parent,false));
    }
    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
    @Override
    public void onBindViewHolder(@NonNull PostListViewHolder holder, int position) {
        holder.bind(posts.get(position));
    }
    @Override
    public int getItemCount() {
        return posts.size();
    }
    public class PostListViewHolder extends RecyclerView.ViewHolder{
        private TextView titlePost;
        private TextView exceptPost;
        private ImageView thumbnailPost;
        public PostListViewHolder(@NonNull View itemView) {
            super(itemView);
            titlePost=itemView.findViewById(R.id.titleArticle);
            exceptPost=itemView.findViewById(R.id.description_post);
            thumbnailPost =itemView.findViewById(R.id.thumbnail_Post);
        }
        @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
        public void bind(final Post post){
            titlePost.setText(post.getTitle().toString());
            exceptPost.setText(Html.fromHtml(post.getContent()));
            thumbnailPost.setClipToOutline(true);
            if (post.getImgURl()!=null){
                Picasso.get().load(post.getImgURl().toString())
                        .placeholder(R.drawable.tiny_placeholder).into(thumbnailPost);
            }else {
                Picasso.get().load(R.drawable.tiny_placeholder).into(thumbnailPost);
            }
        }
    }
}

کد‌های پروژه