diff --git a/app/src/main/java/com/bluecat/view404Demo/MainActivity.kt b/app/src/main/java/com/bluecat/view404Demo/MainActivity.kt
index 5460589..32ddbe1 100644
--- a/app/src/main/java/com/bluecat/view404Demo/MainActivity.kt
+++ b/app/src/main/java/com/bluecat/view404Demo/MainActivity.kt
@@ -33,16 +33,19 @@ class MainActivity : AppCompatActivity() {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
 
+
         button2.setOnClickListener {
             view404 = View404(this, R.layout.layout_404)
             Toast.makeText(this, "shown", Toast.LENGTH_SHORT).show()
 
             view404?.view404?.button?.setOnClickListener {
-                view404?.dismiss()
+                //view404?.dismiss()
+                view404?.dismiss(R.anim.abc_fade_out)
                 Toast.makeText(this, "dismissed", Toast.LENGTH_SHORT).show()
             }
 
-            parentLayout.show404(view404!!)
+            //parentLayout.show404(view404!!)
+            parentLayout.show404(view404!!, R.anim.abc_fade_in)
         }
     }
 }
diff --git a/view404/src/main/java/com/bluecat/view404/View404.kt b/view404/src/main/java/com/bluecat/view404/View404.kt
index 111d4d2..3931381 100644
--- a/view404/src/main/java/com/bluecat/view404/View404.kt
+++ b/view404/src/main/java/com/bluecat/view404/View404.kt
@@ -20,9 +20,10 @@ import android.content.Context
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.view.animation.AnimationUtils
 import androidx.core.view.ViewCompat
 
-class View404(context: Context, layout: Int) {
+class View404(private val context: Context, layout: Int) {
 
     /** NoneNull type */
     private var layoutInflater: LayoutInflater =
@@ -51,11 +52,12 @@ class View404(context: Context, layout: Int) {
         }
     }
 
-    /** shows the view404 on the parent view. */
-    fun show(parentView: ViewGroup?) {
+    /** shows the view404 on the parent view.
+        if you want to put another fadeIn animation, you can do that. */
+    fun show(parentView: ViewGroup?, fadeInAnimation:Int = R.anim.not_move_activity) {
         if (!isShowing && parentView != null) {
             this.parentView = parentView
-
+            view404.startAnimation(AnimationUtils.loadAnimation(context, fadeInAnimation))
             /** 'run' refer to the context object as a lambda receiver by keyword 'this',
             it returns the lambda result. */
             this.parentView?.run {
@@ -64,14 +66,17 @@ class View404(context: Context, layout: Int) {
                 requestLayout()
                 invalidate()
             }
+
             ViewCompat.setTranslationZ(view404, 99f)
             isShowing = true
         }
     }
 
-    /** dismiss the view404 on the parent view. */
-    fun dismiss() {
+    /** dismiss the view404 on the parent view.
+        if you want to put another fadeOut animation, you can do that. */
+    fun dismiss(fadeOutAnimation:Int = R.anim.not_move_activity) {
         if (isShowing) {
+            view404.startAnimation(AnimationUtils.loadAnimation(context, fadeOutAnimation))
             parentView?.removeView(view404)
             isShowing = false
         }
diff --git a/view404/src/main/java/com/bluecat/view404/View404Extensions.kt b/view404/src/main/java/com/bluecat/view404/View404Extensions.kt
index 0483d1d..649b433 100644
--- a/view404/src/main/java/com/bluecat/view404/View404Extensions.kt
+++ b/view404/src/main/java/com/bluecat/view404/View404Extensions.kt
@@ -18,6 +18,6 @@ package com.bluecat.view404
 
 import android.view.ViewGroup
 
-fun ViewGroup.show404(view404: View404) {
-    view404.show(this)
+fun ViewGroup.show404(view404: View404, fadeInAnimation:Int = R.anim.not_move_activity) {
+    view404.show(this, fadeInAnimation)
 }
diff --git a/view404/src/main/res/anim/abc_fade_in.xml b/view404/src/main/res/anim/abc_fade_in.xml
new file mode 100644
index 0000000..362fdb7
--- /dev/null
+++ b/view404/src/main/res/anim/abc_fade_in.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2013 The Android Open Source Project
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+          http://www.apache.org/licenses/LICENSE-2.0
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<alpha xmlns:android="http://schemas.android.com/apk/res/android"
+       android:interpolator="@android:anim/decelerate_interpolator"
+       android:fromAlpha="0.0" android:toAlpha="1.0"
+       android:duration="@android:integer/config_mediumAnimTime" />
\ No newline at end of file
diff --git a/view404/src/main/res/anim/abc_fade_out.xml b/view404/src/main/res/anim/abc_fade_out.xml
new file mode 100644
index 0000000..eb63b70
--- /dev/null
+++ b/view404/src/main/res/anim/abc_fade_out.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2013 The Android Open Source Project
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+          http://www.apache.org/licenses/LICENSE-2.0
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<alpha xmlns:android="http://schemas.android.com/apk/res/android"
+       android:interpolator="@android:anim/decelerate_interpolator"
+       android:fromAlpha="1.0" android:toAlpha="0.0"
+       android:duration="@android:integer/config_mediumAnimTime" />
\ No newline at end of file
diff --git a/view404/src/main/res/anim/not_move_activity.xml b/view404/src/main/res/anim/not_move_activity.xml
new file mode 100644
index 0000000..7ab9a6a
--- /dev/null
+++ b/view404/src/main/res/anim/not_move_activity.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+    <translate android:fromXDelta="0" android:toXDelta="0" android:duration="300"/>
+</set>