Fixes, improvements

app/src/main/java/eu/faircode/email/ActivityView.java

@@ -743,6 +743,7 @@ public class ActivityView extends ActivityBilling implements FragmentManager.OnB
                 try {
                     db.beginTransaction();
 
+                    if (!EntityFolder.OUTBOX.equals(message.folderType)) {
                         if (!message.content)
                             EntityOperation.queue(db, message, EntityOperation.BODY);
 
@@ -750,6 +751,7 @@ public class ActivityView extends ActivityBilling implements FragmentManager.OnB
                             db.message().setMessageUiSeen(message.id, true);
                             EntityOperation.queue(db, message, EntityOperation.SEEN, true);
                         }
+                    }
 
                     db.setTransactionSuccessful();
                 } finally {

app/src/main/java/eu/faircode/email/AdapterMessage.java

@@ -263,8 +263,10 @@ public class AdapterMessage extends PagedListAdapter<TupleMessageEx, AdapterMess
             final TupleMessageEx message = getItem(pos);
 
             PopupMenu popupMenu = new PopupMenu(context, itemView);
+            if (!EntityFolder.OUTBOX.equals(message.folderType)) {
                 popupMenu.getMenu().add(Menu.NONE, action_flag, 1, message.ui_flagged ? R.string.title_unflag : R.string.title_flag);
                 popupMenu.getMenu().add(Menu.NONE, action_seen, 2, message.ui_seen ? R.string.title_unseen : R.string.title_seen);
+            }
             if (EntityFolder.TRASH.equals(message.folderType))
                 popupMenu.getMenu().add(Menu.NONE, action_delete, 3, R.string.title_delete);
             popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
@@ -355,6 +357,7 @@ public class AdapterMessage extends PagedListAdapter<TupleMessageEx, AdapterMess
                 }
             });
 
+            if (popupMenu.getMenu().hasVisibleItems())
                 popupMenu.show();
 
             return true;

app/src/main/java/eu/faircode/email/BoundaryCallbackMessages.java

@@ -55,7 +55,7 @@ public class BoundaryCallbackMessages extends PagedList.BoundaryCallback<TupleMe
     private long fid;
     private String search;
     private int pageSize;
-    private Handler mainHandler;
+    private Handler handler;
     private IBoundaryCallbackMessages intf;
     private ExecutorService executor = Executors.newSingleThreadExecutor(Helper.backgroundThreadFactory);
 
@@ -65,6 +65,7 @@ public class BoundaryCallbackMessages extends PagedList.BoundaryCallback<TupleMe
     private int index;
     private boolean searching = false;
     private int loaded = 0;
+    private boolean destroyed = false;
 
     interface IBoundaryCallbackMessages {
         void onLoading();
@@ -79,13 +80,14 @@ public class BoundaryCallbackMessages extends PagedList.BoundaryCallback<TupleMe
         this.fid = folder;
         this.search = search;
         this.pageSize = pageSize;
-        this.mainHandler = new Handler(_context.getMainLooper());
+        this.handler = new Handler();
         this.intf = intf;
 
         owner.getLifecycle().addObserver(new GenericLifecycleObserver() {
             @Override
             public void onStateChanged(LifecycleOwner source, Lifecycle.Event event) {
-                if (event == Lifecycle.Event.ON_DESTROY)
+                if (event == Lifecycle.Event.ON_DESTROY) {
+                    destroyed = true;
                     executor.submit(new Runnable() {
                         @Override
                         public void run() {
@@ -105,6 +107,7 @@ public class BoundaryCallbackMessages extends PagedList.BoundaryCallback<TupleMe
                         }
                     });
                 }
+            }
         });
     }
 
@@ -134,16 +137,18 @@ public class BoundaryCallbackMessages extends PagedList.BoundaryCallback<TupleMe
             public void run() {
                 try {
                     searching = true;
-
-                    mainHandler.post(new Runnable() {
+                    handler.post(new Runnable() {
                         @Override
                         public void run() {
+                            if (!destroyed)
                                 intf.onLoading();
                         }
                     });
 
                     DB db = DB.getInstance(context);
                     EntityFolder folder = db.folder().getFolder(fid);
+                    if (folder.account == null) // outbox
+                        return;
                     EntityAccount account = db.account().getAccount(folder.account);
 
                     if (imessages == null) {
@@ -221,24 +226,25 @@ public class BoundaryCallbackMessages extends PagedList.BoundaryCallback<TupleMe
                         }
                     }
 
-                    mainHandler.post(new Runnable() {
-                        @Override
-                        public void run() {
-                            intf.onLoaded();
-                        }
-                    });
-
                     Log.i(Helper.TAG, "Boundary done");
                 } catch (final Throwable ex) {
                     Log.e(Helper.TAG, "Boundary " + ex + "\n" + Log.getStackTraceString(ex));
-                    mainHandler.post(new Runnable() {
+                    handler.post(new Runnable() {
                         @Override
                         public void run() {
+                            if (!destroyed)
                                 intf.onError(context, ex);
                         }
                     });
                 } finally {
                     searching = false;
+                    handler.post(new Runnable() {
+                        @Override
+                        public void run() {
+                            if (!destroyed)
+                                intf.onLoaded();
+                        }
+                    });
                 }
             }
         });

app/src/main/java/eu/faircode/email/DialogBuilderLifecycle.java

@@ -32,5 +32,7 @@ public class DialogBuilderLifecycle extends AlertDialog.Builder implements Lifec
     @OnLifecycleEvent(Lifecycle.Event.ON_DESTROY)
     public void onDestroy() {
         dialog.dismiss();
+        owner = null;
+        dialog = null;
     }
 }

app/src/main/java/eu/faircode/email/FragmentMessages.java

@@ -667,7 +667,7 @@ public class FragmentMessages extends FragmentEx {
                 case FOLDER:
                     if (searchCallback == null)
                         searchCallback = new BoundaryCallbackMessages(
-                                getContext(), FragmentMessages.this,
+                                getContext(), this,
                                 folder, null, REMOTE_PAGE_SIZE,
                                 new BoundaryCallbackMessages.IBoundaryCallbackMessages() {
                                     @Override
@@ -682,7 +682,6 @@ public class FragmentMessages extends FragmentEx {
 
                                     @Override
                                     public void onError(Context context, Throwable ex) {
-                                        pbWait.setVisibility(View.GONE);
                                         new DialogBuilderLifecycle(getContext(), getViewLifecycleOwner())
                                                 .setMessage(Helper.formatThrowable(ex))
                                                 .setPositiveButton(android.R.string.cancel, null)
@@ -710,7 +709,7 @@ public class FragmentMessages extends FragmentEx {
         } else {
             if (searchCallback == null)
                 searchCallback = new BoundaryCallbackMessages(
-                        getContext(), FragmentMessages.this,
+                        getContext(), this,
                         folder, search, REMOTE_PAGE_SIZE,
                         new BoundaryCallbackMessages.IBoundaryCallbackMessages() {
                             @Override
@@ -728,7 +727,6 @@ public class FragmentMessages extends FragmentEx {
 
                             @Override
                             public void onError(Context context, Throwable ex) {
-                                pbWait.setVisibility(View.GONE);
                                 new DialogBuilderLifecycle(getContext(), getViewLifecycleOwner())
                                         .setMessage(Helper.formatThrowable(ex))
                                         .setPositiveButton(android.R.string.cancel, null)