From ccda71d25ff28e2e5b38795c8beab67db6e2c1a5 Mon Sep 17 00:00:00 2001
From: M66B <M66B@users.noreply.github.com>
Date: Mon, 4 Feb 2019 18:34:36 +0000
Subject: [PATCH] Revert "Remove selection tracker workaround"

This reverts commit 7e7eb8a8aea08adf8ef9e2f45e5f699fd96be167.
---
 .../java/eu/faircode/email/FragmentMessages.java | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/app/src/main/java/eu/faircode/email/FragmentMessages.java b/app/src/main/java/eu/faircode/email/FragmentMessages.java
index 99a150996d..06a5f7caf6 100644
--- a/app/src/main/java/eu/faircode/email/FragmentMessages.java
+++ b/app/src/main/java/eu/faircode/email/FragmentMessages.java
@@ -441,12 +441,24 @@ public class FragmentMessages extends FragmentBase {
                 @Override
                 public void onSelectionChanged() {
                     SelectionTracker tracker = selectionTracker;
-                    if (tracker == null) // destroyed
+                    if (tracker == null)
                         return;
 
                     FragmentActivity activity = getActivity();
-                    if (activity != null)
+                    if (activity != null) {
+                        try {
+                            ViewModelMessages modelMessages = ViewModelProviders.of(activity).get(ViewModelMessages.class);
+                            if (tracker.hasSelection())
+                                modelMessages.removeObservers(viewType, getViewLifecycleOwner());
+                            else
+                                modelMessages.observe(viewType, getViewLifecycleOwner(), observer);
+                        } catch (IllegalStateException ex) {
+                            // getViewLifecycleOwner
+                            Log.w(ex);
+                        }
+
                         activity.invalidateOptionsMenu();
+                    }
 
                     if (tracker.hasSelection()) {
                         swipeRefresh.setEnabled(false);