Copy feature settings from the current profile to the new profile.

And fix #432.

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

@@ -61,7 +61,7 @@ class ParserActivity extends Activity {
       .setTitle(R.string.add_profile_dialog)
       .setCancelable(false)
       .setPositiveButton(android.R.string.yes, ((dialog: DialogInterface, id: Int) => {
-        ShadowsocksApplication.profileManager.createOrUpdateProfile(profile.get)
+        ShadowsocksApplication.profileManager.createProfile(profile.get)
         dialog.dismiss()
       }): DialogInterface.OnClickListener)
       .setNegativeButton(android.R.string.no, ((dialog: DialogInterface, id: Int) => {

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

@@ -153,7 +153,7 @@ class ProfileManagerActivity extends AppCompatActivity with OnMenuItemClickListe
   override def onActivityResult(requestCode: Int, resultCode: Int, data: Intent) {
     val scanResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, data)
     if (scanResult != null) Parser.parse(scanResult.getContents) match {
-      case Some(profile) => ShadowsocksApplication.profileManager.createOrUpdateProfile(profile)
+      case Some(profile) => ShadowsocksApplication.profileManager.createProfile(profile)
       case _ => // ignore
     }
   }

src/main/scala/com/github/shadowsocks/database/ProfileManager.scala

@@ -49,15 +49,27 @@ class ProfileManager(settings: SharedPreferences, dbHelper: DBHelper) {
   var profileAddedListener: Profile => Any = _
   def setProfileAddedListener(listener: Profile => Any) = this.profileAddedListener = listener
 
-  def createOrUpdateProfile(profile: Profile): Boolean = {
+  def createProfile(p: Profile = null): Profile = {
     try {
+      val profile = if (p == null) new Profile else p
+      profile.id = 0
+      ShadowsocksApplication.currentProfile match {
+        case Some(oldProfile) =>
+          // Copy Feature Settings from old profile
+          profile.route = oldProfile.route
+          profile.ipv6 = oldProfile.ipv6
+          profile.proxyApps = oldProfile.proxyApps
+          profile.individual = oldProfile.individual
+          profile.udpdns = oldProfile.udpdns
+        case _ =>
+      }
       dbHelper.profileDao.createOrUpdate(profile)
       if (profileAddedListener != null) profileAddedListener(profile)
-      true
+      profile
     } catch {
       case ex: Exception =>
         Log.e(Shadowsocks.TAG, "addProfile", ex)
-        false
+        p
     }
   }
 
@@ -114,11 +126,7 @@ class ProfileManager(settings: SharedPreferences, dbHelper: DBHelper) {
 
   def load(id: Int): Profile =  {
 
-    val profile = getProfile(id) getOrElse {
-      val p = new Profile()
-      createOrUpdateProfile(p)
-      p
-    }
+    val profile = getProfile(id) getOrElse createProfile()
 
     val edit = settings.edit()
     edit.putBoolean(Key.isProxyApps, profile.proxyApps)
@@ -175,7 +183,7 @@ class ProfileManager(settings: SharedPreferences, dbHelper: DBHelper) {
       remotePort = 443
       password = "u1rRWTssNv0p"
     }
-    createOrUpdateProfile(profile)
+    createProfile(profile)
     profile
   }
 }

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

@@ -20,7 +20,7 @@ object TrafficMonitor {
   var txTotal: Long = 0
   var rxTotal: Long = 0
 
-  def getTraffic(): Traffic = {
+  def getTraffic: Traffic = {
     new Traffic(Math.max(TrafficStats.getTotalTxBytes - TrafficStats.getUidTxBytes(uid), 0),
       Math.max(TrafficStats.getTotalRxBytes - TrafficStats.getUidRxBytes(uid), 0), System.currentTimeMillis())
   }
@@ -84,4 +84,3 @@ object TrafficMonitor {
   }
 }
 
-class TrafficMonitor ()