Check for null mime type

The mime type could be null when looking up extension in getExtFromMimeType. Check it first to avoid an NPE.

Test: com.android.providers.media.util.MimeUtilsTest
Bug: 401468886
Flag: EXEMPT test fix
Change-Id: Ie4b5424da6d38a11e300995fd407d8429a67cd39

1 files changed, 4 insertions, 0 deletions

diff --git a/src/com/android/providers/media/util/MimeTypeFixHandler.java b/src/com/android/providers/media/util/MimeTypeFixHandler.java
index 3a58bdcc8..8bdd88ef1 100644
--- a/src/com/android/providers/media/util/MimeTypeFixHandler.java
+++ b/src/com/android/providers/media/util/MimeTypeFixHandler.java
@@ -163,6 +163,10 @@ public final class MimeTypeFixHandler {
      * @return Optional file extension, or empty.
      */
     static Optional<String> getExtFromMimeType(String mimeType) {
+        if (mimeType == null) {
+            return Optional.empty();
+        }
+
         mimeType = mimeType.toLowerCase(Locale.ROOT);
         return Optional.ofNullable(sMimeTypeToExt.get(mimeType));
     }