diff --git a/src/main/scala/com/github/shadowsocks/Shadowsocks.scala b/src/main/scala/com/github/shadowsocks/Shadowsocks.scala
index 5bbed62d..0b921540 100644
--- a/src/main/scala/com/github/shadowsocks/Shadowsocks.scala
+++ b/src/main/scala/com/github/shadowsocks/Shadowsocks.scala
@@ -42,9 +42,9 @@ import android.content._
 import android.content.res.AssetManager
 import android.graphics.Typeface
 import android.os._
-import android.preference.{CheckBoxPreference, Preference, PreferenceManager}
+import android.preference.{Preference, PreferenceManager}
 import android.util.Log
-import android.view.{ViewGroup, ViewParent, KeyEvent}
+import android.view.{ViewParent, KeyEvent}
 import android.widget.{LinearLayout, CompoundButton, RelativeLayout, TextView}
 import com.actionbarsherlock.view.Menu
 import com.actionbarsherlock.view.MenuItem
diff --git a/src/main/scala/com/github/shadowsocks/Utils.scala b/src/main/scala/com/github/shadowsocks/Utils.scala
index 433e238b..b069b888 100644
--- a/src/main/scala/com/github/shadowsocks/Utils.scala
+++ b/src/main/scala/com/github/shadowsocks/Utils.scala
@@ -41,7 +41,6 @@ import android.content.{Intent, SharedPreferences, Context}
 import android.content.pm.ApplicationInfo
 import android.content.pm.PackageManager
 import android.graphics.drawable.{BitmapDrawable, Drawable}
-import android.os.Environment
 import android.util.Log
 import java.io._
 import java.net.{UnknownHostException, InetAddress, NetworkInterface}
@@ -264,8 +263,9 @@ object Utils {
     val resolver = new SimpleResolver("8.8.8.8")
     resolver.setTimeout(5)
     lookup.setResolver(resolver)
-    val records = lookup.run()
-    if (records == null) return None
+    val result = lookup.run()
+    if (result == null) return None
+    val records = scala.util.Random.shuffle(result.toList)
     for (r <- records) {
       addrType match {
         case Type.A =>
@@ -426,8 +426,10 @@ object Utils {
   }
 
   def drawableToBitmap(drawable: Drawable): Bitmap = {
-    if (drawable.isInstanceOf[BitmapDrawable]) {
-      return drawable.asInstanceOf[BitmapDrawable].getBitmap
+    drawable match {
+      case d: BitmapDrawable =>
+        return d.getBitmap
+      case _ =>
     }
 
     val width = if (drawable.getIntrinsicWidth > 0) drawable.getIntrinsicWidth else 1