diff --git a/src/main/res/values/colors.xml b/src/main/res/values/colors.xml
index 311f4003..333f4545 100644
--- a/src/main/res/values/colors.xml
+++ b/src/main/res/values/colors.xml
@@ -2,7 +2,7 @@
 
 <resources>
 
-  <color name="material_green_700">#388E3C</color>
+  <color name="material_green_a700">#64DD17</color>
   <color name="material_blue_grey_300">#90A4AE</color>
   <color name="material_blue_grey_500">#607D8B</color>
   <color name="material_blue_grey_700">#455A64</color>
diff --git a/src/main/scala/com/github/shadowsocks/AppManager.scala b/src/main/scala/com/github/shadowsocks/AppManager.scala
index 05697a64..2e977e00 100644
--- a/src/main/scala/com/github/shadowsocks/AppManager.scala
+++ b/src/main/scala/com/github/shadowsocks/AppManager.scala
@@ -54,6 +54,7 @@ import android.view._
 import android.widget.AbsListView.OnScrollListener
 import android.widget.CompoundButton.OnCheckedChangeListener
 import android.widget._
+import android.Manifest.permission
 import com.github.shadowsocks.utils.{Key, Utils}
 
 import scala.collection.JavaConversions._
@@ -66,8 +67,10 @@ object AppManager {
 
   var cachedApps: Array[ProxiedApp] = _
   private def getApps(pm: PackageManager) = {
-    if (cachedApps == null) cachedApps = pm.getInstalledApplications(0)
-      .map(a => new ProxiedApp(pm.getApplicationLabel(a).toString, a.packageName, a.loadIcon(pm))).toArray
+    if (cachedApps == null) cachedApps = pm.getInstalledPackages(PackageManager.GET_PERMISSIONS)
+      .filter(p => p.requestedPermissions != null && p.requestedPermissions.contains(permission.INTERNET))
+      .map(p => new ProxiedApp(pm.getApplicationLabel(p.applicationInfo).toString, p.packageName,
+        p.applicationInfo.loadIcon(pm))).toArray
     cachedApps
   }
 }
diff --git a/src/main/scala/com/github/shadowsocks/AppManagerReceiver.scala b/src/main/scala/com/github/shadowsocks/AppManagerReceiver.scala
index f754f11a..f3170f21 100644
--- a/src/main/scala/com/github/shadowsocks/AppManagerReceiver.scala
+++ b/src/main/scala/com/github/shadowsocks/AppManagerReceiver.scala
@@ -7,5 +7,5 @@ import android.content.{Intent, Context, BroadcastReceiver}
   */
 class AppManagerReceiver extends BroadcastReceiver {
   override def onReceive(context: Context, intent: Intent) = if (intent.getAction != Intent.ACTION_PACKAGE_REMOVED ||
-    !intent.getBooleanExtra(Intent.EXTRA_REPLACING, false)) AppManager.cachedApps = null
+    !intent.getBooleanExtra(Intent.EXTRA_REPLACING, false)) AppManager.synchronized(AppManager.cachedApps = null)
 }
diff --git a/src/main/scala/com/github/shadowsocks/Shadowsocks.scala b/src/main/scala/com/github/shadowsocks/Shadowsocks.scala
index a301deed..3e3d0a60 100644
--- a/src/main/scala/com/github/shadowsocks/Shadowsocks.scala
+++ b/src/main/scala/com/github/shadowsocks/Shadowsocks.scala
@@ -246,7 +246,7 @@ class Shadowsocks
     getFragmentManager.findFragmentById(android.R.id.content).asInstanceOf[ShadowsocksSettings]
   private var adView: AdView = _
   private lazy val greyTint = ContextCompat.getColorStateList(this, R.color.material_blue_grey_700)
-  private lazy val greenTint = ContextCompat.getColorStateList(this, R.color.material_green_700)
+  private lazy val greenTint = ContextCompat.getColorStateList(this, R.color.material_green_a700)
 
   var handler = new Handler()
 
@@ -450,26 +450,28 @@ class Shadowsocks
       bgService.getState match {
         case State.CONNECTING =>
           fab.setBackgroundTintList(greyTint)
-          changeSwitch(checked = true)
+          serviceStarted = false
+          fab.setImageResource(R.drawable.ic_cloud_queue)
           setPreferenceEnabled(false)
           fabProgressCircle.show()
         case State.CONNECTED =>
           fab.setBackgroundTintList(greenTint)
-          changeSwitch(checked = true)
+          serviceStarted = true
+          fab.setImageResource(R.drawable.ic_cloud)
           setPreferenceEnabled(false)
-          fabProgressCircle.show()
-          handler.postDelayed(() => fabProgressCircle.hide(), 1000)
+          fabProgressCircle.postDelayed(fabProgressCircle.hide, 100)
         case State.STOPPING =>
           fab.setBackgroundTintList(greyTint)
-          changeSwitch(checked = false)
+          serviceStarted = false
+          fab.setImageResource(R.drawable.ic_cloud_queue)
           setPreferenceEnabled(false)
           fabProgressCircle.show()
         case _ =>
           fab.setBackgroundTintList(greyTint)
-          changeSwitch(checked = false)
+          serviceStarted = false
+          fab.setImageResource(R.drawable.ic_cloud_off)
           setPreferenceEnabled(true)
-          fabProgressCircle.show()
-          handler.postDelayed(() => fabProgressCircle.hide(), 1000)
+          fabProgressCircle.postDelayed(fabProgressCircle.hide, 100)
       }
       state = bgService.getState
     }