diff --git a/library/src/main/java/cn/finalteam/rxgalleryfinal/utils/FilenameUtils.java b/library/src/main/java/cn/finalteam/rxgalleryfinal/utils/FilenameUtils.java
index 7b8f963d..a0e2df09 100644
--- a/library/src/main/java/cn/finalteam/rxgalleryfinal/utils/FilenameUtils.java
+++ b/library/src/main/java/cn/finalteam/rxgalleryfinal/utils/FilenameUtils.java
@@ -469,7 +469,7 @@ private static String doNormalize(String filename, char separator, boolean keepS
      * @param fullFilenameToAdd the filename (or path) to attach to the base
      * @return the concatenated path, or null if invalid
      */
-    public static String concat(String basePath, String fullFilenameToAdd) {
+    public static String addBasePath(String basePath, String fullFilenameToAdd) {
         int prefix = getPrefixLength(fullFilenameToAdd);
         if (prefix < 0) {
             return null;