diff --git a/CHANGELOG.md b/CHANGELOG.md
index 62c8f7971a2d7aedb3d5e2dbe99146647f751db0..3e268df59117a1b486cb34e7a32f0309625846a1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,2 +1,6 @@
 ## 0.0.1-SNAPSHOT
-ohos第一个版本，完整实现了原库的全部api
+
+ohos第一个版本
+
+ * 实现了原库的大部分api
+ * ohos暂不支持设置最大高度
\ No newline at end of file
diff --git a/app/src/main/java/com/tylersuehr/chipexample/slice/MainAbilitySlice.java b/app/src/main/java/com/tylersuehr/chipexample/slice/MainAbilitySlice.java
index a43a609e98c19662dc325e3dc706b1528bffbac9..5ebc90f06c5cf9bbc09ad963d97a86e98c6ef063 100644
--- a/app/src/main/java/com/tylersuehr/chipexample/slice/MainAbilitySlice.java
+++ b/app/src/main/java/com/tylersuehr/chipexample/slice/MainAbilitySlice.java
@@ -17,6 +17,8 @@ package com.tylersuehr.chipexample.slice;
 
 import com.tylersuehr.chipexample.ResourceTable;
 import com.tylersuehr.chipexample.utils.KeyboardVisibilityEvent;
+import com.tylersuehr.chipexample.utils.KeyboardVisibilityEventListener;
+import com.tylersuehr.chipexample.utils.Unregistrar;
 import com.tylersuehr.chips.ChipDetailsView;
 import com.tylersuehr.chips.FlowLayout;
 import ohos.aafwk.ability.AbilitySlice;
@@ -200,7 +202,7 @@ public class MainAbilitySlice extends AbilitySlice implements Component.ClickedL
     /**
      * 获取屏幕宽度
      *
-     * @param context 上下文
+     * @param context context
      * @return 屏幕宽度
      */
     public static int getDisplayWidthInPx(Context context) {
diff --git a/app/src/main/java/com/tylersuehr/chipexample/utils/KeyboardVisibilityEvent.java b/app/src/main/java/com/tylersuehr/chipexample/utils/KeyboardVisibilityEvent.java
index af6db8d327c0ce96753a0c45f7ee0b3a609c4221..43b19f833d89e64208bc6bd7d5bc1dd294345562 100644
--- a/app/src/main/java/com/tylersuehr/chipexample/utils/KeyboardVisibilityEvent.java
+++ b/app/src/main/java/com/tylersuehr/chipexample/utils/KeyboardVisibilityEvent.java
@@ -18,8 +18,12 @@ package com.tylersuehr.chipexample.utils;
 import ohos.aafwk.ability.LifecycleObserver;
 import ohos.agp.components.Component;
 
+/**
+ * KeyboardVisibilityEvent
+ *
+ * @since 2021-06-22
+ */
 public class KeyboardVisibilityEvent {
-    private static final double KEYBOARD_MIN_HEIGHT_RATIO = 0.15;
     private Component mRootView;
     private LifecycleObserver mLifecycleObserver = null;
     private static KeyboardVisibilityEvent keyboardVisibilityEvent;