Fix some crashes

app/src/main/java/app/fedilab/android/mastodon/helper/MastodonHelper.java

@@ -130,8 +130,12 @@ public class MastodonHelper {
      * @return Pagination
      */
     public static Pagination getPagination(Headers headers) {
-        String link = headers.get("Link");
+
         Pagination pagination = new Pagination();
+        if (headers == null) {
+            return pagination;
+        }
+        String link = headers.get("Link");
         if (link != null) {
             Pattern patternMaxId = Pattern.compile("max_id=([0-9a-zA-Z]+).*");
             Matcher matcherMaxId = patternMaxId.matcher(link);

app/src/main/java/app/fedilab/android/mastodon/ui/drawer/StatusAdapter.java

@@ -2137,7 +2137,7 @@ public class StatusAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>
                     //We hide the button
                     status.isFetchMore = false;
                     String fromId;
-                    if (status.positionFetchMore == Status.PositionFetchMore.TOP) {
+                    if (status.positionFetchMore == Status.PositionFetchMore.TOP || holder.getBindingAdapterPosition() == 0) {
                         fromId = statusList.get(holder.getBindingAdapterPosition()).id;
                     } else {
                         fromId = statusList.get(holder.getBindingAdapterPosition() - 1).id;
@@ -2158,7 +2158,7 @@ public class StatusAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>
                         statusIdMin = status.id;
                     }
                 }
-                if (status.positionFetchMore == Status.PositionFetchMore.TOP) {
+                if (status.positionFetchMore == Status.PositionFetchMore.TOP || holder.getBindingAdapterPosition() == 0) {
                     statusIdMax = statusList.get(holder.getBindingAdapterPosition()).id;
                 } else {
                     statusIdMax = statusList.get(holder.getBindingAdapterPosition() - 1).id;
@@ -2470,6 +2470,9 @@ public class StatusAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>
     public List<Attachment> getPreloadItems(int position) {
         List<Attachment> attachments = new ArrayList<>();
         int max_size = statusList.size();
+        if (max_size == 0) {
+            return attachments;
+        }
         int siblings = 3;
         int from = Math.max((position - siblings), 0);
         if (from > max_size - 1) {
@@ -2646,7 +2649,7 @@ public class StatusAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>
                         status.isFetchMore = false;
                         notifyItemChanged(holder.getBindingAdapterPosition());
                         String fromId;
-                        if (status.positionFetchMore == Status.PositionFetchMore.TOP) {
+                        if (status.positionFetchMore == Status.PositionFetchMore.TOP || holder.getBindingAdapterPosition() == 0) {
                             fromId = statusList.get(holder.getBindingAdapterPosition()).id;
                         } else {
                             fromId = statusList.get(holder.getBindingAdapterPosition() - 1).id;
@@ -2664,7 +2667,7 @@ public class StatusAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>
                             minId = status.id;
                         }
                     }
-                    if (status.positionFetchMore == Status.PositionFetchMore.TOP) {
+                    if (status.positionFetchMore == Status.PositionFetchMore.TOP || holder.getBindingAdapterPosition() == 0) {
                         maxId = statusList.get(holder.getBindingAdapterPosition()).id;
                     } else {
                         maxId = statusList.get(holder.getBindingAdapterPosition() - 1).id;
@@ -2702,7 +2705,7 @@ public class StatusAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>
                     //We hide the button
                     status.isFetchMore = false;
                     String fromId;
-                    if (status.positionFetchMore == Status.PositionFetchMore.TOP) {
+                    if (status.positionFetchMore == Status.PositionFetchMore.TOP || holder.getBindingAdapterPosition() == 0) {
                         fromId = statusList.get(holder.getBindingAdapterPosition()).id;
                     } else {
                         fromId = statusList.get(holder.getBindingAdapterPosition() - 1).id;

app/src/main/java/app/fedilab/android/mastodon/ui/fragment/media/FragmentMediaProfile.java

@@ -96,7 +96,9 @@ public class FragmentMediaProfile extends Fragment {
                         accountsVM.getAccountStatuses(tempInstance, null, accountId, null, null, null, null, null, true, false, MastodonHelper.statusesPerCall(requireActivity()))
                                 .observe(getViewLifecycleOwner(), statuses -> initializeStatusesCommonView(statuses));
                     } else {
-                        Toasty.error(requireActivity(), getString(R.string.toast_fetch_error), Toasty.LENGTH_LONG).show();
+                        if (isAdded() && !requireActivity().isFinishing()) {
+                            Toasty.error(requireActivity(), getString(R.string.toast_fetch_error), Toasty.LENGTH_LONG).show();
+                        }
                     }
                 }
             });