diff --git a/mobile/src/main/java/com/github/shadowsocks/MainActivity.kt b/mobile/src/main/java/com/github/shadowsocks/MainActivity.kt
index 4fcb9fac..628a48a4 100644
--- a/mobile/src/main/java/com/github/shadowsocks/MainActivity.kt
+++ b/mobile/src/main/java/com/github/shadowsocks/MainActivity.kt
@@ -38,11 +38,11 @@ import android.support.v7.app.AlertDialog
 import android.support.v7.app.AppCompatActivity
 import android.support.v7.content.res.AppCompatResources
 import android.support.v7.preference.PreferenceDataStore
+import android.support.v7.widget.TooltipCompat
 import android.text.TextUtils
 import android.util.Log
 import android.view.View
 import android.widget.TextView
-import android.widget.Toast
 import com.github.jorgecastilloprz.FABProgressCircle
 import com.github.shadowsocks.App.Companion.app
 import com.github.shadowsocks.acl.Acl
@@ -57,7 +57,6 @@ import com.github.shadowsocks.database.ProfileManager
 import com.github.shadowsocks.preference.DataStore
 import com.github.shadowsocks.preference.OnPreferenceDataStoreChangeListener
 import com.github.shadowsocks.utils.Key
-import com.github.shadowsocks.utils.position
 import com.github.shadowsocks.utils.responseLength
 import com.github.shadowsocks.utils.thread
 import com.mikepenz.crossfader.Crossfader
@@ -165,8 +164,12 @@ class MainActivity : AppCompatActivity(), ShadowsocksConnection.Interface, Drawe
             }
         }
         this.state = state
-        if (state == BaseService.CONNECTED) fab.backgroundTintList = greenTint else {
+        if (state == BaseService.CONNECTED) {
+            fab.backgroundTintList = greenTint
+            TooltipCompat.setTooltipText(fab, getString(R.string.stop))
+        } else {
             fab.backgroundTintList = greyTint
+            TooltipCompat.setTooltipText(fab, getString(R.string.connect))
             updateTraffic(-1, 0, 0, 0, 0)
             testCount += 1  // suppress previous test messages
         }
@@ -329,13 +332,6 @@ class MainActivity : AppCompatActivity(), ShadowsocksConnection.Interface, Drawe
                 } else app.startService()
             }
         }
-        fab.setOnLongClickListener {
-            Toast.makeText(this, if (state == BaseService.CONNECTED) R.string.stop else R.string.connect,
-                    Toast.LENGTH_SHORT)
-                    .position(fab, window, 0, resources.getDimensionPixelOffset(R.dimen.margin_small))
-                    .show()
-            true
-        }
 
         changeState(BaseService.IDLE)   // reset everything to init state
         app.handler.post { connection.connect() }
diff --git a/mobile/src/main/java/com/github/shadowsocks/ProfilesFragment.kt b/mobile/src/main/java/com/github/shadowsocks/ProfilesFragment.kt
index fa68e458..aeb3a04c 100644
--- a/mobile/src/main/java/com/github/shadowsocks/ProfilesFragment.kt
+++ b/mobile/src/main/java/com/github/shadowsocks/ProfilesFragment.kt
@@ -46,7 +46,6 @@ import com.github.shadowsocks.database.ProfileManager
 import com.github.shadowsocks.plugin.PluginConfiguration
 import com.github.shadowsocks.preference.DataStore
 import com.github.shadowsocks.utils.Action
-import com.github.shadowsocks.utils.position
 import com.github.shadowsocks.widget.UndoSnackbarManager
 import com.google.android.gms.ads.AdRequest
 import com.google.android.gms.ads.AdSize
@@ -112,7 +111,7 @@ class ProfilesFragment : ToolbarFragment(), Toolbar.OnMenuItemClickListener {
     }
 
     inner class ProfileViewHolder(view: View) : RecyclerView.ViewHolder(view),
-            View.OnClickListener, View.OnLongClickListener, PopupMenu.OnMenuItemClickListener {
+            View.OnClickListener, PopupMenu.OnMenuItemClickListener {
         internal lateinit var item: Profile
 
         private val text1 = itemView.findViewById<TextView>(android.R.id.text1)
@@ -123,7 +122,7 @@ class ProfilesFragment : ToolbarFragment(), Toolbar.OnMenuItemClickListener {
 
         init {
             edit.setOnClickListener { startConfig(item.id) }
-            edit.setOnLongClickListener(this)
+            TooltipCompat.setTooltipText(edit, edit.contentDescription)
             itemView.setOnClickListener(this)
             val share = itemView.findViewById<View>(R.id.share)
             share.setOnClickListener {
@@ -132,7 +131,7 @@ class ProfilesFragment : ToolbarFragment(), Toolbar.OnMenuItemClickListener {
                 popup.setOnMenuItemClickListener(this)
                 popup.show()
             }
-            share.setOnLongClickListener(this)
+            TooltipCompat.setTooltipText(share, share.contentDescription)
         }
 
         fun bind(item: Profile) {
@@ -202,12 +201,6 @@ class ProfilesFragment : ToolbarFragment(), Toolbar.OnMenuItemClickListener {
             }
         }
 
-        override fun onLongClick(view: View): Boolean {
-            Toast.makeText(activity, view.contentDescription, Toast.LENGTH_SHORT).position(view, activity!!.window,
-                    0, resources.getDimensionPixelOffset(R.dimen.margin_small)).show()
-            return true
-        }
-
         override fun onMenuItemClick(item: MenuItem): Boolean = when (item.itemId) {
             R.id.action_qr_code_nfc -> {
                 fragmentManager!!.beginTransaction().add(QRCodeDialog(this.item.toString()), "")
diff --git a/mobile/src/main/java/com/github/shadowsocks/utils/Utils.kt b/mobile/src/main/java/com/github/shadowsocks/utils/Utils.kt
index a3410711..2becad25 100644
--- a/mobile/src/main/java/com/github/shadowsocks/utils/Utils.kt
+++ b/mobile/src/main/java/com/github/shadowsocks/utils/Utils.kt
@@ -3,17 +3,11 @@ package com.github.shadowsocks.utils
 import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.Intent
-import android.graphics.Rect
 import android.os.Build
 import android.support.v4.app.Fragment
 import android.support.v4.app.FragmentManager
 import android.support.v7.util.SortedList
-import android.util.DisplayMetrics
 import android.util.TypedValue
-import android.view.Gravity
-import android.view.View
-import android.view.Window
-import android.widget.Toast
 import com.github.shadowsocks.App.Companion.app
 import java.lang.reflect.InvocationTargetException
 import java.net.InetAddress
@@ -59,25 +53,6 @@ fun thread(start: Boolean = true, isDaemon: Boolean = false, contextClassLoader:
 val URLConnection.responseLength: Long
     get() = if (Build.VERSION.SDK_INT >= 24) contentLengthLong else contentLength.toLong()
 
-/**
- * Based on: http://stackoverflow.com/a/21026866/2245107
- */
-fun Toast.position(view: View, window: Window, offsetX: Int = 0, offsetY: Int = 0): Toast {
-    val rect = Rect()
-    window.decorView.getWindowVisibleDisplayFrame(rect)
-    val viewLocation = IntArray(2)
-    view.getLocationInWindow(viewLocation)
-    val metrics = DisplayMetrics()
-    window.windowManager.defaultDisplay.getMetrics(metrics)
-    val toastView = this.view
-    toastView.measure(View.MeasureSpec.makeMeasureSpec(metrics.widthPixels, View.MeasureSpec.UNSPECIFIED),
-            View.MeasureSpec.makeMeasureSpec(metrics.heightPixels, View.MeasureSpec.UNSPECIFIED))
-    setGravity(Gravity.START or Gravity.TOP,
-            viewLocation[0] - rect.left + (view.width - toastView.measuredWidth) / 2 + offsetX,
-            viewLocation[1] - rect.top + view.height + offsetY)
-    return this
-}
-
 fun Float.dp(): Float = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, this, app.resources.displayMetrics)
 
 /**