diff --git a/build.sbt b/build.sbt
index cfa9233b..4851fe6f 100644
--- a/build.sbt
+++ b/build.sbt
@@ -17,9 +17,30 @@ lazy val commonSettings = Seq(
   typedResources := false
 )
 
-lazy val shadowsocks = project.in(file("."))
+val supportLibsVersion = "25.1.0"
+lazy val root = Project(id = "shadowsocks-android", base = file("."))
   .settings(commonSettings)
-  .aggregate(mobile)
+  .aggregate(pluginLib, mobile)
+
+install in Android := (install in (mobile, Android)).value
+run in Android := (run in (mobile, Android)).evaluated
+
+lazy val pluginLib = Project(id = "plugin-lib", base = file("plugin-lib"))
+  .settings(commonSettings)
+  .settings(
+    libraryDependencies ++=
+      "com.android.support" % "preference-v14" % supportLibsVersion ::
+      Nil
+  )
 
 lazy val mobile = project
   .settings(commonSettings)
+  .settings(
+    libraryDependencies ++=
+      "com.android.support" % "cardview-v7" % supportLibsVersion ::
+      "com.android.support" % "customtabs" % supportLibsVersion ::
+      "com.android.support" % "design" % supportLibsVersion ::
+      "com.android.support" % "gridlayout-v7" % supportLibsVersion ::
+      Nil
+  )
+  .dependsOn(pluginLib)
diff --git a/mobile/build.sbt b/mobile/build.sbt
index bebd4e1e..2816e688 100644
--- a/mobile/build.sbt
+++ b/mobile/build.sbt
@@ -6,6 +6,12 @@ version := "4.0.0"
 versionCode := Some(174)
 
 proguardOptions ++=
+  "-keep class android.support.v14.preference.SwitchPreference { <init>(...); }" ::
+  "-keep class android.support.v7.preference.DropDownPreference { <init>(...); }" ::
+  "-keep class android.support.v7.preference.PreferenceScreen { <init>(...); }" ::
+  "-keep class be.mygod.preference.EditTextPreference { <init>(...); }" ::
+  "-keep class be.mygod.preference.NumberPickerPreference { <init>(...); }" ::
+  "-keep class be.mygod.preference.PreferenceCategory { <init>(...); }" ::
   "-keep class com.github.shadowsocks.System { *; }" ::
   "-dontwarn com.google.android.gms.internal.**" ::
   "-dontwarn com.j256.ormlite.**" ::
@@ -15,15 +21,9 @@ proguardOptions ++=
 
 resConfigs := Seq("ja", "ru", "zh-rCN", "zh-rTW")
 
-val supportLibsVersion = "25.1.0"
 val playServicesVersion = "10.0.1"
 resolvers += Resolver.jcenterRepo
 libraryDependencies ++=
-  "com.android.support" % "cardview-v7" % supportLibsVersion ::
-  "com.android.support" % "customtabs" % supportLibsVersion ::
-  "com.android.support" % "design" % supportLibsVersion ::
-  "com.android.support" % "gridlayout-v7" % supportLibsVersion ::
-  "com.android.support" % "preference-v14" % supportLibsVersion ::
   "com.futuremind.recyclerfastscroll" % "fastscroll" % "0.2.5" ::
   "com.evernote" % "android-job" % "1.1.4" ::
   "com.github.jorgecastilloprz" % "fabprogresscircle" % "1.01" ::
diff --git a/mobile/src/main/AndroidManifest.xml b/mobile/src/main/AndroidManifest.xml
index 5594a06b..2c4f35dc 100644
--- a/mobile/src/main/AndroidManifest.xml
+++ b/mobile/src/main/AndroidManifest.xml
@@ -25,7 +25,6 @@
             android:roundIcon="@mipmap/ic_launcher"
             android:backupAgent=".ShadowsocksBackupAgent"
             android:label="@string/app_name"
-            android:theme="@style/Theme.Material"
             android:banner="@drawable/ic_start_connected">
 
         <meta-data android:name="com.google.android.gms.version"
diff --git a/mobile/src/main/res/values-v21/styles.xml b/mobile/src/main/res/values-v21/styles.xml
deleted file mode 100644
index 1050141b..00000000
--- a/mobile/src/main/res/values-v21/styles.xml
+++ /dev/null
@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <style name="Theme.Material" parent="Theme.MaterialBase"/>
-</resources>
diff --git a/mobile/src/main/res/values/attrs.xml b/mobile/src/main/res/values/attrs.xml
index 0671660e..755593c8 100644
--- a/mobile/src/main/res/values/attrs.xml
+++ b/mobile/src/main/res/values/attrs.xml
@@ -4,8 +4,4 @@
         <attr name="bounded_width" format="dimension" />
         <attr name="bounded_height" format="dimension" />
     </declare-styleable>
-    <declare-styleable name="NumberPickerPreference">
-        <attr name="max" format="integer" />
-        <attr name="min" format="integer" />
-    </declare-styleable>
 </resources>
diff --git a/mobile/src/main/res/values/styles.xml b/mobile/src/main/res/values/styles.xml
index 44d645f6..956d9f2d 100644
--- a/mobile/src/main/res/values/styles.xml
+++ b/mobile/src/main/res/values/styles.xml
@@ -1,58 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
-
 <resources>
-
-    <style name="Toolbar.Logo" parent="TextAppearance.Widget.AppCompat.Toolbar.Title">
-        <item name="android:textSize">24sp</item>
-    </style>
-
-    <style name="Theme.MaterialBase" parent="MaterialDrawerTheme.Light.DarkToolbar">
-        <!--suppress NewApi -->
-        <item name="android:navigationBarColor">@color/material_primary_700</item>
-        <item name="colorAccent">@color/material_accent_200</item>
-        <item name="colorButtonNormal">@color/material_accent_200</item>
-        <item name="colorPrimary">@color/material_primary_500</item>
-        <item name="colorPrimaryDark">@color/material_primary_700</item>
-        <item name="preferenceTheme">@style/Theme.Material.PreferenceThemeOverlay</item>
-
+    <style name="Theme.Shadowsocks.Material" parent="MaterialDrawerTheme.Light.DarkToolbar">
         <item name="material_drawer_selected_text">@color/material_accent_200</item>
     </style>
-
-    <style name="Theme.Material.Dialog" parent="Theme.AppCompat.Light.Dialog">
-        <item name="colorAccent">@color/material_primary_500</item>
-        <item name="colorButtonNormal">@color/material_accent_200</item>
-        <item name="colorPrimary">@color/material_primary_500</item>
-        <item name="colorPrimaryDark">@color/material_primary_700</item>
-        <item name="preferenceTheme">@style/Theme.Material.PreferenceThemeOverlay</item>
-        <item name="windowNoTitle">true</item>
-    </style>
-
-    <!-- Fix for wrong padding on v17-v20 based on: https://github.com/Gericop/Android-Support-Preference-V7-Fix/blob/a6082cb/preference-v7/src/main/res/values-v17/styles.xml -->
-    <style name="Theme.Material" parent="Theme.MaterialBase">
-        <item name="android:listPreferredItemPaddingStart">16dp</item>
-        <item name="android:listPreferredItemPaddingEnd">16dp</item>
-    </style>
-    <!-- This is needed because the default PreferenceCategory appearance doesn't use bold text style -->
-    <style name="Preference_TextAppearanceMaterialBody2">
-        <item name="android:textSize">14sp</item>
-        <item name="android:fontFamily">sans-serif-medium</item>
-        <item name="android:textStyle">bold</item>
-        <item name="android:textColor">?android:attr/textColorPrimary</item>
-    </style>
-    <style name="Theme.Material.PreferenceThemeOverlay" parent="@style/PreferenceThemeOverlay.v14.Material">
-        <item name="preferenceFragmentListStyle">@style/Theme.Material.PreferenceFragmentList</item>
-    </style>
-    <style name="Theme.Material.PreferenceFragmentList" parent="@style/PreferenceFragmentList.Material">
-        <item name="android:fadeScrollbars">true</item>
-        <item name="android:scrollbars">vertical</item>
-    </style>
-    <style name="NumberPickerStyle">
-        <item name="android:textSize">14sp</item>
-    </style>
     <style name="StyledScrollerTextAppearance" parent="@android:style/TextAppearance">
         <item name="android:textSize">24sp</item>
         <item name="android:textStyle">bold</item>
         <item name="android:textColor">@android:color/white</item>
     </style>
-
 </resources>
diff --git a/mobile/src/main/scala/com/github/shadowsocks/database/DBHelper.scala b/mobile/src/main/scala/com/github/shadowsocks/database/DBHelper.scala
index ebbb3e2c..90e6d4e0 100644
--- a/mobile/src/main/scala/com/github/shadowsocks/database/DBHelper.scala
+++ b/mobile/src/main/scala/com/github/shadowsocks/database/DBHelper.scala
@@ -127,10 +127,10 @@ class DBHelper(val context: Context)
           profileDao.executeRawNoArgs("ALTER TABLE `profile` RENAME TO `tmp`;")
           TableUtils.createTable(connectionSource, classOf[Profile])
           profileDao.executeRawNoArgs(
-            "INSERT INTO `profile`(id, name, host, localPort, remotePort, password, method, route, proxyApps, bypass," +
-            " udpdns, auth, ipv6, individual, tx, rx, date, userOrder, plugin) " +
+            "INSERT INTO `profile`(id, name, host, localPort, remotePort, password, method, route, remoteDns, proxyApps," +
+            " bypass, udpdns, auth, ipv6, individual, tx, rx, date, userOrder, plugin) " +
             "SELECT id, name, host, localPort, CASE WHEN kcp = 1 THEN kcpPort ELSE remotePort END, password, method, " +
-            "route, proxyApps, bypass, udpdns, auth, ipv6, individual, tx, rx, date, userOrder, " +
+            "route, remoteDns, proxyApps, bypass, udpdns, auth, ipv6, individual, tx, rx, date, userOrder, " +
             "CASE WHEN kcp = 1 THEN 'kcptun ' || kcpcli ELSE NULL END FROM `tmp`;")
           profileDao.executeRawNoArgs("DROP TABLE `tmp`;")
           profileDao.executeRawNoArgs("COMMIT;")
diff --git a/plugin-lib/build.sbt b/plugin-lib/build.sbt
new file mode 100644
index 00000000..d3e6c0d5
--- /dev/null
+++ b/plugin-lib/build.sbt
@@ -0,0 +1,5 @@
+enablePlugins(AndroidLib)
+android.useSupportVectors
+
+name := "plugin"
+version := "0.0.1-SNAPSHOT"
diff --git a/plugin-lib/src/main/AndroidManifest.xml b/plugin-lib/src/main/AndroidManifest.xml
new file mode 100644
index 00000000..a5e9871d
--- /dev/null
+++ b/plugin-lib/src/main/AndroidManifest.xml
@@ -0,0 +1,11 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="com.github.shadowsocks.plugin">
+    <uses-sdk
+            android:minSdkVersion="19"
+            android:targetSdkVersion="25"/>
+    <application
+            android:theme="@style/Theme.Shadowsocks">
+        <meta-data android:name="com.github.shadowsocks.plugin.version"
+                   android:value="0.0.1"/>
+    </application>
+</manifest>
diff --git a/plugin-lib/src/main/res/values-v21/styles.xml b/plugin-lib/src/main/res/values-v21/styles.xml
new file mode 100644
index 00000000..624881d2
--- /dev/null
+++ b/plugin-lib/src/main/res/values-v21/styles.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="Theme.Shadowsocks" parent="Theme.ShadowsocksBase"/>
+</resources>
diff --git a/plugin-lib/src/main/res/values/attrs.xml b/plugin-lib/src/main/res/values/attrs.xml
new file mode 100644
index 00000000..fc9b5af9
--- /dev/null
+++ b/plugin-lib/src/main/res/values/attrs.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <declare-styleable name="NumberPickerPreference">
+        <attr name="max" format="integer" />
+        <attr name="min" format="integer" />
+    </declare-styleable>
+</resources>
diff --git a/mobile/src/main/res/values/colors.xml b/plugin-lib/src/main/res/values/colors.xml
similarity index 100%
rename from mobile/src/main/res/values/colors.xml
rename to plugin-lib/src/main/res/values/colors.xml
diff --git a/plugin-lib/src/main/res/values/styles.xml b/plugin-lib/src/main/res/values/styles.xml
new file mode 100644
index 00000000..4db00a18
--- /dev/null
+++ b/plugin-lib/src/main/res/values/styles.xml
@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="Theme.Shadowsocks.Material" parent="Theme.AppCompat.Light.NoActionBar"/>
+    <style name="Theme.ShadowsocksBase" parent="Theme.Shadowsocks.Material">
+        <!--suppress NewApi -->
+        <item name="android:navigationBarColor">@color/material_primary_700</item>
+        <item name="colorAccent">@color/material_accent_200</item>
+        <item name="colorButtonNormal">@color/material_accent_200</item>
+        <item name="colorPrimary">@color/material_primary_500</item>
+        <item name="colorPrimaryDark">@color/material_primary_700</item>
+        <item name="preferenceTheme">@style/Theme.Shadowsocks.PreferenceThemeOverlay</item>
+    </style>
+
+    <style name="Theme.Shadowsocks.Dialog" parent="Theme.AppCompat.Light.Dialog">
+        <item name="colorAccent">@color/material_primary_500</item>
+        <item name="colorButtonNormal">@color/material_accent_200</item>
+        <item name="colorPrimary">@color/material_primary_500</item>
+        <item name="colorPrimaryDark">@color/material_primary_700</item>
+        <item name="preferenceTheme">@style/Theme.Shadowsocks.PreferenceThemeOverlay</item>
+        <item name="windowNoTitle">true</item>
+    </style>
+
+    <!-- Fix for wrong padding on v17-v20 based on: https://github.com/Gericop/Android-Support-Preference-V7-Fix/blob/a6082cb/preference-v7/src/main/res/values-v17/styles.xml -->
+    <style name="Theme.Shadowsocks" parent="Theme.ShadowsocksBase">
+        <item name="android:listPreferredItemPaddingStart">16dp</item>
+        <item name="android:listPreferredItemPaddingEnd">16dp</item>
+    </style>
+    <!-- This is needed because the default PreferenceCategory appearance doesn't use bold text style -->
+    <style name="Preference_TextAppearanceMaterialBody2">
+        <item name="android:textSize">14sp</item>
+        <item name="android:fontFamily">sans-serif-medium</item>
+        <item name="android:textStyle">bold</item>
+        <item name="android:textColor">?android:attr/textColorPrimary</item>
+    </style>
+    <style name="Theme.Shadowsocks.PreferenceThemeOverlay" parent="@style/PreferenceThemeOverlay.v14.Material">
+        <item name="preferenceFragmentListStyle">@style/Theme.Shadowsocks.PreferenceFragmentList</item>
+    </style>
+    <style name="Theme.Shadowsocks.PreferenceFragmentList" parent="@style/PreferenceFragmentList.Material">
+        <item name="android:fadeScrollbars">true</item>
+        <item name="android:scrollbars">vertical</item>
+    </style>
+    <style name="NumberPickerStyle">
+        <item name="android:textSize">14sp</item>
+    </style>
+</resources>
diff --git a/mobile/src/main/scala/be/mygod/preference/DialogPreferencePlus.scala b/plugin-lib/src/main/scala/be/mygod/preference/DialogPreferencePlus.scala
similarity index 100%
rename from mobile/src/main/scala/be/mygod/preference/DialogPreferencePlus.scala
rename to plugin-lib/src/main/scala/be/mygod/preference/DialogPreferencePlus.scala
diff --git a/mobile/src/main/scala/be/mygod/preference/EditTextPreference.scala b/plugin-lib/src/main/scala/be/mygod/preference/EditTextPreference.scala
similarity index 100%
rename from mobile/src/main/scala/be/mygod/preference/EditTextPreference.scala
rename to plugin-lib/src/main/scala/be/mygod/preference/EditTextPreference.scala
diff --git a/mobile/src/main/scala/be/mygod/preference/EditTextPreferenceDialogFragment.scala b/plugin-lib/src/main/scala/be/mygod/preference/EditTextPreferenceDialogFragment.scala
similarity index 100%
rename from mobile/src/main/scala/be/mygod/preference/EditTextPreferenceDialogFragment.scala
rename to plugin-lib/src/main/scala/be/mygod/preference/EditTextPreferenceDialogFragment.scala
diff --git a/mobile/src/main/scala/be/mygod/preference/NumberPickerPreference.scala b/plugin-lib/src/main/scala/be/mygod/preference/NumberPickerPreference.scala
similarity index 98%
rename from mobile/src/main/scala/be/mygod/preference/NumberPickerPreference.scala
rename to plugin-lib/src/main/scala/be/mygod/preference/NumberPickerPreference.scala
index b321db1d..9b303670 100644
--- a/mobile/src/main/scala/be/mygod/preference/NumberPickerPreference.scala
+++ b/plugin-lib/src/main/scala/be/mygod/preference/NumberPickerPreference.scala
@@ -26,7 +26,7 @@ import android.support.v7.preference.DialogPreference
 import android.util.AttributeSet
 import android.view.ContextThemeWrapper
 import android.widget.NumberPicker
-import com.github.shadowsocks.R
+import com.github.shadowsocks.plugin.R
 
 class NumberPickerPreference(private val context: Context, attrs: AttributeSet = null)
   extends DialogPreference(context, attrs) with DialogPreferencePlus with SummaryPreference {
diff --git a/mobile/src/main/scala/be/mygod/preference/NumberPickerPreferenceDialogFragment.scala b/plugin-lib/src/main/scala/be/mygod/preference/NumberPickerPreferenceDialogFragment.scala
similarity index 100%
rename from mobile/src/main/scala/be/mygod/preference/NumberPickerPreferenceDialogFragment.scala
rename to plugin-lib/src/main/scala/be/mygod/preference/NumberPickerPreferenceDialogFragment.scala
diff --git a/mobile/src/main/scala/be/mygod/preference/PreferenceCategory.scala b/plugin-lib/src/main/scala/be/mygod/preference/PreferenceCategory.scala
similarity index 100%
rename from mobile/src/main/scala/be/mygod/preference/PreferenceCategory.scala
rename to plugin-lib/src/main/scala/be/mygod/preference/PreferenceCategory.scala
diff --git a/mobile/src/main/scala/be/mygod/preference/PreferenceFragment.scala b/plugin-lib/src/main/scala/be/mygod/preference/PreferenceFragment.scala
similarity index 100%
rename from mobile/src/main/scala/be/mygod/preference/PreferenceFragment.scala
rename to plugin-lib/src/main/scala/be/mygod/preference/PreferenceFragment.scala
diff --git a/mobile/src/main/scala/be/mygod/preference/PreferenceGroupAdapter.scala b/plugin-lib/src/main/scala/be/mygod/preference/PreferenceGroupAdapter.scala
similarity index 99%
rename from mobile/src/main/scala/be/mygod/preference/PreferenceGroupAdapter.scala
rename to plugin-lib/src/main/scala/be/mygod/preference/PreferenceGroupAdapter.scala
index 41934e17..8819ca37 100644
--- a/mobile/src/main/scala/be/mygod/preference/PreferenceGroupAdapter.scala
+++ b/plugin-lib/src/main/scala/be/mygod/preference/PreferenceGroupAdapter.scala
@@ -28,7 +28,7 @@ import android.support.v4.content.ContextCompat
 import android.support.v4.view.ViewCompat
 import android.support.v7.preference.{PreferenceGroup, PreferenceViewHolder, PreferenceGroupAdapter => Old}
 import android.view.{LayoutInflater, View, ViewGroup}
-import com.github.shadowsocks.R
+import com.github.shadowsocks.plugin.R
 
 /**
   * Fix by: https://github.com/Gericop/Android-Support-Preference-V7-Fix/commit/7de016b007e28a264001a8bb353f110a7f64bb69
diff --git a/mobile/src/main/scala/be/mygod/preference/SummaryPreference.scala b/plugin-lib/src/main/scala/be/mygod/preference/SummaryPreference.scala
similarity index 100%
rename from mobile/src/main/scala/be/mygod/preference/SummaryPreference.scala
rename to plugin-lib/src/main/scala/be/mygod/preference/SummaryPreference.scala