Fix #496

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

@@ -44,6 +44,7 @@ import java.lang.Process
 import java.net.{Inet6Address, InetAddress}
 import java.util.Locale
 
+import android.app.Service
 import android.content._
 import android.content.pm.{PackageInfo, PackageManager}
 import android.net.{ConnectivityManager, Network}
@@ -331,6 +332,8 @@ class ShadowsocksNatService extends BaseService {
     ConfigUtils.refresh(this)
   }
 
+  override def onStartCommand(intent: Intent, flags: Int, startId: Int): Int = Service.START_STICKY
+
   def killProcesses() {
     if (sslocalProcess != null) {
       sslocalProcess.destroy()