diff --git a/app/src/main/java/com/osfans/trime/data/DataDirectoryChangeListener.kt b/app/src/main/java/com/osfans/trime/data/DataDirectoryChangeListener.kt
deleted file mode 100644
index b37ae9dd5b..0000000000
--- a/app/src/main/java/com/osfans/trime/data/DataDirectoryChangeListener.kt
+++ /dev/null
@@ -1,19 +0,0 @@
-package com.osfans.trime.data
-
-/**
- * Do something when data directory change.
- */
-object DataDirectoryChangeListener {
-    // listener list
-    val directoryChangeListeners = mutableListOf<DataDirectoryChangeListener.Listener>()
-
-    interface Listener {
-        fun onDataDirectoryChange()
-    }
-
-    fun addDirectoryChangeListener(directoryChangeListener: DataDirectoryChangeListener.Listener) {
-        directoryChangeListeners.add(directoryChangeListener)
-    }
-    // do not remove
-    // 在 directoryChangeListeners 中存放单例类的情况下，不应该尝试调用remove，会导致ConcurrentModificationException
-}
diff --git a/app/src/main/java/com/osfans/trime/data/DataManager.kt b/app/src/main/java/com/osfans/trime/data/DataManager.kt
index ebd2526411..1747acf8ad 100644
--- a/app/src/main/java/com/osfans/trime/data/DataManager.kt
+++ b/app/src/main/java/com/osfans/trime/data/DataManager.kt
@@ -3,6 +3,7 @@ package com.osfans.trime.data
 import com.blankj.utilcode.util.PathUtils
 import com.blankj.utilcode.util.ResourceUtils
 import com.osfans.trime.util.Const
+import com.osfans.trime.util.WeakHashSet
 import timber.log.Timber
 import java.io.File
 
@@ -12,6 +13,24 @@ object DataManager {
 
     val defaultDataDirectory = File(PathUtils.getExternalStoragePath(), "rime")
 
+    private val onDataDirChangeListeners = WeakHashSet<OnDataDirChangeListener>()
+
+    fun interface OnDataDirChangeListener {
+        fun onDataDirChange()
+    }
+
+    fun addOnChangedListener(listener: OnDataDirChangeListener) {
+        onDataDirChangeListeners.add(listener)
+    }
+
+    fun removeOnChangedListener(listener: OnDataDirChangeListener) {
+        onDataDirChangeListeners.remove(listener)
+    }
+
+    fun dirFireChange() {
+        onDataDirChangeListeners.forEach { it.onDataDirChange() }
+    }
+
     @JvmStatic
     val sharedDataDir
         get() = File(prefs.profile.sharedDataDir)
diff --git a/app/src/main/java/com/osfans/trime/data/opencc/OpenCCDictManager.kt b/app/src/main/java/com/osfans/trime/data/opencc/OpenCCDictManager.kt
index 4c1c934ac9..be55809b45 100644
--- a/app/src/main/java/com/osfans/trime/data/opencc/OpenCCDictManager.kt
+++ b/app/src/main/java/com/osfans/trime/data/opencc/OpenCCDictManager.kt
@@ -1,6 +1,6 @@
 package com.osfans.trime.data.opencc
 
-import com.osfans.trime.data.DataDirectoryChangeListener
+import androidx.annotation.Keep
 import com.osfans.trime.data.DataManager
 import com.osfans.trime.data.opencc.dict.Dictionary
 import com.osfans.trime.data.opencc.dict.OpenCCDictionary
@@ -11,24 +11,26 @@ import java.io.File
 import java.io.InputStream
 import kotlin.system.measureTimeMillis
 
-object OpenCCDictManager : DataDirectoryChangeListener.Listener {
+object OpenCCDictManager {
+    /**
+     * Update sharedDir and userDir.
+     */
+    @Keep
+    private val onDataDirChange =
+        DataManager.OnDataDirChangeListener {
+            sharedDir = File(DataManager.sharedDataDir, "opencc").also { it.mkdirs() }
+            userDir = File(DataManager.userDataDir, "opencc").also { it.mkdirs() }
+        }
+
     init {
         System.loadLibrary("rime_jni")
         // register listener
-        DataDirectoryChangeListener.addDirectoryChangeListener(this)
+        DataManager.addOnChangedListener(onDataDirChange)
     }
 
     var sharedDir = File(DataManager.sharedDataDir, "opencc").also { it.mkdirs() }
     var userDir = File(DataManager.userDataDir, "opencc").also { it.mkdirs() }
 
-    /**
-     * Update sharedDir and userDir.
-     */
-    override fun onDataDirectoryChange() {
-        sharedDir = File(DataManager.sharedDataDir, "opencc").also { it.mkdirs() }
-        userDir = File(DataManager.userDataDir, "opencc").also { it.mkdirs() }
-    }
-
     fun sharedDictionaries(): List<Dictionary> =
         sharedDir
             .listFiles()
diff --git a/app/src/main/java/com/osfans/trime/data/sound/SoundThemeManager.kt b/app/src/main/java/com/osfans/trime/data/sound/SoundThemeManager.kt
index 99c63d9071..9ca551ff95 100644
--- a/app/src/main/java/com/osfans/trime/data/sound/SoundThemeManager.kt
+++ b/app/src/main/java/com/osfans/trime/data/sound/SoundThemeManager.kt
@@ -1,27 +1,24 @@
 package com.osfans.trime.data.sound
 
+import androidx.annotation.Keep
 import com.charleskorn.kaml.Yaml
 import com.charleskorn.kaml.YamlConfiguration
 import com.osfans.trime.data.AppPrefs
-import com.osfans.trime.data.DataDirectoryChangeListener
 import com.osfans.trime.data.DataManager
 import timber.log.Timber
 import java.io.File
 
-object SoundThemeManager : DataDirectoryChangeListener.Listener {
+object SoundThemeManager {
     var userDir = File(DataManager.userDataDir, "sound")
 
-    init {
-        // register listener
-        DataDirectoryChangeListener.addDirectoryChangeListener(this)
-    }
-
     /**
      * Update userDir.
      */
-    override fun onDataDirectoryChange() {
-        userDir = File(DataManager.userDataDir, "sound")
-    }
+    @Keep
+    private val onDataDirChange =
+        DataManager.OnDataDirChangeListener {
+            userDir = File(DataManager.userDataDir, "sound")
+        }
 
     private val yaml =
         Yaml(
@@ -64,6 +61,8 @@ object SoundThemeManager : DataDirectoryChangeListener.Listener {
     }
 
     fun init() {
+        // register listener
+        DataManager.addOnChangedListener(onDataDirChange)
         currentSoundTheme = getSound(AppPrefs.defaultInstance().keyboard.customSoundPackage) ?: return
     }
 
diff --git a/app/src/main/java/com/osfans/trime/data/theme/ThemeManager.kt b/app/src/main/java/com/osfans/trime/data/theme/ThemeManager.kt
index 009b46e19a..0919c83f3d 100644
--- a/app/src/main/java/com/osfans/trime/data/theme/ThemeManager.kt
+++ b/app/src/main/java/com/osfans/trime/data/theme/ThemeManager.kt
@@ -1,14 +1,26 @@
 package com.osfans.trime.data.theme
 
+import androidx.annotation.Keep
 import com.osfans.trime.data.AppPrefs
-import com.osfans.trime.data.DataDirectoryChangeListener
 import com.osfans.trime.data.DataManager
 import java.io.File
 
-object ThemeManager : DataDirectoryChangeListener.Listener {
+object ThemeManager {
+    /**
+     * Update sharedThemes and userThemes.
+     */
+    @Keep
+    private val onDataDirChange =
+        DataManager.OnDataDirChangeListener {
+            sharedThemes.clear()
+            userThemes.clear()
+            sharedThemes.addAll(listThemes(DataManager.sharedDataDir))
+            userThemes.addAll(listThemes(DataManager.userDataDir))
+        }
+
     init {
         // register listener
-        DataDirectoryChangeListener.addDirectoryChangeListener(this)
+        DataManager.addOnChangedListener(onDataDirChange)
     }
 
     private fun listThemes(path: File): MutableList<String> {
@@ -22,17 +34,9 @@ object ThemeManager : DataDirectoryChangeListener.Listener {
         AppPrefs.defaultInstance().themeAndColor.selectedTheme = theme
     }
 
-    var sharedThemes: MutableList<String> = listThemes(DataManager.sharedDataDir)
+    val sharedThemes: MutableList<String> = listThemes(DataManager.sharedDataDir)
 
-    var userThemes: MutableList<String> = listThemes(DataManager.userDataDir)
-
-    /**
-     * Update sharedThemes and userThemes.
-     */
-    override fun onDataDirectoryChange() {
-        sharedThemes = listThemes(DataManager.sharedDataDir)
-        userThemes = listThemes(DataManager.userDataDir)
-    }
+    val userThemes: MutableList<String> = listThemes(DataManager.userDataDir)
 
     @JvmStatic
     fun getAllThemes(): List<String> {
diff --git a/app/src/main/java/com/osfans/trime/ime/core/RimeWrapper.kt b/app/src/main/java/com/osfans/trime/ime/core/RimeWrapper.kt
index 0cab40acab..0a7b0152d2 100644
--- a/app/src/main/java/com/osfans/trime/ime/core/RimeWrapper.kt
+++ b/app/src/main/java/com/osfans/trime/ime/core/RimeWrapper.kt
@@ -3,7 +3,7 @@ package com.osfans.trime.ime.core
 import android.os.Looper
 import androidx.core.os.HandlerCompat
 import com.osfans.trime.core.Rime
-import com.osfans.trime.data.DataDirectoryChangeListener
+import com.osfans.trime.data.DataManager
 import com.osfans.trime.data.theme.Theme
 import com.osfans.trime.util.appContext
 import com.osfans.trime.util.isStorageAvailable
@@ -67,9 +67,7 @@ object RimeWrapper {
                 _statusStateFlow.value = Status.IN_PROGRESS
                 mutex.unlock()
 
-                DataDirectoryChangeListener.directoryChangeListeners.forEach {
-                    it.onDataDirectoryChange()
-                }
+                DataManager.dirFireChange()
 
                 Rime.deploy()