Re-does commit 340a6fad29 because those changes were stomped by merging in commit b499e51437.

app/src/main/java/com/keylesspalace/tusky/fragment/NotificationsFragment.java

@@ -40,7 +40,6 @@ import com.keylesspalace.tusky.adapter.NotificationsAdapter;
 import com.keylesspalace.tusky.R;
 import com.keylesspalace.tusky.entity.Notification;
 import com.keylesspalace.tusky.entity.Status;
-import com.keylesspalace.tusky.interfaces.AdapterItemRemover;
 import com.keylesspalace.tusky.interfaces.StatusActionListener;
 import com.keylesspalace.tusky.receiver.TimelineReceiver;
 import com.keylesspalace.tusky.util.HttpHeaderLink;
@@ -51,8 +50,8 @@ import com.keylesspalace.tusky.view.EndlessOnScrollListener;
 import com.keylesspalace.tusky.viewdata.NotificationViewData;
 import com.keylesspalace.tusky.viewdata.StatusViewData;
 
-import java.util.HashSet;
 import java.util.Iterator;
+import java.util.LinkedHashSet;
 import java.util.List;
 
 import retrofit2.Call;
@@ -440,8 +439,8 @@ public class NotificationsFragment extends SFragment implements
             topId = uptoId;
         }
         if (notifications.isEmpty()) {
-            // This construction removes duplicates.
-            notifications.addAll(new HashSet<>(newNotifications));
+            // This construction removes duplicates while preserving order.
+            notifications.addAll(new LinkedHashSet<>(newNotifications));
         } else {
             int index = notifications.indexOf(newNotifications.get(newNotifications.size() - 1));
             for (int i = 0; i < index; i++) {

app/src/main/java/com/keylesspalace/tusky/fragment/TimelineFragment.java

@@ -43,14 +43,15 @@ import com.keylesspalace.tusky.interfaces.StatusActionListener;
 import com.keylesspalace.tusky.network.MastodonApi;
 import com.keylesspalace.tusky.receiver.TimelineReceiver;
 import com.keylesspalace.tusky.util.HttpHeaderLink;
+import com.keylesspalace.tusky.util.ListUtils;
 import com.keylesspalace.tusky.util.PairedList;
 import com.keylesspalace.tusky.util.ThemeUtils;
 import com.keylesspalace.tusky.util.ViewDataUtils;
 import com.keylesspalace.tusky.view.EndlessOnScrollListener;
 import com.keylesspalace.tusky.viewdata.StatusViewData;
 
-import java.util.HashSet;
 import java.util.Iterator;
+import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Locale;
 
@@ -589,7 +590,7 @@ public class TimelineFragment extends SFragment implements
 
     private void updateStatuses(List<Status> newStatuses, @Nullable String fromId,
                                 @Nullable String toId) {
-        if (newStatuses == null || newStatuses.isEmpty()) {
+        if (ListUtils.isEmpty(newStatuses)) {
             return;
         }
         if (fromId != null) {
@@ -599,8 +600,8 @@ public class TimelineFragment extends SFragment implements
             upToId = toId;
         }
         if (statuses.isEmpty()) {
-            // This construction removes duplicates.
-            statuses.addAll(new HashSet<>(newStatuses));
+            // This construction removes duplicates while preserving order.
+            statuses.addAll(new LinkedHashSet<>(newStatuses));
         } else {
             Status lastOfNew = newStatuses.get(newStatuses.size() - 1);
             int index = statuses.indexOf(lastOfNew);