Clear Realm on asynchronous thread and also clear cookies.

app/src/main/java/chat/rocket/android/activity/MainActivity.java

@@ -251,12 +251,6 @@ public class MainActivity extends AbstractAuthedActivity implements MainContract
             R.string.server_config_activity_authenticating, Snackbar.LENGTH_INDEFINITE));
   }
 
-  public void showLogoutMessage() {
-    statusTicker.updateStatus(StatusTicker.STATUS_LOGGING_OUT,
-            Snackbar.make(findViewById(getLayoutContainerForFragment()),
-                    "Logging Out...", Snackbar.LENGTH_INDEFINITE));
-  }
-
   @Override
   public void showConnectionOk() {
     statusTicker.updateStatus(StatusTicker.STATUS_DISMISS, null);
@@ -314,11 +308,6 @@ public class MainActivity extends AbstractAuthedActivity implements MainContract
     }
   }
 
-  @DebugLog
-  public void hideLogoutMessage() {
-    statusTicker.updateStatus(StatusTicker.STATUS_DISMISS, null);
-  }
-
   @DebugLog
   public void onLogout() {
     if (new RocketChatCache(getApplicationContext()).getSelectedServerHostname() == null) {

app/src/main/java/chat/rocket/android/fragment/sidebar/SidebarMainFragment.java

@@ -325,7 +325,6 @@ public class SidebarMainFragment extends AbstractFragment implements SidebarMain
   public void onLogoutCleanUp() {
     Activity activity = getActivity();
     if (activity != null && activity instanceof MainActivity) {
-      ((MainActivity) activity).hideLogoutMessage();
       ((MainActivity) activity).onLogout();
       presenter.onLogout(task -> {
         if (task.isFaulted()) {
@@ -343,7 +342,6 @@ public class SidebarMainFragment extends AbstractFragment implements SidebarMain
       presenter.beforeLogoutCleanUp();
       final Activity activity = getActivity();
       if (activity != null && activity instanceof MainActivity) {
-        ((MainActivity) activity).showLogoutMessage();
         // Clear subscriptions on MainPresenter.
         ((MainActivity) activity).beforeLogoutCleanUp();
       }

app/src/main/java/chat/rocket/android/fragment/sidebar/SidebarMainPresenter.java

@@ -2,6 +2,7 @@ package chat.rocket.android.fragment.sidebar;
 
 import android.support.annotation.NonNull;
 import android.support.v4.util.Pair;
+import android.webkit.CookieManager;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -154,7 +155,8 @@ public class SidebarMainPresenter extends BasePresenter<SidebarMainContract.View
         String currentHostname = rocketChatCache.getSelectedServerHostname();
         RealmHelper realmHelper = RealmStore.getOrCreate(currentHostname);
         realmHelper.executeTransaction(realm -> {
-            realm.deleteAll();
+            realm.executeTransactionAsync(realmObj -> realmObj.deleteAll());
+            CookieManager.getInstance().removeAllCookie();
             ConnectivityManagerApi connectivityManagerApi = ConnectivityManager.getInstance(RocketChatApplication.getInstance());
             connectivityManagerApi.removeServer(currentHostname);
             rocketChatCache.removeHostname(currentHostname);

persistence-realm/src/main/java/chat/rocket/persistence/realm/RealmHelper.java

@@ -122,7 +122,7 @@ public class RealmHelper {
     return task.getTask();
   }
 
-  private Task<Void> executeTransactionAsync(final RealmHelper.Transaction transaction) {
+  public Task<Void> executeTransactionAsync(final RealmHelper.Transaction transaction) {
     final TaskCompletionSource<Void> task = new TaskCompletionSource<>();
 
     final Realm realm = instance();