Fix broken infinite scrolling

Check if the item being displayed is the progress bar in getItemId

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

@@ -111,8 +111,11 @@ public class NewsAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> i
 
     @Override
     public long getItemId(int position) {
+        if (position < newsArticles.size()) {
             return newsArticles.get(position).getArticleID().hashCode();
         }
+        return -1;
+    }
 
     @Override
     public int getItemCount() {

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

@@ -103,8 +103,11 @@ public class PlacementBlogAdapter extends RecyclerView.Adapter<RecyclerView.View
 
     @Override
     public long getItemId(int position) {
+        if (position < posts.size()) {
             return posts.get(position).getPostID().hashCode();
         }
+        return -1;
+    }
 
     public static class ProgressViewHolder extends RecyclerView.ViewHolder {
         public ProgressBar progressBar;

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

@@ -99,8 +99,11 @@ public class TrainingBlogAdapter extends RecyclerView.Adapter<RecyclerView.ViewH
 
     @Override
     public long getItemId(int position) {
+        if (position < posts.size()) {
             return posts.get(position).getPostID().hashCode();
         }
+        return -1;
+    }
 
     @Override
     public int getItemCount() {