diff --git a/app/src/main/java/com/chad/baserecyclerviewadapterhelper/activity/dragswipe/DragAndSwipeDifferActivity.kt b/app/src/main/java/com/chad/baserecyclerviewadapterhelper/activity/dragswipe/DragAndSwipeDifferActivity.kt
index cf352e0d2..b1e055bb3 100644
--- a/app/src/main/java/com/chad/baserecyclerviewadapterhelper/activity/dragswipe/DragAndSwipeDifferActivity.kt
+++ b/app/src/main/java/com/chad/baserecyclerviewadapterhelper/activity/dragswipe/DragAndSwipeDifferActivity.kt
@@ -52,7 +52,7 @@ class DragAndSwipeDifferActivity : BaseViewBindingActivity<ActivityUniversalRecy
     private fun initRv() {
         viewBinding.rv.adapter = mAdapter
 
-        mAdapter.submitList(DataServer.getDiffUtilDemoEntities())
+        mAdapter.submitList(DataServer.diffUtilDemoEntities)
     }
 
 
diff --git a/app/src/main/java/com/chad/baserecyclerviewadapterhelper/activity/headerfooter/adapter/HeaderAndFooterAdapter.kt b/app/src/main/java/com/chad/baserecyclerviewadapterhelper/activity/headerfooter/adapter/HeaderAndFooterAdapter.kt
index 95ed16a18..2a809b09d 100644
--- a/app/src/main/java/com/chad/baserecyclerviewadapterhelper/activity/headerfooter/adapter/HeaderAndFooterAdapter.kt
+++ b/app/src/main/java/com/chad/baserecyclerviewadapterhelper/activity/headerfooter/adapter/HeaderAndFooterAdapter.kt
@@ -13,7 +13,7 @@ import com.chad.library.adapter.base.BaseQuickAdapter
  * https://github.com/CymChad/BaseRecyclerViewAdapterHelper
  */
 class HeaderAndFooterAdapter(list: List<Status>) :
-    BaseQuickAdapter<Status?, HeaderAndFooterAdapter.VH>(list) {
+    BaseQuickAdapter<Status, HeaderAndFooterAdapter.VH>(list) {
 
     class VH(var binding: ItemHeaderAndFooterBinding) : RecyclerView.ViewHolder(binding.root)
 
diff --git a/app/src/main/java/com/chad/baserecyclerviewadapterhelper/activity/home/adapter/HomeTopHeaderAdapter.kt b/app/src/main/java/com/chad/baserecyclerviewadapterhelper/activity/home/adapter/HomeTopHeaderAdapter.kt
index 62d11f259..59e0c807a 100644
--- a/app/src/main/java/com/chad/baserecyclerviewadapterhelper/activity/home/adapter/HomeTopHeaderAdapter.kt
+++ b/app/src/main/java/com/chad/baserecyclerviewadapterhelper/activity/home/adapter/HomeTopHeaderAdapter.kt
@@ -24,7 +24,7 @@ class HomeTopHeaderAdapter : BaseSingleItemAdapter<Any, HomeTopHeaderAdapter.VH>
     override fun onBindViewHolder(holder: VH, item: Any?) {
     }
 
-    override fun getItemViewType(position: Int, list: List<Any?>): Int {
+    override fun getItemViewType(position: Int, list: List<Any>): Int {
         return HEAD_VIEWTYPE
     }
 
diff --git a/app/src/main/java/com/chad/baserecyclerviewadapterhelper/activity/upfetch/adapter/UpFetchAdapter.kt b/app/src/main/java/com/chad/baserecyclerviewadapterhelper/activity/upfetch/adapter/UpFetchAdapter.kt
index f07cc04fa..35b2ffd66 100644
--- a/app/src/main/java/com/chad/baserecyclerviewadapterhelper/activity/upfetch/adapter/UpFetchAdapter.kt
+++ b/app/src/main/java/com/chad/baserecyclerviewadapterhelper/activity/upfetch/adapter/UpFetchAdapter.kt
@@ -14,7 +14,7 @@ import com.chad.library.adapter.base.BaseQuickAdapter
  * @date: 2019-12-06
  * @Description:
  */
-class UpFetchAdapter : BaseQuickAdapter<Movie?, UpFetchAdapter.VH>() {
+class UpFetchAdapter : BaseQuickAdapter<Movie, UpFetchAdapter.VH>() {
     class VH(
         parent: ViewGroup,
         val viewBinding: ItemHeaderAndFooterBinding = ItemHeaderAndFooterBinding.inflate(
diff --git a/app/src/main/java/com/chad/baserecyclerviewadapterhelper/data/DataServer.kt b/app/src/main/java/com/chad/baserecyclerviewadapterhelper/data/DataServer.kt
index 57ff2176e..8eaca6252 100644
--- a/app/src/main/java/com/chad/baserecyclerviewadapterhelper/data/DataServer.kt
+++ b/app/src/main/java/com/chad/baserecyclerviewadapterhelper/data/DataServer.kt
@@ -1,77 +1,70 @@
-package com.chad.baserecyclerviewadapterhelper.data;
+package com.chad.baserecyclerviewadapterhelper.data
 
-
-import com.chad.baserecyclerviewadapterhelper.entity.DiffEntity;
-import com.chad.baserecyclerviewadapterhelper.entity.Status;
-
-import java.util.ArrayList;
-import java.util.List;
+import com.chad.baserecyclerviewadapterhelper.entity.DiffEntity
+import com.chad.baserecyclerviewadapterhelper.entity.Status
 
 /**
  * https://github.com/CymChad/BaseRecyclerViewAdapterHelper
  */
-public class DataServer {
-
-    public static final String HTTPS_AVATARS1_GITHUBUSERCONTENT_COM_LINK = "https://avatars1.githubusercontent.com/u/7698209?v=3&s=460";
-    public static final String CYM_CHAD = "CymChad";
-    public static final String CHAY_CHAN = "ChayChan";
-
-    private DataServer() {
-    }
-
-    public static List<Status> getSampleData(int lenth) {
-        List<Status> list = new ArrayList<>();
-        for (int i = 0; i < lenth; i++) {
-            Status status = new Status();
-            status.setUserName("Chad" + i);
-            status.setCreatedAt("04/05/" + i);
-            status.setRetweet(i % 2 == 0);
-            status.setUserAvatar("https://avatars1.githubusercontent.com/u/7698209?v=3&s=460");
-            status.setText("BaseRecyclerViewAdpaterHelper https://www.recyclerview.org");
-            list.add(status);
+object DataServer {
+    const val HTTPS_AVATARS1_GITHUBUSERCONTENT_COM_LINK =
+        "https://avatars1.githubusercontent.com/u/7698209?v=3&s=460"
+    const val CYM_CHAD = "CymChad"
+    const val CHAY_CHAN = "ChayChan"
+    fun getSampleData(lenth: Int): List<Status> {
+        val list: MutableList<Status> = ArrayList()
+        for (i in 0 until lenth) {
+            val status = Status()
+            status.userName = "Chad$i"
+            status.createdAt = "04/05/$i"
+            status.isRetweet = i % 2 == 0
+            status.userAvatar = "https://avatars1.githubusercontent.com/u/7698209?v=3&s=460"
+            status.text = "BaseRecyclerViewAdpaterHelper https://www.recyclerview.org"
+            list.add(status)
         }
-        return list;
+        return list
     }
 
-    public static List<Status> addData(List list, int dataSize) {
-        for (int i = 0; i < dataSize; i++) {
-            Status status = new Status();
-            status.setUserName("Chad" + i);
-            status.setCreatedAt("04/05/" + i);
-            status.setRetweet(i % 2 == 0);
-            status.setUserAvatar("https://avatars1.githubusercontent.com/u/7698209?v=3&s=460");
-            status.setText("Powerful and flexible RecyclerAdapter https://github.com/CymChad/BaseRecyclerViewAdapterHelper");
-            list.add(status);
+    fun addData(list: MutableList<Status>, dataSize: Int): List<Status> {
+        for (i in 0 until dataSize) {
+            val status = Status()
+            status.userName = "Chad$i"
+            status.createdAt = "04/05/$i"
+            status.isRetweet = i % 2 == 0
+            status.userAvatar = "https://avatars1.githubusercontent.com/u/7698209?v=3&s=460"
+            status.text =
+                "Powerful and flexible RecyclerAdapter https://github.com/CymChad/BaseRecyclerViewAdapterHelper"
+            list.add(status)
         }
-
-        return list;
+        return list
     }
 
-
-
-    public static List<String> getStrData() {
-        List<String> list = new ArrayList<>();
-        for (int i = 0; i < 20; i++) {
-            String str = HTTPS_AVATARS1_GITHUBUSERCONTENT_COM_LINK;
-            if (i % 2 == 0) {
-                str = CYM_CHAD;
+    val strData: List<String>
+        get() {
+            val list: MutableList<String> = ArrayList()
+            for (i in 0..19) {
+                var str = HTTPS_AVATARS1_GITHUBUSERCONTENT_COM_LINK
+                if (i % 2 == 0) {
+                    str = CYM_CHAD
+                }
+                list.add(str)
             }
-            list.add(str);
+            return list
         }
-        return list;
-    }
-
-
-    public static List<DiffEntity> getDiffUtilDemoEntities() {
-        List<DiffEntity> list = new ArrayList<>();
-        for (int i = 0; i < 10; i++){
-            list.add(new DiffEntity(
-                    i,
-                    "Item " + i,
-                    "This item " + i + " content",
-                    "06-12")
-            );
+    @JvmStatic
+    val diffUtilDemoEntities: List<DiffEntity>
+        get() {
+            val list: MutableList<DiffEntity> = ArrayList()
+            for (i in 0..9) {
+                list.add(
+                    DiffEntity(
+                        i,
+                        "Item $i",
+                        "This item $i content",
+                        "06-12"
+                    )
+                )
+            }
+            return list
         }
-        return list;
-    }
-}
+}
\ No newline at end of file
diff --git a/library/src/main/java/com/chad/library/adapter/base/BaseDifferAdapter.kt b/library/src/main/java/com/chad/library/adapter/base/BaseDifferAdapter.kt
index 56c4ab265..dd712e2fd 100644
--- a/library/src/main/java/com/chad/library/adapter/base/BaseDifferAdapter.kt
+++ b/library/src/main/java/com/chad/library/adapter/base/BaseDifferAdapter.kt
@@ -1,5 +1,6 @@
 package com.chad.library.adapter.base
 
+import androidx.annotation.IntRange
 import androidx.recyclerview.widget.*
 import androidx.recyclerview.widget.AsyncListDiffer.ListListener
 import java.util.*
@@ -12,7 +13,7 @@ import java.util.*
  * @param T 数据类型
  * @param VH ViewHolder 类型
  */
-abstract class BaseDifferAdapter<T, VH : RecyclerView.ViewHolder>(
+abstract class BaseDifferAdapter<T : Any, VH : RecyclerView.ViewHolder>(
     config: AsyncDifferConfig<T>, items: List<T>
 ) : BaseQuickAdapter<T, VH>() {
 
diff --git a/library/src/main/java/com/chad/library/adapter/base/BaseMultiItemAdapter.kt b/library/src/main/java/com/chad/library/adapter/base/BaseMultiItemAdapter.kt
index 19ec4ce2e..f7d9a5574 100644
--- a/library/src/main/java/com/chad/library/adapter/base/BaseMultiItemAdapter.kt
+++ b/library/src/main/java/com/chad/library/adapter/base/BaseMultiItemAdapter.kt
@@ -12,7 +12,7 @@ import java.lang.ref.WeakReference
  * 多类型布局
  *
  */
-abstract class BaseMultiItemAdapter<T>(items: List<T> = emptyList()) :
+abstract class BaseMultiItemAdapter<T : Any>(items: List<T> = emptyList()) :
     BaseQuickAdapter<T, RecyclerView.ViewHolder>(items) {
 
     private val typeViewHolders =
@@ -142,7 +142,7 @@ abstract class BaseMultiItemAdapter<T>(items: List<T> = emptyList()) :
      * @param V
      * @constructor Create empty On multi item
      */
-    abstract class OnMultiItem<T, V : RecyclerView.ViewHolder> : OnMultiItemAdapterListener<T, V> {
+    abstract class OnMultiItem<T : Any, V : RecyclerView.ViewHolder> : OnMultiItemAdapterListener<T, V> {
         internal var weakA: WeakReference<BaseMultiItemAdapter<T>>? = null
 
         val adapter: BaseMultiItemAdapter<T>?
diff --git a/library/src/main/java/com/chad/library/adapter/base/BaseQuickAdapter.kt b/library/src/main/java/com/chad/library/adapter/base/BaseQuickAdapter.kt
index 99c177cad..d374a0263 100644
--- a/library/src/main/java/com/chad/library/adapter/base/BaseQuickAdapter.kt
+++ b/library/src/main/java/com/chad/library/adapter/base/BaseQuickAdapter.kt
@@ -28,7 +28,7 @@ import java.util.Collections
  * @param VH : BaseViewHolder
  * @constructor layoutId, data(Can null parameters, the default is empty data)
  */
-abstract class BaseQuickAdapter<T, VH : RecyclerView.ViewHolder>(
+abstract class BaseQuickAdapter<T : Any, VH : RecyclerView.ViewHolder>(
     open var items: List<T> = emptyList()
 ) : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
 
@@ -742,19 +742,19 @@ abstract class BaseQuickAdapter<T, VH : RecyclerView.ViewHolder>(
     }
 
 
-    fun interface OnItemClickListener<T> {
+    fun interface OnItemClickListener<T : Any> {
         fun onClick(adapter: BaseQuickAdapter<T, *>, view: View, position: Int)
     }
 
-    fun interface OnItemLongClickListener<T> {
+    fun interface OnItemLongClickListener<T : Any> {
         fun onLongClick(adapter: BaseQuickAdapter<T, *>, view: View, position: Int): Boolean
     }
 
-    fun interface OnItemChildClickListener<T> {
+    fun interface OnItemChildClickListener<T : Any> {
         fun onItemClick(adapter: BaseQuickAdapter<T, *>, view: View, position: Int)
     }
 
-    fun interface OnItemChildLongClickListener<T> {
+    fun interface OnItemChildLongClickListener<T : Any> {
         fun onItemLongClick(adapter: BaseQuickAdapter<T, *>, view: View, position: Int): Boolean
     }
 
diff --git a/library/src/main/java/com/chad/library/adapter/base/BaseSingleItemAdapter.kt b/library/src/main/java/com/chad/library/adapter/base/BaseSingleItemAdapter.kt
index 4ce7f80bb..03f1d12dc 100644
--- a/library/src/main/java/com/chad/library/adapter/base/BaseSingleItemAdapter.kt
+++ b/library/src/main/java/com/chad/library/adapter/base/BaseSingleItemAdapter.kt
@@ -10,8 +10,8 @@ import androidx.recyclerview.widget.RecyclerView
  * @param VH viewHolder类型 type of the viewHolder
  * @property mItem 数据 data
  */
-abstract class BaseSingleItemAdapter<T, VH : RecyclerView.ViewHolder>(private var mItem: T? = null) :
-    BaseQuickAdapter<Any?, VH>() {
+abstract class BaseSingleItemAdapter<T : Any, VH : RecyclerView.ViewHolder>(private var mItem: T? = null) :
+    BaseQuickAdapter<Any, VH>() {
 
     protected abstract fun onBindViewHolder(holder: VH, item: T?)
 
@@ -27,7 +27,7 @@ abstract class BaseSingleItemAdapter<T, VH : RecyclerView.ViewHolder>(private va
         onBindViewHolder(holder, mItem, payloads)
     }
 
-    final override fun getItemCount(items: List<Any?>): Int {
+    final override fun getItemCount(items: List<Any>): Int {
         return 1
     }
 
@@ -52,27 +52,27 @@ abstract class BaseSingleItemAdapter<T, VH : RecyclerView.ViewHolder>(private va
             notifyItemChanged(0)
         }
 
-    override fun submitList(list: List<Any?>?) {
+    override fun submitList(list: List<Any>?) {
         throw RuntimeException("Please use setItem()")
     }
 
-    override fun add(data: Any?) {
+    override fun add(data: Any) {
         throw RuntimeException("Please use setItem()")
     }
 
-    override fun add(position: Int, data: Any?) {
+    override fun add(position: Int, data: Any) {
         throw RuntimeException("Please use setItem()")
     }
 
-    override fun addAll(collection: Collection<Any?>) {
+    override fun addAll(collection: Collection<Any>) {
         throw RuntimeException("Please use setItem()")
     }
 
-    override fun addAll(position: Int, collection: Collection<Any?>) {
+    override fun addAll(position: Int, collection: Collection<Any>) {
         throw RuntimeException("Please use setItem()")
     }
 
-    override fun remove(data: Any?) {
+    override fun remove(data: Any) {
         throw RuntimeException("Please use setItem()")
     }
 
@@ -80,7 +80,7 @@ abstract class BaseSingleItemAdapter<T, VH : RecyclerView.ViewHolder>(private va
         throw RuntimeException("Please use setItem()")
     }
 
-    override fun set(position: Int, data: Any?) {
+    override fun set(position: Int, data: Any) {
         throw RuntimeException("Please use setItem()")
     }
 }
\ No newline at end of file
diff --git a/library/src/main/java/com/chad/library/adapter/base/util/ItemClickUtils.kt b/library/src/main/java/com/chad/library/adapter/base/util/ItemClickUtils.kt
index 02561c1e1..ff0d433f2 100644
--- a/library/src/main/java/com/chad/library/adapter/base/util/ItemClickUtils.kt
+++ b/library/src/main/java/com/chad/library/adapter/base/util/ItemClickUtils.kt
@@ -11,7 +11,7 @@ import com.chad.library.adapter.base.BaseQuickAdapter
  * @date 2023/5/29
  * @description
  */
-private abstract class DebouncedClickListener<T>(private val interval: Long) :
+private abstract class DebouncedClickListener<T : Any>(private val interval: Long) :
     BaseQuickAdapter.OnItemClickListener<T>, BaseQuickAdapter.OnItemChildClickListener<T> {
     private var mLastClickTime: Long = 0
 
@@ -46,7 +46,7 @@ private abstract class DebouncedClickListener<T>(private val interval: Long) :
  * @param block
  * @receiver
  */
-fun <T, VH : RecyclerView.ViewHolder> BaseQuickAdapter<T, VH>.setOnDebouncedItemClick(
+fun <T : Any, VH : RecyclerView.ViewHolder> BaseQuickAdapter<T, VH>.setOnDebouncedItemClick(
     time: Long = 500,
     block: BaseQuickAdapter.OnItemClickListener<T>
 ) = this.setOnItemClickListener(object : DebouncedClickListener<T>(time) {
@@ -62,7 +62,7 @@ fun <T, VH : RecyclerView.ViewHolder> BaseQuickAdapter<T, VH>.setOnDebouncedItem
  * @param block
  * @receiver
  */
-fun <T, VH : RecyclerView.ViewHolder> BaseQuickAdapter<T, VH>.addOnDebouncedChildClick(
+fun <T : Any, VH : RecyclerView.ViewHolder> BaseQuickAdapter<T, VH>.addOnDebouncedChildClick(
     @IdRes id: Int,
     time: Long = 500,
     block: BaseQuickAdapter.OnItemChildClickListener<T>