Add network traffic display in profile selector

src/main/res/values-zh/strings.xml

@@ -74,6 +74,10 @@
 
   <string name="stat">网络流量</string>
   <string name="stat_summary">发送:\t%1$s\t|\t接收:\t%2$s\n上传:\t%3$s\t|\t下载:\t%4$s</string>
+  <string name="stat_profiles">\n发送:\t%1$s\t|\t接收:\t%2$s</string>
+  <plurals name="bytes">
+    <item quantity="other">字节</item>
+  </plurals>
 
   <!-- profile -->
   <string name="add_profile_dialog">为影梭添加此配置文件？</string>

src/main/res/values/strings.xml

@@ -14,6 +14,11 @@
   <string name="nat_summary_no_root">NAT mode is disabled without root</string>
   <string name="stat">Network Traffic</string>
   <string name="stat_summary">Send: \t%1$s\t|\tReceive: \t%2$s\nUpload: \t%3$s\t|\tDownload: \t%4$s</string>
+  <string name="stat_profiles">\nSend: \t%1$s\t|\tReceive: \t%2$s</string>
+  <plurals name="bytes">
+    <item quantity="one">Byte</item>
+    <item quantity="other">Bytes</item>
+  </plurals>
 
   <!-- proxy category -->
   <string name="proxy_cat">Server Settings</string>

src/main/scala/com/github/shadowsocks/ProfileManagerActivity.scala

@@ -10,11 +10,13 @@ import android.support.v7.widget.Toolbar.OnMenuItemClickListener
 import android.support.v7.widget.helper.ItemTouchHelper
 import android.support.v7.widget.helper.ItemTouchHelper.SimpleCallback
 import android.support.v7.widget.{DefaultItemAnimator, LinearLayoutManager, RecyclerView, Toolbar}
+import android.text.style.TextAppearanceSpan
+import android.text.{Spanned, SpannableStringBuilder}
 import android.view.View.{OnAttachStateChangeListener, OnClickListener}
 import android.view.{LayoutInflater, MenuItem, View, ViewGroup}
 import android.widget.{LinearLayout, ImageView, CheckedTextView, Toast}
 import com.github.shadowsocks.database.Profile
-import com.github.shadowsocks.utils.{Parser, Utils}
+import com.github.shadowsocks.utils.{TrafficMonitor, Parser, Utils}
 import com.google.zxing.integration.android.IntentIntegrator
 import net.glxn.qrgen.android.QRCode
 
@@ -54,10 +56,21 @@ class ProfileManagerActivity extends AppCompatActivity with OnMenuItemClickListe
       })
     }
 
+    def updateText() {
+      val builder = new SpannableStringBuilder
+      builder.append(item.name)
+      val start = builder.length
+      builder.append(getString(R.string.stat_profiles,
+        TrafficMonitor.formatTraffic(item.tx), TrafficMonitor.formatTraffic(item.rx)))
+      builder.setSpan(new TextAppearanceSpan(ProfileManagerActivity.this, android.R.style.TextAppearance_Small),
+        start + 1, builder.length, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
+      text.setText(builder)
+    }
+
     def bind(item: Profile) {
-      text.setText(item.name)
-      text.setChecked(item.id == ShadowsocksApplication.profileId)
       this.item = item
+      updateText()
+      text.setChecked(item.id == ShadowsocksApplication.profileId)
     }
 
     def onClick(v: View) = {

src/main/scala/com/github/shadowsocks/utils/TrafficMonitor.scala

@@ -1,10 +1,11 @@
 package com.github.shadowsocks.utils
 
 import java.lang.{Math, System}
-import java.util.Locale
+import java.text.DecimalFormat
 
 import android.net.TrafficStats
 import android.os.Process
+import com.github.shadowsocks.{R, ShadowsocksApplication}
 
 case class Traffic(tx: Long, rx: Long, timestamp: Long)
 
@@ -25,18 +26,17 @@ object TrafficMonitor {
       Math.max(TrafficStats.getTotalRxBytes - TrafficStats.getUidRxBytes(uid), 0), System.currentTimeMillis())
   }
 
-  def formatTraffic(n: Long): String = {
-    if (n <= 1024) {
-      "%d KB".formatLocal(Locale.ENGLISH, n)
-    } else if (n > 1024) {
-      "%d MB".formatLocal(Locale.ENGLISH, n / 1024)
-    } else if (n > 1024 * 1024) {
-      "%d GB".formatLocal(Locale.ENGLISH, n / 1024 / 1024)
-    } else if (n > 1024 * 1024 * 1024) {
-      "%d TB".formatLocal(Locale.ENGLISH, n / 1024 / 1024 / 1024)
-    } else  {
-      ">1024 TB"
+  private val units = Array("KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB", "BB", "NB", "DB", "CB")
+  private val numberFormat = new DecimalFormat("0.00")
+  def formatTraffic(size: Long): String = {
+    var n: Double = size
+    var i = -1
+    while (n >= 1024) {
+      n /= 1024
+      i = i + 1
     }
+    if (i < 0) size + " " + ShadowsocksApplication.instance.getResources.getQuantityString(R.plurals.bytes, size.toInt)
+    else numberFormat.format(n) + ' ' + units(i)
   }
 
   def update() {
@@ -46,8 +46,8 @@ object TrafficMonitor {
       txRate = (now.tx - last.tx) / delta
       rxRate = (now.rx - last.rx) / delta
     }
-    txTotal += (now.tx - last.tx) / 1024
-    rxTotal += (now.rx - last.rx) / 1024
+    txTotal += now.tx - last.tx
+    rxTotal += now.rx - last.rx
     last = now
   }