diff --git a/mobile/src/main/AndroidManifest.xml b/mobile/src/main/AndroidManifest.xml
index 8a5639cc..23bf4e9b 100644
--- a/mobile/src/main/AndroidManifest.xml
+++ b/mobile/src/main/AndroidManifest.xml
@@ -71,7 +71,7 @@
 
         <activity
             android:name=".VpnRequestActivity"
-            android:theme="@android:style/Theme.Translucent.NoTitleBar"
+            android:theme="@style/Theme.Translucent"
             android:excludeFromRecents="true"
             android:taskAffinity=""
             android:launchMode="singleTask"/>
diff --git a/mobile/src/main/java/com/github/shadowsocks/VpnRequestActivity.kt b/mobile/src/main/java/com/github/shadowsocks/VpnRequestActivity.kt
index 03cf7642..2ce7837c 100644
--- a/mobile/src/main/java/com/github/shadowsocks/VpnRequestActivity.kt
+++ b/mobile/src/main/java/com/github/shadowsocks/VpnRequestActivity.kt
@@ -20,7 +20,6 @@
 
 package com.github.shadowsocks
 
-import android.app.Activity
 import android.app.KeyguardManager
 import android.content.BroadcastReceiver
 import android.content.Context
@@ -28,13 +27,14 @@ import android.content.Intent
 import android.content.IntentFilter
 import android.net.VpnService
 import android.os.Bundle
+import android.support.v7.app.AppCompatActivity
 import android.util.Log
 import com.github.shadowsocks.App.Companion.app
 import com.github.shadowsocks.aidl.IShadowsocksService
 import com.github.shadowsocks.bg.BaseService
 import com.github.shadowsocks.utils.broadcastReceiver
 
-class VpnRequestActivity : Activity(), ShadowsocksConnection.Interface {
+class VpnRequestActivity : AppCompatActivity(), ShadowsocksConnection.Interface {
     companion object {
         private const val TAG = "VpnRequestActivity"
         private const val REQUEST_CONNECT = 1
diff --git a/mobile/src/main/java/com/github/shadowsocks/bg/LocalSocketListener.kt b/mobile/src/main/java/com/github/shadowsocks/bg/LocalSocketListener.kt
index d10fe208..96512c9e 100644
--- a/mobile/src/main/java/com/github/shadowsocks/bg/LocalSocketListener.kt
+++ b/mobile/src/main/java/com/github/shadowsocks/bg/LocalSocketListener.kt
@@ -41,7 +41,7 @@ abstract class LocalSocketListener(protected val tag: String) : Thread() {
      * Inherited class do not need to close input/output streams as they will be closed automatically.
      */
     protected abstract fun accept(socket: LocalSocket)
-    override final fun run() {
+    final override fun run() {
         socketFile.delete() // It's a must-have to close and reuse previous local socket.
         LocalSocket().use { localSocket ->
             val serverSocket = try {
diff --git a/mobile/src/main/res/values/styles.xml b/mobile/src/main/res/values/styles.xml
index 027dd5af..fecb5e51 100644
--- a/mobile/src/main/res/values/styles.xml
+++ b/mobile/src/main/res/values/styles.xml
@@ -1,5 +1,15 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
+    <style name="Theme.Translucent" parent="Theme.AppCompat.Dialog">
+        <item name="android:windowBackground">@android:color/transparent</item>
+        <item name="android:windowFrame">@null</item>
+        <item name="android:windowContentOverlay">@null</item>
+        <item name="android:windowAnimationStyle">@null</item>
+        <item name="android:backgroundDimEnabled">false</item>
+        <item name="android:windowIsTranslucent">true</item>
+        <item name="android:windowNoTitle">true</item>
+        <item name="android:windowCloseOnTouchOutside">false</item>
+    </style>
     <style name="StyledScrollerTextAppearance" parent="@android:style/TextAppearance">
         <item name="android:textSize">24sp</item>
         <item name="android:textStyle">bold</item>