From 8fac28cf73fc1a0bc598799d39feba7866ee2760 Mon Sep 17 00:00:00 2001
From: M66B <M66B@users.noreply.github.com>
Date: Mon, 29 May 2023 21:07:13 +0200
Subject: [PATCH] Small improvement

---
 app/src/main/java/eu/faircode/email/AdapterAttachment.java | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/app/src/main/java/eu/faircode/email/AdapterAttachment.java b/app/src/main/java/eu/faircode/email/AdapterAttachment.java
index 6e66c0e0ec..915d7bb7ec 100644
--- a/app/src/main/java/eu/faircode/email/AdapterAttachment.java
+++ b/app/src/main/java/eu/faircode/email/AdapterAttachment.java
@@ -57,6 +57,7 @@ import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Comparator;
 import java.util.List;
+import java.util.Locale;
 
 import javax.mail.Part;
 
@@ -391,7 +392,8 @@ public class AdapterAttachment extends RecyclerView.Adapter<AdapterAttachment.Vi
         }
 
         private void onView(EntityAttachment attachment) {
-            String extension = Helper.getExtension(attachment.name);
+            String ext = Helper.getExtension(attachment.name);
+            String extension = (ext == null ? null : ext.toLowerCase(Locale.ROOT));
 
             SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
             boolean confirm = prefs.getBoolean("confirm_files", true);