Store timelines in db for faster start / switch between them.

app/src/main/java/app/fedilab/android/client/entities/QuickLoad.java

@@ -27,6 +27,7 @@ import java.util.List;
 import app.fedilab.android.activities.MainActivity;
 import app.fedilab.android.client.mastodon.entities.Status;
 import app.fedilab.android.exception.DBException;
+import app.fedilab.android.helper.MastodonHelper;
 import app.fedilab.android.helper.SpannableHelper;
 import app.fedilab.android.sqlite.Sqlite;
 
@@ -126,6 +127,7 @@ public class QuickLoad {
         quickLoad.slug = key;
         quickLoad.instance = MainActivity.currentInstance;
         quickLoad.user_id = MainActivity.currentUserID;
+        purge(quickLoad);
         try {
             insertOrUpdate(quickLoad);
         } catch (DBException e) {
@@ -180,6 +182,21 @@ public class QuickLoad {
         return null;
     }
 
+    /**
+     * Purge the list to avoid long list of Statuses in db
+     *
+     * @param quickLoad - QuickLoad to purge
+     */
+    private void purge(QuickLoad quickLoad) {
+        List<Status> statuses = quickLoad.statuses;
+        int position = quickLoad.position;
+        int limit = MastodonHelper.statusesPerCall(_mContext) + 10;
+        int startAt = Math.max(position - limit, 0);
+        int endAt = Math.min(position + limit, statuses.size());
+        quickLoad.position = position - startAt;
+        quickLoad.statuses = statuses.subList(startAt, endAt);
+    }
+
     /**
      * Update a QuickLoad in db
      *

app/src/main/java/app/fedilab/android/ui/fragment/timeline/FragmentMastodonTimeline.java

@@ -408,7 +408,7 @@ public class FragmentMastodonTimeline extends Fragment {
 
         new Thread(() -> {
             QuickLoad quickLoad = new QuickLoad(requireActivity()).getSavedValue(timelineType, ident);
-            if (quickLoad != null && quickLoad.statuses != null && quickLoad.statuses.size() > 0) {
+            if (direction == null && quickLoad != null && quickLoad.statuses != null && quickLoad.statuses.size() > 0) {
                 Statuses statuses = new Statuses();
                 statuses.statuses = quickLoad.statuses;
                 statuses.pagination = new Pagination();