diff --git a/entry/src/main/java/com/jetradar/multibackstack/sample/slice/MainAbilitySlice.java b/entry/src/main/java/com/jetradar/multibackstack/sample/slice/MainAbilitySlice.java
index 5aeb42469b349ba5246dda1662de69c55d3eb57f..cebc06116f55e59b1941610e4180b653209fa80d 100644
--- a/entry/src/main/java/com/jetradar/multibackstack/sample/slice/MainAbilitySlice.java
+++ b/entry/src/main/java/com/jetradar/multibackstack/sample/slice/MainAbilitySlice.java
@@ -1,3 +1,17 @@
+/*
+ * Copyright (C) 2021 Huawei Device Co., Ltd.
+ * 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.
+ */
 package com.jetradar.multibackstack.sample.slice;
 
 import com.jetradar.multibackstack.BaseAbilitySlice;
@@ -22,6 +36,10 @@ import ohos.agp.window.service.WindowManager;
  * @since 2021-06-10
  */
 public class MainAbilitySlice extends BaseAbilitySlice implements Component.ClickedListener {
+    private static final int NUM_1 = -1;
+    private static final int NUM_2 = 2;
+    private static final int NUM_100 = 100;
+    private static final float NUM_1F = 1.1f;
     private SearchFraction searchFraction;
     private FavoritesFraction favoritesFraction;
     private ProFileFraction proFileFraction;
@@ -68,7 +86,7 @@ public class MainAbilitySlice extends BaseAbilitySlice implements Component.Clic
                 .hide(proFileFraction)
                 .show(searchFraction)
                 .submit();
-        addAction(searchFraction, -1);
+        addAction(searchFraction, NUM_1);
         search.setClickedListener(this::onClick);
         favorites.setClickedListener(this::onClick);
         profile.setClickedListener(this::onClick);
@@ -82,54 +100,15 @@ public class MainAbilitySlice extends BaseAbilitySlice implements Component.Clic
     public void onClick(Component component) {
         switch (component.getId()) {
             case ResourceTable.Id_search:
-                if (selectInt != 0) {
-                    initComponent();
-                    initTitle();
-                    setSearchAnimator(search, searchImg, ResourceTable.Media_serch_true, searchText);
-                    ((FractionAbility) getAbility()).getFractionManager()
-                            .startFractionScheduler()
-                            .hide(favoritesFraction)
-                            .hide(proFileFraction)
-                            .show(searchFraction)
-                            .submit();
-                    searchFraction.showAll();
-                    addAction(searchFraction, -1);
-                    selectInt = 0;
-
-                }
+                searchClick();
                 break;
             case ResourceTable.Id_favorites:
+                favoritesClick();
 
-                if (selectInt != 1) {
-                    initComponent();
-                    initTitle();
-                    setSearchAnimator(favorites, favoritesImg, ResourceTable.Media_heart_true, favoritesText);
-                    ((FractionAbility) getAbility()).getFractionManager()
-                            .startFractionScheduler()
-                            .hide(searchFraction)
-                            .hide(proFileFraction)
-                            .show(favoritesFraction)
-                            .submit();
-                    favoritesFraction.showAll();
-                    addAction(favoritesFraction, -1);
-                    selectInt = 1;
-                }
                 break;
             case ResourceTable.Id_profile:
-                proFileFraction.showAll();
-                if (selectInt != 2) {
-                    initComponent();
-                    initTitle();
-                    setSearchAnimator(profile, profileImg, ResourceTable.Media_mine_true, profileText);
-                    ((FractionAbility) getAbility()).getFractionManager()
-                            .startFractionScheduler()
-                            .hide(searchFraction)
-                            .hide(favoritesFraction)
-                            .show(proFileFraction)
-                            .submit();
-                    addAction(proFileFraction, -1);
-                    selectInt = 2;
-                }
+                profileClick();
+
                 break;
             case ResourceTable.Id_back:
                 onBackPressed();
@@ -141,6 +120,59 @@ public class MainAbilitySlice extends BaseAbilitySlice implements Component.Clic
 
     }
 
+    private void profileClick() {
+        proFileFraction.showAll();
+        if (selectInt != NUM_2) {
+            initComponent();
+            initTitle();
+            setSearchAnimator(profile, profileImg, ResourceTable.Media_mine_true, profileText);
+            ((FractionAbility) getAbility()).getFractionManager()
+                    .startFractionScheduler()
+                    .hide(searchFraction)
+                    .hide(favoritesFraction)
+                    .show(proFileFraction)
+                    .submit();
+            addAction(proFileFraction, NUM_1);
+            selectInt = NUM_2;
+        }
+    }
+
+    private void favoritesClick() {
+        if (selectInt != 1) {
+            initComponent();
+            initTitle();
+            setSearchAnimator(favorites, favoritesImg, ResourceTable.Media_heart_true, favoritesText);
+            ((FractionAbility) getAbility()).getFractionManager()
+                    .startFractionScheduler()
+                    .hide(searchFraction)
+                    .hide(proFileFraction)
+                    .show(favoritesFraction)
+                    .submit();
+            favoritesFraction.showAll();
+            addAction(favoritesFraction, NUM_1);
+            selectInt = 1;
+        }
+    }
+
+    private void searchClick() {
+        if (selectInt != 0) {
+            initComponent();
+            initTitle();
+            setSearchAnimator(search, searchImg, ResourceTable.Media_serch_true, searchText);
+            ((FractionAbility) getAbility()).getFractionManager()
+                    .startFractionScheduler()
+                    .hide(favoritesFraction)
+                    .hide(proFileFraction)
+                    .show(searchFraction)
+                    .submit();
+            searchFraction.showAll();
+            addAction(searchFraction, NUM_1);
+            selectInt = 0;
+
+        }
+    }
+
+
     /***
      * initTitle
      */
@@ -149,7 +181,7 @@ public class MainAbilitySlice extends BaseAbilitySlice implements Component.Clic
 
     private void setSearchAnimator(DirectionalLayout directionalLayout, Image searchimg, int p, Text text) {
         if (text.getTextColor().getValue() != cyan.getValue()) {
-            directionalLayout.createAnimatorProperty().scaleX(1.1f).scaleY(1.1f).setDuration(100).start();
+            directionalLayout.createAnimatorProperty().scaleX(NUM_1F).scaleY(NUM_1F).setDuration(NUM_100).start();
             searchimg.setPixelMap(p);
             text.setTextColor(cyan);
         }
@@ -170,10 +202,10 @@ public class MainAbilitySlice extends BaseAbilitySlice implements Component.Clic
     @Override
     protected void onBackPressed() {
         if (list.size() == 1) {
-           terminateAbility();
+            terminateAbility();
             return;
         }
-        Action action = (Action) list.get(list.size() - 2);
+        Action action = (Action) list.get(list.size() - NUM_2);
         int item = action.getItem();
         initComponent();
         if (action.getFraction() instanceof SearchFraction) {
@@ -183,7 +215,7 @@ public class MainAbilitySlice extends BaseAbilitySlice implements Component.Clic
         } else if (action.getFraction() instanceof ProFileFraction) {
             proFileFraction.setItem(item);
             setSearchAnimator(profile, profileImg, ResourceTable.Media_mine_true, profileText);
-            selectInt = 2;
+            selectInt = NUM_2;
         } else if (action.getFraction() instanceof FavoritesFraction) {
             favoritesFraction.setItem(item);
             setSearchAnimator(favorites, favoritesImg, ResourceTable.Media_heart_true, favoritesText);