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 2c2159aa..9b764c0d 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
@@ -9,76 +9,61 @@ import org.json.JSONObject
 import java.net.URI
 import java.net.URLConnection
 
-/**
- * Some extensions
- */
-
 val Context.v2RayApplication: AngApplication
     get() = applicationContext as AngApplication
 
-fun Context.toast(message: Int): Toast = ToastCompat
-    .makeText(this, message, Toast.LENGTH_SHORT)
-    .apply {
-        show()
-    }
-
-fun Context.toast(message: CharSequence): Toast = ToastCompat
-    .makeText(this, message, Toast.LENGTH_SHORT)
-    .apply {
-        show()
-    }
-
-fun JSONObject.putOpt(pair: Pair<String, Any>) = putOpt(pair.first, pair.second)
-fun JSONObject.putOpt(pairs: Map<String, Any>) = pairs.forEach { putOpt(it.key to it.value) }
-
-const val threshold = 1000
-const val divisor = 1024F
-
-fun Long.toSpeedString() = toTrafficString() + "/s"
-
-fun Long.toTrafficString(): String {
-    if (this == 0L)
-        return "\t\t\t0\t  B"
-
-    if (this < threshold)
-        return "${this.toFloat().toShortString()}\t  B"
-
-    val kib = this / divisor
-    if (kib < threshold)
-        return "${kib.toShortString()}\t KB"
-
-    val mib = kib / divisor
-    if (mib < threshold)
-        return "${mib.toShortString()}\t MB"
-
-    val gib = mib / divisor
-    if (gib < threshold)
-        return "${gib.toShortString()}\t GB"
-
-    val tib = gib / divisor
-    if (tib < threshold)
-        return "${tib.toShortString()}\t TB"
-
-    val pib = tib / divisor
-    if (pib < threshold)
-        return "${pib.toShortString()}\t PB"
-
-    return "∞"
+fun Context.toast(message: Int) {
+    ToastCompat.makeText(this, message, Toast.LENGTH_SHORT).apply { show() }
 }
 
-private fun Float.toShortString(): String {
-    val s = "%.2f".format(this)
-    if (s.length <= 4)
-        return s
-    return s.substring(0, 4).removeSuffix(".")
+fun Context.toast(message: CharSequence) {
+    ToastCompat.makeText(this, message, Toast.LENGTH_SHORT).apply { show() }
+}
+
+fun JSONObject.putOpt(pair: Pair<String, Any?>) {
+    put(pair.first, pair.second)
+}
+
+fun JSONObject.putOpt(pairs: Map<String, Any?>) {
+    pairs.forEach { put(it.key, it.value) }
+}
+
+const val THRESHOLD = 1000L
+const val DIVISOR = 1024.0
+
+fun Long.toSpeedString(): String = this.toTrafficString() + "/s"
+
+fun Long.toTrafficString(): String {
+    if (this < THRESHOLD) {
+        return "$this B"
+    }
+    val kb = this / DIVISOR
+    if (kb < THRESHOLD) {
+        return "${String.format("%.1f KB", kb)}"
+    }
+    val mb = kb / DIVISOR
+    if (mb < THRESHOLD) {
+        return "${String.format("%.1f MB", mb)}"
+    }
+    val gb = mb / DIVISOR
+    if (gb < THRESHOLD) {
+        return "${String.format("%.1f GB", gb)}"
+    }
+    val tb = gb / DIVISOR
+    if (tb < THRESHOLD) {
+        return "${String.format("%.1f TB", tb)}"
+    }
+    return String.format("%.1f PB", tb / DIVISOR)
 }
 
 val URLConnection.responseLength: Long
-    get() = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) contentLengthLong else contentLength.toLong()
+    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(" ", "")
-}
+fun String.removeWhiteSpace(): String = replace("\\s+".toRegex(), "")