.

app/src/main/java/com/app/simplitend/articles/ArticlesActivity.java

@@ -71,6 +71,7 @@ public class ArticlesActivity extends AppCompatActivity
         articlesAdapter = new ArticlesAdapter(this);
         binding.articlesRv.setAdapter(articlesAdapter);
 
+        // pagination
         binding.articlesRv.addOnScrollListener(new RecyclerView.OnScrollListener() {
             @Override
             public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {

app/src/main/java/com/app/simplitend/patient_dashboard/NotificationsActivity.java

@@ -21,13 +21,13 @@ import com.app.simplitend.databinding.NotificationViewholderBinding;
 import com.app.simplitend.welcome.welcomepatient.mvvm.models.CallResponse;
 
 import java.util.ArrayList;
+import java.util.List;
 
 import retrofit2.Call;
 import retrofit2.Callback;
 import retrofit2.Response;
 import retrofit2.http.GET;
 import retrofit2.http.Header;
-import retrofit2.http.Query;
 import retrofit2.http.Url;
 
 public class NotificationsActivity extends AppCompatActivity implements Callback<CallResponse<ArrayList<NotificationsActivity.Notification>>> {
@@ -36,6 +36,12 @@ public class NotificationsActivity extends AppCompatActivity implements Callback
 
     protected NotificationsApiService apiService;
 
+    private static final String NOTIFICATION_BASE_URL = "api/get-notifications";
+
+    private static final int PER_PAGE_COUNT = 10;
+
+    private int page_no;
+
     protected String user_id;
     public static final String USER_ID = "user_id";
 
@@ -45,6 +51,8 @@ public class NotificationsActivity extends AppCompatActivity implements Callback
     protected boolean isCaregiver;
 
     private NotificationsAdapter notificationsAdapter;
+    private boolean isLoadingNotifications;
+    private boolean lastPageHit;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -62,25 +70,65 @@ public class NotificationsActivity extends AppCompatActivity implements Callback
         notificationsAdapter = new NotificationsAdapter();
         binding.notificationRv.setAdapter(notificationsAdapter);
 
+        // pagination
+        binding.notificationRv.addOnScrollListener(new RecyclerView.OnScrollListener() {
+            @Override
+            public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {
+                super.onScrolled(recyclerView, dx, dy);
+                LinearLayoutManager layoutManager = (LinearLayoutManager) recyclerView.getLayoutManager();
+                int visibleItemCount = layoutManager.getChildCount();
+                int totalItemCount = layoutManager.getItemCount();
+                int firstVisibleItemPosition = layoutManager.findFirstVisibleItemPosition();
+
+                if (!isLoadingNotifications && !lastPageHit) {
+                    if ((visibleItemCount + firstVisibleItemPosition) >= (totalItemCount)
+                            && firstVisibleItemPosition >= 0) {
+                        page_no++; // loading next page
+                        loadNotifications(true);
+                    }
+                }
+            }
+        });
+
+        page_no = 1; // loading first page
+        loadNotifications(false);
+
+    }
+
+    private void loadNotifications(boolean show_bottom_progress) {
         if (user_id != null){
-            binding.progress.setVisibility(View.VISIBLE);
+
+            if (show_bottom_progress){
+                binding.pageProgress.setVisibility(View.VISIBLE);
+            }else{
+                binding.progress.setVisibility(View.VISIBLE);
+            }
+            isLoadingNotifications = true;
+
             if (isCaregiver){
-                apiService.getNotifications("api/get-notifications?caregiverId=" + user_id,
+
+                String url = NOTIFICATION_BASE_URL + "?caregiverId=" + user_id;
+                url += "&per_page=" + PER_PAGE_COUNT + "&page=" + page_no;
+                apiService.getNotifications(url,
                         "Bearer " + token).enqueue(this);
             }else{
-                apiService.getNotifications("api/get-notifications?patientId=" + user_id,
+
+                String url = NOTIFICATION_BASE_URL + "?patientId=" + user_id;
+                url += "&per_page=" + PER_PAGE_COUNT + "&page=" + page_no;
+                apiService.getNotifications(url,
                         "Bearer " + token).enqueue(this);
             }
         }else{
             binding.errorMsg.setText(R.string.couldn_t_load_notifications);
             binding.errorView.setVisibility(View.VISIBLE);
         }
-
     }
 
     @Override
     public void onResponse(Call<CallResponse<ArrayList<Notification>>> call, Response<CallResponse<ArrayList<Notification>>> response) {
         binding.progress.setVisibility(View.GONE);
+        binding.pageProgress.setVisibility(View.GONE);
+
         if (response.body() != null){
             if (response.code() != 200){
                 binding.errorMsg.setText(response.body().message);
@@ -88,15 +136,28 @@ public class NotificationsActivity extends AppCompatActivity implements Callback
                 return;
             }
 
-            if (response.body().result == null || response.body().result.isEmpty()){
-                binding.errorMsg.setText(R.string.no_notifications);
+            if (response.body().result == null){
+                binding.errorMsg.setText(R.string.couldn_t_load_notifications);
                 binding.errorView.setVisibility(View.VISIBLE);
                 return;
             }
 
             binding.errorView.setVisibility(View.GONE);
             binding.notificationRv.setVisibility(View.VISIBLE);
-            notificationsAdapter.submitList(response.body().result);
+
+            isLoadingNotifications = false;
+            lastPageHit = response.body().result.size() < 10; // no more data to load
+
+            List<Notification> current_list = notificationsAdapter.getCurrentList();
+            ArrayList<Notification> total_list = new ArrayList<>(current_list);
+            total_list.addAll(response.body().result);
+
+            if (total_list.isEmpty()){
+                binding.errorMsg.setText(R.string.no_notifications);
+                binding.errorView.setVisibility(View.VISIBLE);
+            }else{
+                notificationsAdapter.submitList(total_list);
+            }
 
         }else{
             binding.errorMsg.setText(R.string.couldn_t_load_notifications);
@@ -107,6 +168,7 @@ public class NotificationsActivity extends AppCompatActivity implements Callback
     @Override
     public void onFailure(Call<CallResponse<ArrayList<Notification>>> call, Throwable t) {
         binding.progress.setVisibility(View.GONE);
+        binding.pageProgress.setVisibility(View.GONE);
         binding.errorMsg.setText(R.string.couldn_t_load_notifications);
         binding.errorView.setVisibility(View.VISIBLE);
     }

app/src/main/res/layout/activity_notifications.xml

@@ -75,11 +75,31 @@
 
     </LinearLayout>
 
-    <androidx.recyclerview.widget.RecyclerView
-        android:id="@+id/notification_rv"
-        android:visibility="gone"
+    <RelativeLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:layout_marginTop="15dp"/>
+        >
+
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/notification_rv"
+            android:visibility="gone"
+            android:layout_above="@id/page_progress"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_marginTop="15dp"/>
+
+        <ProgressBar
+            android:id="@+id/page_progress"
+            android:layout_width="30dp"
+            android:layout_height="30dp"
+            android:indeterminateTint="@android:color/darker_gray"
+            android:indeterminate="true"
+            android:layout_alignParentBottom="true"
+            android:layout_centerHorizontal="true"
+            android:layout_marginVertical="5dp"
+            android:visibility="gone"
+            />
+
+    </RelativeLayout>
 
 </LinearLayout>