fix NPE after race condition. fixes #4033

2 files changed, 11 insertions, 6 deletions

diff --git a/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java b/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java
index 4fa4d8185..82b9eb143 100644
--- a/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java
+++ b/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java
@@ -2992,6 +2992,11 @@ public class ConversationFragment extends XmppFragment implements EditMessage.Ke
             final Menu menu = popupMenu.getMenu();
             menu.findItem(R.id.action_manage_accounts).setVisible(QuickConversationsService.isConversations());
             popupMenu.setOnMenuItemClickListener(item -> {
+                final XmppActivity activity = this.activity;
+                if (activity == null) {
+                    Log.e(Config.LOGTAG,"Unable to perform action. no context provided");
+                    return true;
+                }
                 switch (item.getItemId()) {
                     case R.id.action_show_qr_code:
                         activity.showQrCode(conversation.getAccount().getShareableUri());
diff --git a/src/main/java/eu/siacs/conversations/utils/AccountUtils.java b/src/main/java/eu/siacs/conversations/utils/AccountUtils.java
index a324b242e..8f0453218 100644
--- a/src/main/java/eu/siacs/conversations/utils/AccountUtils.java
+++ b/src/main/java/eu/siacs/conversations/utils/AccountUtils.java
@@ -17,7 +17,7 @@ import eu.siacs.conversations.ui.XmppActivity;
 
 public class AccountUtils {
 
-    public static final Class MANAGE_ACCOUNT_ACTIVITY;
+    public static final Class<?> MANAGE_ACCOUNT_ACTIVITY;
 
     static {
         MANAGE_ACCOUNT_ACTIVITY = getManageAccountActivityClass();
@@ -78,7 +78,7 @@ public class AccountUtils {
         return pending;
     }
 
-    public static void launchManageAccounts(Activity activity) {
+    public static void launchManageAccounts(final Activity activity) {
         if (MANAGE_ACCOUNT_ACTIVITY != null) {
             activity.startActivity(new Intent(activity, MANAGE_ACCOUNT_ACTIVITY));
         } else {
@@ -86,15 +86,15 @@ public class AccountUtils {
         }
     }
 
-    public static void launchManageAccount(XmppActivity xmppActivity) {
-        Account account = getFirst(xmppActivity.xmppConnectionService);
+    public static void launchManageAccount(final XmppActivity xmppActivity) {
+        final Account account = getFirst(xmppActivity.xmppConnectionService);
         xmppActivity.switchToAccount(account);
     }
 
-    private static Class getManageAccountActivityClass() {
+    private static Class<?> getManageAccountActivityClass() {
         try {
             return Class.forName("eu.siacs.conversations.ui.ManageAccountActivity");
-        } catch (ClassNotFoundException e) {
+        } catch (final ClassNotFoundException e) {
             return null;
         }
     }