diff --git a/V2rayNG/app/src/main/kotlin/com/v2ray/ang/extension/_Ext.kt b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/extension/_Ext.kt
index 91e3e9d8..2c2159aa 100644
--- a/V2rayNG/app/src/main/kotlin/com/v2ray/ang/extension/_Ext.kt
+++ b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/extension/_Ext.kt
@@ -77,8 +77,8 @@ val URLConnection.responseLength: Long
     get() = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) contentLengthLong else contentLength.toLong()
 
 val URI.idnHost: String
-    get() = (host!!).replace("[", "").replace("]", "")
+    get() = host!!.replace("[", "").replace("]", "")
 
 fun String.removeWhiteSpace(): String {
     return this.replace(" ", "")
-}
\ No newline at end of file
+}
diff --git a/V2rayNG/app/src/main/kotlin/com/v2ray/ang/service/V2RayServiceManager.kt b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/service/V2RayServiceManager.kt
index 08cab75c..5a00685c 100644
--- a/V2rayNG/app/src/main/kotlin/com/v2ray/ang/service/V2RayServiceManager.kt
+++ b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/service/V2RayServiceManager.kt
@@ -368,7 +368,7 @@ object V2RayServiceManager {
                         }
                         val directUplink = v2rayPoint.queryStats(TAG_DIRECT, "uplink")
                         val directDownlink = v2rayPoint.queryStats(TAG_DIRECT, "downlink")
-                        val zeroSpeed = (proxyTotal == 0L && directUplink == 0L && directDownlink == 0L)
+                        val zeroSpeed = proxyTotal == 0L && directUplink == 0L && directDownlink == 0L
                         if (!zeroSpeed || !lastZeroSpeed) {
                             if (proxyTotal == 0L) {
                                 appendSpeedString(text, outboundTags?.firstOrNull(), 0.0, 0.0)
diff --git a/V2rayNG/app/src/main/kotlin/com/v2ray/ang/ui/MainRecyclerAdapter.kt b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/ui/MainRecyclerAdapter.kt
index 49c70f01..1a990dad 100644
--- a/V2rayNG/app/src/main/kotlin/com/v2ray/ang/ui/MainRecyclerAdapter.kt
+++ b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/ui/MainRecyclerAdapter.kt
@@ -66,7 +66,7 @@ class MainRecyclerAdapter(val activity: MainActivity) : RecyclerView.Adapter<Mai
             holder.itemMainBinding.tvName.text = config.remarks
             holder.itemView.setBackgroundColor(Color.TRANSPARENT)
             holder.itemMainBinding.tvTestResult.text = aff?.getTestDelayString() ?: ""
-            if ((aff?.testDelayMillis ?: 0L) < 0L) {
+            if (aff?.testDelayMillis ?: 0L < 0L) {
                 holder.itemMainBinding.tvTestResult.setTextColor(ContextCompat.getColor(mActivity, R.color.colorPingRed))
             } else {
                 holder.itemMainBinding.tvTestResult.setTextColor(ContextCompat.getColor(mActivity, R.color.colorPing))
diff --git a/V2rayNG/app/src/main/kotlin/com/v2ray/ang/ui/PerAppProxyActivity.kt b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/ui/PerAppProxyActivity.kt
index 4b17e638..155f1316 100644
--- a/V2rayNG/app/src/main/kotlin/com/v2ray/ang/ui/PerAppProxyActivity.kt
+++ b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/ui/PerAppProxyActivity.kt
@@ -50,7 +50,7 @@ class PerAppProxyActivity : BaseActivity() {
                 .map {
                     if (blacklist != null) {
                         it.forEach { one ->
-                            if ((blacklist.contains(one.packageName))) {
+                            if (blacklist.contains(one.packageName)) {
                                 one.isSelected = 1
                             } else {
                                 one.isSelected = 0
diff --git a/V2rayNG/app/src/main/kotlin/com/v2ray/ang/ui/SettingsActivity.kt b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/ui/SettingsActivity.kt
index d38bf86d..8bb9bea2 100644
--- a/V2rayNG/app/src/main/kotlin/com/v2ray/ang/ui/SettingsActivity.kt
+++ b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/ui/SettingsActivity.kt
@@ -83,7 +83,7 @@ class SettingsActivity : BaseActivity() {
 
                 // It must be greater than 15 minutes because WorkManager couldn't run tasks under 15 minutes intervals
                 nval =
-                    if (TextUtils.isEmpty(nval) || (nval.toLong() < 15)) AppConfig.SUBSCRIPTION_DEFAULT_UPDATE_INTERVAL else nval
+                    if (TextUtils.isEmpty(nval) || nval.toLong() < 15) AppConfig.SUBSCRIPTION_DEFAULT_UPDATE_INTERVAL else nval
                 autoUpdateInterval?.summary = nval
                 configureUpdateTask(nval.toLong())
                 true
diff --git a/V2rayNG/app/src/main/kotlin/com/v2ray/ang/util/AngConfigManager.kt b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/util/AngConfigManager.kt
index fb68aab5..7d408fc6 100644
--- a/V2rayNG/app/src/main/kotlin/com/v2ray/ang/util/AngConfigManager.kt
+++ b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/util/AngConfigManager.kt
@@ -996,8 +996,8 @@ object AngConfigManager {
                         if (srv.inbounds != null && srv.outbounds != null && srv.routing != null) {
                             val config = ServerConfig.create(EConfigType.CUSTOM)
                             config.remarks = srv.remarks
-                                ?: ("%04d-".format(count + 1) + System.currentTimeMillis()
-                                    .toString())
+                                ?: "%04d-".format(count + 1) + System.currentTimeMillis()
+                                    .toString()
                             config.subscriptionId = subid
                             config.fullConfig = srv
                             val key = MmkvManager.encodeServerConfig("", config)
diff --git a/V2rayNG/app/src/main/kotlin/com/v2ray/ang/util/AppManagerUtil.kt b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/util/AppManagerUtil.kt
index b95b408b..03e38e93 100644
--- a/V2rayNG/app/src/main/kotlin/com/v2ray/ang/util/AppManagerUtil.kt
+++ b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/util/AppManagerUtil.kt
@@ -22,7 +22,7 @@ object AppManagerUtil {
 
             val appName = applicationInfo.loadLabel(packageManager).toString()
             val appIcon = applicationInfo.loadIcon(packageManager)
-            val isSystemApp = (applicationInfo.flags and ApplicationInfo.FLAG_SYSTEM) > 0
+            val isSystemApp = applicationInfo.flags and ApplicationInfo.FLAG_SYSTEM > 0
 
             val appInfo = AppInfo(appName, pkg.packageName, appIcon, isSystemApp, 0)
             apps.add(appInfo)
diff --git a/V2rayNG/app/src/main/kotlin/com/v2ray/ang/util/Utils.kt b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/util/Utils.kt
index faa2d91c..f2639db7 100644
--- a/V2rayNG/app/src/main/kotlin/com/v2ray/ang/util/Utils.kt
+++ b/V2rayNG/app/src/main/kotlin/com/v2ray/ang/util/Utils.kt
@@ -210,7 +210,7 @@ object Utils {
     }
 
     fun isPureIpAddress(value: String): Boolean {
-        return (isIpv4Address(value) || isIpv6Address(value))
+        return isIpv4Address(value) || isIpv6Address(value)
     }
 
     fun isIpv4Address(value: String): Boolean {