feat: 优化代码

app/src/main/java/io/legado/app/ui/book/local/ImportBookActivity.kt

@@ -162,6 +162,7 @@ class ImportBookActivity : VMBaseActivity<ImportBookViewModel>(R.layout.activity
             val docList = arrayListOf<DocItem>()
             File(path).listFiles()?.forEach {
                 if (it.isDirectory) {
+                    if (!it.name.startsWith("."))
                         docList.add(
                             DocItem(
                                 it.name,
@@ -183,6 +184,7 @@ class ImportBookActivity : VMBaseActivity<ImportBookViewModel>(R.layout.activity
                     )
                 }
             }
+            docList.sortWith(compareBy({ !it.isDir }, { it.name }))
             adapter.setData(docList)
         }
     }