diff --git a/app/src/main/java/com/github/kr328/clash/BaseActivity.kt b/app/src/main/java/com/github/kr328/clash/BaseActivity.kt
index 0b01e1a..79c116a 100644
--- a/app/src/main/java/com/github/kr328/clash/BaseActivity.kt
+++ b/app/src/main/java/com/github/kr328/clash/BaseActivity.kt
@@ -63,8 +63,8 @@ abstract class BaseActivity : AppCompatActivity(), CoroutineScope by MainScope()
     var menu: Menu? = null
     lateinit var uiSettings: UiSettings
         private set
-    lateinit var language: String
-    lateinit var darkMode: String
+    private lateinit var language: String
+    private lateinit var darkMode: String
 
     open suspend fun onClashStarted() {}
     open suspend fun onClashStopped(reason: String?) {}
diff --git a/app/src/main/java/com/github/kr328/clash/Constants.kt b/app/src/main/java/com/github/kr328/clash/Constants.kt
index 9d9f0c9..a4a5caa 100644
--- a/app/src/main/java/com/github/kr328/clash/Constants.kt
+++ b/app/src/main/java/com/github/kr328/clash/Constants.kt
@@ -6,8 +6,6 @@ object Constants {
 
     const val LOG_DIR_NAME = "logs"
 
-    const val FILE_PROVIDER_AUTH = BuildConfig.APPLICATION_ID + ".files"
-
     const val URL_PROVIDER_TYPE_FILE = "file"
     const val URL_PROVIDER_TYPE_URL = "url"
     const val URL_PROVIDER_TYPE_EXTERNAL = "external"
diff --git a/app/src/main/java/com/github/kr328/clash/LogcatService.kt b/app/src/main/java/com/github/kr328/clash/LogcatService.kt
index 7256aa3..3891cd2 100644
--- a/app/src/main/java/com/github/kr328/clash/LogcatService.kt
+++ b/app/src/main/java/com/github/kr328/clash/LogcatService.kt
@@ -12,7 +12,6 @@ import android.os.Binder
 import android.os.Build
 import android.os.IBinder
 import android.os.IInterface
-import android.text.format.DateFormat
 import androidx.collection.CircularArray
 import androidx.core.app.NotificationCompat
 import androidx.core.app.NotificationManagerCompat
@@ -24,13 +23,14 @@ import com.github.kr328.clash.service.IClashManager
 import com.github.kr328.clash.service.ipc.IStreamCallback
 import com.github.kr328.clash.service.ipc.ParcelableContainer
 import com.github.kr328.clash.service.util.intent
+import com.github.kr328.clash.utils.format
 import com.github.kr328.clash.utils.logsDir
 import kotlinx.coroutines.*
 import kotlinx.coroutines.channels.Channel
 import kotlinx.coroutines.selects.select
 import java.io.FileWriter
 import java.io.IOException
-import java.lang.Exception
+import java.util.*
 import kotlin.math.max
 
 class LogcatService : Service(), CoroutineScope by MainScope(), IInterface {
@@ -184,10 +184,9 @@ class LogcatService : Service(), CoroutineScope by MainScope(), IInterface {
                 logsDir.mkdirs()
                 try {
                     FileWriter(logsDir.resolve(entity.fileName)).buffered().use { output ->
-                        val dateFormat = DateFormat.getDateFormat(this@LogcatService)
                         var offset = 0L
 
-                        output.write("# Logcat on ${dateFormat.format(entity.date)}")
+                        output.write("# Logcat on ${Date(entity.date).format(this@LogcatService)}")
                         output.newLine()
 
                         while (isActive) {
diff --git a/app/src/main/java/com/github/kr328/clash/LogsActivity.kt b/app/src/main/java/com/github/kr328/clash/LogsActivity.kt
index ac9d0d5..79dec24 100644
--- a/app/src/main/java/com/github/kr328/clash/LogsActivity.kt
+++ b/app/src/main/java/com/github/kr328/clash/LogsActivity.kt
@@ -4,7 +4,6 @@ import android.app.Activity
 import android.content.Intent
 import android.net.Uri
 import android.os.Bundle
-import android.text.format.DateFormat
 import android.util.TypedValue
 import android.view.ViewGroup
 import androidx.annotation.ColorInt
@@ -17,6 +16,7 @@ import com.github.kr328.clash.design.view.CommonUiLayout
 import com.github.kr328.clash.model.LogFile
 import com.github.kr328.clash.service.util.intent
 import com.github.kr328.clash.service.util.startForegroundServiceCompat
+import com.github.kr328.clash.utils.format
 import com.github.kr328.clash.utils.logsDir
 import com.google.android.material.bottomsheet.BottomSheetDialog
 import com.google.android.material.snackbar.Snackbar
@@ -228,10 +228,8 @@ class LogsActivity : BaseActivity() {
             return
 
         val d = Date(file.date)
-        val date = DateFormat.getDateFormat(this)
-        val time = DateFormat.getTimeFormat(this)
 
-        val exportName = getString(R.string.format_export_log_name, date.format(d), time.format(d))
+        val exportName = getString(R.string.format_export_log_name, d.format(this))
 
         val intent = Intent(Intent.ACTION_CREATE_DOCUMENT)
             .setType("text/plain")
diff --git a/app/src/main/java/com/github/kr328/clash/MainApplication.kt b/app/src/main/java/com/github/kr328/clash/MainApplication.kt
index 16ce9d3..dd869e0 100644
--- a/app/src/main/java/com/github/kr328/clash/MainApplication.kt
+++ b/app/src/main/java/com/github/kr328/clash/MainApplication.kt
@@ -2,16 +2,12 @@ package com.github.kr328.clash
 
 import android.app.Application
 import android.content.Context
-import android.content.res.Configuration
 import com.github.kr328.clash.core.Global
-import com.github.kr328.clash.core.utils.Log
-import com.github.kr328.clash.preference.UiSettings
 import com.github.kr328.clash.remote.Broadcasts
 import com.github.kr328.clash.remote.Remote
 import com.microsoft.appcenter.AppCenter
 import com.microsoft.appcenter.analytics.Analytics
 import com.microsoft.appcenter.crashes.Crashes
-import java.util.*
 
 @Suppress("unused")
 class MainApplication : Application() {
diff --git a/app/src/main/java/com/github/kr328/clash/PackagesActivity.kt b/app/src/main/java/com/github/kr328/clash/PackagesActivity.kt
index f6b8b8b..f8d5956 100644
--- a/app/src/main/java/com/github/kr328/clash/PackagesActivity.kt
+++ b/app/src/main/java/com/github/kr328/clash/PackagesActivity.kt
@@ -8,7 +8,6 @@ import android.view.View
 import androidx.appcompat.widget.SearchView
 import androidx.recyclerview.widget.LinearLayoutManager
 import com.github.kr328.clash.adapter.PackagesAdapter
-import com.github.kr328.clash.preference.UiSettings
 import com.github.kr328.clash.service.settings.ServiceSettings
 import kotlinx.android.synthetic.main.activity_access_control_packages.*
 import kotlinx.coroutines.*
diff --git a/app/src/main/java/com/github/kr328/clash/adapter/LogAdapter.kt b/app/src/main/java/com/github/kr328/clash/adapter/LogAdapter.kt
index d56062c..80410e8 100644
--- a/app/src/main/java/com/github/kr328/clash/adapter/LogAdapter.kt
+++ b/app/src/main/java/com/github/kr328/clash/adapter/LogAdapter.kt
@@ -1,7 +1,6 @@
 package com.github.kr328.clash.adapter
 
 import android.content.Context
-import android.text.format.DateFormat
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
@@ -9,6 +8,7 @@ import android.widget.TextView
 import androidx.recyclerview.widget.RecyclerView
 import com.github.kr328.clash.R
 import com.github.kr328.clash.core.event.LogEvent
+import com.github.kr328.clash.utils.format
 import java.util.*
 
 class LogAdapter(
@@ -19,11 +19,10 @@ class LogAdapter(
         private val level: TextView = view.findViewById(R.id.level)
         private val time: TextView = view.findViewById(R.id.time)
         private val payload: TextView = view.findViewById(R.id.payload)
-        private val timeFormat = DateFormat.getTimeFormat(view.context)
 
         fun bind(logEvent: LogEvent) {
             level.text = logEvent.level.toString()
-            time.text = timeFormat.format(Date(logEvent.time))
+            time.text = Date(logEvent.time).format(itemView.context, includeDate = false)
             payload.text = logEvent.message
         }
     }
diff --git a/app/src/main/java/com/github/kr328/clash/adapter/LogFileAdapter.kt b/app/src/main/java/com/github/kr328/clash/adapter/LogFileAdapter.kt
index 50f1229..167447b 100644
--- a/app/src/main/java/com/github/kr328/clash/adapter/LogFileAdapter.kt
+++ b/app/src/main/java/com/github/kr328/clash/adapter/LogFileAdapter.kt
@@ -1,7 +1,6 @@
 package com.github.kr328.clash.adapter
 
 import android.content.Context
-import android.text.format.DateFormat
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
@@ -9,6 +8,7 @@ import android.widget.TextView
 import androidx.recyclerview.widget.RecyclerView
 import com.github.kr328.clash.R
 import com.github.kr328.clash.model.LogFile
+import com.github.kr328.clash.utils.format
 import java.util.*
 
 class LogFileAdapter(
@@ -18,9 +18,6 @@ class LogFileAdapter(
 ) : RecyclerView.Adapter<LogFileAdapter.Holder>() {
     var fileList: List<LogFile> = emptyList()
 
-    private val dateFormat = DateFormat.getDateFormat(context)
-    private val timeFormat = DateFormat.getTimeFormat(context)
-
     class Holder(view: View) : RecyclerView.ViewHolder(view) {
         val root: View = view.findViewById(R.id.root)
         val fileName: TextView = view.findViewById(R.id.fileName)
@@ -47,8 +44,7 @@ class LogFileAdapter(
         val date = Date(current.date)
 
         holder.fileName.text = current.fileName
-        holder.date.text = context.getString(R.string.format_date_time,
-            dateFormat.format(date), timeFormat.format(date))
+        holder.date.text = date.format(context)
         holder.menu.setOnClickListener {
             onMenuClicked(current)
         }
diff --git a/app/src/main/java/com/github/kr328/clash/adapter/PackagesAdapter.kt b/app/src/main/java/com/github/kr328/clash/adapter/PackagesAdapter.kt
index 7c0a2ee..3d12061 100644
--- a/app/src/main/java/com/github/kr328/clash/adapter/PackagesAdapter.kt
+++ b/app/src/main/java/com/github/kr328/clash/adapter/PackagesAdapter.kt
@@ -10,7 +10,6 @@ import android.widget.TextView
 import androidx.recyclerview.widget.DiffUtil
 import androidx.recyclerview.widget.RecyclerView
 import com.github.kr328.clash.R
-import com.github.kr328.clash.core.utils.Log
 import com.google.android.material.checkbox.MaterialCheckBox
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
diff --git a/app/src/main/java/com/github/kr328/clash/preference/UiSettings.kt b/app/src/main/java/com/github/kr328/clash/preference/UiSettings.kt
index db7d783..b8a2524 100644
--- a/app/src/main/java/com/github/kr328/clash/preference/UiSettings.kt
+++ b/app/src/main/java/com/github/kr328/clash/preference/UiSettings.kt
@@ -20,7 +20,7 @@ class UiSettings(context: Context):
         val PROXY_GROUP_SORT = StringEntry("proxy_group_sort", PROXY_SORT_DEFAULT)
         val PROXY_PROXY_SORT = StringEntry("proxy_proxy_sort", PROXY_SORT_DEFAULT)
         val PROXY_LAST_SELECT_GROUP = StringEntry("proxy_last_select_group", "")
-        val PROXY_MERGE_PREFIX = BooleanEntry("proxy_merge_prefix", true)
+        val PROXY_MERGE_PREFIX = BooleanEntry("proxy_merge_prefix", false)
         val LANGUAGE = StringEntry("language", "")
         val DARK_MODE = StringEntry("dark_mode", DARK_MODE_AUTO)
     }
diff --git a/app/src/main/java/com/github/kr328/clash/remote/Broadcasts.kt b/app/src/main/java/com/github/kr328/clash/remote/Broadcasts.kt
index c832fbc..9bf335c 100644
--- a/app/src/main/java/com/github/kr328/clash/remote/Broadcasts.kt
+++ b/app/src/main/java/com/github/kr328/clash/remote/Broadcasts.kt
@@ -5,13 +5,10 @@ import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.Intent
 import android.content.IntentFilter
-import android.net.Uri
 import androidx.lifecycle.DefaultLifecycleObserver
 import androidx.lifecycle.LifecycleOwner
 import androidx.lifecycle.ProcessLifecycleOwner
-import com.github.kr328.clash.service.Constants
 import com.github.kr328.clash.service.Intents
-import com.github.kr328.clash.service.ServiceStatusProvider
 import com.github.kr328.clash.service.data.ClashProfileEntity
 
 object Broadcasts {
diff --git a/app/src/main/java/com/github/kr328/clash/remote/Channels.kt b/app/src/main/java/com/github/kr328/clash/remote/Channels.kt
deleted file mode 100644
index e1a800a..0000000
--- a/app/src/main/java/com/github/kr328/clash/remote/Channels.kt
+++ /dev/null
@@ -1,29 +0,0 @@
-package com.github.kr328.clash.remote
-
-import android.os.RemoteException
-import com.github.kr328.clash.core.event.LogEvent
-import com.github.kr328.clash.service.ipc.IStreamCallback
-import com.github.kr328.clash.service.ipc.ParcelableContainer
-import kotlinx.coroutines.channels.Channel
-
-class LogChannel : Channel<LogEvent> by Channel(Channel.CONFLATED) {
-    fun createCallback(): IStreamCallback {
-        return object : IStreamCallback.Stub() {
-            override fun complete() {
-                close()
-            }
-
-            override fun completeExceptionally(reason: String?) {
-                close(RemoteException(reason))
-            }
-
-            override fun send(data: ParcelableContainer?) {
-                try {
-                    offer(data!!.data!! as LogEvent)
-                } catch (e: Exception) {
-                    throw RemoteException(e.message)
-                }
-            }
-        }
-    }
-}
diff --git a/app/src/main/java/com/github/kr328/clash/settings/BehaviorFragment.kt b/app/src/main/java/com/github/kr328/clash/settings/BehaviorFragment.kt
index 1a54c2e..24ba512 100644
--- a/app/src/main/java/com/github/kr328/clash/settings/BehaviorFragment.kt
+++ b/app/src/main/java/com/github/kr328/clash/settings/BehaviorFragment.kt
@@ -2,7 +2,6 @@ package com.github.kr328.clash.settings
 
 import android.content.pm.PackageManager
 import android.os.Bundle
-import com.github.kr328.clash.BaseActivity
 import com.github.kr328.clash.OnBootReceiver
 import com.github.kr328.clash.R
 import com.github.kr328.clash.remote.Broadcasts
diff --git a/app/src/main/java/com/github/kr328/clash/utils/DateUtils.kt b/app/src/main/java/com/github/kr328/clash/utils/DateUtils.kt
new file mode 100644
index 0000000..ca87cd3
--- /dev/null
+++ b/app/src/main/java/com/github/kr328/clash/utils/DateUtils.kt
@@ -0,0 +1,25 @@
+package com.github.kr328.clash.utils
+
+import android.content.Context
+import java.text.SimpleDateFormat
+import java.util.*
+
+const val DATE_DATE_ONLY = "yyyy-MM-dd"
+const val DATE_TIME_ONLY = "HH:mm:ss"
+const val DATE_ALL = "$DATE_DATE_ONLY $DATE_TIME_ONLY"
+
+fun Date.format(context: Context, includeDate: Boolean = true, includeTime: Boolean = true, custom: String = ""): String {
+    val locale = context.resources.configuration.locales[0]
+
+    return when {
+        custom.isNotEmpty() ->
+            SimpleDateFormat(custom, locale).format(this)
+        includeDate && includeTime ->
+            SimpleDateFormat(DATE_ALL, locale).format(this)
+        includeDate ->
+            SimpleDateFormat(DATE_DATE_ONLY, locale).format(this)
+        includeTime ->
+            SimpleDateFormat(DATE_TIME_ONLY, locale).format(this)
+        else -> ""
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/github/kr328/clash/utils/IntervalUtils.kt b/app/src/main/java/com/github/kr328/clash/utils/IntervalUtils.kt
index f9eeade..f9e7199 100644
--- a/app/src/main/java/com/github/kr328/clash/utils/IntervalUtils.kt
+++ b/app/src/main/java/com/github/kr328/clash/utils/IntervalUtils.kt
@@ -2,7 +2,6 @@ package com.github.kr328.clash.utils
 
 import android.content.Context
 import com.github.kr328.clash.R
-import com.github.kr328.clash.core.Global
 
 object IntervalUtils {
     private const val MILLIS_SECOND = 1000L
diff --git a/app/src/main/java/com/github/kr328/clash/utils/PrefixMerger.kt b/app/src/main/java/com/github/kr328/clash/utils/PrefixMerger.kt
index 172da16..3365854 100644
--- a/app/src/main/java/com/github/kr328/clash/utils/PrefixMerger.kt
+++ b/app/src/main/java/com/github/kr328/clash/utils/PrefixMerger.kt
@@ -38,8 +38,9 @@ object PrefixMerger {
 
             for (group in groups) {
                 var diffIndex = 0
+                val size = group.map { it.first.length }.min() ?: 0
 
-                diff@ for (charIndex in group[0].first.indices) {
+                diff@ for (charIndex in 0 until size) {
                     for (stringIndex in 0 until (group.size - 1)) {
                         if (group[stringIndex].first[charIndex] != group[stringIndex + 1].first[charIndex])
                             break@diff
diff --git a/app/src/main/java/com/github/kr328/clash/utils/ProxySorter.kt b/app/src/main/java/com/github/kr328/clash/utils/ProxySorter.kt
index ae2ffdc..1e6f3c0 100644
--- a/app/src/main/java/com/github/kr328/clash/utils/ProxySorter.kt
+++ b/app/src/main/java/com/github/kr328/clash/utils/ProxySorter.kt
@@ -5,7 +5,7 @@ import com.github.kr328.clash.core.model.ProxyGroup
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 
-class ProxySorter(val groupOrder: Order, val proxyOrder: Order) {
+class ProxySorter(private val groupOrder: Order, private val proxyOrder: Order) {
     enum class Order {
         DEFAULT, DELAY_INCREASE, DELAY_DECREASE, NAME_INCREASE, NAME_DECREASE
     }
diff --git a/app/src/main/res/values-zh/strings.xml b/app/src/main/res/values-zh/strings.xml
index 5fa4221..550190d 100644
--- a/app/src/main/res/values-zh/strings.xml
+++ b/app/src/main/res/values-zh/strings.xml
@@ -46,9 +46,8 @@
     <string name="external">外部</string>
     <string name="file">文件</string>
     <string name="file_exported">文件已导出</string>
-    <string name="format_date_time">%s %s</string>
     <string name="format_days">%d 天</string>
-    <string name="format_export_log_name">%s %s.log</string>
+    <string name="format_export_log_name">%s.log</string>
     <string name="format_hours">%d 小时</string>
     <string name="format_minutes">%d 分钟</string>
     <string name="format_months">%d 月</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 474a7ff..586e603 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1,4 +1,4 @@
-<resources>
+<resources xmlns:tools="http://schemas.android.com/tools" tools:ignore="PluralsCandidate">
     <string name="launch_name">Clash</string>
     <string name="application_name">Clash for Android</string>
 
@@ -24,6 +24,7 @@
     <string name="unknown">Unknown</string>
 
     <string name="recently">Recently</string>
+
     <string name="format_seconds">%d seconds</string>
     <string name="format_minutes">%d minutes</string>
     <string name="format_hours">%d hours</string>
@@ -93,8 +94,7 @@
     <string name="clash_logcat">Clash Logcat</string>
     <string name="history">History</string>
     <string name="log_viewer">Log Viewer</string>
-    <string name="format_date_time">%s %s</string>
-    <string name="format_export_log_name">%s %s.log</string>
+    <string name="format_export_log_name">%s.log</string>
 
     <string name="delete_all_logs">Delete All Logs</string>
     <string name="delete_all_logs_warn">All historical logs will *LOST*</string>
diff --git a/build.gradle b/build.gradle
index 9001405..d3366d6 100644
--- a/build.gradle
+++ b/build.gradle
@@ -14,7 +14,7 @@ buildscript {
         gKotlinVersion = '1.3.61'
         gKotlinCoroutineVersion = '1.3.3'
         gKotlinSerializationVersion = '0.14.0'
-        gRoomVersion = '2.2.3'
+        gRoomVersion = '2.2.4'
         gAppCenterVersion = '2.5.1'
         gAndroidKtxVersion = "1.2.0"
         gLifecycleVersion = "2.2.0"
diff --git a/buildSrc/src/main/java/GolangBindTask.kt b/buildSrc/src/main/java/GolangBindTask.kt
index e091404..06e78b9 100644
--- a/buildSrc/src/main/java/GolangBindTask.kt
+++ b/buildSrc/src/main/java/GolangBindTask.kt
@@ -75,14 +75,14 @@ open class GolangBindTask : DefaultTask() {
 
     @TaskAction
     fun process() {
-        environment.put("GOPATH", goPath.absolutePath)
-        environment.put("ANDROID_HOME", findAndroidSdkPath().absolutePath)
-        environment.put("ANDROID_NDK_HOME", findAndroidNdkPath().absolutePath)
+        environment["GOPATH"] = goPath.absolutePath
+        environment["ANDROID_HOME"] = findAndroidSdkPath().absolutePath
+        environment["ANDROID_NDK_HOME"] = findAndroidNdkPath().absolutePath
 
         if (Os.isFamily(Os.FAMILY_WINDOWS))
-            environment.put("Path", System.getenv("Path") + ";" + goPath.resolve("bin"))
+            environment["Path"] = System.getenv("Path") + ";" + goPath.resolve("bin")
         else
-            environment.put("PATH", System.getenv("PATH") + ":" + goPath.resolve("bin"))
+            environment["PATH"] = System.getenv("PATH") + ":" + goPath.resolve("bin")
 
         goPath.resolve("src/github.com/kr328").deleteRecursively()
         goBindPath.deleteRecursively()
diff --git a/core/src/main/java/com/github/kr328/clash/core/Global.kt b/core/src/main/java/com/github/kr328/clash/core/Global.kt
index 43b6714..b27c2cc 100644
--- a/core/src/main/java/com/github/kr328/clash/core/Global.kt
+++ b/core/src/main/java/com/github/kr328/clash/core/Global.kt
@@ -1,11 +1,9 @@
 package com.github.kr328.clash.core
 
 import android.app.Application
-import android.content.res.Configuration
 
 object Global {
     lateinit var application: Application
-    val overrideConfiguration = Configuration()
 
     fun init(application: Application) {
         this.application = application
diff --git a/core/src/main/java/com/github/kr328/clash/core/event/ErrorEvent.kt b/core/src/main/java/com/github/kr328/clash/core/event/ErrorEvent.kt
deleted file mode 100644
index 4e7d805..0000000
--- a/core/src/main/java/com/github/kr328/clash/core/event/ErrorEvent.kt
+++ /dev/null
@@ -1,34 +0,0 @@
-package com.github.kr328.clash.core.event
-
-import android.os.Parcel
-import android.os.Parcelable
-import com.github.kr328.clash.core.serialization.Parcels
-import kotlinx.serialization.Serializable
-
-@Serializable
-data class ErrorEvent(val type: Type, val message: String) : Event, Parcelable {
-    enum class Type {
-        PROFILE_LOAD,
-        START_FAILURE,
-        QUERY_PROXY_FAILURE,
-        SET_PROXY_SELECTED
-    }
-
-    override fun writeToParcel(parcel: Parcel, flags: Int) {
-        Parcels.dump(serializer(), this, parcel)
-    }
-
-    override fun describeContents(): Int {
-        return 0
-    }
-
-    companion object CREATOR : Parcelable.Creator<ErrorEvent> {
-        override fun createFromParcel(parcel: Parcel): ErrorEvent {
-            return Parcels.load(serializer(), parcel)
-        }
-
-        override fun newArray(size: Int): Array<ErrorEvent?> {
-            return arrayOfNulls(size)
-        }
-    }
-}
\ No newline at end of file
diff --git a/core/src/main/java/com/github/kr328/clash/core/event/Event.kt b/core/src/main/java/com/github/kr328/clash/core/event/Event.kt
index 89cc9ca..31756e6 100644
--- a/core/src/main/java/com/github/kr328/clash/core/event/Event.kt
+++ b/core/src/main/java/com/github/kr328/clash/core/event/Event.kt
@@ -2,10 +2,4 @@ package com.github.kr328.clash.core.event
 
 import android.os.Parcelable
 
-interface Event : Parcelable {
-    companion object {
-        const val EVENT_LOG = 1
-        const val EVENT_TRAFFIC = 3
-        const val EVENT_BANDWIDTH = 4
-    }
-}
\ No newline at end of file
+interface Event : Parcelable
\ No newline at end of file
diff --git a/core/src/main/java/com/github/kr328/clash/core/event/LogEvent.kt b/core/src/main/java/com/github/kr328/clash/core/event/LogEvent.kt
index c4eaf8c..12e40b6 100644
--- a/core/src/main/java/com/github/kr328/clash/core/event/LogEvent.kt
+++ b/core/src/main/java/com/github/kr328/clash/core/event/LogEvent.kt
@@ -10,14 +10,12 @@ data class LogEvent(
     val level: Level,
     val message: String,
     val time: Long = System.currentTimeMillis()
-) :
-    Event {
+): Event {
     companion object {
         const val DEBUG_VALUE = "debug"
         const val INFO_VALUE = "info"
         const val WARN_VALUE = "warning"
         const val ERROR_VALUE = "error"
-        const val UNKNOWN_VALUE = "unknown"
 
         @JvmField
         val CREATOR = object : Parcelable.Creator<LogEvent> {
diff --git a/core/src/main/java/com/github/kr328/clash/core/event/TrafficEvent.kt b/core/src/main/java/com/github/kr328/clash/core/event/TrafficEvent.kt
deleted file mode 100644
index 630cfa9..0000000
--- a/core/src/main/java/com/github/kr328/clash/core/event/TrafficEvent.kt
+++ /dev/null
@@ -1,32 +0,0 @@
-package com.github.kr328.clash.core.event
-
-import android.os.Parcel
-import android.os.Parcelable
-import androidx.annotation.Keep
-import com.github.kr328.clash.core.serialization.Parcels
-import kotlinx.serialization.Serializable
-
-@Serializable
-data class TrafficEvent(val down: Long, val up: Long) : Event, Parcelable {
-    override fun writeToParcel(parcel: Parcel, flags: Int) {
-        Parcels.dump(serializer(), this, parcel)
-    }
-
-    override fun describeContents(): Int {
-        return 0
-    }
-
-    companion object {
-        @JvmField
-        @Keep
-        val CREATOR = object : Parcelable.Creator<TrafficEvent> {
-            override fun createFromParcel(parcel: Parcel): TrafficEvent {
-                return Parcels.load(serializer(), parcel)
-            }
-
-            override fun newArray(size: Int): Array<TrafficEvent?> {
-                return arrayOfNulls(size)
-            }
-        }
-    }
-}
\ No newline at end of file
diff --git a/core/src/main/java/com/github/kr328/clash/core/utils/Log.kt b/core/src/main/java/com/github/kr328/clash/core/utils/Log.kt
index c003b54..654235e 100644
--- a/core/src/main/java/com/github/kr328/clash/core/utils/Log.kt
+++ b/core/src/main/java/com/github/kr328/clash/core/utils/Log.kt
@@ -17,7 +17,4 @@ object Log {
 
     fun v(message: String, throwable: Throwable? = null) =
         android.util.Log.v(TAG, message, throwable)
-
-    fun wtf(message: String, throwable: Throwable? = null) =
-        android.util.Log.wtf(TAG, message, throwable)
 }
diff --git a/design/src/main/java/com/github/kr328/clash/design/common/CommonUiBuilder.kt b/design/src/main/java/com/github/kr328/clash/design/common/CommonUiBuilder.kt
index f0659e1..e84009d 100644
--- a/design/src/main/java/com/github/kr328/clash/design/common/CommonUiBuilder.kt
+++ b/design/src/main/java/com/github/kr328/clash/design/common/CommonUiBuilder.kt
@@ -2,7 +2,6 @@ package com.github.kr328.clash.design.common
 
 import android.content.Context
 import android.graphics.drawable.Drawable
-import android.view.View
 
 class CommonUiBuilder(val screen: CommonUiScreen) {
     val context: Context
@@ -84,15 +83,4 @@ class CommonUiBuilder(val screen: CommonUiScreen) {
 
         screen.addElement(tips)
     }
-
-    fun custom(
-        view: View,
-        setup: Custom.() -> Unit
-    ) {
-        val custom = Custom(screen, view)
-
-        setup(custom)
-
-        screen.addElement(custom)
-    }
 }
\ No newline at end of file
diff --git a/design/src/main/java/com/github/kr328/clash/design/common/Custom.kt b/design/src/main/java/com/github/kr328/clash/design/common/Custom.kt
deleted file mode 100644
index 96fb78a..0000000
--- a/design/src/main/java/com/github/kr328/clash/design/common/Custom.kt
+++ /dev/null
@@ -1,31 +0,0 @@
-package com.github.kr328.clash.design.common
-
-import android.os.Bundle
-import android.view.View
-
-class Custom(screen: CommonUiScreen, override val view: View): Base(screen) {
-    private var saveStateHandler: (Bundle) -> Unit = {}
-    private var restoreStateHandler: (Bundle) -> Unit = {}
-    private var applyAttributeHandler: (Boolean, Boolean) -> Unit =
-        { enable, hidden -> super.applyAttribute(enable, hidden)  }
-
-    fun onSaveState(handler: (Bundle) -> Unit) {
-        this.saveStateHandler = handler
-    }
-
-    fun onRestoreState(handler: (Bundle) -> Unit) {
-        this.restoreStateHandler = handler
-    }
-
-    fun onApplyAttribute(handler: (Boolean, Boolean) -> Unit) {
-        this.applyAttributeHandler = handler
-    }
-
-    override fun saveState(bundle: Bundle) {
-        saveStateHandler(bundle)
-    }
-
-    override fun restoreState(bundle: Bundle) {
-        restoreStateHandler(bundle)
-    }
-}
\ No newline at end of file
diff --git a/design/src/main/java/com/github/kr328/clash/design/common/TextInput.kt b/design/src/main/java/com/github/kr328/clash/design/common/TextInput.kt
index a9448c3..47b916e 100644
--- a/design/src/main/java/com/github/kr328/clash/design/common/TextInput.kt
+++ b/design/src/main/java/com/github/kr328/clash/design/common/TextInput.kt
@@ -2,7 +2,6 @@ package com.github.kr328.clash.design.common
 
 import android.graphics.drawable.Drawable
 import android.os.Bundle
-import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.widget.EditText
diff --git a/service/src/main/AndroidManifest.xml b/service/src/main/AndroidManifest.xml
index 08d3c13..39fb9f5 100644
--- a/service/src/main/AndroidManifest.xml
+++ b/service/src/main/AndroidManifest.xml
@@ -7,12 +7,10 @@
     <application>
         <service
             android:name="ClashService"
-            android:label="@string/clash_service_label"
             android:exported="false"
             android:process=":background" />
         <service
             android:name="TunService"
-            android:label="@string/tun_service_label"
             android:exported="false"
             android:process=":background"
             android:permission="android.permission.BIND_VPN_SERVICE">
@@ -22,17 +20,14 @@
         </service>
         <service
             android:name=".ClashManagerService"
-            android:label="@string/clash_manager_service_label"
             android:exported="false"
             android:process=":background" />
         <service
             android:name=".ProfileService"
-            android:label="@string/clash_profile_service_label"
             android:exported="false"
             android:process=":background" />
         <service
             android:name=".ProfileBackgroundService"
-            android:label="@string/clash_profile_service_label"
             android:exported="false"
             android:process=":background" />
 
diff --git a/service/src/main/java/com/github/kr328/clash/service/ProfileBackgroundService.kt b/service/src/main/java/com/github/kr328/clash/service/ProfileBackgroundService.kt
index 7d9d6db..b8edc06 100644
--- a/service/src/main/java/com/github/kr328/clash/service/ProfileBackgroundService.kt
+++ b/service/src/main/java/com/github/kr328/clash/service/ProfileBackgroundService.kt
@@ -1,9 +1,7 @@
 package com.github.kr328.clash.service
 
-import android.app.AlarmManager
 import android.app.NotificationChannel
 import android.app.NotificationManager
-import android.app.PendingIntent
 import android.content.ComponentName
 import android.content.Context
 import android.content.Intent
@@ -20,10 +18,8 @@ import com.github.kr328.clash.service.ipc.ParcelableContainer
 import com.github.kr328.clash.service.transact.ProfileRequest
 import com.github.kr328.clash.service.util.RandomUtils
 import com.github.kr328.clash.service.util.UpdateUtils
-import com.github.kr328.clash.service.util.componentName
 import com.github.kr328.clash.service.util.intent
 import kotlinx.coroutines.channels.Channel
-import kotlinx.coroutines.isActive
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.selects.select
 
diff --git a/service/src/main/java/com/github/kr328/clash/service/ProfileRequestReceiver.kt b/service/src/main/java/com/github/kr328/clash/service/ProfileRequestReceiver.kt
index fafa7a6..b7ae93f 100644
--- a/service/src/main/java/com/github/kr328/clash/service/ProfileRequestReceiver.kt
+++ b/service/src/main/java/com/github/kr328/clash/service/ProfileRequestReceiver.kt
@@ -3,10 +3,8 @@ package com.github.kr328.clash.service
 import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.Intent
-import android.os.Build
 import com.github.kr328.clash.service.transact.ProfileRequest
 import com.github.kr328.clash.service.util.componentName
-import com.github.kr328.clash.service.util.intent
 import com.github.kr328.clash.service.util.startForegroundServiceCompat
 
 class ProfileRequestReceiver : BroadcastReceiver() {
diff --git a/service/src/main/java/com/github/kr328/clash/service/ProfileService.kt b/service/src/main/java/com/github/kr328/clash/service/ProfileService.kt
index 511d8e1..21a63ca 100644
--- a/service/src/main/java/com/github/kr328/clash/service/ProfileService.kt
+++ b/service/src/main/java/com/github/kr328/clash/service/ProfileService.kt
@@ -1,7 +1,5 @@
 package com.github.kr328.clash.service
 
-import android.app.AlarmManager
-import android.app.PendingIntent
 import android.content.Intent
 import android.net.Uri
 import android.os.IBinder
diff --git a/service/src/main/java/com/github/kr328/clash/service/TunService.kt b/service/src/main/java/com/github/kr328/clash/service/TunService.kt
index ff014ff..c1a1d7c 100644
--- a/service/src/main/java/com/github/kr328/clash/service/TunService.kt
+++ b/service/src/main/java/com/github/kr328/clash/service/TunService.kt
@@ -9,7 +9,6 @@ import com.github.kr328.clash.service.settings.ServiceSettings
 import com.github.kr328.clash.service.util.broadcastNetworkChanged
 import kotlinx.coroutines.*
 import java.net.Inet6Address
-import java.net.InetAddress
 
 class TunService : VpnService(), CoroutineScope by MainScope() {
     companion object {
diff --git a/service/src/main/java/com/github/kr328/clash/service/net/DefaultNetworkChannel.kt b/service/src/main/java/com/github/kr328/clash/service/net/DefaultNetworkChannel.kt
index 6f9ab3f..b6d447b 100644
--- a/service/src/main/java/com/github/kr328/clash/service/net/DefaultNetworkChannel.kt
+++ b/service/src/main/java/com/github/kr328/clash/service/net/DefaultNetworkChannel.kt
@@ -2,9 +2,12 @@ package com.github.kr328.clash.service.net
 
 import android.content.Context
 import android.net.*
-import kotlinx.coroutines.*
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.channels.Channel
+import kotlinx.coroutines.launch
 import kotlinx.coroutines.sync.Mutex
+import kotlinx.coroutines.withContext
 import java.net.InetAddress
 
 class DefaultNetworkChannel(val context: Context, scope: CoroutineScope) :
diff --git a/service/src/main/res/values-zh/strings.xml b/service/src/main/res/values-zh/strings.xml
index 1e769e2..a5e792b 100644
--- a/service/src/main/res/values-zh/strings.xml
+++ b/service/src/main/res/values-zh/strings.xml
@@ -1,13 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <string name="clash_manager_service_label">Clash 管理器服务</string>
-    <string name="clash_profile_service_label">Clash 配置管理服务</string>
-    <string name="clash_service_label">Clash 核心服务</string>
     <string name="clash_service_status_channel">Clash 状态</string>
     <string name="profile_service_status_channel">配置服务状态</string>
     <string name="profile_status_channel">配置处理状态</string>
     <string name="running">正在运行</string>
-    <string name="tun_service_label">Tun 设备服务</string>
     <string name="format_in_queue">%d 个项目在队列中</string>
     <string name="format_update_complete">更新 %s 完成</string>
     <string name="format_update_failure">更新 %s 失败\\n%s</string>
diff --git a/service/src/main/res/values/strings.xml b/service/src/main/res/values/strings.xml
index 0752f8a..8082833 100644
--- a/service/src/main/res/values/strings.xml
+++ b/service/src/main/res/values/strings.xml
@@ -1,22 +1,14 @@
 <resources>
-    <string name="clash_service_status_channel">Clash Status</string>
-
     <!-- from https://github.com/shadowsocks/shadowsocks-android/blob/master/core/src/main/res/values/strings.xml -->
     <string name="clash_notification_content" translatable="false">"%1$s↑\t%2$s↓"</string>
 
+    <string name="clash_service_status_channel">Clash Status</string>
     <string name="profile_service_status_channel">Profile Service Status</string>
     <string name="processing_profiles">Processing Profiles</string>
     <string name="format_in_queue">%d items in Queue</string>
     <string name="process_result">Process Result</string>
     <string name="format_update_complete">Update %s Completed</string>
     <string name="format_update_failure">Update %s Failure\n%s</string>
-
     <string name="profile_status_channel">Profile Processing Status</string>
-
-    <string name="clash_service_label">Clash Core Service</string>
-    <string name="tun_service_label">Tun Device Service</string>
-    <string name="clash_manager_service_label">Clash Manager Service</string>
-    <string name="clash_profile_service_label">Clash Profile Manager Service</string>
-
     <string name="running">Running</string>
 </resources>