diff --git a/app/src/main/java/com/casic/endoscope/view/AlbumActivity.kt b/app/src/main/java/com/casic/endoscope/view/AlbumActivity.kt
index 46ee213..cbdda93 100644
--- a/app/src/main/java/com/casic/endoscope/view/AlbumActivity.kt
+++ b/app/src/main/java/com/casic/endoscope/view/AlbumActivity.kt
@@ -31,21 +31,26 @@
     private val context = this@AlbumActivity
 
     //子文件夹集合
-    private var dirBeans = ArrayList<File>()
+    private lateinit var tempSet: HashSet<String>
+    private lateinit var dirBeans: MutableList<String>
     private lateinit var directoryAdapter: MediaDirAdapter
 
     @SuppressLint("NotifyDataSetChanged")
     override fun initEvent() {
         binding.ascButton.setOnClickListener {
             //按时间排序，降序
-            dirBeans.sortByDescending { dir -> dir.name }
-            directoryAdapter.notifyDataSetChanged()
+            dirBeans = tempSet.sortedWith { d1, d2 ->
+                d2.compareTo(d1)
+            }.toMutableList()
+            directoryAdapter.setRefreshData(dirBeans)
         }
 
         binding.decButton.setOnClickListener {
             //升序
-            dirBeans.sortBy { dir -> dir.name }
-            directoryAdapter.notifyDataSetChanged()
+            dirBeans = tempSet.sortedWith { d1, d2 ->
+                d1.compareTo(d2)
+            }.toMutableList()
+            directoryAdapter.setRefreshData(dirBeans)
         }
 
         //替换onBackPressed
@@ -72,15 +77,12 @@
         }
 
         //去重
-        val directoryNameSet = HashSet<String>(temp)
+        tempSet = HashSet(temp)
 
-        //全部转为File类型，方便是用自带的排序函数
-        directoryNameSet.forEach {
-            dirBeans.add(File(it))
-        }
-
-        //按时间排序，降序
-        dirBeans.sortByDescending { dir -> dir.name }
+        //排序，降序
+        dirBeans = tempSet.sortedWith { d1, d2 ->
+            d2.compareTo(d1)
+        }.toMutableList()
 
         //绑定数据
         directoryAdapter = object : MediaDirAdapter(this, dirBeans) {