Add infinite scroll to Internship Blog and News

app/src/main/java/app/insti/adapter/NewsAdapter.java

@@ -3,9 +3,11 @@ package app.insti.adapter;
 import android.content.Context;
 import android.support.annotation.NonNull;
 import android.support.v7.widget.RecyclerView;
+import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
+import android.widget.ProgressBar;
 import android.widget.TextView;
 
 import java.text.DateFormat;
@@ -18,9 +20,12 @@ import java.util.Locale;
 import app.insti.ItemClickListener;
 import app.insti.R;
 import app.insti.data.NewsArticle;
+import app.insti.fragment.NewsFragment;
 import ru.noties.markwon.Markwon;
 
-public class NewsAdapter extends RecyclerView.Adapter<NewsAdapter.ViewHolder> {
+public class NewsAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
+    private final int VIEW_ITEM = 1;
+    private final int VIEW_PROG = 0;
 
     private List<NewsArticle> newsArticles;
     private Context context;
@@ -31,46 +36,71 @@ public class NewsAdapter extends RecyclerView.Adapter<NewsAdapter.ViewHolder> {
         this.itemClickListener = itemClickListener;
     }
 
+    public List<NewsArticle> getNewsArticles() {
+        return newsArticles;
+    }
+
+    public void setNewsArticles(List<NewsArticle> newsArticles) {
+        this.newsArticles = newsArticles;
+    }
+
     @NonNull
     @Override
-    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+    public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
         context = parent.getContext();
-        LayoutInflater inflater = LayoutInflater.from(context);
-        View newsArticleView = inflater.inflate(R.layout.news_article_card, parent, false);
-
-        final NewsAdapter.ViewHolder articleViewHolder = new NewsAdapter.ViewHolder(newsArticleView);
-        newsArticleView.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                itemClickListener.onItemClick(v, articleViewHolder.getAdapterPosition());
-            }
-        });
-        return articleViewHolder;
+        if (viewType == VIEW_ITEM) {
+            LayoutInflater inflater = LayoutInflater.from(context);
+            View postView = inflater.inflate(R.layout.news_article_card, parent, false);
+
+            final NewsAdapter.ViewHolder postViewHolder = new NewsAdapter.ViewHolder(postView);
+            postView.setOnClickListener(new View.OnClickListener() {
+                @Override
+                public void onClick(View v) {
+                    itemClickListener.onItemClick(v, postViewHolder.getAdapterPosition());
+                }
+            });
+            return postViewHolder;
+        } else {
+            LayoutInflater inflater = LayoutInflater.from(context);
+            View loadView = inflater.inflate(R.layout.blog_load_item, parent, false);
+            final NewsAdapter.ViewHolder postViewHolder = new NewsAdapter.ViewHolder(loadView);
+            return new NewsAdapter.ProgressViewHolder(loadView);
+        }
     }
 
     @Override
-    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
-        NewsArticle article = newsArticles.get(position);
-        Markwon.setMarkdown(holder.articleTitle, article.getTitle());
-        holder.articleBody.setText(article.getBody().getBodyName());
-
-        Date publishedDate = article.getPublished();
-        Calendar calendar = Calendar.getInstance();
-        calendar.setTime(publishedDate);
-        DateFormat displayFormat;
-        if (calendar.get(Calendar.YEAR) == Calendar.getInstance().get(Calendar.YEAR)) {
-            displayFormat = new SimpleDateFormat("EEE, MMM d, HH:mm", Locale.US);
+    public void onBindViewHolder(@NonNull RecyclerView.ViewHolder recyclerHolder, int position) {
+        if (recyclerHolder instanceof ViewHolder) {
+            ViewHolder holder = (ViewHolder) recyclerHolder;
+            NewsArticle article = newsArticles.get(position);
+            Markwon.setMarkdown(holder.articleTitle, article.getTitle());
+            holder.articleBody.setText(article.getBody().getBodyName());
+
+            Date publishedDate = article.getPublished();
+            Calendar calendar = Calendar.getInstance();
+            calendar.setTime(publishedDate);
+            DateFormat displayFormat;
+            if (calendar.get(Calendar.YEAR) == Calendar.getInstance().get(Calendar.YEAR)) {
+                displayFormat = new SimpleDateFormat("EEE, MMM d, HH:mm", Locale.US);
+            } else {
+                displayFormat = new SimpleDateFormat("EEE, MMM d, ''yy, HH:mm", Locale.US);
+            }
+            holder.articlePublished.setText(displayFormat.format(publishedDate));
+
+            Markwon.setMarkdown(holder.articleContent, article.getContent());
         } else {
-            displayFormat = new SimpleDateFormat("EEE, MMM d, ''yy, HH:mm", Locale.US);
+            ((ProgressViewHolder) recyclerHolder).progressBar.setIndeterminate(true);
         }
-        holder.articlePublished.setText(displayFormat.format(publishedDate));
+    }
 
-        Markwon.setMarkdown(holder.articleContent, article.getContent());
+    @Override
+    public int getItemViewType(int position) {
+        return newsArticles.size() > position ? VIEW_ITEM : VIEW_PROG;
     }
 
     @Override
     public int getItemCount() {
-        return newsArticles.size();
+        return NewsFragment.showLoader ? (newsArticles.size() + 1) : newsArticles.size();
     }
 
     public class ViewHolder extends RecyclerView.ViewHolder {
@@ -88,4 +118,12 @@ public class NewsAdapter extends RecyclerView.Adapter<NewsAdapter.ViewHolder> {
             articleContent = (TextView) itemView.findViewById(R.id.article_content);
         }
     }
+
+    public static class ProgressViewHolder extends RecyclerView.ViewHolder {
+        public ProgressBar progressBar;
+        public ProgressViewHolder(View v) {
+            super(v);
+            progressBar = (ProgressBar)v.findViewById(R.id.blog_load_item);
+        }
+    }
 }

app/src/main/java/app/insti/adapter/PlacementBlogAdapter.java

@@ -25,6 +25,7 @@ import ru.noties.markwon.Markwon;
 public class PlacementBlogAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
     private final int VIEW_ITEM = 1;
     private final int VIEW_PROG = 0;
+
     public List<PlacementBlogPost> getPosts() {
         return posts;
     }
@@ -44,8 +45,8 @@ public class PlacementBlogAdapter extends RecyclerView.Adapter<RecyclerView.View
 
     @Override
     public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
-        if(viewType==VIEW_ITEM){
-            context = parent.getContext();
+        context = parent.getContext();
+        if (viewType == VIEW_ITEM) {
             LayoutInflater inflater = LayoutInflater.from(context);
             View postView = inflater.inflate(R.layout.blog_post_card, parent, false);
 
@@ -57,29 +58,29 @@ public class PlacementBlogAdapter extends RecyclerView.Adapter<RecyclerView.View
                 }
             });
             return postViewHolder;
-        }
-        else{
-            LayoutInflater inflater=LayoutInflater.from(context);
-            View loadView=inflater.inflate(R.layout.blog_load_item,parent,false);
+        } else {
+            LayoutInflater inflater = LayoutInflater.from(context);
+            View loadView = inflater.inflate(R.layout.blog_load_item, parent, false);
             final PlacementBlogAdapter.ViewHolder postViewHolder = new PlacementBlogAdapter.ViewHolder(loadView);
             return new PlacementBlogAdapter.ProgressViewHolder(loadView);
         }
     }
+
     @Override
     public int getItemViewType(int position) {
-        Log.d("position", String.valueOf(position));
-        return posts.size()> position ? VIEW_ITEM : VIEW_PROG;
+        return posts.size() > position ? VIEW_ITEM : VIEW_PROG;
     }
+
     @Override
     public int getItemCount() {
-        return PlacementBlogFragment.showLoader? (posts.size()+1):posts.size();
+        return PlacementBlogFragment.showLoader ? (posts.size() + 1) : posts.size();
     }
 
 
     @Override
-    public void onBindViewHolder(RecyclerView.ViewHolder recycleholder, int position) {
-        if(recycleholder instanceof ViewHolder){
-            ViewHolder holder=(ViewHolder)recycleholder;
+    public void onBindViewHolder(RecyclerView.ViewHolder recyclerHolder, int position) {
+        if (recyclerHolder instanceof ViewHolder) {
+            ViewHolder holder = (ViewHolder) recyclerHolder;
             PlacementBlogPost post = posts.get(position);
             Markwon.setMarkdown(holder.postTitle, post.getTitle());
 
@@ -95,9 +96,8 @@ public class PlacementBlogAdapter extends RecyclerView.Adapter<RecyclerView.View
             holder.postPublished.setText(displayFormat.format(publishedDate));
 
             Markwon.setMarkdown(holder.postContent, post.getContent());
-        }
-        else{
-            ((ProgressViewHolder)recycleholder).progressBar.setIndeterminate(true);
+        } else {
+            ((ProgressViewHolder) recyclerHolder).progressBar.setIndeterminate(true);
         }
     }
 
@@ -115,11 +115,13 @@ public class PlacementBlogAdapter extends RecyclerView.Adapter<RecyclerView.View
             postContent = (TextView) itemView.findViewById(R.id.post_content);
         }
     }
+
     public static class ProgressViewHolder extends RecyclerView.ViewHolder {
         public ProgressBar progressBar;
+
         public ProgressViewHolder(View v) {
             super(v);
-            progressBar = (ProgressBar)v.findViewById(R.id.blog_load_item);
+            progressBar = (ProgressBar) v.findViewById(R.id.blog_load_item);
         }
     }
 

app/src/main/java/app/insti/adapter/TrainingBlogAdapter.java

@@ -2,9 +2,11 @@ package app.insti.adapter;
 
 import android.content.Context;
 import android.support.v7.widget.RecyclerView;
+import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
+import android.widget.ProgressBar;
 import android.widget.TextView;
 
 import java.text.DateFormat;
@@ -17,9 +19,12 @@ import java.util.Locale;
 import app.insti.ItemClickListener;
 import app.insti.R;
 import app.insti.data.TrainingBlogPost;
+import app.insti.fragment.TrainingBlogFragment;
 import ru.noties.markwon.Markwon;
 
-public class TrainingBlogAdapter extends RecyclerView.Adapter<TrainingBlogAdapter.ViewHolder> {
+public class TrainingBlogAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
+    private final int VIEW_ITEM = 1;
+    private final int VIEW_PROG = 0;
 
     private List<TrainingBlogPost> posts;
     private Context context;
@@ -30,44 +35,69 @@ public class TrainingBlogAdapter extends RecyclerView.Adapter<TrainingBlogAdapte
         this.itemClickListener = itemClickListener;
     }
 
+    public List<TrainingBlogPost> getPosts() {
+        return posts;
+    }
+
+    public void setPosts(List<TrainingBlogPost> posts) {
+        this.posts = posts;
+    }
+
     @Override
-    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
         context = parent.getContext();
-        LayoutInflater inflater = LayoutInflater.from(context);
-        View postView = inflater.inflate(R.layout.blog_post_card, parent, false);
-
-        final TrainingBlogAdapter.ViewHolder postViewHolder = new TrainingBlogAdapter.ViewHolder(postView);
-        postView.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                itemClickListener.onItemClick(v, postViewHolder.getAdapterPosition());
-            }
-        });
-        return postViewHolder;
+        if (viewType == VIEW_ITEM) {
+            LayoutInflater inflater = LayoutInflater.from(context);
+            View postView = inflater.inflate(R.layout.blog_post_card, parent, false);
+
+            final TrainingBlogAdapter.ViewHolder postViewHolder = new TrainingBlogAdapter.ViewHolder(postView);
+            postView.setOnClickListener(new View.OnClickListener() {
+                @Override
+                public void onClick(View v) {
+                    itemClickListener.onItemClick(v, postViewHolder.getAdapterPosition());
+                }
+            });
+            return postViewHolder;
+        } else {
+            LayoutInflater inflater = LayoutInflater.from(context);
+            View loadView = inflater.inflate(R.layout.blog_load_item, parent, false);
+            final TrainingBlogAdapter.ViewHolder postViewHolder = new TrainingBlogAdapter.ViewHolder(loadView);
+            return new TrainingBlogAdapter.ProgressViewHolder(loadView);
+        }
     }
 
     @Override
-    public void onBindViewHolder(ViewHolder holder, int position) {
-        TrainingBlogPost post = posts.get(position);
-        Markwon.setMarkdown(holder.postTitle, post.getTitle());
-
-        Date publishedDate = post.getPublished();
-        Calendar calendar = Calendar.getInstance();
-        calendar.setTime(publishedDate);
-        DateFormat displayFormat;
-        if (calendar.get(Calendar.YEAR) == Calendar.getInstance().get(Calendar.YEAR)) {
-            displayFormat = new SimpleDateFormat("EEE, MMM d, HH:mm", Locale.US);
+    public void onBindViewHolder(RecyclerView.ViewHolder recyclerHolder, int position) {
+        if (recyclerHolder instanceof ViewHolder) {
+            ViewHolder holder = (ViewHolder) recyclerHolder;
+            TrainingBlogPost post = posts.get(position);
+            Markwon.setMarkdown(holder.postTitle, post.getTitle());
+
+            Date publishedDate = post.getPublished();
+            Calendar calendar = Calendar.getInstance();
+            calendar.setTime(publishedDate);
+            DateFormat displayFormat;
+            if (calendar.get(Calendar.YEAR) == Calendar.getInstance().get(Calendar.YEAR)) {
+                displayFormat = new SimpleDateFormat("EEE, MMM d, HH:mm", Locale.US);
+            } else {
+                displayFormat = new SimpleDateFormat("EEE, MMM d, ''yy, HH:mm", Locale.US);
+            }
+            holder.postPublished.setText(displayFormat.format(publishedDate));
+
+            Markwon.setMarkdown(holder.postContent, post.getContent());
         } else {
-            displayFormat = new SimpleDateFormat("EEE, MMM d, ''yy, HH:mm", Locale.US);
+            ((ProgressViewHolder) recyclerHolder).progressBar.setIndeterminate(true);
         }
-        holder.postPublished.setText(displayFormat.format(publishedDate));
+    }
 
-        Markwon.setMarkdown(holder.postContent, post.getContent());
+    @Override
+    public int getItemViewType(int position) {
+        return posts.size() > position ? VIEW_ITEM : VIEW_PROG;
     }
 
     @Override
     public int getItemCount() {
-        return posts.size();
+        return TrainingBlogFragment.showLoader ? (posts.size() + 1) : posts.size();
     }
 
     public class ViewHolder extends RecyclerView.ViewHolder {
@@ -83,4 +113,12 @@ public class TrainingBlogAdapter extends RecyclerView.Adapter<TrainingBlogAdapte
             postContent = (TextView) itemView.findViewById(R.id.post_content);
         }
     }
+
+    public static class ProgressViewHolder extends RecyclerView.ViewHolder {
+        public ProgressBar progressBar;
+        public ProgressViewHolder(View v) {
+            super(v);
+            progressBar = (ProgressBar)v.findViewById(R.id.blog_load_item);
+        }
+    }
 }

app/src/main/java/app/insti/api/RetrofitInterface.java

@@ -64,13 +64,13 @@ public interface RetrofitInterface {
     Call<List<PlacementBlogPost>> getPlacementBlogFeed(@Header("Cookie") String sessionID, @Query("from") int from,@Query("num") int num);
 
     @GET("training-blog")
-    Call<List<TrainingBlogPost>> getTrainingBlogFeed(@Header("Cookie") String sessionID);
+    Call<List<TrainingBlogPost>> getTrainingBlogFeed(@Header("Cookie") String sessionID, @Query("from") int from,@Query("num") int num);
 
     @GET("mess")
     Call<List<HostelMessMenu>> getInstituteMessMenu(@Header("Cookie") String sessionID);
 
     @GET("news")
-    Call<List<NewsArticle>> getNews(@Header("Cookie") String sessionID);
+    Call<List<NewsArticle>> getNews(@Header("Cookie") String sessionID, @Query("from") int from,@Query("num") int num);
 
     @GET("notifications")
     Call<List<Notification>> getNotifications(@Header("Cookie") String sessionID);

app/src/main/java/app/insti/fragment/NewsFragment.java

@@ -15,6 +15,7 @@ import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 
+import java.util.ArrayList;
 import java.util.List;
 
 import app.insti.ActivityBuffer;
@@ -39,6 +40,7 @@ public class NewsFragment extends BaseFragment {
     private SwipeRefreshLayout newsSwipeRefreshLayout;
     private AppDatabase appDatabase;
     private boolean freshNewsDisplayed = false;
+    public static boolean showLoader = true;
 
     public NewsFragment() {
         // Required empty public constructor
@@ -75,7 +77,7 @@ public class NewsFragment extends BaseFragment {
 
     private void updateNews() {
         RetrofitInterface retrofitInterface = ServiceGenerator.createService(RetrofitInterface.class);
-        retrofitInterface.getNews("sessionid=" + getArguments().getString(Constants.SESSION_ID)).enqueue(new Callback<List<NewsArticle>>() {
+        retrofitInterface.getNews("sessionid=" + getArguments().getString(Constants.SESSION_ID), 0, 20).enqueue(new Callback<List<NewsArticle>>() {
             @Override
             public void onResponse(Call<List<NewsArticle>> call, Response<List<NewsArticle>> response) {
                 if (response.isSuccessful()) {
@@ -116,6 +118,43 @@ public class NewsFragment extends BaseFragment {
                     newsRecyclerView = getActivity().findViewById(R.id.news_recycler_view);
                     newsRecyclerView.setAdapter(newsAdapter);
                     newsRecyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
+                    newsRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
+                        //                        multiple calls should not be made
+                        boolean loading = false;
+
+                        @Override
+                        public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
+                            if (dy > 0) {
+                                LinearLayoutManager layoutManager = (LinearLayoutManager) newsRecyclerView.getLayoutManager();
+                                if (((layoutManager.getChildCount() + layoutManager.findFirstVisibleItemPosition()) > (layoutManager.getItemCount() - 5)) && (!loading)) {
+                                    loading = true;
+                                    View v = getActivity().findViewById(R.id.training_feed_swipe_refresh_layout);
+                                    RetrofitInterface retrofitInterface = ServiceGenerator.createService(RetrofitInterface.class);
+                                    retrofitInterface.getNews("sessionid=" + getArguments().getString(Constants.SESSION_ID), layoutManager.getItemCount(), 10).enqueue(new Callback<List<NewsArticle>>() {
+                                        @Override
+                                        public void onResponse(Call<List<NewsArticle>> call, Response<List<NewsArticle>> response) {
+
+                                            loading = false;
+                                            List<NewsArticle> newsArticles = (ArrayList<NewsArticle>) newsAdapter.getNewsArticles();
+                                            newsArticles.addAll(response.body());
+                                            if (response.body().size() == 0) {
+                                                showLoader = false;
+                                            }
+                                            newsAdapter.setNewsArticles(newsArticles);
+                                            newsAdapter.notifyDataSetChanged();
+//                                            new updateDatabase().execute(blogPosts);
+                                        }
+
+                                        @Override
+                                        public void onFailure(Call<List<NewsArticle>> call, Throwable t) {
+                                            loading = false;
+                                        }
+                                    });
+                                }
+
+                            }
+                        }
+                    });
                 } catch (NullPointerException e) {
                     e.printStackTrace();
                 }

app/src/main/java/app/insti/fragment/PlacementBlogFragment.java

@@ -2,7 +2,6 @@ package app.insti.fragment;
 
 
 import android.app.Activity;
-import android.app.LauncherActivity;
 import android.content.Intent;
 import android.net.Uri;
 import android.os.AsyncTask;
@@ -12,13 +11,10 @@ import android.support.v4.widget.SwipeRefreshLayout;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
 import android.support.v7.widget.Toolbar;
-import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 
-import com.google.android.gms.common.util.ListUtils;
-
 import java.util.ArrayList;
 import java.util.List;
 
@@ -44,7 +40,7 @@ public class PlacementBlogFragment extends BaseFragment {
     private SwipeRefreshLayout feedSwipeRefreshLayout;
     private AppDatabase appDatabase;
     private boolean freshBlogDisplayed = false;
-    public static  boolean showLoader=true;
+    public static boolean showLoader = true;
 
 
     public PlacementBlogFragment() {
@@ -82,7 +78,7 @@ public class PlacementBlogFragment extends BaseFragment {
 
     private void updatePlacementFeed() {
         RetrofitInterface retrofitInterface = ServiceGenerator.createService(RetrofitInterface.class);
-        retrofitInterface.getPlacementBlogFeed("sessionid=" + getArguments().getString(Constants.SESSION_ID),0,20).enqueue(new Callback<List<PlacementBlogPost>>() {
+        retrofitInterface.getPlacementBlogFeed("sessionid=" + getArguments().getString(Constants.SESSION_ID), 0, 20).enqueue(new Callback<List<PlacementBlogPost>>() {
             @Override
             public void onResponse(Call<List<PlacementBlogPost>> call, Response<List<PlacementBlogPost>> response) {
                 if (response.isSuccessful()) {
@@ -122,25 +118,26 @@ public class PlacementBlogFragment extends BaseFragment {
                     placementFeedRecyclerView.setAdapter(placementBlogAdapter);
                     placementFeedRecyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
                     placementFeedRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
-//                        multiple calls should not be made
-                        boolean loading=false;
+                        //                        multiple calls should not be made
+                        boolean loading = false;
+
                         @Override
                         public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
-                            if(dy>0){
-                                LinearLayoutManager layoutManager= (LinearLayoutManager) placementFeedRecyclerView.getLayoutManager();
-                                if(((layoutManager.getChildCount()+layoutManager.findFirstVisibleItemPosition())>(layoutManager.getItemCount()-5))&&(!loading)){
-                                    loading=true;
-                                    View v=getActivity().findViewById(R.id.placement_feed_swipe_refresh_layout);
+                            if (dy > 0) {
+                                LinearLayoutManager layoutManager = (LinearLayoutManager) placementFeedRecyclerView.getLayoutManager();
+                                if (((layoutManager.getChildCount() + layoutManager.findFirstVisibleItemPosition()) > (layoutManager.getItemCount() - 5)) && (!loading)) {
+                                    loading = true;
+                                    View v = getActivity().findViewById(R.id.placement_feed_swipe_refresh_layout);
                                     RetrofitInterface retrofitInterface = ServiceGenerator.createService(RetrofitInterface.class);
-                                    retrofitInterface.getPlacementBlogFeed("sessionid=" +getArguments().getString(Constants.SESSION_ID),layoutManager.getItemCount(),10).enqueue(new Callback<List<PlacementBlogPost>>() {
+                                    retrofitInterface.getPlacementBlogFeed("sessionid=" + getArguments().getString(Constants.SESSION_ID), layoutManager.getItemCount(), 10).enqueue(new Callback<List<PlacementBlogPost>>() {
                                         @Override
                                         public void onResponse(Call<List<PlacementBlogPost>> call, Response<List<PlacementBlogPost>> response) {
 
-                                            loading=false;
-                                            List<PlacementBlogPost> blogPosts= (ArrayList<PlacementBlogPost>) placementBlogAdapter.getPosts();
+                                            loading = false;
+                                            List<PlacementBlogPost> blogPosts = (ArrayList<PlacementBlogPost>) placementBlogAdapter.getPosts();
                                             blogPosts.addAll(response.body());
-                                            if(response.body().size()==0){
-                                                showLoader=false;
+                                            if (response.body().size() == 0) {
+                                                showLoader = false;
                                             }
                                             placementBlogAdapter.setPosts(blogPosts);
                                             placementBlogAdapter.notifyDataSetChanged();
@@ -149,7 +146,7 @@ public class PlacementBlogFragment extends BaseFragment {
 
                                         @Override
                                         public void onFailure(Call<List<PlacementBlogPost>> call, Throwable t) {
-                                            loading=false;
+                                            loading = false;
                                         }
                                     });
                                 }

app/src/main/java/app/insti/fragment/TrainingBlogFragment.java

@@ -15,6 +15,7 @@ import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 
+import java.util.ArrayList;
 import java.util.List;
 
 import app.insti.ActivityBuffer;
@@ -39,6 +40,7 @@ public class TrainingBlogFragment extends BaseFragment {
     private SwipeRefreshLayout feedSwipeRefreshLayout;
     private AppDatabase appDatabase;
     private boolean freshBlogDisplayed = false;
+    public static boolean showLoader = true;
 
 
     public TrainingBlogFragment() {
@@ -76,7 +78,7 @@ public class TrainingBlogFragment extends BaseFragment {
 
     private void updateTrainingFeed() {
         RetrofitInterface retrofitInterface = ServiceGenerator.createService(RetrofitInterface.class);
-        retrofitInterface.getTrainingBlogFeed("sessionid=" + getArguments().getString(Constants.SESSION_ID)).enqueue(new Callback<List<TrainingBlogPost>>() {
+        retrofitInterface.getTrainingBlogFeed("sessionid=" + getArguments().getString(Constants.SESSION_ID), 0, 20).enqueue(new Callback<List<TrainingBlogPost>>() {
             @Override
             public void onResponse(Call<List<TrainingBlogPost>> call, Response<List<TrainingBlogPost>> response) {
                 if (response.isSuccessful()) {
@@ -115,6 +117,43 @@ public class TrainingBlogFragment extends BaseFragment {
                     trainingFeedRecyclerView = getActivity().findViewById(R.id.training_feed_recycler_view);
                     trainingFeedRecyclerView.setAdapter(trainingBlogAdapter);
                     trainingFeedRecyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
+                    trainingFeedRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
+                        //                        multiple calls should not be made
+                        boolean loading = false;
+
+                        @Override
+                        public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
+                            if (dy > 0) {
+                                LinearLayoutManager layoutManager = (LinearLayoutManager) trainingFeedRecyclerView.getLayoutManager();
+                                if (((layoutManager.getChildCount() + layoutManager.findFirstVisibleItemPosition()) > (layoutManager.getItemCount() - 5)) && (!loading)) {
+                                    loading = true;
+                                    View v = getActivity().findViewById(R.id.training_feed_swipe_refresh_layout);
+                                    RetrofitInterface retrofitInterface = ServiceGenerator.createService(RetrofitInterface.class);
+                                    retrofitInterface.getTrainingBlogFeed("sessionid=" + getArguments().getString(Constants.SESSION_ID), layoutManager.getItemCount(), 10).enqueue(new Callback<List<TrainingBlogPost>>() {
+                                        @Override
+                                        public void onResponse(Call<List<TrainingBlogPost>> call, Response<List<TrainingBlogPost>> response) {
+
+                                            loading = false;
+                                            List<TrainingBlogPost> blogPosts = (ArrayList<TrainingBlogPost>) trainingBlogAdapter.getPosts();
+                                            blogPosts.addAll(response.body());
+                                            if (response.body().size() == 0) {
+                                                showLoader = false;
+                                            }
+                                            trainingBlogAdapter.setPosts(blogPosts);
+                                            trainingBlogAdapter.notifyDataSetChanged();
+//                                            new updateDatabase().execute(blogPosts);
+                                        }
+
+                                        @Override
+                                        public void onFailure(Call<List<TrainingBlogPost>> call, Throwable t) {
+                                            loading = false;
+                                        }
+                                    });
+                                }
+
+                            }
+                        }
+                    });
                 } catch (NullPointerException e) {
                     e.printStackTrace();
                 }