优化

app/src/main/java/io/legado/app/data/dao/ReplaceRuleDao.kt

@@ -29,6 +29,9 @@ interface ReplaceRuleDao {
     @get:Query("SELECT * FROM replace_rules ORDER BY sortOrder ASC")
     val all: List<ReplaceRule>
 
+    @get:Query("select distinct `group` from replace_rules where trim(`group`) <> ''")
+    val allGroup: List<String>
+
     @get:Query("SELECT * FROM replace_rules WHERE isEnabled = 1 ORDER BY sortOrder ASC")
     val allEnabled: List<ReplaceRule>
 

app/src/main/java/io/legado/app/ui/association/ImportReplaceRuleDialog.kt

@@ -146,7 +146,7 @@ class ImportReplaceRuleDialog() : BaseDialogFragment(), Toolbar.OnMenuItemClickL
         alert(R.string.diy_edit_source_group) {
             val alertBinding = DialogCustomGroupBinding.inflate(layoutInflater).apply {
                 val groups = linkedSetOf<String>()
-                appDb.bookSourceDao.allGroup.forEach { group ->
+                appDb.replaceRuleDao.allGroup.forEach { group ->
                     groups.addAll(group.splitNotBlank(AppPattern.splitGroupRegex))
                 }
                 textInputLayout.setHint(R.string.group_name)