diff --git a/src/main/res/layout/layout_main.xml b/src/main/res/layout/layout_main.xml
index de952fa4..20b37318 100644
--- a/src/main/res/layout/layout_main.xml
+++ b/src/main/res/layout/layout_main.xml
@@ -1,18 +1,15 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
-                                                 xmlns:app="http://schemas.android.com/apk/res-auto"
-                                                 android:layout_width="match_parent"
-                                                 android:layout_height="match_parent"
-                                                 android:clipChildren="false">
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+                xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools"
+                android:layout_width="match_parent" android:layout_height="match_parent"
+                tools:ignore="UnknownIdInLayout" android:clipChildren="false">
     <FrameLayout android:id="@+id/content"
                  android:layout_width="match_parent"
                  android:layout_height="match_parent"
-                 app:layout_anchor="@+id/stat"
-                 app:layout_behavior="com.github.shadowsocks.widget.BottomAwareBehavior"/>
+                 android:layout_above="@+id/stat"/>
     <LinearLayout android:id="@+id/stat"
                   android:layout_width="match_parent"
                   android:layout_height="wrap_content"
-                  android:layout_gravity="bottom"
                   android:elevation="4dp"
                   android:paddingStart="16dip"
                   android:paddingEnd="16dip"
@@ -22,7 +19,7 @@
                   android:background="@drawable/background_stat"
                   android:orientation="vertical"
                   android:nextFocusRight="@+id/fab"
-                  app:layout_behavior="com.github.shadowsocks.widget.BottomBehavior">
+                  android:layout_alignParentBottom="true">
         <TextView android:id="@+id/status"
                   android:textSize="16sp"
                   android:textColor="?android:attr/textColorPrimary"
@@ -74,15 +71,14 @@
                                                    android:layout_width="wrap_content"
                                                    android:layout_height="wrap_content"
                                                    android:elevation="6dp"
-                                                   app:layout_anchorGravity="end"
+                                                   android:layout_alignTop="@+id/stat"
+                                                   android:layout_alignParentEnd="true"
                                                    android:layout_marginEnd="16dp"
-                                                   android:layout_marginBottom="@dimen/fab_margin_bottom"
-                                                   app:layout_behavior="com.github.shadowsocks.widget.BottomBehavior"
-                                                   app:layout_anchor="@+id/stat">
+                                                   android:layout_marginTop="@dimen/fab_margin_top">
         <android.support.design.widget.FloatingActionButton android:id="@+id/fab" android:layout_width="wrap_content"
                                                             android:layout_height="wrap_content"
                                                             app:backgroundTint="@color/material_primary_500"
                                                             app:srcCompat="@drawable/ic_start_idle"
                                                             app:pressedTranslationZ="6dp" app:borderWidth="0dp" />
     </com.github.jorgecastilloprz.FABProgressCircle>
-</android.support.design.widget.CoordinatorLayout>
+</RelativeLayout>
diff --git a/src/main/res/values-v21/dimen.xml b/src/main/res/values-v21/dimen.xml
index 4c95daeb..605379c3 100644
--- a/src/main/res/values-v21/dimen.xml
+++ b/src/main/res/values-v21/dimen.xml
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <dimen name="fab_margin_bottom">-28dp</dimen>
+    <dimen name="fab_margin_top">-28dp</dimen>
 </resources>
diff --git a/src/main/res/values/dimen.xml b/src/main/res/values/dimen.xml
index f8e782e7..c11d2a7a 100644
--- a/src/main/res/values/dimen.xml
+++ b/src/main/res/values/dimen.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
     <!-- TODO: Remove when this issue is fixed: https://github.com/JorgeCastilloPrz/FABProgressCircle/issues/19 -->
-    <dimen name="fab_margin_bottom">-44dp</dimen>
+    <dimen name="fab_margin_top">-44dp</dimen>
 </resources>
diff --git a/src/main/scala/com/github/shadowsocks/GlobalConfigFragment.scala b/src/main/scala/com/github/shadowsocks/GlobalConfigFragment.scala
index f0832964..0a85cf2f 100644
--- a/src/main/scala/com/github/shadowsocks/GlobalConfigFragment.scala
+++ b/src/main/scala/com/github/shadowsocks/GlobalConfigFragment.scala
@@ -46,7 +46,7 @@ class GlobalConfigFragment extends PreferenceFragment {
       val value = v.asInstanceOf[Boolean]
       val result = TcpFastOpen.enabled(value)
       if (result != null && result != "Success.")
-        Snackbar.make(getActivity.findViewById(R.id.content), result, Snackbar.LENGTH_LONG).show()
+        Snackbar.make(getActivity.findViewById(android.R.id.content), result, Snackbar.LENGTH_LONG).show()
       value == TcpFastOpen.sendEnabled
     })
     if (!TcpFastOpen.supported) {
diff --git a/src/main/scala/com/github/shadowsocks/MainActivity.scala b/src/main/scala/com/github/shadowsocks/MainActivity.scala
index 44dbc46b..8b3a64c3 100644
--- a/src/main/scala/com/github/shadowsocks/MainActivity.scala
+++ b/src/main/scala/com/github/shadowsocks/MainActivity.scala
@@ -105,7 +105,7 @@ class MainActivity extends Activity with ServiceBoundContext with Drawer.OnDrawe
             fab.setEnabled(true)
             changeSwitch(checked = false)
             if (m != null) {
-              val snackbar = Snackbar.make(findViewById(R.id.content),
+              val snackbar = Snackbar.make(findViewById(android.R.id.content),
                 getString(R.string.vpn_error).formatLocal(Locale.ENGLISH, m), Snackbar.LENGTH_LONG)
               if (m == getString(R.string.nat_no_root)) addDisableNatToSnackbar(snackbar)
               snackbar.show()
@@ -276,7 +276,7 @@ class MainActivity extends Activity with ServiceBoundContext with Drawer.OnDrawe
             synchronized(if (serviceStarted && testCount == id && app.isVpnEnabled) handler.post(() =>
               if (success) statusText.setText(result) else {
                 statusText.setText(R.string.connection_test_fail)
-                Snackbar.make(findViewById(R.id.content), result, Snackbar.LENGTH_LONG).show()
+                Snackbar.make(findViewById(android.R.id.content), result, Snackbar.LENGTH_LONG).show()
               }))
           }
         }
diff --git a/src/main/scala/com/github/shadowsocks/widget/BottomAwareBehavior.scala b/src/main/scala/com/github/shadowsocks/widget/BottomAwareBehavior.scala
deleted file mode 100644
index 309ab2e6..00000000
--- a/src/main/scala/com/github/shadowsocks/widget/BottomAwareBehavior.scala
+++ /dev/null
@@ -1,43 +0,0 @@
-/*******************************************************************************/
-/*                                                                             */
-/*  Copyright (C) 2016 by Max Lv <max.c.lv@gmail.com>                          */
-/*  Copyright (C) 2016 by Mygod Studio <contact-shadowsocks-android@mygod.be>  */
-/*                                                                             */
-/*  This program is free software: you can redistribute it and/or modify       */
-/*  it under the terms of the GNU General Public License as published by       */
-/*  the Free Software Foundation, either version 3 of the License, or          */
-/*  (at your option) any later version.                                        */
-/*                                                                             */
-/*  This program is distributed in the hope that it will be useful,            */
-/*  but WITHOUT ANY WARRANTY; without even the implied warranty of             */
-/*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              */
-/*  GNU General Public License for more details.                               */
-/*                                                                             */
-/*  You should have received a copy of the GNU General Public License          */
-/*  along with this program. If not, see <http://www.gnu.org/licenses/>.       */
-/*                                                                             */
-/*******************************************************************************/
-
-package com.github.shadowsocks.widget
-
-import android.content.Context
-import android.support.design.widget.CoordinatorLayout
-import android.util.AttributeSet
-import android.view.View
-
-/**
-  * Behavior for content area that's aware of bottom bars.
-  *
-  * @author Mygod
-  */
-class BottomAwareBehavior(context: Context, attrs: AttributeSet)
-  extends CoordinatorLayout.Behavior[View](context, attrs) {
-  override def onDependentViewChanged(parent: CoordinatorLayout, child: View, dependency: View): Boolean = {
-    val params = child.getLayoutParams.asInstanceOf[CoordinatorLayout.LayoutParams]
-    val margin = parent.getHeight - dependency.getTop - dependency.getTranslationY.toInt
-    if (params.bottomMargin != margin) {
-      params.bottomMargin = margin
-      true
-    } else false
-  }
-}
diff --git a/src/main/scala/com/github/shadowsocks/widget/BottomBehavior.scala b/src/main/scala/com/github/shadowsocks/widget/BottomBehavior.scala
deleted file mode 100644
index ba37c41a..00000000
--- a/src/main/scala/com/github/shadowsocks/widget/BottomBehavior.scala
+++ /dev/null
@@ -1,98 +0,0 @@
-/*******************************************************************************/
-/*                                                                             */
-/*  Copyright (C) 2016 by Max Lv <max.c.lv@gmail.com>                          */
-/*  Copyright (C) 2016 by Mygod Studio <contact-shadowsocks-android@mygod.be>  */
-/*                                                                             */
-/*  This program is free software: you can redistribute it and/or modify       */
-/*  it under the terms of the GNU General Public License as published by       */
-/*  the Free Software Foundation, either version 3 of the License, or          */
-/*  (at your option) any later version.                                        */
-/*                                                                             */
-/*  This program is distributed in the hope that it will be useful,            */
-/*  but WITHOUT ANY WARRANTY; without even the implied warranty of             */
-/*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              */
-/*  GNU General Public License for more details.                               */
-/*                                                                             */
-/*  You should have received a copy of the GNU General Public License          */
-/*  along with this program. If not, see <http://www.gnu.org/licenses/>.       */
-/*                                                                             */
-/*******************************************************************************/
-
-package com.github.shadowsocks.widget
-
-import android.animation.ValueAnimator
-import android.content.Context
-import android.support.design.widget.CoordinatorLayout
-import android.support.design.widget.Snackbar.SnackbarLayout
-import android.support.v4.view.animation.FastOutSlowInInterpolator
-import android.util.AttributeSet
-import android.view.View
-
-import scala.collection.JavaConverters._
-
-/**
-  * A SnackbarLayout-aware behavior.
-  *
-  * TODO: What happened to the animations?
-  *
-  * @author Mygod
-  */
-class BottomBehavior(context: Context, attrs: AttributeSet) extends CoordinatorLayout.Behavior[View](context, attrs) {
-  private var translationYAnimator: ValueAnimator = _
-  private var translationY: Float = _
-
-  override def layoutDependsOn(parent: CoordinatorLayout, child: View, dependency: View): Boolean = dependency match {
-    case _: SnackbarLayout => true
-    case _ => super.layoutDependsOn(parent, child, dependency)
-  }
-
-  override def onDependentViewChanged(parent: CoordinatorLayout, child: View, dependency: View): Boolean = {
-    dependency match {
-      case _: SnackbarLayout =>
-        var targetTransY = parent.getDependencies(child).asScala
-          .filter(view => view.isInstanceOf[SnackbarLayout] && parent.doViewsOverlap(child, view))
-          .map(view => view.getTranslationY - view.getHeight).reduceOption(_ min _).getOrElse(0F)
-        if (targetTransY > 0) targetTransY = 0
-        if (translationY != targetTransY) {
-          val currentTransY = child.getTranslationY
-          if (translationYAnimator != null && translationYAnimator.isRunning) translationYAnimator.cancel()
-          if (child.isShown && Math.abs(currentTransY - targetTransY) > child.getHeight * 0.667F) {
-            if (translationYAnimator == null) {
-              translationYAnimator = new ValueAnimator
-              translationYAnimator.setInterpolator(new FastOutSlowInInterpolator())
-              translationYAnimator.addUpdateListener(animation =>
-                child.setTranslationY(animation.getAnimatedValue.asInstanceOf[Float]))
-            }
-            translationYAnimator.setFloatValues(currentTransY, targetTransY)
-            translationYAnimator.start()
-          } else child.setTranslationY(targetTransY)
-          translationY = targetTransY
-        }
-        true
-      case _ => super.onDependentViewChanged(parent, child, dependency)
-    }
-  }
-
-  override def onDependentViewRemoved(parent: CoordinatorLayout, child: View, dependency: View): Unit = {
-    dependency match {
-      case _: SnackbarLayout =>
-        if (translationY != 0) {
-          val currentTransY = child.getTranslationY
-          if (translationYAnimator != null && translationYAnimator.isRunning) translationYAnimator.cancel()
-          if (child.isShown && Math.abs(currentTransY) > child.getHeight * 0.667F) {
-            if (translationYAnimator == null) {
-              translationYAnimator = new ValueAnimator
-              translationYAnimator.setInterpolator(new FastOutSlowInInterpolator())
-              translationYAnimator.addUpdateListener(animation =>
-                child.setTranslationY(animation.getAnimatedValue.asInstanceOf[Float]))
-            }
-            translationYAnimator.setFloatValues(currentTransY, 0)
-            translationYAnimator.start()
-          } else child.setTranslationY(0)
-          translationY = 0
-        }
-        parent.dispatchDependentViewsChanged(child)
-    }
-    super.onDependentViewRemoved(parent, child, dependency)
-  }
-}