diff --git a/MXAdapt/src/main/java/com/mx/adapt/scroller/MXScrollPickerView.kt b/MXAdapt/src/main/java/com/mx/adapt/scroller/MXScrollPickerView.kt
index 5012b6da64d9b382d4ca5523ffe8afaa798c2788..be8a321151704baa7ed95a182c520fbf91241434 100644
--- a/MXAdapt/src/main/java/com/mx/adapt/scroller/MXScrollPickerView.kt
+++ b/MXAdapt/src/main/java/com/mx/adapt/scroller/MXScrollPickerView.kt
@@ -18,19 +18,25 @@ class MXScrollPickerView @JvmOverloads constructor(
     context: Context, attrs: AttributeSet? = null
 ) : RecyclerView(context, attrs) {
     private val manager = LinearLayoutManager(context, LinearLayoutManager.VERTICAL, false)
-    private var dashColor: Int? = Color.parseColor("#33999999")
-    private var itemSize = 5
+    private val pickerAdapt = MXScrollPickerAdapt(this)
+
+    private var itemSize = 5 // 当前显示几条数据
     internal val itemOffset: Int
         get() = (itemSize - 1) / 2
-    internal val itemHeight get() = getAllHeight() / itemSize
+    internal val itemHeight get() = (getAllHeight() / itemSize)
 
     private var itemSelect: IMXSelect? = null
-    private val pickerAdapt = MXScrollPickerAdapt(this)
+    private var currentSelectIndex = NO_POSITION
+
+    // 中间选中的阴影
+    private var dashColor: Int? = Color.parseColor("#33999999")
+    private val dashPaint = Paint().apply { style = Paint.Style.FILL }
+    private val dashRectF = RectF()
 
     init {
         LinearSnapHelper().attachToRecyclerView(this)
         layoutManager = manager
-        adapter = pickerAdapt
+        super.setAdapter(pickerAdapt)
         pickerAdapt.setItemClick { position, _ ->
             smoothScrollTo(position - itemOffset, true)
         }
@@ -48,35 +54,36 @@ class MXScrollPickerView @JvmOverloads constructor(
 
         viewTreeObserver.addOnPreDrawListener(object : ViewTreeObserver.OnPreDrawListener {
             override fun onPreDraw(): Boolean {
-                pickerAdapt?.notifyDataSetChanged()
+                // MXUtils.log("onPreDraw width=$width,height=$height")
+                pickerAdapt.notifyDataSetChanged()
                 viewTreeObserver.removeOnPreDrawListener(this)
                 return true
             }
         })
     }
 
-    override fun onDraw(c: Canvas?) {
-        super.onDraw(c)
+    override fun setAdapter(adapter: Adapter<*>?) {
+//        super.setAdapter(adapter)
+        throw Exception("Forbidden call func 'setAdapter()'")
+    }
+
+    override fun onDraw(canvas: Canvas) {
+        super.onDraw(canvas)
         dashColor?.let { dash ->
             val itemHeight = itemHeight
             val itemOffset = itemOffset
-            c?.drawRect(
-                RectF(
-                    0f,
-                    itemHeight * itemOffset.toFloat(),
-                    width.toFloat(),
-                    itemHeight * (itemOffset + 1).toFloat()
-                ),
-                Paint().apply {
-                    color = dash
-                    style = Paint.Style.FILL
-                })
+            dashPaint.color = dash
+            dashRectF.left = 0f
+            dashRectF.right = width.toFloat()
+            dashRectF.top = itemHeight * itemOffset.toFloat()
+            dashRectF.bottom = itemHeight * (itemOffset + 1).toFloat()
+            canvas.drawRect(dashRectF, dashPaint)
         }
     }
 
     private fun getAllHeight() = height - paddingTop - paddingBottom
 
-    fun setDashColor(color: Int) {
+    fun setDashColor(color: Int?) {
         dashColor = color
         postInvalidate()
     }
@@ -85,26 +92,41 @@ class MXScrollPickerView @JvmOverloads constructor(
         if (size % 2 == 0) {
             throw Exception("数量不能为双数！")
         }
+        if (size < 3) {
+            throw Exception("最小显示行数为3")
+        }
         itemSize = size
+        postInvalidate()
         pickerAdapt.notifyDataSetChanged()
     }
 
-    fun setAdapt(adapt: MXBaseSimpleAdapt<*>) {
-        adapt.registerAdapterDataObserver(TypeObserver())
+    fun setMXAdapt(adapt: MXBaseSimpleAdapt<*>?) {
+        pickerAdapt.adapt?.unregisterAdapterDataObserver(adaptObserver)
         pickerAdapt.adapt = adapt
+        adapt?.registerAdapterDataObserver(adaptObserver)
+        pickerAdapt.notifyDataSetChanged()
     }
 
     fun setSelectIndex(index: Int, animation: Boolean = false) {
         val position = max(0, index)
+        // MXUtils.log("setSelectIndex")
         smoothScrollTo(position, animation)
-        post { smoothScrollTo(position, animation) }
+        post {
+            smoothScrollTo(position, animation)
+        }
+    }
+
+    fun currentSelectIndex(): Int {
+        return currentSelectIndex
     }
 
     fun setOnSelectListener(listener: IMXSelect?) {
         itemSelect = listener
-        notifySelectChange(manager.findFirstCompletelyVisibleItemPosition() - itemOffset)
+        notifySelectChange(manager.findFirstCompletelyVisibleItemPosition())
     }
 
+    private val adaptObserver = TypeObserver()
+
     private inner class TypeObserver : AdapterDataObserver() {
         override fun onChanged() {
             pickerAdapt.notifyDataSetChanged()
@@ -131,22 +153,17 @@ class MXScrollPickerView @JvmOverloads constructor(
         }
     }
 
-    override fun onAttachedToWindow() {
-        super.onAttachedToWindow()
-
-    }
-
-    private var currentSelectIndex = -1
     private fun notifySelectChange(index: Int) {
+        if (index < 0 && index != NO_POSITION) return
         val itemSelect = itemSelect ?: return
-        val targetIndex = if (index < 0) 0 else index
-        if (targetIndex == currentSelectIndex) return
-        currentSelectIndex = targetIndex
-        itemSelect.onSelect(targetIndex)
+        if (index == currentSelectIndex) return
+        currentSelectIndex = index
+
+        // MXUtils.log("notifySelectChange($index)")
+        itemSelect.onSelect(index)
     }
 
     private fun smoothScrollTo(position: Int, animation: Boolean) {
-        notifySelectChange(position)
         if (animation && itemHeight > 0) {
             val current = manager.findFirstCompletelyVisibleItemPosition()
             smoothScrollBy(
@@ -156,5 +173,6 @@ class MXScrollPickerView @JvmOverloads constructor(
         } else {
             manager.scrollToPositionWithOffset(position, 0)
         }
+        notifySelectChange(position)
     }
 }
\ No newline at end of file
diff --git a/README.md b/README.md
index 05dec2fb70625f590370c8359c4d2eedfb850ae8..a6a3ded699736407dfa14ea3e5c27033fb4eac6e 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 [![](https://jitpack.io/v/com.gitee.zhangmengxiong/MXRecycleAdapt.svg)](https://jitpack.io/#com.gitee.zhangmengxiong/MXRecycleAdapt)
 
 ```gradle
-    implementation 'com.gitee.zhangmengxiong:MXRecycleAdapt:1.2.5'
+    implementation 'com.gitee.zhangmengxiong:MXRecycleAdapt:1.2.6'
 ```
 #### 介绍
 adapt快速开发基类
diff --git a/app/src/main/java/com/mx/recycle_adapt/activity/ScrollerViewActivity.kt b/app/src/main/java/com/mx/recycle_adapt/activity/ScrollerViewActivity.kt
index c50391a677bdbe686d939af241453c1ee2c8c980..e48579c35ee7bc369b373acd92558c8d56efdd6d 100644
--- a/app/src/main/java/com/mx/recycle_adapt/activity/ScrollerViewActivity.kt
+++ b/app/src/main/java/com/mx/recycle_adapt/activity/ScrollerViewActivity.kt
@@ -22,7 +22,7 @@ class ScrollerViewActivity : AppCompatActivity() {
         adapt.notifyDataSetChanged()
 
         scrollerView.setItemSize(5)
-        scrollerView.setAdapt(adapt)
+        scrollerView.setMXAdapt(adapt)
 
         var currentIndex = 0
         scrollerView.setOnSelectListener(object : IMXSelect {
@@ -62,7 +62,7 @@ class ScrollerViewActivity : AppCompatActivity() {
 
         override fun bindView(position: Int, binding: ViewBinding, record: Int) {
             binding as AdaptSimpleIndexBinding
-            binding.indexTxv.text = "" + (record + 1)
+            binding.indexTxv.text = "" + (record)
         }
     }
 }
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index 6ba2131d74e877810a7ffbddbbe728df98813588..722418d9eb56be08bf3b12eef84483f1dbe96ee1 100644
--- a/build.gradle
+++ b/build.gradle
@@ -35,5 +35,5 @@ ext {
     minSdkVersion = 19
 
     versionCode = 1
-    versionName = "1.2.5"
+    versionName = "1.2.6"
 }
\ No newline at end of file