diff --git a/.idea/compiler.xml b/.idea/compiler.xml
index d5143017..e8373bc9 100644
--- a/.idea/compiler.xml
+++ b/.idea/compiler.xml
@@ -3,11 +3,11 @@
   <component name="CompilerConfiguration">
     <bytecodeTargetLevel target="1.8">
       <module name="apng" target="1.7" />
-      <module name="SubwayTooter.apng_android" target="14" />
-      <module name="SubwayTooter.app" target="14" />
-      <module name="SubwayTooter.colorpicker" target="14" />
-      <module name="SubwayTooter.emoji" target="14" />
-      <module name="SubwayTooter.sample_apng" target="14" />
+      <module name="SubwayTooter.apng_android" target="11" />
+      <module name="SubwayTooter.app" target="11" />
+      <module name="SubwayTooter.colorpicker" target="11" />
+      <module name="SubwayTooter.emoji" target="11" />
+      <module name="SubwayTooter.sample_apng" target="11" />
     </bytecodeTargetLevel>
   </component>
 </project>
\ No newline at end of file
diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index 0ae805fa..73b965bb 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -7,7 +7,7 @@
         <option name="testRunner" value="GRADLE" />
         <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
-        <option name="gradleJvm" value="azul-14" />
+        <option name="gradleJvm" value="Embedded JDK" />
         <option name="modules">
           <set>
             <option value="$PROJECT_DIR$" />
diff --git a/apng/build.gradle b/apng/build.gradle
index 12e85c1d..4cabc2c5 100644
--- a/apng/build.gradle
+++ b/apng/build.gradle
@@ -11,3 +11,22 @@ dependencies {
 
 sourceCompatibility = JavaVersion.VERSION_1_8
 targetCompatibility = JavaVersion.VERSION_1_8
+
+compileKotlin {
+
+    sourceCompatibility = JavaVersion.VERSION_1_8
+    targetCompatibility = JavaVersion.VERSION_1_8
+
+    kotlinOptions {
+        jvmTarget = jvm_target
+        useIR = true
+        freeCompilerArgs += [
+                "-Xopt-in=kotlin.ExperimentalStdlibApi",
+                "-Xopt-in=kotlinx.coroutines.ExperimentalCoroutinesApi",
+                "-Xopt-in=kotlinx.serialization.ExperimentalSerializationApi",
+                "-Xopt-in=androidx.compose.foundation.ExperimentalFoundationApi",
+                "-Xopt-in=androidx.compose.animation.ExperimentalAnimationApi",
+        ]
+    }
+
+}
diff --git a/apng_android/build.gradle b/apng_android/build.gradle
index f588e18c..bf9fa26d 100644
--- a/apng_android/build.gradle
+++ b/apng_android/build.gradle
@@ -17,6 +17,7 @@ android {
         versionName "1.0"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+        vectorDrawables.useSupportLibrary = true
     }
 
     buildTypes {
diff --git a/app/build.gradle b/app/build.gradle
index f5ebcfd0..82e4c2ef 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -27,6 +27,7 @@ android {
         versionName "4.6.6"
         applicationId "jp.juggler.subwaytooter"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+        vectorDrawables.useSupportLibrary = true
     }
 
     kotlinOptions {
diff --git a/app/src/main/java/jp/juggler/subwaytooter/ActAccountSetting.kt b/app/src/main/java/jp/juggler/subwaytooter/ActAccountSetting.kt
index e3975366..9ee5f056 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/ActAccountSetting.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/ActAccountSetting.kt
@@ -31,6 +31,8 @@ import jp.juggler.subwaytooter.dialog.ActionsDialog
 import jp.juggler.subwaytooter.notification.NotificationHelper
 import jp.juggler.subwaytooter.notification.PollingWorker
 import jp.juggler.subwaytooter.notification.PushSubscriptionHelper
+import jp.juggler.subwaytooter.pref.PrefB
+import jp.juggler.subwaytooter.pref.PrefS
 import jp.juggler.subwaytooter.table.AcctColor
 import jp.juggler.subwaytooter.table.SavedAccount
 import jp.juggler.subwaytooter.util.*
diff --git a/app/src/main/java/jp/juggler/subwaytooter/ActAppSetting.kt b/app/src/main/java/jp/juggler/subwaytooter/ActAppSetting.kt
index 9e353d07..f4056357 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/ActAppSetting.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/ActAppSetting.kt
@@ -29,6 +29,11 @@ import jp.juggler.subwaytooter.appsetting.SettingType
 import jp.juggler.subwaytooter.appsetting.appSettingRoot
 import jp.juggler.subwaytooter.dialog.DlgAppPicker
 import jp.juggler.subwaytooter.notification.PollingWorker
+import jp.juggler.subwaytooter.pref.*
+import jp.juggler.subwaytooter.pref.impl.BooleanPref
+import jp.juggler.subwaytooter.pref.impl.FloatPref
+import jp.juggler.subwaytooter.pref.impl.IntPref
+import jp.juggler.subwaytooter.pref.impl.StringPref
 import jp.juggler.subwaytooter.table.AcctColor
 import jp.juggler.subwaytooter.table.SavedAccount
 import jp.juggler.subwaytooter.util.CustomShare
diff --git a/app/src/main/java/jp/juggler/subwaytooter/ActMain.kt b/app/src/main/java/jp/juggler/subwaytooter/ActMain.kt
index 15893cac..e5e9d66f 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/ActMain.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/ActMain.kt
@@ -30,6 +30,10 @@ import jp.juggler.subwaytooter.column.*
 import jp.juggler.subwaytooter.dialog.DlgQuickTootMenu
 import jp.juggler.subwaytooter.itemviewholder.StatusButtonsPopup
 import jp.juggler.subwaytooter.notification.PollingWorker
+import jp.juggler.subwaytooter.pref.PrefB
+import jp.juggler.subwaytooter.pref.PrefI
+import jp.juggler.subwaytooter.pref.PrefS
+import jp.juggler.subwaytooter.pref.put
 import jp.juggler.subwaytooter.span.MyClickableSpan
 import jp.juggler.subwaytooter.span.MyClickableSpanHandler
 import jp.juggler.subwaytooter.table.SavedAccount
diff --git a/app/src/main/java/jp/juggler/subwaytooter/ActMediaViewer.kt b/app/src/main/java/jp/juggler/subwaytooter/ActMediaViewer.kt
index 18c07413..08763b1d 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/ActMediaViewer.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/ActMediaViewer.kt
@@ -56,6 +56,7 @@ class ActMediaViewer : AppCompatActivity(), View.OnClickListener {
         internal const val EXTRA_IDX = "idx"
         internal const val EXTRA_DATA = "data"
         internal const val EXTRA_SERVICE_TYPE = "serviceType"
+        internal const val EXTRA_SHOW_DESCRIPTION = "showDescription"
 
         internal const val STATE_PLAYER_POS = "playerPos"
         internal const val STATE_PLAYER_PLAY_WHEN_READY = "playerPlayWhenReady"
@@ -74,6 +75,7 @@ class ActMediaViewer : AppCompatActivity(), View.OnClickListener {
 
         fun open(
             activity: ActMain,
+            showDescription: Boolean,
             serviceType: ServiceType,
             list: ArrayList<TootAttachmentLike>,
             idx: Int,
@@ -82,6 +84,7 @@ class ActMediaViewer : AppCompatActivity(), View.OnClickListener {
             intent.putExtra(EXTRA_IDX, idx)
             intent.putExtra(EXTRA_SERVICE_TYPE, serviceType.ordinal)
             intent.putExtra(EXTRA_DATA, encodeMediaList(list))
+            intent.putExtra(EXTRA_SHOW_DESCRIPTION, showDescription)
             activity.startActivity(intent)
             activity.overridePendingTransition(R.anim.slide_from_bottom, android.R.anim.fade_out)
         }
@@ -90,6 +93,7 @@ class ActMediaViewer : AppCompatActivity(), View.OnClickListener {
     internal var idx: Int = 0
     private lateinit var mediaList: ArrayList<TootAttachment>
     private lateinit var serviceType: ServiceType
+    private var showDescription = true
 
     private lateinit var pbvImage: PinchBitmapView
     private lateinit var btnPrevious: View
@@ -175,6 +179,8 @@ class ActMediaViewer : AppCompatActivity(), View.OnClickListener {
 
         val intent = intent
 
+        this.showDescription = intent.getBooleanExtra(EXTRA_SHOW_DESCRIPTION, showDescription)
+
         this.idx = savedInstanceState?.getInt(EXTRA_IDX) ?: intent.getIntExtra(EXTRA_IDX, idx)
 
         this.serviceType = ServiceType.values()[
@@ -303,7 +309,7 @@ class ActMediaViewer : AppCompatActivity(), View.OnClickListener {
         }
         val ta = mediaList[idx]
         val description = ta.description
-        if (description?.isNotEmpty() == true) {
+        if (showDescription && description?.isNotEmpty() == true) {
             svDescription.visibility = View.VISIBLE
             tvDescription.text = description
         }
diff --git a/app/src/main/java/jp/juggler/subwaytooter/ActPost.kt b/app/src/main/java/jp/juggler/subwaytooter/ActPost.kt
index 7d5b3e1a..4ede29cd 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/ActPost.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/ActPost.kt
@@ -19,6 +19,7 @@ import jp.juggler.subwaytooter.actpost.*
 import jp.juggler.subwaytooter.api.*
 import jp.juggler.subwaytooter.api.entity.*
 import jp.juggler.subwaytooter.dialog.*
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.subwaytooter.span.MyClickableSpan
 import jp.juggler.subwaytooter.span.MyClickableSpanHandler
 import jp.juggler.subwaytooter.table.SavedAccount
diff --git a/app/src/main/java/jp/juggler/subwaytooter/App1.kt b/app/src/main/java/jp/juggler/subwaytooter/App1.kt
index 37e09a36..55d61157 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/App1.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/App1.kt
@@ -21,6 +21,9 @@ import com.bumptech.glide.load.model.GlideUrl
 import jp.juggler.subwaytooter.api.TootApiClient
 import jp.juggler.subwaytooter.column.ColumnType
 import jp.juggler.subwaytooter.emoji.EmojiMap
+import jp.juggler.subwaytooter.pref.PrefI
+import jp.juggler.subwaytooter.pref.PrefS
+import jp.juggler.subwaytooter.pref.pref
 import jp.juggler.subwaytooter.table.*
 import jp.juggler.subwaytooter.util.CustomEmojiCache
 import jp.juggler.subwaytooter.util.CustomEmojiLister
diff --git a/app/src/main/java/jp/juggler/subwaytooter/MyFirebaseMessagingService.kt b/app/src/main/java/jp/juggler/subwaytooter/MyFirebaseMessagingService.kt
index 941dee54..7e8e5e5d 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/MyFirebaseMessagingService.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/MyFirebaseMessagingService.kt
@@ -7,6 +7,7 @@ import com.google.firebase.messaging.FirebaseMessagingService
 import com.google.firebase.messaging.RemoteMessage
 import jp.juggler.subwaytooter.notification.PollingForegrounder
 import jp.juggler.subwaytooter.notification.PollingWorker
+import jp.juggler.subwaytooter.pref.PrefDevice
 
 import jp.juggler.util.LogCategory
 
diff --git a/app/src/main/java/jp/juggler/subwaytooter/Pref.kt b/app/src/main/java/jp/juggler/subwaytooter/Pref.kt
deleted file mode 100644
index 3cdd909e..00000000
--- a/app/src/main/java/jp/juggler/subwaytooter/Pref.kt
+++ /dev/null
@@ -1,654 +0,0 @@
-package jp.juggler.subwaytooter
-
-import android.content.Context
-import android.content.SharedPreferences
-import android.graphics.Color
-import jp.juggler.subwaytooter.itemviewholder.AdditionalButtonsPosition
-import jp.juggler.util.optInt
-
-fun Context.pref(): SharedPreferences =
-    this.getSharedPreferences(this.packageName + "_preferences", Context.MODE_PRIVATE)
-
-@Suppress("EqualsOrHashCode")
-abstract class BasePref<T>(val key: String, val defVal: T) {
-
-    companion object {
-        // キー名と設定項目のマップ。インポートやアプリ設定で使う
-        val allPref = HashMap<String, BasePref<*>>()
-    }
-
-    init {
-        when {
-            allPref[key] != null -> error("Preference key duplicate: $key")
-            else -> {
-                @Suppress("LeakingThis")
-                allPref[key] = this
-            }
-        }
-    }
-
-    abstract fun put(editor: SharedPreferences.Editor, v: T)
-    abstract operator fun invoke(pref: SharedPreferences): T
-
-    override fun equals(other: Any?) =
-        this === other
-
-    override fun hashCode(): Int = key.hashCode()
-
-    operator fun invoke(context: Context): T =
-        invoke(context.pref())
-
-    fun remove(e: SharedPreferences.Editor): SharedPreferences.Editor =
-        e.remove(key)
-
-    fun removeDefault(pref: SharedPreferences, e: SharedPreferences.Editor) =
-        if (pref.contains(key) && this.invoke(pref) == defVal) {
-            e.remove(key)
-            true
-        } else {
-            false
-        }
-}
-
-fun SharedPreferences.Editor.remove(item: BasePref<*>): SharedPreferences.Editor {
-    item.remove(this)
-    return this
-}
-
-class BooleanPref(key: String, defVal: Boolean) : BasePref<Boolean>(key, defVal) {
-
-    override operator fun invoke(pref: SharedPreferences): Boolean =
-        pref.getBoolean(key, defVal)
-
-    // put if value is not default, remove if value is same to default
-    override fun put(editor: SharedPreferences.Editor, v: Boolean) {
-        if (v == defVal) editor.remove(key) else editor.putBoolean(key, v)
-    }
-}
-
-class IntPref(key: String, defVal: Int) : BasePref<Int>(key, defVal) {
-
-    override operator fun invoke(pref: SharedPreferences): Int =
-        pref.getInt(key, defVal)
-
-    override fun put(editor: SharedPreferences.Editor, v: Int) {
-        if (v == defVal) editor.remove(key) else editor.putInt(key, v)
-    }
-}
-
-class LongPref(key: String, defVal: Long) : BasePref<Long>(key, defVal) {
-
-    override operator fun invoke(pref: SharedPreferences): Long =
-        pref.getLong(key, defVal)
-
-    override fun put(editor: SharedPreferences.Editor, v: Long) {
-        if (v == defVal) editor.remove(key) else editor.putLong(key, v)
-    }
-}
-
-class FloatPref(key: String, defVal: Float) : BasePref<Float>(key, defVal) {
-
-    override operator fun invoke(pref: SharedPreferences): Float =
-        pref.getFloat(key, defVal)
-
-    override fun put(editor: SharedPreferences.Editor, v: Float) {
-        if (v == defVal) editor.remove(key) else editor.putFloat(key, v)
-    }
-}
-
-class StringPref(
-    key: String,
-    defVal: String,
-    val skipImport: Boolean = false,
-) : BasePref<String>(key, defVal) {
-
-    override operator fun invoke(pref: SharedPreferences): String =
-        pref.getString(key, defVal) ?: defVal
-
-    override fun put(editor: SharedPreferences.Editor, v: String) {
-        if (v == defVal) editor.remove(key) else editor.putString(key, v)
-    }
-
-    fun toInt(pref: SharedPreferences) = invoke(pref).optInt() ?: defVal.toInt()
-}
-
-fun SharedPreferences.Editor.put(item: BooleanPref, v: Boolean) =
-    this.apply { item.put(this, v) }
-
-fun SharedPreferences.Editor.put(item: StringPref, v: String) =
-    this.apply { item.put(this, v) }
-
-fun SharedPreferences.Editor.put(item: IntPref, v: Int) =
-    this.apply { item.put(this, v) }
-
-fun SharedPreferences.Editor.put(item: LongPref, v: Long) =
-    this.apply { item.put(this, v) }
-
-fun SharedPreferences.Editor.put(item: FloatPref, v: Float) =
-    this.apply { item.put(this, v) }
-
-object PrefB {
-    // boolean
-
-    val bpDisableEmojiAnimation = BooleanPref(
-        "disable_emoji_animation",
-        false
-    )
-
-    // val bpDisableFastScroller = BooleanPref("disable_fast_scroller", true, 0) // R.id.swDisableFastScroller)
-
-    val bpDisableTabletMode = BooleanPref(
-        "disable_tablet_mode",
-        false
-    )
-
-    val bpDontConfirmBeforeCloseColumn = BooleanPref(
-        "DontConfirmBeforeCloseColumn",
-        false
-    )
-
-    val bpDontCropMediaThumb = BooleanPref(
-        "DontCropMediaThumb",
-        true
-    )
-
-    val bpDontDuplicationCheck = BooleanPref(
-        "dont_duplication_check",
-        false
-    )
-
-    val bpDontRefreshOnResume = BooleanPref(
-        "dont_refresh_on_resume",
-        false
-    )
-
-    val bpDontRound = BooleanPref(
-        "dont_round",
-        false
-    )
-
-    val bpDontScreenOff = BooleanPref(
-        "dont_screen_off",
-        false
-    )
-
-    val bpDontUseActionButtonWithQuickPostBar = BooleanPref(
-        "dont_use_action_button",
-        false
-    )
-
-    val bpDontUseStreaming = BooleanPref(
-        "dont_use_streaming",
-        false
-    )
-
-    val bpEnableGifAnimation = BooleanPref(
-        "enable_gif_animation",
-        false
-    )
-
-    val bpExitAppWhenCloseProtectedColumn = BooleanPref(
-        "ExitAppWhenCloseProtectedColumn",
-        false
-    )
-
-    val bpMentionFullAcct = BooleanPref(
-        "mention_full_acct",
-        false
-    )
-
-    val bpNotificationLED = BooleanPref(
-        "notification_led",
-        true
-    )
-
-    val bpNotificationSound = BooleanPref(
-        "notification_sound",
-        true
-    )
-
-    val bpNotificationVibration = BooleanPref(
-        "notification_vibration",
-        true
-    )
-
-    val bpPostButtonBarTop = BooleanPref(
-        "post_button_bar_at_top",
-        true
-    )
-
-    val bpPriorChrome = BooleanPref(
-        "prior_chrome",
-        true
-    )
-    val bpDontUseCustomTabs = BooleanPref(
-        "DontUseCustomTabs",
-        false
-    )
-    val bpPriorLocalURL = BooleanPref(
-        "prior_local_url",
-        false
-    )
-
-    val bpQuickPostBar = BooleanPref(
-        "quick_toot_bar",
-        false
-    )
-
-    val bpRelativeTimestamp = BooleanPref(
-        "relative_timestamp",
-        true
-    )
-
-    val bpShortAcctLocalUser = BooleanPref(
-        "short_acct_local_user",
-        true
-    )
-
-    val bpShowFollowButtonInButtonBar = BooleanPref(
-        "ShowFollowButtonInButtonBar",
-        false
-    )
-
-    val bpSimpleList = BooleanPref(
-        "simple_list",
-        true
-    )
-
-    val bpUseInternalMediaViewer = BooleanPref(
-        "use_internal_media_viewer",
-        true
-    )
-
-    val bpShowAppName = BooleanPref(
-        "show_app_name",
-        false
-    )
-    val bpShowLanguage = BooleanPref(
-        "ShowLanguage",
-        false
-    )
-    val bpForceGap = BooleanPref(
-        "force_gap",
-        false
-    )
-
-    val bpShareViewPool = BooleanPref(
-        "ShareViewPool",
-        true
-    )
-
-    val bpAllowColumnDuplication = BooleanPref(
-        "AllowColumnDuplication",
-        true
-    )
-
-    val bpAppendAttachmentUrlToContent = BooleanPref(
-        "AppendAttachmentUrlToContent",
-        false
-    )
-
-    val bpVerticalArrangeThumbnails = BooleanPref(
-        "VerticalArrangeThumbnails",
-        false
-    )
-
-    val bpDontShowPreviewCard = BooleanPref(
-        "DontShowPreviewCard",
-        false
-    )
-
-    val bpScrollTopFromColumnStrip = BooleanPref(
-        "ScrollTopFromColumnStrip",
-        false
-    )
-
-    val bpOpenSticker = BooleanPref(
-        "InstanceTicker", // 歴史的な理由でキー名が異なる
-        false
-    )
-
-    val bpLinksInContextMenu = BooleanPref(
-        "LinksInContextMenu",
-        false
-    )
-    val bpMoveNotificationsQuickFilter = BooleanPref(
-        "MoveNotificationsQuickFilter",
-        false
-    )
-    val bpShowAcctInSystemNotification = BooleanPref(
-        "ShowAcctInSystemNotification",
-        false
-    )
-    val bpShowLinkUnderline = BooleanPref(
-        "ShowLinkUnderline",
-        false
-    )
-
-    val bpShowSearchClear = BooleanPref(
-        "ShowSearchClear",
-        false
-    )
-
-    val bpDontRemoveDeletedToot = BooleanPref(
-        "DontRemoveDeletedToot",
-        false
-    )
-
-    val bpDontShowColumnBackgroundImage = BooleanPref(
-        "DontShowColumnBackgroundImage",
-        false
-    )
-
-    val bpCustomEmojiSeparatorZwsp = BooleanPref(
-        "CustomEmojiSeparatorZwsp",
-        false
-    )
-
-    val bpShowTranslateButton = BooleanPref(
-        "ShowTranslateButton",
-        false
-    )
-
-    val bpDirectoryLastActive = BooleanPref(
-        "DirectoryLastActive",
-        true
-    )
-
-    val bpDirectoryFollowers = BooleanPref(
-        "DirectoryFollowers",
-        true
-    )
-
-    val bpDirectoryTootCount = BooleanPref(
-        "DirectoryTootCount",
-        true
-    )
-    val bpDirectoryNote = BooleanPref(
-        "DirectoryNote",
-        true
-    )
-
-    val bpWarnHashtagAsciiAndNonAscii = BooleanPref(
-        "WarnHashtagAsciiAndNonAscii",
-        false
-    )
-
-    val bpEnablePixelfed = BooleanPref(
-        "EnablePixelfed",
-        false
-    )
-
-    val bpQuickTootOmitAccountSelection = BooleanPref(
-        "QuickTootOmitAccountSelection",
-        false
-    )
-
-    val bpSeparateReplyNotificationGroup = BooleanPref(
-        "SeparateReplyNotificationGroup",
-        false
-    )
-
-    val bpAlwaysExpandContextMenuItems = BooleanPref(
-        "AlwaysExpandContextMenuItems",
-        false
-    )
-
-    val bpShowBookmarkButton = BooleanPref(
-        "ShowBookmarkButton2",
-        true
-    )
-
-    val bpShowFilteredWord = BooleanPref(
-        "ShowFilteredWord",
-        false
-    )
-
-    val bpEnableDomainTimeline = BooleanPref(
-        "EnableDomainTimeline",
-        false
-    )
-
-    val bpDivideNotification = BooleanPref(
-        "DivideNotification",
-        false
-    )
-
-    val bpHideFollowCount = BooleanPref(
-        "HideFollowCount",
-        false
-    )
-
-    val bpEmojioneShortcode = BooleanPref(
-        "EmojioneShortcode",
-        true
-    )
-
-    val bpEmojiPickerCloseOnSelected = BooleanPref(
-        "EmojiPickerCloseOnSelected",
-        true
-    )
-
-    val bpCheckBetaVersion = BooleanPref(
-        "CheckBetaVersion",
-        false
-    )
-
-    val bpIgnoreTextInSharedMedia = BooleanPref(
-        "IgnoreTextInSharedMedia",
-        false
-    )
-
-    val bpEmojiPickerCategoryOther = BooleanPref(
-        "EmojiPickerCategoryOther",
-        false
-    )
-
-    val bpInAppUnicodeEmoji = BooleanPref(
-        "InAppUnicodeEmoji",
-        true
-    )
-
-    val bpKeepReactionSpace = BooleanPref(
-        "KeepReactionSpace",
-        false
-    )
-
-    val bpMultiWindowPost = BooleanPref(
-        "MultiWindowPost",
-        false
-    )
-
-    val bpManyWindowPost = BooleanPref(
-        "ManyWindowPost",
-        false
-    )
-
-    val bpMfmDecorationEnabled = BooleanPref(
-        "MfmDecorationEnabled",
-        true
-    )
-    val bpMfmDecorationShowUnsupportedMarkup = BooleanPref(
-        "MfmDecorationShowUnsupportedMarkup",
-        true
-    )
-}
-
-object PrefI {
-    // int
-
-    val ipBackButtonAction = IntPref("back_button_action", 0)
-
-    @Suppress("unused")
-    const val BACK_ASK_ALWAYS = 0
-    const val BACK_CLOSE_COLUMN = 1
-    const val BACK_OPEN_COLUMN_LIST = 2
-    const val BACK_EXIT_APP = 3
-
-    val ipUiTheme = IntPref("ui_theme", 0)
-
-//	val ipResizeImage = IntPref("resize_image", 4)
-
-    const val RC_SIMPLE = 0
-    const val RC_ACTUAL = 1
-
-    @Suppress("unused")
-    const val RC_NONE = 2
-
-    val ipRepliesCount = IntPref("RepliesCount", RC_SIMPLE)
-    val ipBoostsCount = IntPref("BoostsCount", RC_ACTUAL)
-    val ipFavouritesCount = IntPref("FavouritesCount", RC_ACTUAL)
-
-    val ipRefreshAfterToot = IntPref("refresh_after_toot", 0)
-    const val RAT_REFRESH_SCROLL = 0
-
-    @Suppress("unused")
-    const val RAT_REFRESH_DONT_SCROLL = 1
-    const val RAT_DONT_REFRESH = 2
-
-    @Suppress("unused")
-    const val VS_BY_ACCOUNT = 0
-    const val VS_MASTODON = 1
-    const val VS_MISSKEY = 2
-    val ipVisibilityStyle = IntPref("ipVisibilityStyle", VS_BY_ACCOUNT)
-
-    val ipAdditionalButtonsPosition =
-        IntPref("AdditionalButtonsPosition", AdditionalButtonsPosition.End.idx)
-
-    val ipFooterButtonBgColor = IntPref("footer_button_bg_color", 0)
-    val ipFooterButtonFgColor = IntPref("footer_button_fg_color", 0)
-    val ipFooterTabBgColor = IntPref("footer_tab_bg_color", 0)
-    val ipFooterTabDividerColor = IntPref("footer_tab_divider_color", 0)
-    val ipFooterTabIndicatorColor = IntPref("footer_tab_indicator_color", 0)
-    val ipListDividerColor = IntPref("listDividerColor", 0)
-    val ipLastColumnPos = IntPref("last_column_pos", -1)
-    val ipBoostButtonJustify = IntPref("ipBoostButtonJustify", 0) // 0=左,1=中央,2=右
-
-    private const val JWCP_DEFAULT = 0
-    const val JWCP_START = 1
-    const val JWCP_END = 2
-    val ipJustifyWindowContentPortrait =
-        IntPref("JustifyWindowContentPortrait", JWCP_DEFAULT) // 0=default,1=start,2=end
-
-    const val GSP_HEAD = 0
-    private const val GSP_TAIL = 1
-    val ipGapHeadScrollPosition = IntPref("GapHeadScrollPosition", GSP_TAIL)
-    val ipGapTailScrollPosition = IntPref("GapTailScrollPosition", GSP_TAIL)
-
-    val ipLinkColor = IntPref("LinkColor", 0)
-
-    val ipSwitchOnColor = IntPref("SwitchOnColor", Color.BLACK or 0x0080ff)
-
-    val ipButtonBoostedColor = IntPref("ButtonBoostedColor", 0)
-    val ipButtonFavoritedColor = IntPref("ButtonFavoritedColor", 0)
-    val ipButtonBookmarkedColor = IntPref("ButtonBookmarkedColor", 0)
-    val ipButtonFollowingColor = IntPref("ButtonFollowingColor", 0)
-    val ipButtonFollowRequestColor = IntPref("ButtonFollowRequestColor", 0)
-    val ipButtonReactionedColor = IntPref("ButtonReactionedColor", 0)
-
-    val ipStatusBarColor = IntPref("StatusBarColor", 0)
-    val ipNavigationBarColor = IntPref("NavigationBarColor", 0)
-
-    val ipTootColorUnlisted = IntPref("ipTootColorUnlisted", 0)
-    val ipTootColorFollower = IntPref("ipTootColorFollower", 0)
-    val ipTootColorDirectUser = IntPref("ipTootColorDirectUser", 0)
-    val ipTootColorDirectMe = IntPref("ipTootColorDirectMe", 0)
-
-    val ipEventBgColorBoost = IntPref("EventBgColorBoost", 0)
-    val ipEventBgColorFavourite = IntPref("EventBgColorFavourite", 0)
-    val ipEventBgColorBookmark = IntPref("EventBgColorBookmark", 0)
-    val ipEventBgColorFollow = IntPref("EventBgColorFollow", 0)
-    val ipEventBgColorMention = IntPref("EventBgColorMention", 0)
-    val ipEventBgColorUnfollow = IntPref("EventBgColorUnfollow", 0)
-    val ipEventBgColorReaction = IntPref("EventBgColorReaction", 0)
-    val ipEventBgColorQuote = IntPref("EventBgColorQuote", 0)
-    val ipEventBgColorVote = IntPref("EventBgColorVote", 0)
-    val ipEventBgColorFollowRequest = IntPref("EventBgColorFollowRequest", 0)
-    val ipEventBgColorStatus = IntPref("EventBgColorStatus", 0)
-
-    val ipEventBgColorGap = IntPref("EventBgColorGap", 0)
-
-    val ipCcdHeaderBg = IntPref("ipCcdHeaderBg", 0)
-    val ipCcdHeaderFg = IntPref("ipCcdHeaderFg", 0)
-    val ipCcdContentBg = IntPref("ipCcdContentBg", 0)
-    val ipCcdContentAcct = IntPref("ipCcdContentAcct", 0)
-    val ipCcdContentText = IntPref("ipCcdContentText", 0)
-
-    val ipSearchBgColor = IntPref("SearchBgColor", 0)
-    val ipAnnouncementsBgColor = IntPref("AnnouncementsBgColor", 0)
-    val ipConversationMainTootBgColor = IntPref("ConversationMainTootBgColor", 0)
-    val ipVerifiedLinkBgColor = IntPref("VerifiedLinkBgColor", 0)
-    val ipVerifiedLinkFgColor = IntPref("VerifiedLinkFgColor", 0)
-
-    //	val ipTrendTagCountShowing = IntPref("TrendTagCountShowing", 0)
-    //	const val TTCS_WEEKLY = 0
-    //	const val TTCS_DAILY = 1
-}
-
-object PrefS {
-
-    // string
-    val spColumnWidth = StringPref("ColumnWidth", "")
-    val spMediaThumbHeight = StringPref("MediaThumbHeight", "")
-    val spClientName = StringPref("client_name", "")
-    val spQuoteNameFormat = StringPref("quote_name_format", "")
-    val spAutoCWLines = StringPref("auto_cw_lines", "0")
-    val spCardDescriptionLength = StringPref("CardDescriptionLength", "64")
-    val spAvatarIconSize = StringPref("avatar_icon_size", "48")
-    val spNotificationTlIconSize = StringPref("notification_tl_icon_size", "24")
-    val spBoostButtonSize = StringPref("BoostButtonSize", "35")
-    val spReplyIconSize = StringPref("ReplyIconSize", "24")
-    val spHeaderIconSize = StringPref("HeaderIconSize", "24")
-    val spStripIconSize = StringPref("StripIconSize", "30")
-
-    // val spMediaSizeMax = StringPref("max_media_size", "8")
-    // val spMovieSizeMax = StringPref("max_movie_size", "40")
-    // val spMediaSizeMaxPixelfed = StringPref("MediaSizeMaxPixelfed", "15")
-
-    val spTimelineFont = StringPref("timeline_font", "", skipImport = true)
-    val spTimelineFontBold = StringPref("timeline_font_bold", "", skipImport = true)
-    val spMspUserToken = StringPref("mastodon_search_portal_user_token", "")
-    val spEmojiPickerRecent = StringPref("emoji_picker_recent", "")
-    val spRoundRatio = StringPref("round_ratio", "33")
-    val spBoostAlpha = StringPref("BoostAlpha", "60")
-
-    val spScreenBottomPadding = StringPref("ScreenBottomPadding", "8")
-
-    val spPullNotificationCheckInterval = StringPref("PullNotificationCheckInterval", "15")
-    val spUserAgent = StringPref("UserAgent", "")
-
-    val spMediaReadTimeout = StringPref("spMediaReadTimeout", "60")
-    val spAgreedPrivacyPolicyDigest = StringPref("spAgreedPrivacyPolicyDigest", "")
-
-    val spTimeZone = StringPref("TimeZone", "")
-
-    val spQuickTootMacro = StringPref("QuickTootMacro", "")
-    val spQuickTootVisibility = StringPref("QuickTootVisibility", "")
-
-    val spTranslateAppComponent = StringPref("TranslateAppComponent", "")
-    val spCustomShare1 = StringPref("CustomShare1", "")
-    val spCustomShare2 = StringPref("CustomShare2", "")
-    val spCustomShare3 = StringPref("CustomShare3", "")
-    // val spWebBrowser = StringPref("WebBrowser", "")
-
-    val spTimelineSpacing = StringPref("TimelineSpacing", "")
-}
-
-object PrefL {
-
-    // long
-    val lpTabletTootDefaultAccount = LongPref("tablet_toot_default_account", -1L)
-}
-
-object PrefF {
-    // float
-
-    val fpTimelineFontSize = FloatPref("timeline_font_size", Float.NaN)
-    val fpAcctFontSize = FloatPref("acct_font_size", Float.NaN)
-    val fpNotificationTlFontSize = FloatPref("notification_tl_font_size", Float.NaN)
-    val fpHeaderTextSize = FloatPref("HeaderTextSize", Float.NaN)
-    internal const val default_timeline_font_size = 14f
-    internal const val default_acct_font_size = 12f
-    internal const val default_notification_tl_font_size = 14f
-    internal const val default_header_font_size = 14f
-}
diff --git a/app/src/main/java/jp/juggler/subwaytooter/Styler.kt b/app/src/main/java/jp/juggler/subwaytooter/Styler.kt
index b890ba5b..685054a3 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/Styler.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/Styler.kt
@@ -15,6 +15,8 @@ import androidx.core.content.ContextCompat
 import jp.juggler.subwaytooter.emoji.EmojiMap
 import jp.juggler.subwaytooter.api.entity.TootAccount
 import jp.juggler.subwaytooter.api.entity.TootVisibility
+import jp.juggler.subwaytooter.pref.PrefI
+import jp.juggler.subwaytooter.pref.pref
 import jp.juggler.subwaytooter.span.EmojiImageSpan
 import jp.juggler.subwaytooter.span.createSpan
 import jp.juggler.subwaytooter.table.UserRelation
diff --git a/app/src/main/java/jp/juggler/subwaytooter/action/Action_Account.kt b/app/src/main/java/jp/juggler/subwaytooter/action/Action_Account.kt
index a82708b2..7045d59d 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/action/Action_Account.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/action/Action_Account.kt
@@ -13,6 +13,7 @@ import jp.juggler.subwaytooter.api.entity.*
 import jp.juggler.subwaytooter.column.ColumnType
 import jp.juggler.subwaytooter.dialog.*
 import jp.juggler.subwaytooter.notification.PollingWorker
+import jp.juggler.subwaytooter.pref.*
 import jp.juggler.subwaytooter.table.SavedAccount
 import jp.juggler.subwaytooter.util.LinkHelper
 import jp.juggler.subwaytooter.util.openBrowser
diff --git a/app/src/main/java/jp/juggler/subwaytooter/action/Action_OpenPost.kt b/app/src/main/java/jp/juggler/subwaytooter/action/Action_OpenPost.kt
index 6fb13e10..f711c7eb 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/action/Action_OpenPost.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/action/Action_OpenPost.kt
@@ -16,6 +16,9 @@ import jp.juggler.subwaytooter.api.entity.TootStatus
 import jp.juggler.subwaytooter.api.runApiTask
 import jp.juggler.subwaytooter.api.syncStatus
 import jp.juggler.subwaytooter.dialog.pickAccount
+import jp.juggler.subwaytooter.pref.PrefB
+import jp.juggler.subwaytooter.pref.PrefDevice
+import jp.juggler.subwaytooter.pref.PrefS
 import jp.juggler.subwaytooter.table.SavedAccount
 import jp.juggler.subwaytooter.util.matchHost
 import jp.juggler.util.LogCategory
diff --git a/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainAccount.kt b/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainAccount.kt
index 444a8442..a6d161bd 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainAccount.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainAccount.kt
@@ -2,7 +2,7 @@ package jp.juggler.subwaytooter.actmain
 
 import jp.juggler.subwaytooter.ActMain
 import jp.juggler.subwaytooter.App1
-import jp.juggler.subwaytooter.PrefL
+import jp.juggler.subwaytooter.pref.PrefL
 import jp.juggler.subwaytooter.column.fireShowColumnHeader
 import jp.juggler.subwaytooter.table.SavedAccount
 import java.util.ArrayList
diff --git a/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainActions.kt b/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainActions.kt
index 8db99563..35fefc88 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainActions.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainActions.kt
@@ -5,8 +5,8 @@ import android.view.View
 import android.widget.TextView
 import androidx.core.view.GravityCompat
 import jp.juggler.subwaytooter.ActMain
-import jp.juggler.subwaytooter.PrefB
-import jp.juggler.subwaytooter.PrefI
+import jp.juggler.subwaytooter.pref.PrefB
+import jp.juggler.subwaytooter.pref.PrefI
 import jp.juggler.subwaytooter.R
 import jp.juggler.subwaytooter.action.openColumnList
 import jp.juggler.subwaytooter.action.openPost
diff --git a/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainAfterPost.kt b/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainAfterPost.kt
index 8083e4e4..c4d8ef7d 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainAfterPost.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainAfterPost.kt
@@ -3,7 +3,7 @@ package jp.juggler.subwaytooter.actmain
 import android.content.Intent
 import jp.juggler.subwaytooter.ActMain
 import jp.juggler.subwaytooter.ActPost
-import jp.juggler.subwaytooter.PrefI
+import jp.juggler.subwaytooter.pref.PrefI
 import jp.juggler.subwaytooter.api.entity.Acct
 import jp.juggler.subwaytooter.api.entity.EntityId
 import jp.juggler.subwaytooter.column.ColumnType
diff --git a/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainAutoCW.kt b/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainAutoCW.kt
index 24f5ef3f..c99c85fa 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainAutoCW.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainAutoCW.kt
@@ -5,7 +5,7 @@ import android.view.View
 import android.widget.LinearLayout
 import android.widget.TextView
 import jp.juggler.subwaytooter.ActMain
-import jp.juggler.subwaytooter.PrefS
+import jp.juggler.subwaytooter.pref.PrefS
 import jp.juggler.subwaytooter.R
 import jp.juggler.subwaytooter.api.entity.TootStatus
 import jp.juggler.util.optInt
diff --git a/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainColumns.kt b/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainColumns.kt
index b8d68499..20d8ea9f 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainColumns.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainColumns.kt
@@ -12,6 +12,9 @@ import jp.juggler.subwaytooter.column.*
 import jp.juggler.subwaytooter.columnviewholder.TabletColumnViewHolder
 import jp.juggler.subwaytooter.columnviewholder.scrollToTop2
 import jp.juggler.subwaytooter.columnviewholder.showColumnSetting
+import jp.juggler.subwaytooter.pref.PrefB
+import jp.juggler.subwaytooter.pref.PrefI
+import jp.juggler.subwaytooter.pref.PrefS
 import jp.juggler.subwaytooter.table.AcctColor
 import jp.juggler.subwaytooter.table.SavedAccount
 import jp.juggler.util.*
diff --git a/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainIntent.kt b/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainIntent.kt
index 37479ec4..7b7fed06 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainIntent.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainIntent.kt
@@ -6,8 +6,8 @@ import android.net.Uri
 import android.os.Build
 import androidx.appcompat.app.AlertDialog
 import jp.juggler.subwaytooter.ActMain
-import jp.juggler.subwaytooter.PrefDevice
-import jp.juggler.subwaytooter.PrefS
+import jp.juggler.subwaytooter.pref.PrefDevice
+import jp.juggler.subwaytooter.pref.PrefS
 import jp.juggler.subwaytooter.R
 import jp.juggler.subwaytooter.action.conversationOtherInstance
 import jp.juggler.subwaytooter.action.openActPostImpl
diff --git a/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainQuickPost.kt b/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainQuickPost.kt
index 8c93104c..67a21974 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainQuickPost.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainQuickPost.kt
@@ -11,6 +11,7 @@ import jp.juggler.subwaytooter.api.entity.TootVisibility
 import jp.juggler.subwaytooter.dialog.pickAccount
 import jp.juggler.subwaytooter.table.SavedAccount
 import jp.juggler.subwaytooter.actpost.CompletionHelper
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.subwaytooter.util.PostCompleteCallback
 import jp.juggler.subwaytooter.util.PostImpl
 import jp.juggler.util.hideKeyboard
diff --git a/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainStyle.kt b/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainStyle.kt
index de8cba91..e7a21762 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainStyle.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainStyle.kt
@@ -8,6 +8,8 @@ import android.widget.LinearLayout
 import jp.juggler.subwaytooter.*
 import jp.juggler.subwaytooter.api.entity.TootStatus
 import jp.juggler.subwaytooter.itemviewholder.ItemViewHolder
+import jp.juggler.subwaytooter.pref.*
+import jp.juggler.subwaytooter.pref.impl.StringPref
 import jp.juggler.subwaytooter.span.MyClickableSpan
 import jp.juggler.subwaytooter.util.CustomShare
 import jp.juggler.subwaytooter.view.ListDivider
diff --git a/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainSwitchUI.kt b/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainSwitchUI.kt
index c8f45131..4b73137b 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainSwitchUI.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/actmain/ActMainSwitchUI.kt
@@ -3,7 +3,7 @@ package jp.juggler.subwaytooter.actmain
 import android.view.View
 import androidx.recyclerview.widget.RecyclerView
 import jp.juggler.subwaytooter.ActMain
-import jp.juggler.subwaytooter.PrefB
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.subwaytooter.R
 import jp.juggler.subwaytooter.view.MyViewPager
 
diff --git a/app/src/main/java/jp/juggler/subwaytooter/actmain/SideMenuAdapter.kt b/app/src/main/java/jp/juggler/subwaytooter/actmain/SideMenuAdapter.kt
index dab31bde..73341030 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/actmain/SideMenuAdapter.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/actmain/SideMenuAdapter.kt
@@ -24,6 +24,7 @@ import jp.juggler.subwaytooter.action.*
 import jp.juggler.subwaytooter.api.entity.TootStatus
 import jp.juggler.subwaytooter.column.ColumnType
 import jp.juggler.subwaytooter.dialog.pickAccount
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.subwaytooter.table.SavedAccount
 import jp.juggler.subwaytooter.util.VersionString
 import jp.juggler.subwaytooter.util.openBrowser
diff --git a/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostAttachment.kt b/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostAttachment.kt
index b0315a69..72b4560e 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostAttachment.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostAttachment.kt
@@ -5,7 +5,7 @@ import android.net.Uri
 import android.view.View
 import androidx.appcompat.app.AlertDialog
 import jp.juggler.subwaytooter.ActPost
-import jp.juggler.subwaytooter.PrefB
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.subwaytooter.R
 import jp.juggler.subwaytooter.Styler
 import jp.juggler.subwaytooter.api.ApiTask
diff --git a/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostExtra.kt b/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostExtra.kt
index 4157812f..72bc0cbe 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostExtra.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/actpost/ActPostExtra.kt
@@ -9,6 +9,7 @@ import jp.juggler.subwaytooter.*
 import jp.juggler.subwaytooter.actmain.onCompleteActPost
 import jp.juggler.subwaytooter.api.entity.*
 import jp.juggler.subwaytooter.dialog.ActionsDialog
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.subwaytooter.table.PostDraft
 import jp.juggler.subwaytooter.table.SavedAccount
 import jp.juggler.subwaytooter.util.*
diff --git a/app/src/main/java/jp/juggler/subwaytooter/actpost/CompletionHelper.kt b/app/src/main/java/jp/juggler/subwaytooter/actpost/CompletionHelper.kt
index 86b1a680..0f50f753 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/actpost/CompletionHelper.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/actpost/CompletionHelper.kt
@@ -7,7 +7,7 @@ import android.text.style.ForegroundColorSpan
 import android.view.View
 import androidx.appcompat.app.AppCompatActivity
 import jp.juggler.subwaytooter.App1
-import jp.juggler.subwaytooter.PrefB
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.subwaytooter.R
 import jp.juggler.subwaytooter.api.*
 import jp.juggler.subwaytooter.api.entity.*
diff --git a/app/src/main/java/jp/juggler/subwaytooter/api/TootApiClient.kt b/app/src/main/java/jp/juggler/subwaytooter/api/TootApiClient.kt
index fdbc7a36..6c1504c4 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/api/TootApiClient.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/api/TootApiClient.kt
@@ -3,6 +3,8 @@ package jp.juggler.subwaytooter.api
 import android.content.Context
 import jp.juggler.subwaytooter.*
 import jp.juggler.subwaytooter.api.entity.*
+import jp.juggler.subwaytooter.pref.PrefDevice
+import jp.juggler.subwaytooter.pref.pref
 import jp.juggler.subwaytooter.table.ClientInfo
 import jp.juggler.subwaytooter.table.SavedAccount
 import jp.juggler.subwaytooter.util.*
diff --git a/app/src/main/java/jp/juggler/subwaytooter/api/entity/TootAccount.kt b/app/src/main/java/jp/juggler/subwaytooter/api/entity/TootAccount.kt
index 02be8041..328ca19b 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/api/entity/TootAccount.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/api/entity/TootAccount.kt
@@ -5,7 +5,7 @@ import android.text.Spannable
 import android.text.SpannableStringBuilder
 import android.widget.TextView
 import jp.juggler.subwaytooter.App1
-import jp.juggler.subwaytooter.PrefB
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.subwaytooter.R
 import jp.juggler.subwaytooter.api.MisskeyAccountDetailMap
 import jp.juggler.subwaytooter.api.TootParser
diff --git a/app/src/main/java/jp/juggler/subwaytooter/api/entity/TootAttachment.kt b/app/src/main/java/jp/juggler/subwaytooter/api/entity/TootAttachment.kt
index 61537f57..50cfa47e 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/api/entity/TootAttachment.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/api/entity/TootAttachment.kt
@@ -1,7 +1,7 @@
 package jp.juggler.subwaytooter.api.entity
 
 import android.content.SharedPreferences
-import jp.juggler.subwaytooter.PrefB
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.subwaytooter.api.TootParser
 import jp.juggler.util.*
 
diff --git a/app/src/main/java/jp/juggler/subwaytooter/api/entity/TootCard.kt b/app/src/main/java/jp/juggler/subwaytooter/api/entity/TootCard.kt
index d93afcf9..74719234 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/api/entity/TootCard.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/api/entity/TootCard.kt
@@ -1,7 +1,7 @@
 package jp.juggler.subwaytooter.api.entity
 
 import jp.juggler.subwaytooter.api.TootParser
-import jp.juggler.subwaytooter.pref
+import jp.juggler.subwaytooter.pref.pref
 import jp.juggler.subwaytooter.util.DecodeOptions
 import jp.juggler.util.JsonObject
 import jp.juggler.util.filterNotEmpty
diff --git a/app/src/main/java/jp/juggler/subwaytooter/api/entity/TootInstance.kt b/app/src/main/java/jp/juggler/subwaytooter/api/entity/TootInstance.kt
index 40f1df2d..49bffa57 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/api/entity/TootInstance.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/api/entity/TootInstance.kt
@@ -2,7 +2,7 @@ package jp.juggler.subwaytooter.api.entity
 
 import android.os.SystemClock
 import jp.juggler.subwaytooter.App1
-import jp.juggler.subwaytooter.PrefB
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.subwaytooter.api.TootApiClient
 import jp.juggler.subwaytooter.api.TootApiResult
 import jp.juggler.subwaytooter.api.TootParser
diff --git a/app/src/main/java/jp/juggler/subwaytooter/api/entity/TootReaction.kt b/app/src/main/java/jp/juggler/subwaytooter/api/entity/TootReaction.kt
index c9fb4d2d..82cbef9c 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/api/entity/TootReaction.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/api/entity/TootReaction.kt
@@ -4,7 +4,7 @@ import android.text.Spannable
 import android.text.SpannableStringBuilder
 import jp.juggler.subwaytooter.App1
 import jp.juggler.subwaytooter.columnviewholder.ColumnViewHolder
-import jp.juggler.subwaytooter.PrefB
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.subwaytooter.span.NetworkEmojiSpan
 import jp.juggler.subwaytooter.table.SavedAccount
 import jp.juggler.subwaytooter.util.DecodeOptions
diff --git a/app/src/main/java/jp/juggler/subwaytooter/api/entity/TootStatus.kt b/app/src/main/java/jp/juggler/subwaytooter/api/entity/TootStatus.kt
index 349d4e61..f64a4dea 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/api/entity/TootStatus.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/api/entity/TootStatus.kt
@@ -6,7 +6,7 @@ import androidx.annotation.StringRes
 import android.text.Spannable
 import android.text.SpannableString
 import jp.juggler.subwaytooter.App1
-import jp.juggler.subwaytooter.PrefB
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.subwaytooter.R
 import jp.juggler.subwaytooter.api.*
 import jp.juggler.subwaytooter.emoji.CustomEmoji
diff --git a/app/src/main/java/jp/juggler/subwaytooter/appsetting/AppDataExporter.kt b/app/src/main/java/jp/juggler/subwaytooter/appsetting/AppDataExporter.kt
index a2f0a608..f7177e7b 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/appsetting/AppDataExporter.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/appsetting/AppDataExporter.kt
@@ -16,6 +16,8 @@ import jp.juggler.subwaytooter.api.entity.EntityId
 import jp.juggler.subwaytooter.column.Column
 import jp.juggler.subwaytooter.column.ColumnEncoder
 import jp.juggler.subwaytooter.column.getBackgroundImageDir
+import jp.juggler.subwaytooter.pref.*
+import jp.juggler.subwaytooter.pref.impl.*
 import jp.juggler.subwaytooter.table.*
 import jp.juggler.util.*
 import org.apache.commons.io.IOUtils
diff --git a/app/src/main/java/jp/juggler/subwaytooter/appsetting/AppSettingItem.kt b/app/src/main/java/jp/juggler/subwaytooter/appsetting/AppSettingItem.kt
index e18b4bba..a60ed20b 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/appsetting/AppSettingItem.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/appsetting/AppSettingItem.kt
@@ -11,6 +11,8 @@ import androidx.annotation.StringRes
 import androidx.appcompat.widget.AppCompatImageView
 import jp.juggler.subwaytooter.*
 import jp.juggler.subwaytooter.itemviewholder.AdditionalButtonsPosition
+import jp.juggler.subwaytooter.pref.*
+import jp.juggler.subwaytooter.pref.impl.*
 import jp.juggler.subwaytooter.util.CustomShareTarget
 import jp.juggler.subwaytooter.util.openBrowser
 import jp.juggler.util.*
diff --git a/app/src/main/java/jp/juggler/subwaytooter/column/Column.kt b/app/src/main/java/jp/juggler/subwaytooter/column/Column.kt
index e7a5d5ae..98af1e7d 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/column/Column.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/column/Column.kt
@@ -8,6 +8,7 @@ import jp.juggler.subwaytooter.*
 import jp.juggler.subwaytooter.api.*
 import jp.juggler.subwaytooter.api.entity.*
 import jp.juggler.subwaytooter.columnviewholder.ColumnViewHolder
+import jp.juggler.subwaytooter.pref.PrefI
 import jp.juggler.subwaytooter.streaming.*
 import jp.juggler.subwaytooter.table.*
 import jp.juggler.subwaytooter.util.BucketList
@@ -133,6 +134,8 @@ class Column(
 
     internal var quickFilter = QUICK_FILTER_ALL
 
+    internal var showMediaDescription = true
+
     @Volatile
     internal var dontStreaming = false
 
diff --git a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnEncoder.kt b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnEncoder.kt
index a5276256..aa4d9c28 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnEncoder.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnEncoder.kt
@@ -18,6 +18,7 @@ object ColumnEncoder {
     const val KEY_ACCOUNT_ROW_ID = "account_id"
     const val KEY_TYPE = "type"
     const val KEY_DONT_CLOSE = "dont_close"
+    const val KEY_SHOW_MEDIA_DESCRIPTION = "showMediaDescription"
 
     private const val KEY_COLUMN_ID = "column_id"
     private const val KEY_WITH_ATTACHMENT = "with_attachment"
@@ -120,6 +121,7 @@ object ColumnEncoder {
             dst[KEY_ANNOUNCEMENT_HIDE_TIME] = announcementHideTime
 
             dst.putIfTrue(KEY_DONT_CLOSE, dontClose)
+            dst.putIfTrue(KEY_SHOW_MEDIA_DESCRIPTION, showMediaDescription)
             dst.putIfTrue(KEY_WITH_ATTACHMENT, withAttachment)
             dst.putIfTrue(KEY_WITH_HIGHLIGHT, withHighlight)
             dst.putIfTrue(KEY_DONT_SHOW_BOOST, dontShowBoost)
@@ -249,6 +251,7 @@ object ColumnEncoder {
     fun decode(column: Column, src: JsonObject) {
         column.run {
             dontClose = src.optBoolean(KEY_DONT_CLOSE)
+            showMediaDescription = src.optBoolean(KEY_SHOW_MEDIA_DESCRIPTION,true)
             withAttachment = src.optBoolean(KEY_WITH_ATTACHMENT)
             withHighlight = src.optBoolean(KEY_WITH_HIGHLIGHT)
             dontShowBoost = src.optBoolean(KEY_DONT_SHOW_BOOST)
diff --git a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnExtra1.kt b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnExtra1.kt
index ffa940a8..a42d263f 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnExtra1.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnExtra1.kt
@@ -7,6 +7,7 @@ import jp.juggler.subwaytooter.api.entity.EntityId
 import jp.juggler.subwaytooter.api.entity.TimelineItem
 import jp.juggler.subwaytooter.api.entity.TootStatus
 import jp.juggler.subwaytooter.columnviewholder.ColumnViewHolder
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.util.LogCategory
 import jp.juggler.util.getAdaptiveRippleDrawable
 import jp.juggler.util.notZero
diff --git a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnTask_Gap.kt b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnTask_Gap.kt
index 1636faa1..adc24e06 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnTask_Gap.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnTask_Gap.kt
@@ -8,6 +8,7 @@ import jp.juggler.subwaytooter.api.finder.*
 import jp.juggler.subwaytooter.columnviewholder.getListItemOffset
 import jp.juggler.subwaytooter.columnviewholder.setListItemTop
 import jp.juggler.subwaytooter.notification.PollingWorker
+import jp.juggler.subwaytooter.pref.PrefI
 import jp.juggler.util.*
 import java.lang.StringBuilder
 
diff --git a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnTask_Loading.kt b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnTask_Loading.kt
index 6cc7ec90..aaa82e3b 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnTask_Loading.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnTask_Loading.kt
@@ -1,7 +1,7 @@
 package jp.juggler.subwaytooter.column
 
 import android.os.SystemClock
-import jp.juggler.subwaytooter.PrefB
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.subwaytooter.R
 import jp.juggler.subwaytooter.api.*
 import jp.juggler.subwaytooter.api.entity.*
diff --git a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnTask_Refresh.kt b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnTask_Refresh.kt
index cc9d58c7..6e77625f 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/column/ColumnTask_Refresh.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/column/ColumnTask_Refresh.kt
@@ -6,6 +6,8 @@ import jp.juggler.subwaytooter.api.*
 import jp.juggler.subwaytooter.api.entity.*
 import jp.juggler.subwaytooter.api.finder.*
 import jp.juggler.subwaytooter.columnviewholder.setScrollPosition
+import jp.juggler.subwaytooter.pref.PrefB
+import jp.juggler.subwaytooter.pref.PrefI
 import jp.juggler.subwaytooter.util.ScrollPosition
 import jp.juggler.util.*
 
diff --git a/app/src/main/java/jp/juggler/subwaytooter/columnviewholder/ColumnViewHolder.kt b/app/src/main/java/jp/juggler/subwaytooter/columnviewholder/ColumnViewHolder.kt
index 842d43cd..0d072b0e 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/columnviewholder/ColumnViewHolder.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/columnviewholder/ColumnViewHolder.kt
@@ -21,6 +21,7 @@ import com.omadahealth.github.swipyrefreshlayout.library.SwipyRefreshLayout
 import com.omadahealth.github.swipyrefreshlayout.library.SwipyRefreshLayoutDirection
 import jp.juggler.subwaytooter.*
 import jp.juggler.subwaytooter.column.*
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.subwaytooter.streaming.*
 import jp.juggler.subwaytooter.table.AcctColor
 import jp.juggler.subwaytooter.util.*
@@ -108,6 +109,7 @@ class ColumnViewHolder(
     lateinit var ivColumnBackgroundImage: ImageView
     lateinit var llSearch: View
     lateinit var cbDontCloseColumn: CheckBox
+    lateinit var cbShowMediaDescription: CheckBox
     lateinit var cbRemoteOnly: CheckBox
     lateinit var cbWithAttachment: CheckBox
     lateinit var cbWithHighlight: CheckBox
@@ -403,6 +405,7 @@ class ColumnViewHolder(
         arrayOf(
             cbDontAutoRefresh,
             cbDontCloseColumn,
+            cbShowMediaDescription,
             cbDontShowBoost,
             cbDontShowFavourite,
             cbDontShowFollow,
@@ -810,8 +813,8 @@ class ColumnViewHolder(
                     text = context.getString(R.string.remote_only)
                 }.lparams(matchParent, wrapContent)
 
-                cbWithAttachment = checkBox {
-                    text = context.getString(R.string.with_attachment)
+                cbShowMediaDescription = checkBox {
+                    text = context.getString(R.string.show_media_description)
                 }.lparams(matchParent, wrapContent)
 
                 cbWithHighlight = checkBox {
@@ -866,6 +869,10 @@ class ColumnViewHolder(
                     text = context.getString(R.string.hide_media_default)
                 }.lparams(matchParent, wrapContent)
 
+                cbWithAttachment = checkBox {
+                    text = context.getString(R.string.with_attachment)
+                }.lparams(matchParent, wrapContent)
+
                 cbSystemNotificationNotRelated = checkBox {
                     text = context.getString(R.string.system_notification_not_related)
                 }.lparams(matchParent, wrapContent)
diff --git a/app/src/main/java/jp/juggler/subwaytooter/columnviewholder/ColumnViewHolderActions.kt b/app/src/main/java/jp/juggler/subwaytooter/columnviewholder/ColumnViewHolderActions.kt
index f8d6b14a..4fb94535 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/columnviewholder/ColumnViewHolderActions.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/columnviewholder/ColumnViewHolderActions.kt
@@ -71,6 +71,12 @@ fun ColumnViewHolder.onCheckedChangedImpl(view: CompoundButton?, isChecked: Bool
             activity.appState.saveColumnList()
         }
 
+        cbShowMediaDescription->{
+            column.showMediaDescription = isChecked
+            activity.appState.saveColumnList()
+            column.startLoading()
+        }
+
         cbWithAttachment -> {
             column.withAttachment = isChecked
             activity.appState.saveColumnList()
diff --git a/app/src/main/java/jp/juggler/subwaytooter/columnviewholder/ColumnViewHolderAnnouncements.kt b/app/src/main/java/jp/juggler/subwaytooter/columnviewholder/ColumnViewHolderAnnouncements.kt
index 89a2156b..6f0fab7a 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/columnviewholder/ColumnViewHolderAnnouncements.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/columnviewholder/ColumnViewHolderAnnouncements.kt
@@ -14,7 +14,7 @@ import com.google.android.flexbox.FlexWrap
 import com.google.android.flexbox.FlexboxLayout
 import com.google.android.flexbox.JustifyContent
 import jp.juggler.subwaytooter.ActMain
-import jp.juggler.subwaytooter.PrefB
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.subwaytooter.R
 import jp.juggler.subwaytooter.api.*
 import jp.juggler.subwaytooter.emoji.UnicodeEmoji
diff --git a/app/src/main/java/jp/juggler/subwaytooter/columnviewholder/ColumnViewHolderLifecycle.kt b/app/src/main/java/jp/juggler/subwaytooter/columnviewholder/ColumnViewHolderLifecycle.kt
index 0114018f..acee0f17 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/columnviewholder/ColumnViewHolderLifecycle.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/columnviewholder/ColumnViewHolderLifecycle.kt
@@ -4,8 +4,8 @@ import android.view.View
 import android.widget.ImageView
 import com.omadahealth.github.swipyrefreshlayout.library.SwipyRefreshLayoutDirection
 import jp.juggler.subwaytooter.App1
-import jp.juggler.subwaytooter.PrefB
-import jp.juggler.subwaytooter.PrefI
+import jp.juggler.subwaytooter.pref.PrefB
+import jp.juggler.subwaytooter.pref.PrefI
 import jp.juggler.subwaytooter.R
 import jp.juggler.subwaytooter.actmain.closePopup
 import jp.juggler.subwaytooter.column.*
@@ -151,6 +151,7 @@ fun ColumnViewHolder.onPageCreate(column: Column, pageIdx: Int, pageCount: Int)
         extraInvalidatorList.clear()
 
         cbDontCloseColumn.isCheckedNoAnime = column.dontClose
+        cbShowMediaDescription.isCheckedNoAnime = column.showMediaDescription
         cbRemoteOnly.isCheckedNoAnime = column.remoteOnly
         cbWithAttachment.isCheckedNoAnime = column.withAttachment
         cbWithHighlight.isCheckedNoAnime = column.withHighlight
diff --git a/app/src/main/java/jp/juggler/subwaytooter/columnviewholder/ColumnViewHolderQuickFilter.kt b/app/src/main/java/jp/juggler/subwaytooter/columnviewholder/ColumnViewHolderQuickFilter.kt
index e38b1dd6..1688f45e 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/columnviewholder/ColumnViewHolderQuickFilter.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/columnviewholder/ColumnViewHolderQuickFilter.kt
@@ -5,7 +5,7 @@ import android.graphics.Color
 import android.view.View
 import android.widget.ImageButton
 import android.widget.TextView
-import jp.juggler.subwaytooter.PrefB
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.subwaytooter.R
 import jp.juggler.subwaytooter.column.*
 import jp.juggler.util.applyAlphaMultiplier
diff --git a/app/src/main/java/jp/juggler/subwaytooter/columnviewholder/ViewHolderHeaderProfile.kt b/app/src/main/java/jp/juggler/subwaytooter/columnviewholder/ViewHolderHeaderProfile.kt
index b0b08cfa..b144e67e 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/columnviewholder/ViewHolderHeaderProfile.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/columnviewholder/ViewHolderHeaderProfile.kt
@@ -17,6 +17,8 @@ import jp.juggler.subwaytooter.api.entity.*
 import jp.juggler.subwaytooter.column.*
 import jp.juggler.subwaytooter.dialog.DlgTextInput
 import jp.juggler.subwaytooter.itemviewholder.DlgContextMenu
+import jp.juggler.subwaytooter.pref.PrefB
+import jp.juggler.subwaytooter.pref.PrefI
 import jp.juggler.subwaytooter.span.EmojiImageSpan
 import jp.juggler.subwaytooter.span.LinkInfo
 import jp.juggler.subwaytooter.span.MyClickableSpan
diff --git a/app/src/main/java/jp/juggler/subwaytooter/dialog/DlgQuickTootMenu.kt b/app/src/main/java/jp/juggler/subwaytooter/dialog/DlgQuickTootMenu.kt
index 1db8a808..e471dc06 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/dialog/DlgQuickTootMenu.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/dialog/DlgQuickTootMenu.kt
@@ -12,6 +12,8 @@ import java.lang.ref.WeakReference
 import android.view.Gravity
 import jp.juggler.subwaytooter.*
 import jp.juggler.subwaytooter.api.entity.TootVisibility
+import jp.juggler.subwaytooter.pref.PrefS
+import jp.juggler.subwaytooter.pref.put
 
 class DlgQuickTootMenu(
     internal val activity: ActMain,
diff --git a/app/src/main/java/jp/juggler/subwaytooter/dialog/EmojiPicker.kt b/app/src/main/java/jp/juggler/subwaytooter/dialog/EmojiPicker.kt
index 27a0dcc4..1ac23440 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/dialog/EmojiPicker.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/dialog/EmojiPicker.kt
@@ -14,6 +14,9 @@ import com.astuetz.PagerSlidingTabStrip
 import com.bumptech.glide.Glide
 import jp.juggler.subwaytooter.*
 import jp.juggler.subwaytooter.emoji.*
+import jp.juggler.subwaytooter.pref.PrefB
+import jp.juggler.subwaytooter.pref.PrefS
+import jp.juggler.subwaytooter.pref.put
 import jp.juggler.subwaytooter.table.SavedAccount
 import jp.juggler.subwaytooter.view.HeaderGridView
 import jp.juggler.subwaytooter.view.MyViewPager
diff --git a/app/src/main/java/jp/juggler/subwaytooter/emoji/EmojiBase.kt b/app/src/main/java/jp/juggler/subwaytooter/emoji/EmojiBase.kt
index d4cdd1c3..38bb9289 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/emoji/EmojiBase.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/emoji/EmojiBase.kt
@@ -2,7 +2,7 @@ package jp.juggler.subwaytooter.emoji
 
 import androidx.annotation.DrawableRes
 import jp.juggler.subwaytooter.App1
-import jp.juggler.subwaytooter.PrefB
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.subwaytooter.api.entity.Host
 import jp.juggler.subwaytooter.api.entity.Mappable
 import jp.juggler.util.JsonArray
diff --git a/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/DlgContextMenu.kt b/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/DlgContextMenu.kt
index dc22a88a..830969e9 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/DlgContextMenu.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/DlgContextMenu.kt
@@ -18,6 +18,8 @@ import jp.juggler.subwaytooter.column.Column
 import jp.juggler.subwaytooter.column.ColumnType
 import jp.juggler.subwaytooter.dialog.DlgListMember
 import jp.juggler.subwaytooter.dialog.DlgQRCode
+import jp.juggler.subwaytooter.pref.PrefB
+import jp.juggler.subwaytooter.pref.PrefI
 import jp.juggler.subwaytooter.span.MyClickableSpan
 import jp.juggler.subwaytooter.table.FavMute
 import jp.juggler.subwaytooter.table.SavedAccount
diff --git a/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolder.kt b/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolder.kt
index de4fd852..09af0692 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolder.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolder.kt
@@ -20,6 +20,8 @@ import jp.juggler.subwaytooter.api.entity.TootStatus
 import jp.juggler.subwaytooter.column.Column
 import jp.juggler.subwaytooter.columnviewholder.ItemListAdapter
 import jp.juggler.subwaytooter.drawable.PreviewCardBorder
+import jp.juggler.subwaytooter.pref.PrefB
+import jp.juggler.subwaytooter.pref.PrefI
 import jp.juggler.subwaytooter.table.SavedAccount
 import jp.juggler.subwaytooter.util.*
 import jp.juggler.subwaytooter.view.*
diff --git a/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolderActions.kt b/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolderActions.kt
index 1a5a89aa..f23239a9 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolderActions.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolderActions.kt
@@ -4,12 +4,12 @@ import android.view.View
 import jp.juggler.subwaytooter.ActMain
 import jp.juggler.subwaytooter.ActMediaViewer
 import jp.juggler.subwaytooter.App1
-import jp.juggler.subwaytooter.PrefB
 import jp.juggler.subwaytooter.action.*
 import jp.juggler.subwaytooter.actmain.nextPosition
 import jp.juggler.subwaytooter.api.entity.*
 import jp.juggler.subwaytooter.column.Column
 import jp.juggler.subwaytooter.column.startGap
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.subwaytooter.table.ContentWarning
 import jp.juggler.subwaytooter.table.MediaShown
 import jp.juggler.subwaytooter.util.openCustomTab
@@ -48,10 +48,29 @@ fun ItemViewHolder.onClickImpl(v: View?) {
             llReply -> clickReplyInfo(pos, accessInfo, column.type, statusReply, statusShowing)
 
             llFollow -> clickFollowInfo(pos, accessInfo, followAccount) { whoRef ->
-                DlgContextMenu(this, column, whoRef, null, (item as? TootNotification), tvContent).show()
+                DlgContextMenu(
+                    this,
+                    column,
+                    whoRef,
+                    null,
+                    (item as? TootNotification),
+                    tvContent
+                ).show()
             }
-            btnFollow -> clickFollowInfo(pos, accessInfo, followAccount, forceMenu = true) { whoRef ->
-                DlgContextMenu(this, column, whoRef, null, (item as? TootNotification), tvContent).show()
+            btnFollow -> clickFollowInfo(
+                pos,
+                accessInfo,
+                followAccount,
+                forceMenu = true
+            ) { whoRef ->
+                DlgContextMenu(
+                    this,
+                    column,
+                    whoRef,
+                    null,
+                    (item as? TootNotification),
+                    tvContent
+                ).show()
             }
 
             btnGapHead -> column.startGap(item.cast(), isHead = true)
@@ -59,11 +78,24 @@ fun ItemViewHolder.onClickImpl(v: View?) {
             btnSearchTag, llTrendTag -> clickTag(pos, item)
             btnListTL -> clickListTl(pos, accessInfo, item)
             btnListMore -> clickListMoreButton(pos, accessInfo, item)
-            btnFollowRequestAccept -> clickFollowRequestAccept(accessInfo, followAccount, accept = true)
-            btnFollowRequestDeny -> clickFollowRequestAccept(accessInfo, followAccount, accept = false)
+            btnFollowRequestAccept -> clickFollowRequestAccept(
+                accessInfo,
+                followAccount,
+                accept = true
+            )
+            btnFollowRequestDeny -> clickFollowRequestAccept(
+                accessInfo,
+                followAccount,
+                accept = false
+            )
             llFilter -> openFilterMenu(accessInfo, item.cast())
             ivCardImage -> clickCardImage(pos, accessInfo, statusShowing?.card)
-            llConversationIcons -> clickConversation(pos, accessInfo, listAdapter, summary = item.cast())
+            llConversationIcons -> clickConversation(
+                pos,
+                accessInfo,
+                listAdapter,
+                summary = item.cast()
+            )
         }
     }
 }
@@ -82,8 +114,22 @@ fun ItemViewHolder.onLongClickImpl(v: View?): Boolean {
                 longClickBoostedInfo(boostAccount)
 
             llReply ->
-                clickReplyInfo(pos, accessInfo, column.type, statusReply, statusShowing, longClick = true) { status ->
-                    DlgContextMenu(this, column, status.accountRef, status, item.cast(), tvContent).show()
+                clickReplyInfo(
+                    pos,
+                    accessInfo,
+                    column.type,
+                    statusReply,
+                    statusShowing,
+                    longClick = true
+                ) { status ->
+                    DlgContextMenu(
+                        this,
+                        column,
+                        status.accountRef,
+                        status,
+                        item.cast(),
+                        tvContent
+                    ).show()
                 }
 
             llFollow ->
@@ -164,6 +210,7 @@ private fun ItemViewHolder.clickMedia(i: Int) {
                 PrefB.bpUseInternalMediaViewer(App1.pref) ->
                     ActMediaViewer.open(
                         activity,
+                        column.showMediaDescription,
                         when (accessInfo.isMisskey) {
                             true -> ServiceType.MISSKEY
                             else -> ServiceType.MASTODON
@@ -219,7 +266,12 @@ private fun ItemViewHolder.clickTag(pos: Int, item: TimelineItem?) {
         when (item) {
             is TootTag -> tagTimeline(pos, accessInfo, item.name)
             is TootSearchGap -> column.startGap(item, isHead = true)
-            is TootConversationSummary -> clickConversation(pos, accessInfo, listAdapter, summary = item)
+            is TootConversationSummary -> clickConversation(
+                pos,
+                accessInfo,
+                listAdapter,
+                summary = item
+            )
             is TootGap -> clickTootGap(column, item)
             is TootDomainBlock -> clickDomainBlock(accessInfo, item)
             is TootScheduled -> clickScheduledToot(accessInfo, item, column)
diff --git a/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolderPreviewCard.kt b/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolderPreviewCard.kt
index 5bef4024..5efc29dd 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolderPreviewCard.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolderPreviewCard.kt
@@ -1,8 +1,8 @@
 package jp.juggler.subwaytooter.itemviewholder
 
 import android.view.View
-import jp.juggler.subwaytooter.PrefB
-import jp.juggler.subwaytooter.PrefS
+import jp.juggler.subwaytooter.pref.PrefB
+import jp.juggler.subwaytooter.pref.PrefS
 import jp.juggler.subwaytooter.R
 import jp.juggler.subwaytooter.api.entity.TootStatus
 import jp.juggler.subwaytooter.column.ColumnType
diff --git a/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolderReaction.kt b/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolderReaction.kt
index e32e1cfa..fd39b95f 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolderReaction.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolderReaction.kt
@@ -10,8 +10,8 @@ import com.google.android.flexbox.FlexWrap
 import com.google.android.flexbox.FlexboxLayout
 import com.google.android.flexbox.JustifyContent
 import jp.juggler.subwaytooter.ActMain
-import jp.juggler.subwaytooter.PrefB
-import jp.juggler.subwaytooter.PrefI
+import jp.juggler.subwaytooter.pref.PrefB
+import jp.juggler.subwaytooter.pref.PrefI
 import jp.juggler.subwaytooter.R
 import jp.juggler.subwaytooter.action.reactionAdd
 import jp.juggler.subwaytooter.action.reactionFromAnotherAccount
diff --git a/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolderShow.kt b/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolderShow.kt
index 068a3eed..3305efe7 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolderShow.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolderShow.kt
@@ -20,6 +20,8 @@ import jp.juggler.subwaytooter.column.getAcctColor
 import jp.juggler.subwaytooter.column.getContentColor
 import jp.juggler.subwaytooter.columnviewholder.ItemListAdapter
 import jp.juggler.subwaytooter.drawable.PreviewCardBorder
+import jp.juggler.subwaytooter.pref.PrefB
+import jp.juggler.subwaytooter.pref.PrefI
 import jp.juggler.subwaytooter.span.MyClickableSpan
 import jp.juggler.subwaytooter.table.*
 import jp.juggler.subwaytooter.util.Benchmark
diff --git a/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolderShowNotification.kt b/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolderShowNotification.kt
index eba71ef0..1bd927c4 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolderShowNotification.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolderShowNotification.kt
@@ -2,7 +2,7 @@ package jp.juggler.subwaytooter.itemviewholder
 
 import android.view.Gravity
 import android.view.View
-import jp.juggler.subwaytooter.PrefI
+import jp.juggler.subwaytooter.pref.PrefI
 import jp.juggler.subwaytooter.R
 import jp.juggler.subwaytooter.Styler
 import jp.juggler.subwaytooter.actmain.addColumn
diff --git a/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolderShowStatus.kt b/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolderShowStatus.kt
index 1a7e86d4..4e841da9 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolderShowStatus.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/ItemViewHolderShowStatus.kt
@@ -9,6 +9,8 @@ import jp.juggler.subwaytooter.actmain.checkAutoCW
 import jp.juggler.subwaytooter.api.entity.*
 import jp.juggler.subwaytooter.column.Column
 import jp.juggler.subwaytooter.column.ColumnType
+import jp.juggler.subwaytooter.pref.PrefB
+import jp.juggler.subwaytooter.pref.PrefI
 import jp.juggler.subwaytooter.table.ContentWarning
 import jp.juggler.subwaytooter.table.MediaShown
 import jp.juggler.subwaytooter.util.OpenSticker
@@ -297,7 +299,7 @@ private fun ItemViewHolder.showAttachments(status: TootStatus) {
             if (mediaAttachments.isEmpty()) null else mediaAttachments[0] as? TootAttachment
         btnShowMedia.blurhash = m0?.blurhash
 
-        if (sb.isNotEmpty()) {
+        if (sb.isNotEmpty() && column.showMediaDescription) {
             tvMediaDescription.visibility = View.VISIBLE
             tvMediaDescription.text = sb
         }
diff --git a/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/StatusButtons.kt b/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/StatusButtons.kt
index afdc13e1..5cc3f265 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/StatusButtons.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/itemviewholder/StatusButtons.kt
@@ -17,6 +17,8 @@ import jp.juggler.subwaytooter.actmain.nextPosition
 import jp.juggler.subwaytooter.api.entity.*
 import jp.juggler.subwaytooter.column.Column
 import jp.juggler.subwaytooter.column.getContentColor
+import jp.juggler.subwaytooter.pref.PrefB
+import jp.juggler.subwaytooter.pref.PrefI
 import jp.juggler.subwaytooter.table.SavedAccount
 import jp.juggler.subwaytooter.table.UserRelation
 import jp.juggler.subwaytooter.util.CustomShare
diff --git a/app/src/main/java/jp/juggler/subwaytooter/mfm/SpanOutputEnv.kt b/app/src/main/java/jp/juggler/subwaytooter/mfm/SpanOutputEnv.kt
index 5deb1c28..d79e2f31 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/mfm/SpanOutputEnv.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/mfm/SpanOutputEnv.kt
@@ -5,7 +5,7 @@ import android.text.Spanned
 import android.text.style.RelativeSizeSpan
 import jp.juggler.subwaytooter.ActMain
 import jp.juggler.subwaytooter.App1
-import jp.juggler.subwaytooter.PrefB
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.subwaytooter.api.entity.Acct
 import jp.juggler.subwaytooter.api.entity.EntityId
 import jp.juggler.subwaytooter.api.entity.TootMention
diff --git a/app/src/main/java/jp/juggler/subwaytooter/notification/PollingWorker.kt b/app/src/main/java/jp/juggler/subwaytooter/notification/PollingWorker.kt
index baf4cb72..1d15c541 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/notification/PollingWorker.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/notification/PollingWorker.kt
@@ -19,6 +19,9 @@ import com.google.firebase.messaging.FirebaseMessaging
 import jp.juggler.subwaytooter.*
 import jp.juggler.subwaytooter.api.TootApiClient
 import jp.juggler.subwaytooter.api.entity.*
+import jp.juggler.subwaytooter.pref.PrefDevice
+import jp.juggler.subwaytooter.pref.PrefS
+import jp.juggler.subwaytooter.pref.pref
 import jp.juggler.subwaytooter.table.*
 import jp.juggler.subwaytooter.util.*
 import jp.juggler.util.*
diff --git a/app/src/main/java/jp/juggler/subwaytooter/notification/TaskRunner.kt b/app/src/main/java/jp/juggler/subwaytooter/notification/TaskRunner.kt
index 47f70e05..0ec87b6f 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/notification/TaskRunner.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/notification/TaskRunner.kt
@@ -9,7 +9,7 @@ import androidx.core.app.NotificationCompat
 import androidx.core.content.ContextCompat
 import jp.juggler.subwaytooter.ActCallback
 import jp.juggler.subwaytooter.EventReceiver
-import jp.juggler.subwaytooter.PrefB
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.subwaytooter.R
 import jp.juggler.subwaytooter.api.TootApiCallback
 import jp.juggler.subwaytooter.api.TootApiClient
diff --git a/app/src/main/java/jp/juggler/subwaytooter/pref/PrefB.kt b/app/src/main/java/jp/juggler/subwaytooter/pref/PrefB.kt
new file mode 100644
index 00000000..5676065b
--- /dev/null
+++ b/app/src/main/java/jp/juggler/subwaytooter/pref/PrefB.kt
@@ -0,0 +1,350 @@
+package jp.juggler.subwaytooter.pref
+
+import jp.juggler.subwaytooter.pref.impl.BooleanPref
+
+object PrefB {
+    // boolean
+
+    val bpDisableEmojiAnimation = BooleanPref(
+        "disable_emoji_animation",
+        false
+    )
+
+    // val bpDisableFastScroller = BooleanPref("disable_fast_scroller", true, 0) // R.id.swDisableFastScroller)
+
+    val bpDisableTabletMode = BooleanPref(
+        "disable_tablet_mode",
+        false
+    )
+
+    val bpDontConfirmBeforeCloseColumn = BooleanPref(
+        "DontConfirmBeforeCloseColumn",
+        false
+    )
+
+    val bpDontCropMediaThumb = BooleanPref(
+        "DontCropMediaThumb",
+        true
+    )
+
+    val bpDontDuplicationCheck = BooleanPref(
+        "dont_duplication_check",
+        false
+    )
+
+    val bpDontRefreshOnResume = BooleanPref(
+        "dont_refresh_on_resume",
+        false
+    )
+
+    val bpDontRound = BooleanPref(
+        "dont_round",
+        false
+    )
+
+    val bpDontScreenOff = BooleanPref(
+        "dont_screen_off",
+        false
+    )
+
+    val bpDontUseActionButtonWithQuickPostBar = BooleanPref(
+        "dont_use_action_button",
+        false
+    )
+
+    val bpDontUseStreaming = BooleanPref(
+        "dont_use_streaming",
+        false
+    )
+
+    val bpEnableGifAnimation = BooleanPref(
+        "enable_gif_animation",
+        false
+    )
+
+    val bpExitAppWhenCloseProtectedColumn = BooleanPref(
+        "ExitAppWhenCloseProtectedColumn",
+        false
+    )
+
+    val bpMentionFullAcct = BooleanPref(
+        "mention_full_acct",
+        false
+    )
+
+    val bpNotificationLED = BooleanPref(
+        "notification_led",
+        true
+    )
+
+    val bpNotificationSound = BooleanPref(
+        "notification_sound",
+        true
+    )
+
+    val bpNotificationVibration = BooleanPref(
+        "notification_vibration",
+        true
+    )
+
+    val bpPostButtonBarTop = BooleanPref(
+        "post_button_bar_at_top",
+        true
+    )
+
+    val bpPriorChrome = BooleanPref(
+        "prior_chrome",
+        true
+    )
+    val bpDontUseCustomTabs = BooleanPref(
+        "DontUseCustomTabs",
+        false
+    )
+    val bpPriorLocalURL = BooleanPref(
+        "prior_local_url",
+        false
+    )
+
+    val bpQuickPostBar = BooleanPref(
+        "quick_toot_bar",
+        false
+    )
+
+    val bpRelativeTimestamp = BooleanPref(
+        "relative_timestamp",
+        true
+    )
+
+    val bpShortAcctLocalUser = BooleanPref(
+        "short_acct_local_user",
+        true
+    )
+
+    val bpShowFollowButtonInButtonBar = BooleanPref(
+        "ShowFollowButtonInButtonBar",
+        false
+    )
+
+    val bpSimpleList = BooleanPref(
+        "simple_list",
+        true
+    )
+
+    val bpUseInternalMediaViewer = BooleanPref(
+        "use_internal_media_viewer",
+        true
+    )
+
+    val bpShowAppName = BooleanPref(
+        "show_app_name",
+        false
+    )
+    val bpShowLanguage = BooleanPref(
+        "ShowLanguage",
+        false
+    )
+    val bpForceGap = BooleanPref(
+        "force_gap",
+        false
+    )
+
+    val bpShareViewPool = BooleanPref(
+        "ShareViewPool",
+        true
+    )
+
+    val bpAllowColumnDuplication = BooleanPref(
+        "AllowColumnDuplication",
+        true
+    )
+
+    val bpAppendAttachmentUrlToContent = BooleanPref(
+        "AppendAttachmentUrlToContent",
+        false
+    )
+
+    val bpVerticalArrangeThumbnails = BooleanPref(
+        "VerticalArrangeThumbnails",
+        false
+    )
+
+    val bpDontShowPreviewCard = BooleanPref(
+        "DontShowPreviewCard",
+        false
+    )
+
+    val bpScrollTopFromColumnStrip = BooleanPref(
+        "ScrollTopFromColumnStrip",
+        false
+    )
+
+    val bpOpenSticker = BooleanPref(
+        "InstanceTicker", // 歴史的な理由でキー名が異なる
+        false
+    )
+
+    val bpLinksInContextMenu = BooleanPref(
+        "LinksInContextMenu",
+        false
+    )
+    val bpMoveNotificationsQuickFilter = BooleanPref(
+        "MoveNotificationsQuickFilter",
+        false
+    )
+    val bpShowAcctInSystemNotification = BooleanPref(
+        "ShowAcctInSystemNotification",
+        false
+    )
+    val bpShowLinkUnderline = BooleanPref(
+        "ShowLinkUnderline",
+        false
+    )
+
+    val bpShowSearchClear = BooleanPref(
+        "ShowSearchClear",
+        false
+    )
+
+    val bpDontRemoveDeletedToot = BooleanPref(
+        "DontRemoveDeletedToot",
+        false
+    )
+
+    val bpDontShowColumnBackgroundImage = BooleanPref(
+        "DontShowColumnBackgroundImage",
+        false
+    )
+
+    val bpCustomEmojiSeparatorZwsp = BooleanPref(
+        "CustomEmojiSeparatorZwsp",
+        false
+    )
+
+    val bpShowTranslateButton = BooleanPref(
+        "ShowTranslateButton",
+        false
+    )
+
+    val bpDirectoryLastActive = BooleanPref(
+        "DirectoryLastActive",
+        true
+    )
+
+    val bpDirectoryFollowers = BooleanPref(
+        "DirectoryFollowers",
+        true
+    )
+
+    val bpDirectoryTootCount = BooleanPref(
+        "DirectoryTootCount",
+        true
+    )
+    val bpDirectoryNote = BooleanPref(
+        "DirectoryNote",
+        true
+    )
+
+    val bpWarnHashtagAsciiAndNonAscii = BooleanPref(
+        "WarnHashtagAsciiAndNonAscii",
+        false
+    )
+
+    val bpEnablePixelfed = BooleanPref(
+        "EnablePixelfed",
+        false
+    )
+
+    val bpQuickTootOmitAccountSelection = BooleanPref(
+        "QuickTootOmitAccountSelection",
+        false
+    )
+
+    val bpSeparateReplyNotificationGroup = BooleanPref(
+        "SeparateReplyNotificationGroup",
+        false
+    )
+
+    val bpAlwaysExpandContextMenuItems = BooleanPref(
+        "AlwaysExpandContextMenuItems",
+        false
+    )
+
+    val bpShowBookmarkButton = BooleanPref(
+        "ShowBookmarkButton2",
+        true
+    )
+
+    val bpShowFilteredWord = BooleanPref(
+        "ShowFilteredWord",
+        false
+    )
+
+    val bpEnableDomainTimeline = BooleanPref(
+        "EnableDomainTimeline",
+        false
+    )
+
+    val bpDivideNotification = BooleanPref(
+        "DivideNotification",
+        false
+    )
+
+    val bpHideFollowCount = BooleanPref(
+        "HideFollowCount",
+        false
+    )
+
+    val bpEmojioneShortcode = BooleanPref(
+        "EmojioneShortcode",
+        true
+    )
+
+    val bpEmojiPickerCloseOnSelected = BooleanPref(
+        "EmojiPickerCloseOnSelected",
+        true
+    )
+
+    val bpCheckBetaVersion = BooleanPref(
+        "CheckBetaVersion",
+        false
+    )
+
+    val bpIgnoreTextInSharedMedia = BooleanPref(
+        "IgnoreTextInSharedMedia",
+        false
+    )
+
+    val bpEmojiPickerCategoryOther = BooleanPref(
+        "EmojiPickerCategoryOther",
+        false
+    )
+
+    val bpInAppUnicodeEmoji = BooleanPref(
+        "InAppUnicodeEmoji",
+        true
+    )
+
+    val bpKeepReactionSpace = BooleanPref(
+        "KeepReactionSpace",
+        false
+    )
+
+    val bpMultiWindowPost = BooleanPref(
+        "MultiWindowPost",
+        false
+    )
+
+    val bpManyWindowPost = BooleanPref(
+        "ManyWindowPost",
+        false
+    )
+
+    val bpMfmDecorationEnabled = BooleanPref(
+        "MfmDecorationEnabled",
+        true
+    )
+    val bpMfmDecorationShowUnsupportedMarkup = BooleanPref(
+        "MfmDecorationShowUnsupportedMarkup",
+        true
+    )
+}
\ No newline at end of file
diff --git a/app/src/main/java/jp/juggler/subwaytooter/PrefDevice.kt b/app/src/main/java/jp/juggler/subwaytooter/pref/PrefDevice.kt
similarity index 94%
rename from app/src/main/java/jp/juggler/subwaytooter/PrefDevice.kt
rename to app/src/main/java/jp/juggler/subwaytooter/pref/PrefDevice.kt
index a3f01257..f32a1e8e 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/PrefDevice.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/pref/PrefDevice.kt
@@ -1,4 +1,4 @@
-package jp.juggler.subwaytooter
+package jp.juggler.subwaytooter.pref
 
 import android.content.Context
 import android.content.SharedPreferences
diff --git a/app/src/main/java/jp/juggler/subwaytooter/pref/PrefExt.kt b/app/src/main/java/jp/juggler/subwaytooter/pref/PrefExt.kt
new file mode 100644
index 00000000..2e6919c0
--- /dev/null
+++ b/app/src/main/java/jp/juggler/subwaytooter/pref/PrefExt.kt
@@ -0,0 +1,29 @@
+package jp.juggler.subwaytooter.pref
+
+import android.content.Context
+import android.content.SharedPreferences
+import jp.juggler.subwaytooter.pref.impl.*
+
+fun Context.pref(): SharedPreferences =
+    this.getSharedPreferences(this.packageName + "_preferences", Context.MODE_PRIVATE)
+
+fun SharedPreferences.Editor.remove(item: BasePref<*>): SharedPreferences.Editor {
+    item.remove(this)
+    return this
+}
+
+fun SharedPreferences.Editor.put(item: BooleanPref, v: Boolean) =
+    this.apply { item.put(this, v) }
+
+fun SharedPreferences.Editor.put(item: StringPref, v: String) =
+    this.apply { item.put(this, v) }
+
+fun SharedPreferences.Editor.put(item: IntPref, v: Int) =
+    this.apply { item.put(this, v) }
+
+fun SharedPreferences.Editor.put(item: LongPref, v: Long) =
+    this.apply { item.put(this, v) }
+
+fun SharedPreferences.Editor.put(item: FloatPref, v: Float) =
+    this.apply { item.put(this, v) }
+
diff --git a/app/src/main/java/jp/juggler/subwaytooter/pref/PrefF.kt b/app/src/main/java/jp/juggler/subwaytooter/pref/PrefF.kt
new file mode 100644
index 00000000..336fc04b
--- /dev/null
+++ b/app/src/main/java/jp/juggler/subwaytooter/pref/PrefF.kt
@@ -0,0 +1,16 @@
+package jp.juggler.subwaytooter.pref
+
+import jp.juggler.subwaytooter.pref.impl.FloatPref
+
+object PrefF {
+    // float
+
+    val fpTimelineFontSize = FloatPref("timeline_font_size", Float.NaN)
+    val fpAcctFontSize = FloatPref("acct_font_size", Float.NaN)
+    val fpNotificationTlFontSize = FloatPref("notification_tl_font_size", Float.NaN)
+    val fpHeaderTextSize = FloatPref("HeaderTextSize", Float.NaN)
+    internal const val default_timeline_font_size = 14f
+    internal const val default_acct_font_size = 12f
+    internal const val default_notification_tl_font_size = 14f
+    internal const val default_header_font_size = 14f
+}
\ No newline at end of file
diff --git a/app/src/main/java/jp/juggler/subwaytooter/pref/PrefI.kt b/app/src/main/java/jp/juggler/subwaytooter/pref/PrefI.kt
new file mode 100644
index 00000000..1cff4b8b
--- /dev/null
+++ b/app/src/main/java/jp/juggler/subwaytooter/pref/PrefI.kt
@@ -0,0 +1,116 @@
+package jp.juggler.subwaytooter.pref
+
+import android.graphics.Color
+import jp.juggler.subwaytooter.itemviewholder.AdditionalButtonsPosition
+import jp.juggler.subwaytooter.pref.impl.IntPref
+
+object PrefI {
+    // int
+
+    val ipBackButtonAction = IntPref("back_button_action", 0)
+
+    @Suppress("unused")
+    const val BACK_ASK_ALWAYS = 0
+    const val BACK_CLOSE_COLUMN = 1
+    const val BACK_OPEN_COLUMN_LIST = 2
+    const val BACK_EXIT_APP = 3
+
+    val ipUiTheme = IntPref("ui_theme", 0)
+
+//	val ipResizeImage = IntPref("resize_image", 4)
+
+    const val RC_SIMPLE = 0
+    const val RC_ACTUAL = 1
+
+    @Suppress("unused")
+    const val RC_NONE = 2
+
+    val ipRepliesCount = IntPref("RepliesCount", RC_SIMPLE)
+    val ipBoostsCount = IntPref("BoostsCount", RC_ACTUAL)
+    val ipFavouritesCount = IntPref("FavouritesCount", RC_ACTUAL)
+
+    val ipRefreshAfterToot = IntPref("refresh_after_toot", 0)
+    const val RAT_REFRESH_SCROLL = 0
+
+    @Suppress("unused")
+    const val RAT_REFRESH_DONT_SCROLL = 1
+    const val RAT_DONT_REFRESH = 2
+
+    @Suppress("unused")
+    const val VS_BY_ACCOUNT = 0
+    const val VS_MASTODON = 1
+    const val VS_MISSKEY = 2
+    val ipVisibilityStyle = IntPref("ipVisibilityStyle", VS_BY_ACCOUNT)
+
+    val ipAdditionalButtonsPosition =
+        IntPref("AdditionalButtonsPosition", AdditionalButtonsPosition.End.idx)
+
+    val ipFooterButtonBgColor = IntPref("footer_button_bg_color", 0)
+    val ipFooterButtonFgColor = IntPref("footer_button_fg_color", 0)
+    val ipFooterTabBgColor = IntPref("footer_tab_bg_color", 0)
+    val ipFooterTabDividerColor = IntPref("footer_tab_divider_color", 0)
+    val ipFooterTabIndicatorColor = IntPref("footer_tab_indicator_color", 0)
+    val ipListDividerColor = IntPref("listDividerColor", 0)
+    val ipLastColumnPos = IntPref("last_column_pos", -1)
+    val ipBoostButtonJustify = IntPref("ipBoostButtonJustify", 0) // 0=左,1=中央,2=右
+
+    private const val JWCP_DEFAULT = 0
+    const val JWCP_START = 1
+    const val JWCP_END = 2
+    val ipJustifyWindowContentPortrait =
+        IntPref("JustifyWindowContentPortrait", JWCP_DEFAULT) // 0=default,1=start,2=end
+
+    const val GSP_HEAD = 0
+    private const val GSP_TAIL = 1
+    val ipGapHeadScrollPosition = IntPref("GapHeadScrollPosition", GSP_TAIL)
+    val ipGapTailScrollPosition = IntPref("GapTailScrollPosition", GSP_TAIL)
+
+    val ipLinkColor = IntPref("LinkColor", 0)
+
+    val ipSwitchOnColor = IntPref("SwitchOnColor", Color.BLACK or 0x0080ff)
+
+    val ipButtonBoostedColor = IntPref("ButtonBoostedColor", 0)
+    val ipButtonFavoritedColor = IntPref("ButtonFavoritedColor", 0)
+    val ipButtonBookmarkedColor = IntPref("ButtonBookmarkedColor", 0)
+    val ipButtonFollowingColor = IntPref("ButtonFollowingColor", 0)
+    val ipButtonFollowRequestColor = IntPref("ButtonFollowRequestColor", 0)
+    val ipButtonReactionedColor = IntPref("ButtonReactionedColor", 0)
+
+    val ipStatusBarColor = IntPref("StatusBarColor", 0)
+    val ipNavigationBarColor = IntPref("NavigationBarColor", 0)
+
+    val ipTootColorUnlisted = IntPref("ipTootColorUnlisted", 0)
+    val ipTootColorFollower = IntPref("ipTootColorFollower", 0)
+    val ipTootColorDirectUser = IntPref("ipTootColorDirectUser", 0)
+    val ipTootColorDirectMe = IntPref("ipTootColorDirectMe", 0)
+
+    val ipEventBgColorBoost = IntPref("EventBgColorBoost", 0)
+    val ipEventBgColorFavourite = IntPref("EventBgColorFavourite", 0)
+    val ipEventBgColorBookmark = IntPref("EventBgColorBookmark", 0)
+    val ipEventBgColorFollow = IntPref("EventBgColorFollow", 0)
+    val ipEventBgColorMention = IntPref("EventBgColorMention", 0)
+    val ipEventBgColorUnfollow = IntPref("EventBgColorUnfollow", 0)
+    val ipEventBgColorReaction = IntPref("EventBgColorReaction", 0)
+    val ipEventBgColorQuote = IntPref("EventBgColorQuote", 0)
+    val ipEventBgColorVote = IntPref("EventBgColorVote", 0)
+    val ipEventBgColorFollowRequest = IntPref("EventBgColorFollowRequest", 0)
+    val ipEventBgColorStatus = IntPref("EventBgColorStatus", 0)
+
+    val ipEventBgColorGap = IntPref("EventBgColorGap", 0)
+
+    val ipCcdHeaderBg = IntPref("ipCcdHeaderBg", 0)
+    val ipCcdHeaderFg = IntPref("ipCcdHeaderFg", 0)
+    val ipCcdContentBg = IntPref("ipCcdContentBg", 0)
+    val ipCcdContentAcct = IntPref("ipCcdContentAcct", 0)
+    val ipCcdContentText = IntPref("ipCcdContentText", 0)
+
+    val ipSearchBgColor = IntPref("SearchBgColor", 0)
+    val ipAnnouncementsBgColor = IntPref("AnnouncementsBgColor", 0)
+    val ipConversationMainTootBgColor = IntPref("ConversationMainTootBgColor", 0)
+    val ipVerifiedLinkBgColor = IntPref("VerifiedLinkBgColor", 0)
+    val ipVerifiedLinkFgColor = IntPref("VerifiedLinkFgColor", 0)
+
+    //	val ipTrendTagCountShowing = IntPref("TrendTagCountShowing", 0)
+    //	const val TTCS_WEEKLY = 0
+    //	const val TTCS_DAILY = 1
+}
\ No newline at end of file
diff --git a/app/src/main/java/jp/juggler/subwaytooter/pref/PrefL.kt b/app/src/main/java/jp/juggler/subwaytooter/pref/PrefL.kt
new file mode 100644
index 00000000..d9f14e99
--- /dev/null
+++ b/app/src/main/java/jp/juggler/subwaytooter/pref/PrefL.kt
@@ -0,0 +1,9 @@
+package jp.juggler.subwaytooter.pref
+
+import jp.juggler.subwaytooter.pref.impl.LongPref
+
+object PrefL {
+
+    // long
+    val lpTabletTootDefaultAccount = LongPref("tablet_toot_default_account", -1L)
+}
\ No newline at end of file
diff --git a/app/src/main/java/jp/juggler/subwaytooter/pref/PrefS.kt b/app/src/main/java/jp/juggler/subwaytooter/pref/PrefS.kt
new file mode 100644
index 00000000..c575182a
--- /dev/null
+++ b/app/src/main/java/jp/juggler/subwaytooter/pref/PrefS.kt
@@ -0,0 +1,52 @@
+package jp.juggler.subwaytooter.pref
+
+import jp.juggler.subwaytooter.pref.impl.StringPref
+
+object PrefS {
+
+    // string
+    val spColumnWidth = StringPref("ColumnWidth", "")
+    val spMediaThumbHeight = StringPref("MediaThumbHeight", "")
+    val spClientName = StringPref("client_name", "")
+    val spQuoteNameFormat = StringPref("quote_name_format", "")
+    val spAutoCWLines = StringPref("auto_cw_lines", "0")
+    val spCardDescriptionLength = StringPref("CardDescriptionLength", "64")
+    val spAvatarIconSize = StringPref("avatar_icon_size", "48")
+    val spNotificationTlIconSize = StringPref("notification_tl_icon_size", "24")
+    val spBoostButtonSize = StringPref("BoostButtonSize", "35")
+    val spReplyIconSize = StringPref("ReplyIconSize", "24")
+    val spHeaderIconSize = StringPref("HeaderIconSize", "24")
+    val spStripIconSize = StringPref("StripIconSize", "30")
+
+    // val spMediaSizeMax = StringPref("max_media_size", "8")
+    // val spMovieSizeMax = StringPref("max_movie_size", "40")
+    // val spMediaSizeMaxPixelfed = StringPref("MediaSizeMaxPixelfed", "15")
+
+    val spTimelineFont = StringPref("timeline_font", "", skipImport = true)
+    val spTimelineFontBold = StringPref("timeline_font_bold", "", skipImport = true)
+    val spMspUserToken = StringPref("mastodon_search_portal_user_token", "")
+    val spEmojiPickerRecent = StringPref("emoji_picker_recent", "")
+    val spRoundRatio = StringPref("round_ratio", "33")
+    val spBoostAlpha = StringPref("BoostAlpha", "60")
+
+    val spScreenBottomPadding = StringPref("ScreenBottomPadding", "8")
+
+    val spPullNotificationCheckInterval = StringPref("PullNotificationCheckInterval", "15")
+    val spUserAgent = StringPref("UserAgent", "")
+
+    val spMediaReadTimeout = StringPref("spMediaReadTimeout", "60")
+    val spAgreedPrivacyPolicyDigest = StringPref("spAgreedPrivacyPolicyDigest", "")
+
+    val spTimeZone = StringPref("TimeZone", "")
+
+    val spQuickTootMacro = StringPref("QuickTootMacro", "")
+    val spQuickTootVisibility = StringPref("QuickTootVisibility", "")
+
+    val spTranslateAppComponent = StringPref("TranslateAppComponent", "")
+    val spCustomShare1 = StringPref("CustomShare1", "")
+    val spCustomShare2 = StringPref("CustomShare2", "")
+    val spCustomShare3 = StringPref("CustomShare3", "")
+    // val spWebBrowser = StringPref("WebBrowser", "")
+
+    val spTimelineSpacing = StringPref("TimelineSpacing", "")
+}
\ No newline at end of file
diff --git a/app/src/main/java/jp/juggler/subwaytooter/pref/impl/BasePref.kt b/app/src/main/java/jp/juggler/subwaytooter/pref/impl/BasePref.kt
new file mode 100644
index 00000000..c8d1612b
--- /dev/null
+++ b/app/src/main/java/jp/juggler/subwaytooter/pref/impl/BasePref.kt
@@ -0,0 +1,46 @@
+package jp.juggler.subwaytooter.pref.impl
+
+import android.content.Context
+import android.content.SharedPreferences
+import jp.juggler.subwaytooter.pref.pref
+
+@Suppress("EqualsOrHashCode")
+abstract class BasePref<T>(val key: String, val defVal: T) {
+
+    companion object {
+        // キー名と設定項目のマップ。インポートやアプリ設定で使う
+        val allPref = HashMap<String, BasePref<*>>()
+    }
+
+    init {
+        when {
+            allPref[key] != null -> error("Preference key duplicate: $key")
+            else -> {
+                @Suppress("LeakingThis")
+                allPref[key] = this
+            }
+        }
+    }
+
+    abstract fun put(editor: SharedPreferences.Editor, v: T)
+    abstract operator fun invoke(pref: SharedPreferences): T
+
+    override fun equals(other: Any?) =
+        this === other
+
+    override fun hashCode(): Int = key.hashCode()
+
+    operator fun invoke(context: Context): T =
+        invoke(context.pref())
+
+    fun remove(e: SharedPreferences.Editor): SharedPreferences.Editor =
+        e.remove(key)
+
+    fun removeDefault(pref: SharedPreferences, e: SharedPreferences.Editor) =
+        if (pref.contains(key) && this.invoke(pref) == defVal) {
+            e.remove(key)
+            true
+        } else {
+            false
+        }
+}
\ No newline at end of file
diff --git a/app/src/main/java/jp/juggler/subwaytooter/pref/impl/BooleanPref.kt b/app/src/main/java/jp/juggler/subwaytooter/pref/impl/BooleanPref.kt
new file mode 100644
index 00000000..2123897c
--- /dev/null
+++ b/app/src/main/java/jp/juggler/subwaytooter/pref/impl/BooleanPref.kt
@@ -0,0 +1,14 @@
+package jp.juggler.subwaytooter.pref.impl
+
+import android.content.SharedPreferences
+
+class BooleanPref(key: String, defVal: Boolean) : BasePref<Boolean>(key, defVal) {
+
+    override operator fun invoke(pref: SharedPreferences): Boolean =
+        pref.getBoolean(key, defVal)
+
+    // put if value is not default, remove if value is same to default
+    override fun put(editor: SharedPreferences.Editor, v: Boolean) {
+        if (v == defVal) editor.remove(key) else editor.putBoolean(key, v)
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/jp/juggler/subwaytooter/pref/impl/FloatPref.kt b/app/src/main/java/jp/juggler/subwaytooter/pref/impl/FloatPref.kt
new file mode 100644
index 00000000..db0343fa
--- /dev/null
+++ b/app/src/main/java/jp/juggler/subwaytooter/pref/impl/FloatPref.kt
@@ -0,0 +1,13 @@
+package jp.juggler.subwaytooter.pref.impl
+
+import android.content.SharedPreferences
+
+class FloatPref(key: String, defVal: Float) : BasePref<Float>(key, defVal) {
+
+    override operator fun invoke(pref: SharedPreferences): Float =
+        pref.getFloat(key, defVal)
+
+    override fun put(editor: SharedPreferences.Editor, v: Float) {
+        if (v == defVal) editor.remove(key) else editor.putFloat(key, v)
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/jp/juggler/subwaytooter/pref/impl/IntPref.kt b/app/src/main/java/jp/juggler/subwaytooter/pref/impl/IntPref.kt
new file mode 100644
index 00000000..34ce9760
--- /dev/null
+++ b/app/src/main/java/jp/juggler/subwaytooter/pref/impl/IntPref.kt
@@ -0,0 +1,13 @@
+package jp.juggler.subwaytooter.pref.impl
+
+import android.content.SharedPreferences
+
+class IntPref(key: String, defVal: Int) : BasePref<Int>(key, defVal) {
+
+    override operator fun invoke(pref: SharedPreferences): Int =
+        pref.getInt(key, defVal)
+
+    override fun put(editor: SharedPreferences.Editor, v: Int) {
+        if (v == defVal) editor.remove(key) else editor.putInt(key, v)
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/jp/juggler/subwaytooter/pref/impl/LongPref.kt b/app/src/main/java/jp/juggler/subwaytooter/pref/impl/LongPref.kt
new file mode 100644
index 00000000..c3f2ccfd
--- /dev/null
+++ b/app/src/main/java/jp/juggler/subwaytooter/pref/impl/LongPref.kt
@@ -0,0 +1,13 @@
+package jp.juggler.subwaytooter.pref.impl
+
+import android.content.SharedPreferences
+
+class LongPref(key: String, defVal: Long) : BasePref<Long>(key, defVal) {
+
+    override operator fun invoke(pref: SharedPreferences): Long =
+        pref.getLong(key, defVal)
+
+    override fun put(editor: SharedPreferences.Editor, v: Long) {
+        if (v == defVal) editor.remove(key) else editor.putLong(key, v)
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/jp/juggler/subwaytooter/pref/impl/StringPref.kt b/app/src/main/java/jp/juggler/subwaytooter/pref/impl/StringPref.kt
new file mode 100644
index 00000000..fe7a2326
--- /dev/null
+++ b/app/src/main/java/jp/juggler/subwaytooter/pref/impl/StringPref.kt
@@ -0,0 +1,20 @@
+package jp.juggler.subwaytooter.pref.impl
+
+import android.content.SharedPreferences
+import jp.juggler.util.optInt
+
+class StringPref(
+    key: String,
+    defVal: String,
+    val skipImport: Boolean = false,
+) : BasePref<String>(key, defVal) {
+
+    override operator fun invoke(pref: SharedPreferences): String =
+        pref.getString(key, defVal) ?: defVal
+
+    override fun put(editor: SharedPreferences.Editor, v: String) {
+        if (v == defVal) editor.remove(key) else editor.putString(key, v)
+    }
+
+    fun toInt(pref: SharedPreferences) = invoke(pref).optInt() ?: defVal.toInt()
+}
\ No newline at end of file
diff --git a/app/src/main/java/jp/juggler/subwaytooter/search/MspHelper.kt b/app/src/main/java/jp/juggler/subwaytooter/search/MspHelper.kt
index 8e3273f3..93e407be 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/search/MspHelper.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/search/MspHelper.kt
@@ -9,6 +9,8 @@ import jp.juggler.subwaytooter.api.entity.EntityId
 import jp.juggler.subwaytooter.api.entity.ServiceType
 import jp.juggler.subwaytooter.column.ColumnTask_Loading
 import jp.juggler.subwaytooter.column.ColumnTask_Refresh
+import jp.juggler.subwaytooter.pref.PrefS
+import jp.juggler.subwaytooter.pref.put
 import jp.juggler.util.*
 import okhttp3.Request
 
diff --git a/app/src/main/java/jp/juggler/subwaytooter/span/NetworkEmojiSpan.kt b/app/src/main/java/jp/juggler/subwaytooter/span/NetworkEmojiSpan.kt
index e515cc7a..aa9ceb7e 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/span/NetworkEmojiSpan.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/span/NetworkEmojiSpan.kt
@@ -8,7 +8,7 @@ import android.text.style.ReplacementSpan
 import androidx.annotation.IntRange
 import jp.juggler.apng.ApngFrames
 import jp.juggler.subwaytooter.App1
-import jp.juggler.subwaytooter.PrefB
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.util.LogCategory
 import java.lang.ref.WeakReference
 
diff --git a/app/src/main/java/jp/juggler/subwaytooter/streaming/StreamConnection.kt b/app/src/main/java/jp/juggler/subwaytooter/streaming/StreamConnection.kt
index 67feedf5..5a4d1fd8 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/streaming/StreamConnection.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/streaming/StreamConnection.kt
@@ -1,7 +1,7 @@
 package jp.juggler.subwaytooter.streaming
 
 import android.os.SystemClock
-import jp.juggler.subwaytooter.PrefB
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.subwaytooter.api.TootApiCallback
 import jp.juggler.subwaytooter.api.TootApiClient
 import jp.juggler.subwaytooter.api.TootApiResult
diff --git a/app/src/main/java/jp/juggler/subwaytooter/streaming/StreamManager.kt b/app/src/main/java/jp/juggler/subwaytooter/streaming/StreamManager.kt
index b1b5e5d2..7222e837 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/streaming/StreamManager.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/streaming/StreamManager.kt
@@ -2,7 +2,7 @@ package jp.juggler.subwaytooter.streaming
 
 import jp.juggler.subwaytooter.AppState
 import jp.juggler.subwaytooter.column.Column
-import jp.juggler.subwaytooter.PrefB
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.subwaytooter.api.TootApiCallback
 import jp.juggler.subwaytooter.api.TootApiClient
 import jp.juggler.subwaytooter.api.entity.Acct
diff --git a/app/src/main/java/jp/juggler/subwaytooter/util/AppOpener.kt b/app/src/main/java/jp/juggler/subwaytooter/util/AppOpener.kt
index 63a9ae07..127dd0f1 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/util/AppOpener.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/util/AppOpener.kt
@@ -15,6 +15,8 @@ import jp.juggler.subwaytooter.action.userProfile
 import jp.juggler.subwaytooter.api.entity.*
 import jp.juggler.subwaytooter.api.entity.TootStatus.Companion.findStatusIdFromUrl
 import jp.juggler.subwaytooter.api.entity.TootTag.Companion.findHashtagFromUrl
+import jp.juggler.subwaytooter.pref.PrefB
+import jp.juggler.subwaytooter.pref.pref
 import jp.juggler.subwaytooter.span.LinkInfo
 import jp.juggler.subwaytooter.table.SavedAccount
 import jp.juggler.util.*
diff --git a/app/src/main/java/jp/juggler/subwaytooter/util/CustomShare.kt b/app/src/main/java/jp/juggler/subwaytooter/util/CustomShare.kt
index b8f1b03b..6b4f9c6d 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/util/CustomShare.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/util/CustomShare.kt
@@ -5,7 +5,7 @@ import android.graphics.PorterDuff
 import android.graphics.drawable.Drawable
 import androidx.core.content.ContextCompat
 import jp.juggler.subwaytooter.App1
-import jp.juggler.subwaytooter.PrefS
+import jp.juggler.subwaytooter.pref.PrefS
 import jp.juggler.subwaytooter.R
 import jp.juggler.subwaytooter.api.entity.TootStatus
 import jp.juggler.subwaytooter.table.SavedAccount
diff --git a/app/src/main/java/jp/juggler/subwaytooter/util/EmojiDecoder.kt b/app/src/main/java/jp/juggler/subwaytooter/util/EmojiDecoder.kt
index f53c80dd..ba04279c 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/util/EmojiDecoder.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/util/EmojiDecoder.kt
@@ -7,12 +7,12 @@ import android.text.Spanned
 import android.util.SparseBooleanArray
 import androidx.annotation.DrawableRes
 import jp.juggler.subwaytooter.App1
-import jp.juggler.subwaytooter.PrefB
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.subwaytooter.R
 import jp.juggler.subwaytooter.emoji.CustomEmoji
 import jp.juggler.subwaytooter.emoji.EmojiMap
 import jp.juggler.subwaytooter.emoji.UnicodeEmoji
-import jp.juggler.subwaytooter.pref
+import jp.juggler.subwaytooter.pref.pref
 import jp.juggler.subwaytooter.span.EmojiImageSpan
 import jp.juggler.subwaytooter.span.HighlightSpan
 import jp.juggler.subwaytooter.span.NetworkEmojiSpan
diff --git a/app/src/main/java/jp/juggler/subwaytooter/util/HTMLDecoder.kt b/app/src/main/java/jp/juggler/subwaytooter/util/HTMLDecoder.kt
index 97d07ce0..d63058ed 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/util/HTMLDecoder.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/util/HTMLDecoder.kt
@@ -7,7 +7,7 @@ import android.text.SpannableStringBuilder
 import android.text.Spanned
 import android.text.style.*
 import jp.juggler.subwaytooter.App1
-import jp.juggler.subwaytooter.PrefB
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.subwaytooter.R
 import jp.juggler.subwaytooter.api.entity.*
 import jp.juggler.subwaytooter.mfm.MisskeyMarkdownDecoder
diff --git a/app/src/main/java/jp/juggler/subwaytooter/util/PostImpl.kt b/app/src/main/java/jp/juggler/subwaytooter/util/PostImpl.kt
index dd4c7bfb..cd2b650e 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/util/PostImpl.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/util/PostImpl.kt
@@ -4,7 +4,7 @@ import android.os.SystemClock
 import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
 import jp.juggler.subwaytooter.App1
-import jp.juggler.subwaytooter.PrefB
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.subwaytooter.R
 import jp.juggler.subwaytooter.Styler
 import jp.juggler.subwaytooter.api.*
diff --git a/app/src/main/java/jp/juggler/subwaytooter/util/PrivacyPolicyChecker.kt b/app/src/main/java/jp/juggler/subwaytooter/util/PrivacyPolicyChecker.kt
index 6376a32a..8ca7e5ab 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/util/PrivacyPolicyChecker.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/util/PrivacyPolicyChecker.kt
@@ -5,6 +5,9 @@ import android.content.SharedPreferences
 import androidx.annotation.RawRes
 import androidx.appcompat.app.AlertDialog
 import jp.juggler.subwaytooter.*
+import jp.juggler.subwaytooter.pref.PrefS
+import jp.juggler.subwaytooter.pref.pref
+import jp.juggler.subwaytooter.pref.put
 import jp.juggler.util.decodeUTF8
 import jp.juggler.util.digestSHA256
 import jp.juggler.util.encodeBase64Url
diff --git a/app/src/main/java/jp/juggler/subwaytooter/util/TootTextEncoder.kt b/app/src/main/java/jp/juggler/subwaytooter/util/TootTextEncoder.kt
index 0db0963c..f22db311 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/util/TootTextEncoder.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/util/TootTextEncoder.kt
@@ -5,7 +5,7 @@ import android.content.Intent
 import androidx.annotation.StringRes
 import jp.juggler.subwaytooter.ActText
 import jp.juggler.subwaytooter.App1
-import jp.juggler.subwaytooter.PrefB
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.subwaytooter.R
 import jp.juggler.subwaytooter.api.entity.*
 import jp.juggler.subwaytooter.table.SavedAccount
diff --git a/app/src/main/java/jp/juggler/subwaytooter/view/MyNetworkImageView.kt b/app/src/main/java/jp/juggler/subwaytooter/view/MyNetworkImageView.kt
index 9f3063a4..9b7d4734 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/view/MyNetworkImageView.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/view/MyNetworkImageView.kt
@@ -23,7 +23,7 @@ import com.bumptech.glide.load.resource.gif.MyGifDrawable
 import com.bumptech.glide.request.target.ImageViewTarget
 import com.bumptech.glide.request.target.Target
 import com.bumptech.glide.request.transition.Transition
-import jp.juggler.subwaytooter.PrefB
+import jp.juggler.subwaytooter.pref.PrefB
 import jp.juggler.util.LogCategory
 import jp.juggler.util.clipRange
 
diff --git a/app/src/main/java/jp/juggler/util/ViewUtils.kt b/app/src/main/java/jp/juggler/util/ViewUtils.kt
index c248c6c6..bde7b7e2 100644
--- a/app/src/main/java/jp/juggler/util/ViewUtils.kt
+++ b/app/src/main/java/jp/juggler/util/ViewUtils.kt
@@ -17,7 +17,7 @@ import androidx.annotation.ColorInt
 import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.widget.SwitchCompat
 import jp.juggler.subwaytooter.App1
-import jp.juggler.subwaytooter.PrefI
+import jp.juggler.subwaytooter.pref.PrefI
 import jp.juggler.subwaytooter.R
 import org.xmlpull.v1.XmlPullParser
 import kotlin.math.pow
diff --git a/app/src/main/res/values-ja/strings.xml b/app/src/main/res/values-ja/strings.xml
index fb627e6f..f4002e28 100644
--- a/app/src/main/res/values-ja/strings.xml
+++ b/app/src/main/res/values-ja/strings.xml
@@ -1099,4 +1099,5 @@
     <string name="account_picker_mute">どのアカウントで %1$s をミュートしますか\?</string>
     <string name="mfm_decoration_enabled">(Misskey)テキスト装飾を表示する</string>
     <string name="mfm_show_unsupported_markup">(Misskey)未対応のマークアップを表示する</string>
+    <string name="show_media_description">添付メディアの説明文を表示する</string>
 </resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index d405dcf4..b805fa27 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1110,4 +1110,5 @@
     <string name="many_window_post">Many window for post activity (experimental)</string>
     <string name="mfm_decoration_enabled">(Misskey)Show text decorations</string>
     <string name="mfm_show_unsupported_markup">(Misskey)Show unsupported markups</string>
+    <string name="show_media_description">Show media description</string>
 </resources>
diff --git a/build.gradle b/build.gradle
index 40123749..2b87e0e1 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,6 +1,6 @@
 buildscript {
 
-    ext.jvm_target = "14"
+    ext.jvm_target = "11"
 
     ext.min_sdk_version = 21
     ext.target_sdk_version = 31
diff --git a/colorpicker/build.gradle b/colorpicker/build.gradle
index 2e905646..7b8f3126 100644
--- a/colorpicker/build.gradle
+++ b/colorpicker/build.gradle
@@ -1,4 +1,5 @@
 apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android'
 
 android {
     compileSdkVersion compile_sdk_version
@@ -11,6 +12,7 @@ android {
     defaultConfig {
         targetSdkVersion target_sdk_version
         minSdkVersion min_sdk_version
+        vectorDrawables.useSupportLibrary = true
     }
 
 
@@ -19,6 +21,18 @@ android {
     }
 
     resourcePrefix "cpv_"
+
+    kotlinOptions {
+        jvmTarget = jvm_target
+        useIR = true
+        freeCompilerArgs += [
+                "-Xopt-in=kotlin.ExperimentalStdlibApi",
+                "-Xopt-in=kotlinx.coroutines.ExperimentalCoroutinesApi",
+                "-Xopt-in=kotlinx.serialization.ExperimentalSerializationApi",
+                "-Xopt-in=androidx.compose.foundation.ExperimentalFoundationApi",
+                "-Xopt-in=androidx.compose.animation.ExperimentalAnimationApi",
+        ]
+    }
 }
 
 dependencies {
diff --git a/emoji/build.gradle b/emoji/build.gradle
index 9d9da703..bd77e5b3 100644
--- a/emoji/build.gradle
+++ b/emoji/build.gradle
@@ -16,6 +16,7 @@ android {
         versionCode 1
         versionName "1.0"
         // testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+        vectorDrawables.useSupportLibrary = true
     }
 
     buildTypes {
@@ -25,6 +26,17 @@ android {
         }
     }
 
+    kotlinOptions {
+        jvmTarget = jvm_target
+        useIR = true
+        freeCompilerArgs += [
+                "-Xopt-in=kotlin.ExperimentalStdlibApi",
+                "-Xopt-in=kotlinx.coroutines.ExperimentalCoroutinesApi",
+                "-Xopt-in=kotlinx.serialization.ExperimentalSerializationApi",
+                "-Xopt-in=androidx.compose.foundation.ExperimentalFoundationApi",
+                "-Xopt-in=androidx.compose.animation.ExperimentalAnimationApi",
+        ]
+    }
 }
 
 dependencies {
diff --git a/sample_apng/build.gradle b/sample_apng/build.gradle
index 2b22fa10..8cc8ee49 100644
--- a/sample_apng/build.gradle
+++ b/sample_apng/build.gradle
@@ -18,7 +18,7 @@ android {
         versionName "1.0"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
-
+        vectorDrawables.useSupportLibrary = true
     }
 
     buildTypes {