update fix scrolltoPosition crash

sparrow007 · May 29, 2021 · 239ead8 · 239ead8
1 parent 58a5f10
commit 239ead8
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Showing 2 changed files with 11 additions and 1 deletion.
diff --git a/app/src/main/java/com/jackandphantom/carousellayout/MainActivity.kt b/app/src/main/java/com/jackandphantom/carousellayout/MainActivity.kt
@@ -1,6 +1,7 @@
 package com.jackandphantom.carousellayout
 
 import android.os.Bundle
+import android.os.Handler
 import androidx.appcompat.app.AppCompatActivity
 import com.example.customviewimple.model.DataModel
 import com.jackandphantom.carousellayout.adapter.DataAdapter
@@ -25,9 +26,12 @@ class MainActivity : AppCompatActivity() {
         carouselRecyclerview.adapter = adapter
         carouselRecyclerview.set3DItem(true)
         carouselRecyclerview.setAlpha(true)
+
         val carouselLayoutManager = carouselRecyclerview.getCarouselLayoutManager()
         val currentlyCenterPosition = carouselRecyclerview.getSelectedPosition()
 
+        carouselLayoutManager.scrollToPosition(4)
+
 
     }
 }
diff --git a/...cyclerview/src/main/java/com/jackandphantom/carouselrecyclerview/CarouselLayoutManager.kt b/...cyclerview/src/main/java/com/jackandphantom/carouselrecyclerview/CarouselLayoutManager.kt
@@ -400,6 +400,12 @@ class CarouselLayoutManager constructor(
      */
     override fun scrollToPosition(position: Int) {
         if (position < 0 || position > itemCount - 1) return
+        if (!this::recycler.isInitialized || !this::state.isInitialized) {
+            isOrientationChange = true
+            selectedPosition = position
+            requestLayout()
+            return
+        }
         mOffsetAll = calculatePositionOffset(position)
         layoutItems(recycler,
             state,
@@ -422,7 +428,7 @@ class CarouselLayoutManager constructor(
         position: Int
     ) {
         //Loop does not support for smooth scrolling
-        if (mInfinite) return
+        if (mInfinite||!this::recycler.isInitialized || !this::state.isInitialized) return
         val finalOffset = calculatePositionOffset(position)
         startScroll(mOffsetAll, finalOffset)
     }