diff --git a/frontend/mobile-app/android/app/src/main/res/xml/file_paths.xml b/frontend/mobile-app/android/app/src/main/res/xml/file_paths.xml
index 35b31f90..7e1c29d3 100644
--- a/frontend/mobile-app/android/app/src/main/res/xml/file_paths.xml
+++ b/frontend/mobile-app/android/app/src/main/res/xml/file_paths.xml
@@ -2,6 +2,8 @@
 <paths>
     <!-- 应用内部文件目录 -->
     <files-path name="internal_files" path="." />
+    <!-- Flutter Documents 目录 (getApplicationDocumentsDirectory) -->
+    <files-path name="app_flutter" path="app_flutter/" />
     <!-- 应用缓存目录 -->
     <cache-path name="cache" path="." />
     <!-- 应用外部文件目录 -->