diff --git a/app/src/main/java/com/osfans/trime/data/theme/Theme.kt b/app/src/main/java/com/osfans/trime/data/theme/Theme.kt
index 8ec71a9789..e3b1d76853 100644
--- a/app/src/main/java/com/osfans/trime/data/theme/Theme.kt
+++ b/app/src/main/java/com/osfans/trime/data/theme/Theme.kt
@@ -5,7 +5,6 @@
 package com.osfans.trime.data.theme
 
 import com.osfans.trime.core.Rime
-import com.osfans.trime.data.prefs.AppPrefs
 import com.osfans.trime.data.theme.mapper.GeneralStyleMapper
 import com.osfans.trime.data.theme.model.GeneralStyle
 import com.osfans.trime.util.config.Config
@@ -32,7 +31,6 @@ class Theme(
         private set
 
     companion object {
-        private val prefs = AppPrefs.defaultInstance().theme
         private const val VERSION_KEY = "config_version"
         private const val DEFAULT_THEME_NAME = "trime"
 
@@ -70,7 +68,6 @@ class Theme(
         presetColorSchemes = config.getMap("preset_color_schemes")
         presetKeyboards = config.getMap("preset_keyboards")
         Timber.i("The theme is initialized")
-        prefs.selectedTheme = name
     }
 
     private fun mapToGeneralStyle(config: Config): GeneralStyle {
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 4d972b780d..394a0b9b4d 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
@@ -8,6 +8,7 @@ import androidx.annotation.Keep
 import com.osfans.trime.data.base.DataManager
 import com.osfans.trime.data.prefs.AppPrefs
 import com.osfans.trime.ime.symbol.TabManager
+import com.osfans.trime.util.WeakHashSet
 import java.io.File
 
 object ThemeManager {
@@ -50,23 +51,50 @@ object ThemeManager {
         setNormalTheme(prefs.selectedTheme)
     }
 
-    lateinit var activeTheme: Theme
-        private set
+    private lateinit var _activeTheme: Theme
+
+    var activeTheme: Theme
+        get() = _activeTheme
+        set(value) {
+            if (::_activeTheme.isInitialized && _activeTheme == value) return
+            _activeTheme = value
+            fireChange()
+        }
+
+    private val onChangeListeners = WeakHashSet<OnThemeChangeListener>()
+
+    fun addOnChangedListener(listener: OnThemeChangeListener) {
+        onChangeListeners.add(listener)
+    }
+
+    fun removeOnChangedListener(listener: OnThemeChangeListener) {
+        onChangeListeners.remove(listener)
+    }
+
+    private fun fireChange() {
+        onChangeListeners.forEach { it.onThemeChange(_activeTheme) }
+    }
 
     private val prefs = AppPrefs.defaultInstance().theme
 
-    fun init() = setNormalTheme(prefs.selectedTheme)
+    fun init() {
+        Theme(prefs.selectedTheme).let {
+            EventManager.resetCache()
+            FontManager.resetCache(it)
+            ColorManager.resetCache(it)
+            TabManager.resetCache(it)
+            _activeTheme = it
+        }
+    }
 
     fun setNormalTheme(name: String) {
         Theme(name).let {
-            if (::activeTheme.isInitialized) {
-                if (activeTheme == it) return
-            }
             EventManager.resetCache()
             FontManager.resetCache(it)
             ColorManager.resetCache(it)
             TabManager.resetCache(it)
             activeTheme = it
         }
+        prefs.selectedTheme = name
     }
 }
diff --git a/app/src/main/java/com/osfans/trime/ime/core/InputView.kt b/app/src/main/java/com/osfans/trime/ime/core/InputView.kt
index 3376705fb2..60d729a25f 100644
--- a/app/src/main/java/com/osfans/trime/ime/core/InputView.kt
+++ b/app/src/main/java/com/osfans/trime/ime/core/InputView.kt
@@ -51,6 +51,7 @@ import splitties.views.dsl.constraintlayout.constraintLayout
 import splitties.views.dsl.constraintlayout.endOfParent
 import splitties.views.dsl.constraintlayout.endToStartOf
 import splitties.views.dsl.constraintlayout.lParams
+import splitties.views.dsl.constraintlayout.matchConstraints
 import splitties.views.dsl.constraintlayout.startOfParent
 import splitties.views.dsl.constraintlayout.startToEndOf
 import splitties.views.dsl.constraintlayout.topOfParent
@@ -236,7 +237,7 @@ class InputView(
                 )
                 add(
                     windowManager.view,
-                    lParams(matchParent, wrapContent) {
+                    lParams(matchConstraints, wrapContent) {
                         below(quickBar.view)
                         above(bottomPaddingSpace)
                     },
diff --git a/app/src/main/java/com/osfans/trime/ime/core/TrimeInputMethodService.kt b/app/src/main/java/com/osfans/trime/ime/core/TrimeInputMethodService.kt
index 914dd99478..e4b5e1859a 100644
--- a/app/src/main/java/com/osfans/trime/ime/core/TrimeInputMethodService.kt
+++ b/app/src/main/java/com/osfans/trime/ime/core/TrimeInputMethodService.kt
@@ -29,6 +29,7 @@ import android.view.inputmethod.ExtractedTextRequest
 import android.widget.FrameLayout
 import android.widget.LinearLayout
 import androidx.annotation.Keep
+import androidx.core.content.ContextCompat
 import androidx.core.view.isVisible
 import androidx.core.view.updateLayoutParams
 import androidx.lifecycle.lifecycleScope
@@ -76,8 +77,6 @@ import splitties.systemservices.inputMethodManager
 import splitties.views.gravityBottom
 import timber.log.Timber
 import java.util.Locale
-import kotlin.coroutines.CoroutineContext
-import kotlin.coroutines.EmptyCoroutineContext
 
 /** [輸入法][InputMethodService]主程序  */
 
@@ -102,6 +101,12 @@ open class TrimeInputMethodService : LifecycleInputMethodService() {
     var lastCommittedText: CharSequence = ""
         private set
 
+    @Keep
+    private val onThemeChangeListener =
+        ThemeManager.OnThemeChangeListener {
+            recreateInputView(it)
+        }
+
     @Keep
     private val onColorChangeListener =
         ColorManager.OnColorChangeListener {
@@ -111,11 +116,10 @@ open class TrimeInputMethodService : LifecycleInputMethodService() {
         }
 
     private fun postJob(
-        ctx: CoroutineContext,
         scope: CoroutineScope,
         block: suspend () -> Unit,
     ): Job {
-        val job = scope.launch(ctx, CoroutineStart.LAZY) { block() }
+        val job = scope.launch(start = CoroutineStart.LAZY) { block() }
         jobs.trySend(job)
         return job
     }
@@ -127,10 +131,7 @@ open class TrimeInputMethodService : LifecycleInputMethodService() {
      * subsequent operations can start if the prior operation is not finished (suspended),
      * [postRimeJob] ensures that operations are executed sequentially.
      */
-    fun postRimeJob(
-        ctx: CoroutineContext = EmptyCoroutineContext,
-        block: suspend RimeApi.() -> Unit,
-    ) = postJob(ctx, rime.lifecycleScope) { rime.runOnReady(block) }
+    fun postRimeJob(block: suspend RimeApi.() -> Unit) = postJob(rime.lifecycleScope) { rime.runOnReady(block) }
 
     override fun onWindowShown() {
         super.onWindowShown()
@@ -222,6 +223,7 @@ open class TrimeInputMethodService : LifecycleInputMethodService() {
                 handleRimeResponse(it)
             }
         }
+        ThemeManager.addOnChangedListener(onThemeChangeListener)
         ColorManager.addOnChangedListener(onColorChangeListener)
         super.onCreate()
         instance = this
@@ -324,6 +326,7 @@ open class TrimeInputMethodService : LifecycleInputMethodService() {
         mIntentReceiver = null
         InputFeedbackManager.destroy()
         inputView = null
+        ThemeManager.removeOnChangedListener(onThemeChangeListener)
         ColorManager.removeOnChangedListener(onColorChangeListener)
         super.onDestroy()
         RimeDaemon.destroySession(javaClass.name)
@@ -413,8 +416,10 @@ open class TrimeInputMethodService : LifecycleInputMethodService() {
 
     override fun onCreateInputView(): View {
         Timber.d("onCreateInputView")
-        postRimeJob(Dispatchers.Main) {
-            recreateInputView(ThemeManager.activeTheme)
+        postRimeJob {
+            ContextCompat.getMainExecutor(this@TrimeInputMethodService).execute {
+                recreateInputView(ThemeManager.activeTheme)
+            }
         }
         initializationUi = InitializationUi(this)
         return initializationUi!!.root
@@ -460,7 +465,7 @@ open class TrimeInputMethodService : LifecycleInputMethodService() {
         restarting: Boolean,
     ) {
         Timber.d("onStartInputView: restarting=%s", restarting)
-        postRimeJob(Dispatchers.Main) {
+        postRimeJob {
             InputFeedbackManager.loadSoundEffects(this@TrimeInputMethodService)
             InputFeedbackManager.resetPlayProgress()
             isComposable =
@@ -477,8 +482,9 @@ open class TrimeInputMethodService : LifecycleInputMethodService() {
             if (prefs.other.showStatusBarIcon) {
                 showStatusIcon(R.drawable.ic_trime_status) // 狀態欄圖標
             }
-            setCandidatesViewShown(!rime.run { isEmpty() }) // 軟鍵盤出現時顯示候選欄
-            inputView?.startInput(attribute, restarting)
+            ContextCompat.getMainExecutor(this@TrimeInputMethodService).execute {
+                inputView?.startInput(attribute, restarting)
+            }
             when (attribute.inputType and InputType.TYPE_MASK_VARIATION) {
                 InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS,
                 InputType.TYPE_TEXT_VARIATION_PASSWORD,
diff --git a/app/src/main/java/com/osfans/trime/ime/keyboard/KeyboardWindow.kt b/app/src/main/java/com/osfans/trime/ime/keyboard/KeyboardWindow.kt
index 63f3d81cef..888ba4d4c2 100644
--- a/app/src/main/java/com/osfans/trime/ime/keyboard/KeyboardWindow.kt
+++ b/app/src/main/java/com/osfans/trime/ime/keyboard/KeyboardWindow.kt
@@ -12,6 +12,7 @@ import android.view.View
 import android.view.inputmethod.EditorInfo
 import android.widget.FrameLayout
 import androidx.core.content.ContextCompat
+import com.osfans.trime.R
 import com.osfans.trime.core.Rime
 import com.osfans.trime.core.RimeNotification.OptionNotification
 import com.osfans.trime.daemon.RimeSession
@@ -76,7 +77,7 @@ class KeyboardWindow(
     private val currentKeyboard: Keyboard? get() = keyboardsCached[currentKeyboardId]
 
     override fun onCreateView(): View {
-        keyboardView = context.frameLayout()
+        keyboardView = context.frameLayout(R.id.keyboard_view)
         attachKeyboard(evalKeyboard(".default"))
         keyboardView.apply { add(mainKeyboardView, lParams(matchParent, matchParent)) }
         return keyboardView
diff --git a/app/src/main/java/com/osfans/trime/ime/window/BoardWindowManager.kt b/app/src/main/java/com/osfans/trime/ime/window/BoardWindowManager.kt
index 383c4a0ea3..20b48d85bc 100644
--- a/app/src/main/java/com/osfans/trime/ime/window/BoardWindowManager.kt
+++ b/app/src/main/java/com/osfans/trime/ime/window/BoardWindowManager.kt
@@ -10,6 +10,7 @@ import android.widget.FrameLayout
 import androidx.transition.Transition
 import androidx.transition.TransitionManager
 import androidx.transition.TransitionSet
+import com.osfans.trime.R
 import com.osfans.trime.ime.broadcast.InputBroadcaster
 import com.osfans.trime.ime.dependency.InputScope
 import me.tatarka.inject.annotations.Inject
@@ -60,6 +61,7 @@ class BoardWindowManager(
                 throw IllegalStateException("${window.key} is already occupied")
             }
         }
+        broadcaster.addReceiver(window)
         val view = if (createView) window.onCreateView() else null
         cachedResidentWindows[window.key] = window to view
     }
@@ -111,7 +113,7 @@ class BoardWindowManager(
         broadcaster.onWindowAttached(window)
     }
 
-    val view: FrameLayout by lazy { context.frameLayout() }
+    val view: FrameLayout by lazy { context.frameLayout(R.id.input_window) }
 
     fun isAttached(window: BoardWindow) = currentWindow === window
 }
diff --git a/app/src/main/res/values/input_view_ids.xml b/app/src/main/res/values/input_view_ids.xml
index 48c8caebcf..e27faa8649 100644
--- a/app/src/main/res/values/input_view_ids.xml
+++ b/app/src/main/res/values/input_view_ids.xml
@@ -9,4 +9,6 @@ SPDX-License-Identifier: GPL-3.0-or-later
 <resources>
     <item name="candidate_view" type="id" />
     <item name="unrolled_candidate_view" type="id" />
+    <item name="input_window" type="id" />
+    <item name="keyboard_view" type="id" />
 </resources>