diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/AppConfig.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/AppConfig.kt
index 8f18da40..7613c318 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/AppConfig.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/AppConfig.kt
@@ -5,6 +5,7 @@ object AppConfig {
 
     /** The application's package name. */
     const val ANG_PACKAGE = BuildConfig.APPLICATION_ID
+    const val TAG = BuildConfig.APPLICATION_ID
 
     /** Directory names used in the app's file system. */
     const val DIR_ASSETS = "assets"
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/fmt/ShadowsocksFmt.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/fmt/ShadowsocksFmt.kt
index d32eeef7..fb383d25 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/fmt/ShadowsocksFmt.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/fmt/ShadowsocksFmt.kt
@@ -1,5 +1,7 @@
 package com.v2ray.ang.fmt
 
+import android.util.Log
+import com.v2ray.ang.AppConfig
 import com.v2ray.ang.dto.EConfigType
 import com.v2ray.ang.dto.NetworkType
 import com.v2ray.ang.dto.ProfileItem
@@ -82,7 +84,7 @@ object ShadowsocksFmt : FmtBase() {
                 config.remarks =
                     Utils.urlDecode(result.substring(indexSplit + 1, result.length))
             } catch (e: Exception) {
-                e.printStackTrace()
+                Log.e(AppConfig.TAG, "Failed to decode remarks in SS legacy URL", e)
             }
 
             result = result.substring(0, indexSplit)
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/fmt/VmessFmt.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/fmt/VmessFmt.kt
index b1a51979..c5ec4b12 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/fmt/VmessFmt.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/fmt/VmessFmt.kt
@@ -33,7 +33,7 @@ object VmessFmt : FmtBase() {
         var result = str.replace(EConfigType.VMESS.protocolScheme, "")
         result = Utils.decode(result)
         if (TextUtils.isEmpty(result)) {
-            Log.d(AppConfig.ANG_PACKAGE, "R.string.toast_decoding_failed")
+            Log.d(AppConfig.TAG, "R.string.toast_decoding_failed")
             return null
         }
         val vmessQRCode = JsonUtil.fromJson(result, VmessQRCode::class.java)
@@ -43,7 +43,7 @@ object VmessFmt : FmtBase() {
             || TextUtils.isEmpty(vmessQRCode.id)
             || TextUtils.isEmpty(vmessQRCode.net)
         ) {
-            Log.d(AppConfig.ANG_PACKAGE, "R.string.toast_incorrect_protocol")
+            Log.d(AppConfig.TAG, "R.string.toast_incorrect_protocol")
             return null
         }
 
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/handler/AngConfigManager.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/handler/AngConfigManager.kt
index 13bba449..2d520dde 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/handler/AngConfigManager.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/handler/AngConfigManager.kt
@@ -42,7 +42,7 @@ object AngConfigManager {
             Utils.setClipboard(context, conf)
 
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to share config to clipboard", e)
             return -1
         }
         return 0
@@ -71,7 +71,7 @@ object AngConfigManager {
             }
             return sb.lines().count()
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to share non-custom configs to clipboard", e)
             return -1
         }
     }
@@ -91,7 +91,7 @@ object AngConfigManager {
             return QRCodeDecoder.createQRCode(conf)
 
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to share config as QR code", e)
             return null
         }
     }
@@ -120,7 +120,7 @@ object AngConfigManager {
                 return -1
             }
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to share full content to clipboard", e)
             return -1
         }
         return 0
@@ -148,7 +148,7 @@ object AngConfigManager {
                 EConfigType.HYSTERIA2 -> Hysteria2Fmt.toUri(config)
             }
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to share config for GUID: $guid", e)
             return ""
         }
     }
@@ -203,7 +203,7 @@ object AngConfigManager {
                 }
             return count
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to parse batch subscription", e)
         }
         return 0
     }
@@ -251,7 +251,7 @@ object AngConfigManager {
                 }
             return count
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to parse batch config", e)
         }
         return 0
     }
@@ -287,7 +287,7 @@ object AngConfigManager {
                     return count
                 }
             } catch (e: Exception) {
-                e.printStackTrace()
+                Log.e(AppConfig.TAG, "Failed to parse custom config server JSON array", e)
             }
 
             try {
@@ -298,7 +298,7 @@ object AngConfigManager {
                 MmkvManager.encodeServerRaw(key, server)
                 return 1
             } catch (e: Exception) {
-                e.printStackTrace()
+                Log.e(AppConfig.TAG, "Failed to parse custom config server as single config", e)
             }
             return 0
         } else if (server.startsWith("[Interface]") && server.contains("[Peer]")) {
@@ -308,7 +308,7 @@ object AngConfigManager {
                 MmkvManager.encodeServerRaw(key, server)
                 return 1
             } catch (e: Exception) {
-                e.printStackTrace()
+                Log.e(AppConfig.TAG, "Failed to parse WireGuard config file", e)
             }
             return 0
         } else {
@@ -372,7 +372,7 @@ object AngConfigManager {
                 MmkvManager.setSelectServer(guid)
             }
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to parse config", e)
             return -1
         }
         return 0
@@ -390,7 +390,7 @@ object AngConfigManager {
                 count += updateConfigViaSub(it)
             }
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to update config via all subscriptions", e)
             return 0
         }
         return count
@@ -417,21 +417,20 @@ object AngConfigManager {
             if (!Utils.isValidUrl(url)) {
                 return 0
             }
-            Log.d(AppConfig.ANG_PACKAGE, url)
+            Log.d(AppConfig.TAG, url)
 
             var configText = try {
                 val httpPort = SettingsManager.getHttpPort()
                 HttpUtil.getUrlContentWithUserAgent(url, 15000, httpPort)
             } catch (e: Exception) {
-                Log.e(AppConfig.ANG_PACKAGE, "Update subscription: proxy not ready or other error, try……")
-                //e.printStackTrace()
+                Log.e(AppConfig.ANG_PACKAGE, "Update subscription: proxy not ready or other error, try……", e)
                 ""
             }
             if (configText.isEmpty()) {
                 configText = try {
                     HttpUtil.getUrlContentWithUserAgent(url)
                 } catch (e: Exception) {
-                    e.printStackTrace()
+                    Log.e(AppConfig.TAG, "Failed to get URL content with user agent", e)
                     ""
                 }
             }
@@ -440,7 +439,7 @@ object AngConfigManager {
             }
             return parseConfigViaSub(configText, it.first, false)
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to update config via subscription", e)
             return 0
         }
     }
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/handler/MigrateManager.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/handler/MigrateManager.kt
index ce1f2534..5687c8c9 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/handler/MigrateManager.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/handler/MigrateManager.kt
@@ -3,7 +3,6 @@ package com.v2ray.ang.handler
 import android.util.Log
 import com.tencent.mmkv.MMKV
 import com.v2ray.ang.AppConfig
-import com.v2ray.ang.AppConfig.ANG_PACKAGE
 import com.v2ray.ang.dto.EConfigType
 import com.v2ray.ang.dto.NetworkType
 import com.v2ray.ang.dto.ProfileItem
@@ -26,7 +25,7 @@ object MigrateManager {
             return false
         }
         val serverList = serverStorage.allKeys() ?: return false
-        Log.d(ANG_PACKAGE, "migrateServerConfig2Profile-" + serverList.count())
+        Log.d(AppConfig.TAG, "migrateServerConfig2Profile-" + serverList.count())
 
         for (guid in serverList) {
             var configOld = decodeServerConfigOld(guid) ?: continue
@@ -43,9 +42,9 @@ object MigrateManager {
             //check and remove old
             decodeServerConfig(guid) ?: continue
             serverStorage.remove(guid)
-            Log.d(ANG_PACKAGE, "migrateServerConfig2Profile-" + config.remarks)
+            Log.d(AppConfig.TAG, "migrateServerConfig2Profile-" + config.remarks)
         }
-        Log.d(ANG_PACKAGE, "migrateServerConfig2Profile-end")
+        Log.d(AppConfig.TAG, "migrateServerConfig2Profile-end")
         return true
     }
 
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/handler/MmkvManager.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/handler/MmkvManager.kt
index 3c489ddc..9b589dd0 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/handler/MmkvManager.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/handler/MmkvManager.kt
@@ -571,7 +571,7 @@ object MmkvManager {
      * @param startOnBoot Whether to start on boot.
      */
     fun encodeStartOnBoot(startOnBoot: Boolean) {
-        MmkvManager.encodeSettings(PREF_IS_BOOTED, startOnBoot)
+        encodeSettings(PREF_IS_BOOTED, startOnBoot)
     }
 
     /**
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/handler/SettingsManager.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/handler/SettingsManager.kt
index cb9256a0..ebcdd718 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/handler/SettingsManager.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/handler/SettingsManager.kt
@@ -84,7 +84,7 @@ object SettingsManager {
             resetRoutingRulesetsCommon(rulesetList)
             return true
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(ANG_PACKAGE, "Failed to reset routing rulesets", e)
             return false
         }
     }
@@ -167,11 +167,11 @@ object SettingsManager {
         }
 
         val guid = MmkvManager.getSelectServer() ?: return false
-        val config = MmkvManager.decodeServerConfig(guid) ?: return false
+        val config = decodeServerConfig(guid) ?: return false
         if (config.configType == EConfigType.CUSTOM) {
             val raw = MmkvManager.decodeServerRaw(guid) ?: return false
             val v2rayConfig = JsonUtil.fromJson(raw, V2rayConfig::class.java)
-            val exist = v2rayConfig.routing.rules.filter { it.outboundTag == TAG_DIRECT }?.any {
+            val exist = v2rayConfig.routing.rules.filter { it.outboundTag == TAG_DIRECT }.any {
                 it.domain?.contains(GEOSITE_PRIVATE) == true || it.ip?.contains(GEOIP_PRIVATE) == true
             }
             return exist == true
@@ -265,10 +265,7 @@ object SettingsManager {
                             input.copyTo(output)
                         }
                     }
-                    Log.i(
-                        ANG_PACKAGE,
-                        "Copied from apk assets folder to ${target.absolutePath}"
-                    )
+                    Log.d(AppConfig.TAG, "Copied from apk assets folder to ${target.absolutePath}")
                 }
         } catch (e: Exception) {
             Log.e(ANG_PACKAGE, "asset copy failed", e)
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/handler/SpeedtestManager.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/handler/SpeedtestManager.kt
index d607f0e5..dd85950f 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/handler/SpeedtestManager.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/handler/SpeedtestManager.kt
@@ -51,7 +51,7 @@ object SpeedtestManager {
         return try {
             Libv2ray.measureOutboundDelay(config, SettingsManager.getDelayTestUrl())
         } catch (e: Exception) {
-            Log.d(AppConfig.ANG_PACKAGE, "realPing: $e")
+            Log.d(AppConfig.TAG, "realPing: $e")
             -1L
         }
     }
@@ -76,7 +76,7 @@ object SpeedtestManager {
                 }
             }
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to ping URL: $url", e)
         }
         return "-1ms"
     }
@@ -103,11 +103,11 @@ object SpeedtestManager {
             socket.close()
             return time
         } catch (e: UnknownHostException) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Unknown host: $url", e)
         } catch (e: IOException) {
-            Log.d(AppConfig.ANG_PACKAGE, "socketConnectTime IOException: $e")
+            Log.d(AppConfig.TAG, "socketConnectTime IOException: $e")
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to establish socket connection to $url:$port", e)
         }
         return -1
     }
@@ -152,13 +152,13 @@ object SpeedtestManager {
                 )
             }
         } catch (e: IOException) {
-            Log.d(AppConfig.ANG_PACKAGE, "testConnection IOException: " + Log.getStackTraceString(e))
+            Log.d(AppConfig.TAG, "testConnection IOException: " + Log.getStackTraceString(e))
             result = context.getString(R.string.connection_test_error, e.message)
         } catch (e: Exception) {
-            Log.d(AppConfig.ANG_PACKAGE, "testConnection Exception: " + Log.getStackTraceString(e))
+            Log.d(AppConfig.TAG, "testConnection Exception: " + Log.getStackTraceString(e))
             result = context.getString(R.string.connection_test_error, e.message)
         } finally {
-            conn?.disconnect()
+            conn.disconnect()
         }
 
         return Pair(elapsed, result)
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/handler/V2rayConfigManager.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/handler/V2rayConfigManager.kt
index f4818584..c808515f 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/handler/V2rayConfigManager.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/handler/V2rayConfigManager.kt
@@ -4,7 +4,6 @@ import android.content.Context
 import android.text.TextUtils
 import android.util.Log
 import com.v2ray.ang.AppConfig
-import com.v2ray.ang.AppConfig.ANG_PACKAGE
 import com.v2ray.ang.AppConfig.DEFAULT_NETWORK
 import com.v2ray.ang.AppConfig.DNS_ALIDNS_ADDRESSES
 import com.v2ray.ang.AppConfig.DNS_ALIDNS_DOMAIN
@@ -70,7 +69,7 @@ object V2rayConfigManager {
                 getV2rayNormalConfig(context, guid, config)
             }
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to get V2ray config", e)
             return ConfigResult(false)
         }
     }
@@ -91,7 +90,7 @@ object V2rayConfigManager {
                 getV2rayNormalConfig4Speedtest(context, guid, config)
             }
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to get V2ray config for speedtest", e)
             return ConfigResult(false)
         }
     }
@@ -123,7 +122,7 @@ object V2rayConfigManager {
         val address = config.server ?: return result
         if (!Utils.isIpAddress(address)) {
             if (!Utils.isValidUrl(address)) {
-                Log.d(ANG_PACKAGE, "$address is an invalid ip or domain")
+                Log.d(AppConfig.TAG, "$address is an invalid ip or domain")
                 return result
             }
         }
@@ -173,7 +172,7 @@ object V2rayConfigManager {
         val address = config.server ?: return result
         if (!Utils.isIpAddress(address)) {
             if (!Utils.isValidUrl(address)) {
-                Log.d(ANG_PACKAGE, "$address is an invalid ip or domain")
+                Log.d(AppConfig.TAG, "$address is an invalid ip or domain")
                 return result
             }
         }
@@ -256,7 +255,7 @@ object V2rayConfigManager {
             }
 
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to configure inbounds", e)
             return false
         }
         return true
@@ -319,7 +318,7 @@ object V2rayConfigManager {
                 routingUserRule(key, v2rayConfig)
             }
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to configure routing", e)
             return false
         }
         return true
@@ -336,7 +335,7 @@ object V2rayConfigManager {
             v2rayConfig.routing.rules.add(rule)
 
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to apply routing user rule", e)
         }
     }
 
@@ -422,7 +421,7 @@ object V2rayConfigManager {
                 )
             )
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to configure custom local DNS", e)
             return false
         }
         return true
@@ -486,7 +485,7 @@ object V2rayConfigManager {
                     if (userHostsMap != null) hosts.putAll(userHostsMap)
                 }
             } catch (e: Exception) {
-                e.printStackTrace()
+                Log.e(AppConfig.TAG, "Failed to configure user DNS hosts", e)
             }
 
             //block dns
@@ -525,7 +524,7 @@ object V2rayConfigManager {
                 )
             }
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to configure DNS", e)
             return false
         }
         return true
@@ -596,7 +595,7 @@ object V2rayConfigManager {
 
 
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to update outbound with global settings", e)
             return false
         }
         return true
@@ -662,7 +661,7 @@ object V2rayConfigManager {
                     dialerProxy = TAG_FRAGMENT
                 )
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to update outbound fragment", e)
             return false
         }
         return true
@@ -725,7 +724,7 @@ object V2rayConfigManager {
                 }
             }
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to configure more outbounds", e)
             return returnPair
         }
 
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/receiver/TaskerReceiver.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/receiver/TaskerReceiver.kt
index eece9c3e..bdb7bf9a 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/receiver/TaskerReceiver.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/receiver/TaskerReceiver.kt
@@ -35,7 +35,7 @@ class TaskerReceiver : BroadcastReceiver() {
                 V2RayServiceManager.stopVService(context)
             }
         } catch (e: Exception) {
-            e.printStackTrace()
+            android.util.Log.e(AppConfig.TAG, "Error processing Tasker broadcast", e)
         }
     }
 }
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/service/ProcessService.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/service/ProcessService.kt
index fb8daa99..3db56134 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/service/ProcessService.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/service/ProcessService.kt
@@ -2,7 +2,7 @@ package com.v2ray.ang.service
 
 import android.content.Context
 import android.util.Log
-import com.v2ray.ang.AppConfig.ANG_PACKAGE
+import com.v2ray.ang.AppConfig
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
@@ -16,7 +16,7 @@ class ProcessService {
      * @param cmd The command to run.
      */
     fun runProcess(context: Context, cmd: MutableList<String>) {
-        Log.d(ANG_PACKAGE, cmd.toString())
+        Log.d(AppConfig.TAG, cmd.toString())
 
         try {
             val proBuilder = ProcessBuilder(cmd)
@@ -27,14 +27,14 @@ class ProcessService {
 
             CoroutineScope(Dispatchers.IO).launch {
                 Thread.sleep(50L)
-                Log.d(ANG_PACKAGE, "runProcess check")
+                Log.d(AppConfig.TAG, "runProcess check")
                 process?.waitFor()
-                Log.d(ANG_PACKAGE, "runProcess exited")
+                Log.d(AppConfig.TAG, "runProcess exited")
             }
-            Log.d(ANG_PACKAGE, process.toString())
+            Log.d(AppConfig.TAG, process.toString())
 
         } catch (e: Exception) {
-            Log.d(ANG_PACKAGE, e.toString())
+            Log.d(AppConfig.TAG, e.toString())
         }
     }
 
@@ -43,10 +43,10 @@ class ProcessService {
      */
     fun stopProcess() {
         try {
-            Log.d(ANG_PACKAGE, "runProcess destroy")
+            Log.d(AppConfig.TAG, "runProcess destroy")
             process?.destroy()
         } catch (e: Exception) {
-            Log.d(ANG_PACKAGE, e.toString())
+            Log.e(AppConfig.TAG, "Failed to destroy process", e)
         }
     }
 }
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/service/QSTileService.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/service/QSTileService.kt
index 02acd461..db12287d 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/service/QSTileService.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/service/QSTileService.kt
@@ -8,6 +8,7 @@ import android.graphics.drawable.Icon
 import android.os.Build
 import android.service.quicksettings.Tile
 import android.service.quicksettings.TileService
+import android.util.Log
 import androidx.annotation.RequiresApi
 import androidx.core.content.ContextCompat
 import com.v2ray.ang.AppConfig
@@ -61,7 +62,7 @@ class QSTileService : TileService() {
             applicationContext.unregisterReceiver(mMsgReceive)
             mMsgReceive = null
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to unregister receiver", e)
         }
 
     }
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/service/SubscriptionUpdater.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/service/SubscriptionUpdater.kt
index 0c6ed03e..3afdbc19 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/service/SubscriptionUpdater.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/service/SubscriptionUpdater.kt
@@ -38,7 +38,7 @@ object SubscriptionUpdater {
          */
         @SuppressLint("MissingPermission")
         override suspend fun doWork(): Result {
-            Log.d(AppConfig.ANG_PACKAGE, "subscription automatic update starting")
+            Log.d(AppConfig.TAG, "subscription automatic update starting")
 
             val subs = MmkvManager.decodeSubscriptions().filter { it.second.autoUpdate }
 
@@ -56,10 +56,7 @@ object SubscriptionUpdater {
                     notificationManager.createNotificationChannel(channel)
                 }
                 notificationManager.notify(3, notification.build())
-                Log.d(
-                    AppConfig.ANG_PACKAGE,
-                    "subscription automatic update: ---${subItem.remarks}"
-                )
+                Log.d(AppConfig.TAG, "subscription automatic update: ---${subItem.remarks}")
                 updateConfigViaSub(Pair(sub.first, subItem))
                 notification.setContentText("Updating ${subItem.remarks}")
             }
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/service/V2RayServiceManager.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/service/V2RayServiceManager.kt
index 48fef837..52d364c0 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/service/V2RayServiceManager.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/service/V2RayServiceManager.kt
@@ -9,7 +9,6 @@ import android.os.Build
 import android.util.Log
 import androidx.core.content.ContextCompat
 import com.v2ray.ang.AppConfig
-import com.v2ray.ang.AppConfig.ANG_PACKAGE
 import com.v2ray.ang.R
 import com.v2ray.ang.dto.EConfigType
 import com.v2ray.ang.dto.ProfileItem
@@ -144,7 +143,7 @@ object V2RayServiceManager {
             mFilter.addAction(Intent.ACTION_USER_PRESENT)
             ContextCompat.registerReceiver(service, mMsgReceive, mFilter, Utils.receiverFlags())
         } catch (e: Exception) {
-            Log.d(ANG_PACKAGE, e.toString())
+            Log.d(AppConfig.TAG, e.toString())
         }
 
         v2rayPoint.configureFileContent = result.content
@@ -154,7 +153,7 @@ object V2RayServiceManager {
         try {
             v2rayPoint.runLoop(MmkvManager.decodeSettingsBool(AppConfig.PREF_PREFER_IPV6))
         } catch (e: Exception) {
-            Log.d(ANG_PACKAGE, e.toString())
+            Log.d(AppConfig.TAG, e.toString())
         }
 
         if (v2rayPoint.isRunning) {
@@ -179,7 +178,7 @@ object V2RayServiceManager {
                 try {
                     v2rayPoint.stopLoop()
                 } catch (e: Exception) {
-                    Log.d(ANG_PACKAGE, e.toString())
+                    Log.d(AppConfig.TAG, e.toString())
                 }
             }
         }
@@ -190,7 +189,7 @@ object V2RayServiceManager {
         try {
             service.unregisterReceiver(mMsgReceive)
         } catch (e: Exception) {
-            Log.d(ANG_PACKAGE, e.toString())
+            Log.d(AppConfig.TAG, e.toString())
         }
         PluginUtil.stopPlugin()
     }
@@ -217,14 +216,14 @@ object V2RayServiceManager {
                 try {
                     time = v2rayPoint.measureDelay(SettingsManager.getDelayTestUrl())
                 } catch (e: Exception) {
-                    Log.d(ANG_PACKAGE, "measureV2rayDelay: $e")
+                    Log.d(AppConfig.TAG, "measureV2rayDelay: $e")
                     errstr = e.message?.substringAfter("\":") ?: "empty message"
                 }
                 if (time == -1L) {
                     try {
                         time = v2rayPoint.measureDelay(SettingsManager.getDelayTestUrl(true))
                     } catch (e: Exception) {
-                        Log.d(ANG_PACKAGE, "measureV2rayDelay: $e")
+                        Log.d(AppConfig.TAG, "measureV2rayDelay: $e")
                         errstr = e.message?.substringAfter("\":") ?: "empty message"
                     }
                 }
@@ -255,7 +254,7 @@ object V2RayServiceManager {
                 serviceControl.stopService()
                 0
             } catch (e: Exception) {
-                Log.d(ANG_PACKAGE, e.toString())
+                Log.d(AppConfig.TAG, e.toString())
                 -1
             }
         }
@@ -291,7 +290,7 @@ object V2RayServiceManager {
                 NotificationService.startSpeedNotification(currentConfig)
                 0
             } catch (e: Exception) {
-                Log.d(ANG_PACKAGE, e.toString())
+                Log.d(AppConfig.TAG, e.toString())
                 -1
             }
         }
@@ -323,12 +322,12 @@ object V2RayServiceManager {
                 }
 
                 AppConfig.MSG_STATE_STOP -> {
-                    Log.d(ANG_PACKAGE, "Stop Service")
+                    Log.d(AppConfig.TAG, "Stop Service")
                     serviceControl.stopService()
                 }
 
                 AppConfig.MSG_STATE_RESTART -> {
-                    Log.d(ANG_PACKAGE, "Restart Service")
+                    Log.d(AppConfig.TAG, "Restart Service")
                     serviceControl.stopService()
                     Thread.sleep(500L)
                     startVService(serviceControl.getService())
@@ -341,12 +340,12 @@ object V2RayServiceManager {
 
             when (intent?.action) {
                 Intent.ACTION_SCREEN_OFF -> {
-                    Log.d(ANG_PACKAGE, "SCREEN_OFF, stop querying stats")
+                    Log.d(AppConfig.TAG, "SCREEN_OFF, stop querying stats")
                     NotificationService.stopSpeedNotification(currentConfig)
                 }
 
                 Intent.ACTION_SCREEN_ON -> {
-                    Log.d(ANG_PACKAGE, "SCREEN_ON, start querying stats")
+                    Log.d(AppConfig.TAG, "SCREEN_ON, start querying stats")
                     NotificationService.startSpeedNotification(currentConfig)
                 }
             }
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/service/V2RayVpnService.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/service/V2RayVpnService.kt
index 69c1adb6..b78fb8ea 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/service/V2RayVpnService.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/service/V2RayVpnService.kt
@@ -18,7 +18,6 @@ import android.os.StrictMode
 import android.util.Log
 import androidx.annotation.RequiresApi
 import com.v2ray.ang.AppConfig
-import com.v2ray.ang.AppConfig.ANG_PACKAGE
 import com.v2ray.ang.AppConfig.LOOPBACK
 import com.v2ray.ang.BuildConfig
 import com.v2ray.ang.R
@@ -40,6 +39,7 @@ class V2RayVpnService : VpnService(), ServiceControl {
         private const val PRIVATE_VLAN6_CLIENT = "fc00::10:10:14:1"
         private const val PRIVATE_VLAN6_ROUTER = "fc00::10:10:14:2"
         private const val TUN2SOCKS = "libtun2socks.so"
+
     }
 
     private lateinit var mInterface: ParcelFileDescriptor
@@ -209,7 +209,7 @@ class V2RayVpnService : VpnService(), ServiceControl {
                     else
                         builder.addAllowedApplication(it)
                 } catch (e: PackageManager.NameNotFoundException) {
-                    Log.d(ANG_PACKAGE, "setup error : --${e.localizedMessage}")
+                    Log.d(AppConfig.TAG, "setup error : --${e.localizedMessage}")
                 }
             }
         } else {
@@ -227,7 +227,7 @@ class V2RayVpnService : VpnService(), ServiceControl {
             try {
                 connectivity.requestNetwork(defaultNetworkRequest, defaultNetworkCallback)
             } catch (e: Exception) {
-                e.printStackTrace()
+                Log.e(AppConfig.TAG, "Failed to request default network", e)
             }
         }
 
@@ -245,7 +245,7 @@ class V2RayVpnService : VpnService(), ServiceControl {
             return true
         } catch (e: Exception) {
             // non-nullable lateinit var
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to establish VPN interface", e)
             stopV2Ray()
         }
         return false
@@ -277,7 +277,7 @@ class V2RayVpnService : VpnService(), ServiceControl {
             cmd.add("--dnsgw")
             cmd.add("$LOOPBACK:${localDnsPort}")
         }
-        Log.d(packageName, cmd.toString())
+        Log.d(AppConfig.TAG, cmd.toString())
 
         try {
             val proBuilder = ProcessBuilder(cmd)
@@ -286,19 +286,19 @@ class V2RayVpnService : VpnService(), ServiceControl {
                 .directory(applicationContext.filesDir)
                 .start()
             Thread {
-                Log.d(packageName, "$TUN2SOCKS check")
+                Log.d(AppConfig.TAG, "$TUN2SOCKS check")
                 process.waitFor()
-                Log.d(packageName, "$TUN2SOCKS exited")
+                Log.d(AppConfig.TAG, "$TUN2SOCKS exited")
                 if (isRunning) {
-                    Log.d(packageName, "$TUN2SOCKS restart")
+                    Log.d(AppConfig.TAG, "$TUN2SOCKS restart")
                     runTun2socks()
                 }
             }.start()
-            Log.d(packageName, process.toString())
+            Log.d(AppConfig.TAG, process.toString())
 
             sendFd()
         } catch (e: Exception) {
-            Log.d(packageName, e.toString())
+            Log.d(AppConfig.TAG, e.toString())
         }
     }
 
@@ -309,13 +309,13 @@ class V2RayVpnService : VpnService(), ServiceControl {
     private fun sendFd() {
         val fd = mInterface.fileDescriptor
         val path = File(applicationContext.filesDir, "sock_path").absolutePath
-        Log.d(packageName, path)
+        Log.d(AppConfig.TAG, path)
 
         CoroutineScope(Dispatchers.IO).launch {
             var tries = 0
             while (true) try {
                 Thread.sleep(50L shl tries)
-                Log.d(packageName, "sendFd tries: $tries")
+                Log.d(AppConfig.TAG, "sendFd tries: $tries")
                 LocalSocket().use { localSocket ->
                     localSocket.connect(LocalSocketAddress(path, LocalSocketAddress.Namespace.FILESYSTEM))
                     localSocket.setFileDescriptorsForSend(arrayOf(fd))
@@ -323,7 +323,7 @@ class V2RayVpnService : VpnService(), ServiceControl {
                 }
                 break
             } catch (e: Exception) {
-                Log.d(packageName, e.toString())
+                Log.d(AppConfig.TAG, e.toString())
                 if (tries > 5) break
                 tries += 1
             }
@@ -349,10 +349,10 @@ class V2RayVpnService : VpnService(), ServiceControl {
         }
 
         try {
-            Log.d(packageName, "tun2socks destroy")
+            Log.d(AppConfig.TAG, "tun2socks destroy")
             process.destroy()
         } catch (e: Exception) {
-            Log.d(packageName, e.toString())
+            Log.d(AppConfig.TAG, e.toString())
         }
 
         V2RayServiceManager.stopV2rayPoint()
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/AboutActivity.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/AboutActivity.kt
index 18362be0..648996bc 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/AboutActivity.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/AboutActivity.kt
@@ -34,7 +34,7 @@ class AboutActivity : BaseActivity() {
                 try {
                     showFileChooser()
                 } catch (e: Exception) {
-                    e.printStackTrace()
+                    Log.e(AppConfig.TAG, "Failed to show file chooser", e)
                 }
             } else {
                 toast(R.string.toast_permission_denied)
@@ -90,7 +90,7 @@ class AboutActivity : BaseActivity() {
                 try {
                     showFileChooser()
                 } catch (e: Exception) {
-                    e.printStackTrace()
+                    Log.e(AppConfig.TAG, "Failed to show file chooser", e)
                 }
             } else {
                 requestPermissionLauncher.launch(permission)
@@ -106,7 +106,7 @@ class AboutActivity : BaseActivity() {
         }
 
         binding.layoutOssLicenses.setOnClickListener {
-            val webView = android.webkit.WebView(this);
+            val webView = android.webkit.WebView(this)
             webView.loadUrl("file:///android_asset/open_source_licenses.html")
             android.app.AlertDialog.Builder(this)
                 .setTitle("Open source licenses")
@@ -169,7 +169,7 @@ class AboutActivity : BaseActivity() {
         try {
             chooseFile.launch(Intent.createChooser(intent, getString(R.string.title_file_chooser)))
         } catch (ex: android.content.ActivityNotFoundException) {
-            Log.e(AppConfig.ANG_PACKAGE, "File chooser activity not found: ${ex.message}", ex)
+            Log.e(AppConfig.TAG, "File chooser activity not found", ex)
             toast(R.string.toast_require_file_manager)
         }
     }
@@ -192,7 +192,7 @@ class AboutActivity : BaseActivity() {
                         toastError(R.string.toast_failure)
                     }
                 } catch (e: Exception) {
-                    Log.e(AppConfig.ANG_PACKAGE, "Error during file restore: ${e.message}", e)
+                    Log.e(AppConfig.TAG, "Error during file restore", e)
                     toastError(R.string.toast_failure)
                 }
             }
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/LogcatActivity.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/LogcatActivity.kt
index 331ee169..436f5913 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/LogcatActivity.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/LogcatActivity.kt
@@ -2,12 +2,14 @@ package com.v2ray.ang.ui
 
 import android.annotation.SuppressLint
 import android.os.Bundle
+import android.util.Log
 import android.view.Menu
 import android.view.MenuItem
 import androidx.appcompat.widget.SearchView
 import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
+import com.v2ray.ang.AppConfig
 import com.v2ray.ang.AppConfig.ANG_PACKAGE
 import com.v2ray.ang.R
 import com.v2ray.ang.databinding.ActivityLogcatBinding
@@ -68,7 +70,7 @@ class LogcatActivity : BaseActivity(), SwipeRefreshLayout.OnRefreshListener {
                 }
             }
         } catch (e: IOException) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to get logcat", e)
         }
     }
 
@@ -89,7 +91,7 @@ class LogcatActivity : BaseActivity(), SwipeRefreshLayout.OnRefreshListener {
                 }
             }
         } catch (e: IOException) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to clear logcat", e)
         }
     }
 
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/LogcatRecyclerAdapter.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/LogcatRecyclerAdapter.kt
index 7f16634d..9883647d 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/LogcatRecyclerAdapter.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/LogcatRecyclerAdapter.kt
@@ -1,13 +1,16 @@
 package com.v2ray.ang.ui
 
+import android.util.Log
 import android.view.LayoutInflater
 import android.view.ViewGroup
 import androidx.recyclerview.widget.RecyclerView
+import com.v2ray.ang.AppConfig
 import com.v2ray.ang.databinding.ItemRecyclerLogcatBinding
 
 class LogcatRecyclerAdapter(val activity: LogcatActivity) : RecyclerView.Adapter<LogcatRecyclerAdapter.MainViewHolder>() {
     private var mActivity: LogcatActivity = activity
 
+
     override fun getItemCount() = mActivity.logsets.size
 
     override fun onBindViewHolder(holder: MainViewHolder, position: Int) {
@@ -22,7 +25,7 @@ class LogcatRecyclerAdapter(val activity: LogcatActivity) : RecyclerView.Adapter
                 holder.itemSubSettingBinding.logContent.text = if (content.count() > 1) content.last().trim() else ""
             }
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Error binding log data", e)
         }
     }
 
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/MainActivity.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/MainActivity.kt
index 71c528c0..0bb6315e 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/MainActivity.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/MainActivity.kt
@@ -9,6 +9,7 @@ import android.net.Uri
 import android.net.VpnService
 import android.os.Build
 import android.os.Bundle
+import android.util.Log
 import android.view.KeyEvent
 import android.view.Menu
 import android.view.MenuItem
@@ -485,7 +486,7 @@ class MainActivity : BaseActivity(), NavigationView.OnNavigationItemSelectedList
             val clipboard = Utils.getClipboard(this)
             importBatchConfig(clipboard)
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to import config from clipboard", e)
             return false
         }
         return true
@@ -515,7 +516,7 @@ class MainActivity : BaseActivity(), NavigationView.OnNavigationItemSelectedList
                     toastError(R.string.toast_failure)
                     binding.pbWaiting.hide()
                 }
-                e.printStackTrace()
+                Log.e(AppConfig.TAG, "Failed to import batch config", e)
             }
         }
     }
@@ -524,7 +525,7 @@ class MainActivity : BaseActivity(), NavigationView.OnNavigationItemSelectedList
         try {
             showFileChooser()
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to import config from local file", e)
             return false
         }
         return true
@@ -744,7 +745,7 @@ class MainActivity : BaseActivity(), NavigationView.OnNavigationItemSelectedList
                     importBatchConfig(input?.bufferedReader()?.readText())
                 }
             } catch (e: Exception) {
-                e.printStackTrace()
+                Log.e(AppConfig.TAG, "Failed to read content from URI", e)
             }
         } else {
             requestPermissionLauncher.launch(permission)
@@ -807,6 +808,7 @@ class MainActivity : BaseActivity(), NavigationView.OnNavigationItemSelectedList
                 Intent(this, SettingsActivity::class.java)
                     .putExtra("isRunning", mainViewModel.isRunning.value == true)
             )
+
             R.id.promotion -> Utils.openUri(this, "${Utils.decode(AppConfig.PromotionUrl)}?t=${System.currentTimeMillis()}")
             R.id.logcat -> startActivity(Intent(this, LogcatActivity::class.java))
             R.id.about -> startActivity(Intent(this, AboutActivity::class.java))
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/MainRecyclerAdapter.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/MainRecyclerAdapter.kt
index 8729355f..5c7af440 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/MainRecyclerAdapter.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/MainRecyclerAdapter.kt
@@ -3,6 +3,7 @@ package com.v2ray.ang.ui
 import android.content.Intent
 import android.graphics.Color
 import android.text.TextUtils
+import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
@@ -187,7 +188,7 @@ class MainRecyclerAdapter(val activity: MainActivity) : RecyclerView.Adapter<Mai
                     else -> mActivity.toast("else")
                 }
             } catch (e: Exception) {
-                e.printStackTrace()
+                Log.e(AppConfig.TAG, "Error occurred while sharing server information", e)
             }
         }.show()
     }
@@ -299,7 +300,7 @@ class MainRecyclerAdapter(val activity: MainActivity) : RecyclerView.Adapter<Mai
                         delay(500)
                         V2RayServiceManager.startVService(mActivity)
                     } catch (e: Exception) {
-                        e.printStackTrace()
+                        Log.e(AppConfig.TAG, "Failed to restart V2Ray service", e)
                     }
                 }
             }
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/PerAppProxyActivity.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/PerAppProxyActivity.kt
index 986fa1bc..f143f982 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/PerAppProxyActivity.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/PerAppProxyActivity.kt
@@ -31,6 +31,7 @@ class PerAppProxyActivity : BaseActivity() {
         ActivityBypassListBinding.inflate(layoutInflater)
     }
 
+
     private var adapter: PerAppProxyAdapter? = null
     private var appsAll: List<AppInfo>? = null
 
@@ -164,7 +165,7 @@ class PerAppProxyActivity : BaseActivity() {
                 content = HttpUtil.getUrlContent(url, 5000, httpPort) ?: ""
             }
             launch(Dispatchers.Main) {
-                Log.d(ANG_PACKAGE, content)
+                Log.d(AppConfig.TAG, content)
                 selectProxyApp(content, true)
                 toastSuccess(R.string.toast_success)
                 binding.pbWaiting.hide()
@@ -205,7 +206,7 @@ class PerAppProxyActivity : BaseActivity() {
                 adapter?.let { it ->
                     it.apps.forEach block@{
                         val packageName = it.packageName
-                        Log.d(ANG_PACKAGE, packageName)
+                        Log.d(AppConfig.TAG, packageName)
                         if (!inProxyApps(proxyApps, packageName, force)) {
                             adapter?.blacklist?.add(packageName)
                             println(packageName)
@@ -218,7 +219,7 @@ class PerAppProxyActivity : BaseActivity() {
                 adapter?.let { it ->
                     it.apps.forEach block@{
                         val packageName = it.packageName
-                        Log.d(ANG_PACKAGE, packageName)
+                        Log.d(AppConfig.TAG, packageName)
                         if (inProxyApps(proxyApps, packageName, force)) {
                             adapter?.blacklist?.add(packageName)
                             println(packageName)
@@ -229,7 +230,7 @@ class PerAppProxyActivity : BaseActivity() {
                 }
             }
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Error selecting proxy app", e)
             return false
         }
         return true
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/RoutingSettingActivity.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/RoutingSettingActivity.kt
index ddaf4a02..104e5049 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/RoutingSettingActivity.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/RoutingSettingActivity.kt
@@ -4,6 +4,7 @@ import android.Manifest
 import android.annotation.SuppressLint
 import android.content.Intent
 import android.os.Bundle
+import android.util.Log
 import android.view.Menu
 import android.view.MenuItem
 import android.view.View
@@ -110,7 +111,7 @@ class RoutingSettingActivity : BaseActivity() {
                             }
                         }
                     } catch (e: Exception) {
-                        e.printStackTrace()
+                        Log.e(AppConfig.TAG, "Failed to import predefined ruleset", e)
                     }
                 }
                 .setNegativeButton(android.R.string.cancel) { _, _ ->
@@ -126,7 +127,7 @@ class RoutingSettingActivity : BaseActivity() {
                 val clipboard = try {
                     Utils.getClipboard(this)
                 } catch (e: Exception) {
-                    e.printStackTrace()
+                    Log.e(AppConfig.TAG, "Failed to get clipboard content", e)
                     toastError(R.string.toast_failure)
                     return@setPositiveButton
                 }
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/ScannerActivity.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/ScannerActivity.kt
index 6702cdc1..2a971ac0 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/ScannerActivity.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/ScannerActivity.kt
@@ -6,6 +6,7 @@ import android.content.pm.PackageManager
 import android.graphics.BitmapFactory
 import android.os.Build
 import android.os.Bundle
+import android.util.Log
 import android.view.Menu
 import android.view.MenuItem
 import androidx.activity.result.contract.ActivityResultContracts
@@ -21,6 +22,7 @@ import io.github.g00fy2.quickie.config.ScannerConfig
 
 class ScannerActivity : BaseActivity() {
 
+
     private val scanQrCode = registerForActivityResult(ScanCustomCode(), ::handleResult)
     private val chooseFile = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) {
         val uri = it.data?.data
@@ -37,7 +39,7 @@ class ScannerActivity : BaseActivity() {
                     finished(text)
                 }
             } catch (e: Exception) {
-                e.printStackTrace()
+                Log.e(AppConfig.TAG, "Failed to decode QR code from file", e)
                 toast(R.string.toast_decoding_failed)
             }
         }
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/ServerActivity.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/ServerActivity.kt
index 9e88a7bd..53cfbdc2 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/ServerActivity.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/ServerActivity.kt
@@ -14,7 +14,6 @@ import android.widget.Spinner
 import android.widget.TextView
 import androidx.appcompat.app.AlertDialog
 import com.v2ray.ang.AppConfig
-import com.v2ray.ang.AppConfig.ANG_PACKAGE
 import com.v2ray.ang.AppConfig.DEFAULT_PORT
 import com.v2ray.ang.AppConfig.PREF_ALLOW_INSECURE
 import com.v2ray.ang.AppConfig.REALITY
@@ -481,7 +480,7 @@ class ServerActivity : BaseActivity() {
         if (config.subscriptionId.isEmpty() && !subscriptionId.isNullOrEmpty()) {
             config.subscriptionId = subscriptionId.orEmpty()
         }
-        Log.d(ANG_PACKAGE, JsonUtil.toJsonPretty(config) ?: "")
+        //Log.d(AppConfig.TAG, JsonUtil.toJsonPretty(config) ?: "")
         MmkvManager.encodeServerConfig(editGuid, config)
         toastSuccess(R.string.toast_success)
         finish()
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/ServerCustomConfigActivity.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/ServerCustomConfigActivity.kt
index 903ec410..44e0b32b 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/ServerCustomConfigActivity.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/ServerCustomConfigActivity.kt
@@ -2,11 +2,13 @@ package com.v2ray.ang.ui
 
 import android.os.Bundle
 import android.text.TextUtils
+import android.util.Log
 import android.view.Menu
 import android.view.MenuItem
 import androidx.appcompat.app.AlertDialog
 import com.blacksquircle.ui.editorkit.utils.EditorTheme
 import com.blacksquircle.ui.language.json.JsonLanguage
+import com.v2ray.ang.AppConfig
 import com.v2ray.ang.R
 import com.v2ray.ang.databinding.ActivityServerCustomConfigBinding
 import com.v2ray.ang.dto.EConfigType
@@ -76,7 +78,7 @@ class ServerCustomConfigActivity : BaseActivity() {
         val profileItem = try {
             CustomFmt.parse(binding.editor.text.toString())
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to parse custom configuration", e)
             toast("${getString(R.string.toast_malformed_josn)} ${e.cause?.message}")
             return false
         }
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/SubSettingRecyclerAdapter.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/SubSettingRecyclerAdapter.kt
index cec25272..bb364c1b 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/SubSettingRecyclerAdapter.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/SubSettingRecyclerAdapter.kt
@@ -3,11 +3,13 @@ package com.v2ray.ang.ui
 import android.content.Intent
 import android.graphics.Color
 import android.text.TextUtils
+import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import androidx.appcompat.app.AlertDialog
 import androidx.recyclerview.widget.RecyclerView
+import com.v2ray.ang.AppConfig
 import com.v2ray.ang.R
 import com.v2ray.ang.databinding.ItemQrcodeBinding
 import com.v2ray.ang.databinding.ItemRecyclerSubSettingBinding
@@ -81,7 +83,7 @@ class SubSettingRecyclerAdapter(val activity: SubSettingActivity) : RecyclerView
                                 else -> mActivity.toast("else")
                             }
                         } catch (e: Exception) {
-                            e.printStackTrace()
+                            Log.e(AppConfig.TAG, "Share subscription failed", e)
                         }
                     }.show()
             }
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/TaskerActivity.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/TaskerActivity.kt
index 7c5f7ee5..8600a4ee 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/TaskerActivity.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/TaskerActivity.kt
@@ -3,6 +3,7 @@ package com.v2ray.ang.ui
 import android.content.Intent
 import android.os.Bundle
 import android.text.TextUtils
+import android.util.Log
 import android.view.Menu
 import android.view.MenuItem
 import android.view.View
@@ -60,7 +61,7 @@ class TaskerActivity : BaseActivity() {
                 }
             }
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to initialize Tasker settings", e)
 
         }
     }
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/UrlSchemeActivity.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/UrlSchemeActivity.kt
index 264e19dc..66771be4 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/UrlSchemeActivity.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/UrlSchemeActivity.kt
@@ -5,6 +5,7 @@ import android.net.Uri
 import android.os.Bundle
 import android.util.Log
 import androidx.lifecycle.lifecycleScope
+import com.v2ray.ang.AppConfig
 import com.v2ray.ang.R
 import com.v2ray.ang.databinding.ActivityLogcatBinding
 import com.v2ray.ang.extension.toast
@@ -54,7 +55,7 @@ class UrlSchemeActivity : BaseActivity() {
             startActivity(Intent(this, MainActivity::class.java))
             finish()
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Error processing URL scheme", e)
         }
     }
 
@@ -62,7 +63,7 @@ class UrlSchemeActivity : BaseActivity() {
         if (uriString.isNullOrEmpty()) {
             return
         }
-        Log.d("UrlScheme", uriString)
+        Log.d(AppConfig.TAG, uriString)
 
         var decodedUrl = URLDecoder.decode(uriString, "UTF-8")
         val uri = Uri.parse(decodedUrl)
@@ -70,7 +71,7 @@ class UrlSchemeActivity : BaseActivity() {
             if (uri.fragment.isNullOrEmpty() && !fragment.isNullOrEmpty()) {
                 decodedUrl += "#${fragment}"
             }
-            Log.d("UrlScheme-decodedUrl", decodedUrl)
+            Log.d(AppConfig.TAG, decodedUrl)
             lifecycleScope.launch(Dispatchers.IO) {
                 val (count, countSub) = AngConfigManager.importBatchConfig(decodedUrl, "", false)
                 withContext(Dispatchers.Main) {
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/UserAssetActivity.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/UserAssetActivity.kt
index 387ea3e8..d08bc7d5 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/ui/UserAssetActivity.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/ui/UserAssetActivity.kt
@@ -44,6 +44,7 @@ import java.util.Date
 class UserAssetActivity : BaseActivity() {
     private val binding by lazy { ActivitySubSettingBinding.inflate(layoutInflater) }
 
+
     val extDir by lazy { File(Utils.userAssetPath(this)) }
     val builtInGeoFiles = arrayOf("geosite.dat", "geoip.dat")
 
@@ -163,7 +164,7 @@ class UserAssetActivity : BaseActivity() {
             }.also { cursor.close() }
         }
     } catch (e: Exception) {
-        e.printStackTrace()
+        Log.e(AppConfig.TAG, "Failed to get cursor name", e)
         null
     }
 
@@ -190,7 +191,7 @@ class UserAssetActivity : BaseActivity() {
                     .putExtra(UserAssetUrlActivity.ASSET_URL_QRCODE, url)
             )
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to import asset", e)
             return false
         }
         return true
@@ -229,7 +230,7 @@ class UserAssetActivity : BaseActivity() {
     private fun downloadGeo(item: AssetUrlItem, timeout: Int, httpPort: Int): Boolean {
         val targetTemp = File(extDir, item.remarks + "_temp")
         val target = File(extDir, item.remarks)
-        //Log.d(AppConfig.ANG_PACKAGE, url)
+        //Log.d(AppConfig.TAG, url)
 
         val conn = HttpUtil.createProxyConnection(item.url, httpPort, timeout, timeout, needStream = true) ?: return false
         try {
@@ -244,10 +245,10 @@ class UserAssetActivity : BaseActivity() {
             }
             return true
         } catch (e: Exception) {
-            Log.e(AppConfig.ANG_PACKAGE, Log.getStackTraceString(e))
+            Log.e(AppConfig.TAG, "Failed to download geo file", e)
             return false
         } finally {
-            conn?.disconnect()
+            conn.disconnect()
         }
     }
 
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/util/HttpUtil.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/util/HttpUtil.kt
index b8472167..b2a64777 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/util/HttpUtil.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/util/HttpUtil.kt
@@ -1,5 +1,7 @@
 package com.v2ray.ang.util
 
+import android.util.Log
+import com.v2ray.ang.AppConfig
 import com.v2ray.ang.AppConfig.LOOPBACK
 import com.v2ray.ang.BuildConfig
 import com.v2ray.ang.util.Utils.encode
@@ -10,6 +12,7 @@ import java.util.*
 
 object HttpUtil {
 
+
     /**
      * Converts a URL string to its ASCII representation.
      *
@@ -142,7 +145,7 @@ object HttpUtil {
                 )
             }
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to create proxy connection", e)
             // If an exception occurs, close the connection and return null
             conn?.disconnect()
             return null
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/util/JsonUtil.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/util/JsonUtil.kt
index 04e0e167..80a40fbf 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/util/JsonUtil.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/util/JsonUtil.kt
@@ -1,5 +1,6 @@
 package com.v2ray.ang.util
 
+import android.util.Log
 import com.google.gson.Gson
 import com.google.gson.GsonBuilder
 import com.google.gson.JsonObject
@@ -8,6 +9,7 @@ import com.google.gson.JsonPrimitive
 import com.google.gson.JsonSerializationContext
 import com.google.gson.JsonSerializer
 import com.google.gson.reflect.TypeToken
+import com.v2ray.ang.AppConfig
 import java.lang.reflect.Type
 
 object JsonUtil {
@@ -70,7 +72,7 @@ object JsonUtil {
         try {
             return JsonParser.parseString(src).getAsJsonObject()
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to parse JSON string", e)
             return null
         }
     }
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/util/MessageUtil.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/util/MessageUtil.kt
index 079e9138..eae9f5c6 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/util/MessageUtil.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/util/MessageUtil.kt
@@ -3,12 +3,14 @@ package com.v2ray.ang.util
 import android.content.ComponentName
 import android.content.Context
 import android.content.Intent
+import android.util.Log
 import com.v2ray.ang.AppConfig
 import com.v2ray.ang.service.V2RayTestService
 import java.io.Serializable
 
 object MessageUtil {
 
+
     /**
      * Sends a message to the service.
      *
@@ -46,7 +48,7 @@ object MessageUtil {
             intent.putExtra("content", content)
             ctx.startService(intent)
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to send message to test service", e)
         }
     }
 
@@ -67,7 +69,7 @@ object MessageUtil {
             intent.putExtra("content", content)
             ctx.sendBroadcast(intent)
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to send broadcast message", e)
         }
     }
 }
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/util/PluginUtil.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/util/PluginUtil.kt
index a4d62a7b..d531c03c 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/util/PluginUtil.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/util/PluginUtil.kt
@@ -3,7 +3,7 @@ package com.v2ray.ang.util
 import android.content.Context
 import android.os.SystemClock
 import android.util.Log
-import com.v2ray.ang.AppConfig.ANG_PACKAGE
+import com.v2ray.ang.AppConfig
 import com.v2ray.ang.dto.EConfigType
 import com.v2ray.ang.dto.ProfileItem
 import com.v2ray.ang.fmt.Hysteria2Fmt
@@ -13,7 +13,7 @@ import java.io.File
 
 object PluginUtil {
     private const val HYSTERIA2 = "libhysteria2.so"
-    private const val TAG = ANG_PACKAGE
+
     private val procService: ProcessService by lazy {
         ProcessService()
     }
@@ -26,7 +26,7 @@ object PluginUtil {
      * @param domainPort The domain and port information.
      */
     fun runPlugin(context: Context, config: ProfileItem?, domainPort: String?) {
-        Log.d(TAG, "runPlugin")
+        Log.d(AppConfig.TAG, "runPlugin")
 
         if (config?.configType?.equals(EConfigType.HYSTERIA2) == true) {
             val configFile = genConfigHy2(context, config, domainPort) ?: return
@@ -51,7 +51,7 @@ object PluginUtil {
      * @return The ping delay in milliseconds, or -1 if it fails.
      */
     fun realPingHy2(context: Context, config: ProfileItem?): Long {
-        Log.d(TAG, "realPingHy2")
+        Log.d(AppConfig.TAG, "realPingHy2")
         val retFailure = -1L
 
         if (config?.configType?.equals(EConfigType.HYSTERIA2) == true) {
@@ -79,18 +79,18 @@ object PluginUtil {
      * @return The generated configuration file.
      */
     private fun genConfigHy2(context: Context, config: ProfileItem, domainPort: String?): File? {
-        Log.d(TAG, "runPlugin $HYSTERIA2")
+        Log.d(AppConfig.TAG, "runPlugin $HYSTERIA2")
 
         val socksPort = domainPort?.split(":")?.last()
             .let { if (it.isNullOrEmpty()) return null else it.toInt() }
         val hy2Config = Hysteria2Fmt.toNativeConfig(config, socksPort) ?: return null
 
         val configFile = File(context.noBackupFilesDir, "hy2_${SystemClock.elapsedRealtime()}.json")
-        Log.d(TAG, "runPlugin ${configFile.absolutePath}")
+        Log.d(AppConfig.TAG, "runPlugin ${configFile.absolutePath}")
 
         configFile.parentFile?.mkdirs()
         configFile.writeText(JsonUtil.toJson(hy2Config))
-        Log.d(TAG, JsonUtil.toJson(hy2Config))
+        Log.d(AppConfig.TAG, JsonUtil.toJson(hy2Config))
 
         return configFile
     }
@@ -119,10 +119,10 @@ object PluginUtil {
      */
     private fun stopHy2() {
         try {
-            Log.d(TAG, "$HYSTERIA2 destroy")
+            Log.d(AppConfig.TAG, "$HYSTERIA2 destroy")
             procService?.stopProcess()
         } catch (e: Exception) {
-            Log.d(TAG, e.toString())
+            Log.e(AppConfig.TAG, "Failed to stop Hysteria2 process", e)
         }
     }
 }
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/util/Utils.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/util/Utils.kt
index 25cd1594..d83a9989 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/util/Utils.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/util/Utils.kt
@@ -118,12 +118,12 @@ object Utils {
         try {
             return Base64.decode(text, Base64.NO_WRAP).toString(Charsets.UTF_8)
         } catch (e: Exception) {
-            Log.w(AppConfig.TAG, "Failed to decode standard base64", e)
+            Log.e(AppConfig.TAG, "Failed to decode standard base64", e)
         }
         try {
             return Base64.decode(text, Base64.NO_WRAP.or(Base64.URL_SAFE)).toString(Charsets.UTF_8)
         } catch (e: Exception) {
-            Log.w(AppConfig.TAG, "Failed to decode URL-safe base64", e)
+            Log.e(AppConfig.TAG, "Failed to decode URL-safe base64", e)
         }
         return null
     }
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/util/ZipUtil.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/util/ZipUtil.kt
index 62677c5d..9d9dce62 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/util/ZipUtil.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/util/ZipUtil.kt
@@ -1,5 +1,7 @@
 package com.v2ray.ang.util
 
+import android.util.Log
+import com.v2ray.ang.AppConfig
 import java.io.BufferedOutputStream
 import java.io.File
 import java.io.FileInputStream
@@ -61,7 +63,7 @@ object ZipUtil {
             zos.closeEntry()
             zos.close()
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to zip folder", e)
             return false
         }
         return true
@@ -97,7 +99,7 @@ object ZipUtil {
                 }
             }
         } catch (e: Exception) {
-            e.printStackTrace()
+            Log.e(AppConfig.TAG, "Failed to unzip file", e)
             return false
         }
         return true
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/viewmodel/MainViewModel.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/viewmodel/MainViewModel.kt
index ebdc37a2..665acb55 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/viewmodel/MainViewModel.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/viewmodel/MainViewModel.kt
@@ -13,7 +13,6 @@ import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.viewModelScope
 import com.v2ray.ang.AngApplication
 import com.v2ray.ang.AppConfig
-import com.v2ray.ang.AppConfig.ANG_PACKAGE
 import com.v2ray.ang.R
 import com.v2ray.ang.dto.ProfileItem
 import com.v2ray.ang.dto.ServersCache
@@ -63,7 +62,7 @@ class MainViewModel(application: Application) : AndroidViewModel(application) {
         getApplication<AngApplication>().unregisterReceiver(mMsgReceiver)
         tcpingTestScope.coroutineContext[Job]?.cancelChildren()
         SpeedtestManager.closeAllTcpSockets()
-        Log.i(ANG_PACKAGE, "Main ViewModel is cleared")
+        Log.d(AppConfig.TAG, "Main ViewModel is cleared")
         super.onCleared()
     }
 
diff --git a/V2rayNG/app/src/main/java/com/v2ray/ang/viewmodel/SettingsViewModel.kt b/V2rayNG/app/src/main/java/com/v2ray/ang/viewmodel/SettingsViewModel.kt
index 995573d1..115f811c 100644
--- a/V2rayNG/app/src/main/java/com/v2ray/ang/viewmodel/SettingsViewModel.kt
+++ b/V2rayNG/app/src/main/java/com/v2ray/ang/viewmodel/SettingsViewModel.kt
@@ -26,7 +26,7 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
     override fun onCleared() {
         PreferenceManager.getDefaultSharedPreferences(getApplication())
             .unregisterOnSharedPreferenceChangeListener(this)
-        Log.i(AppConfig.ANG_PACKAGE, "Settings ViewModel is cleared")
+        Log.d(AppConfig.TAG, "Settings ViewModel is cleared")
         super.onCleared()
     }
 
@@ -36,7 +36,7 @@ class SettingsViewModel(application: Application) : AndroidViewModel(application
      * @param key The key of the changed preference.
      */
     override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences, key: String?) {
-        Log.d(AppConfig.ANG_PACKAGE, "Observe settings changed: $key")
+        Log.d(AppConfig.TAG, "Observe settings changed: $key")
         when (key) {
             AppConfig.PREF_MODE,
             AppConfig.PREF_VPN_DNS,