Fiz blink issue for AnimatedList

lib/src/animation/provider/animation_effect.dart

@@ -53,17 +53,16 @@ class EffectEntry {
   Duration get begin => delay;
 
   /// The end time for this entry.
-  Duration get end => duration;
+  Duration get end => begin+duration;
 
   /// Builds a sub-animation based on the properties of this entry.
   CurveTween buildAnimation({
     required Duration totalDuration,
     Curve? curve,
   }) {
-    int ttlT = duration.inMicroseconds;
     int beginT = begin.inMicroseconds, endT = end.inMicroseconds;
     return CurveTween(
-      curve: Interval(beginT / ttlT, endT / totalDuration.inMicroseconds,
+      curve: Interval(beginT / totalDuration.inMicroseconds, endT / totalDuration.inMicroseconds,
           curve: curve ?? this.curve),
     );
   }

lib/src/builder/motion_animated_builder.dart

@@ -115,6 +115,7 @@ class MotionBuilderState extends State<MotionBuilder>
     for (int i = 0; i < widget.initialCount; i++) {
       childrenMap[i] = MotionData();
     }
+
     super.initState();
   }
 
@@ -485,10 +486,10 @@ class MotionBuilderState extends State<MotionBuilder>
         if (entry.key == itemIndex) {
           updatedChildrenMap[itemIndex] = motionData;
           updatedChildrenMap[entry.key + 1] =
-              entry.value.copyWith(startOffset: _itemOffsetAt(entry.key));
+              entry.value.copyWith(startOffset: _itemOffsetAt(entry.key), endOffset: _itemOffsetAt(entry.key+1), visible: false);
         } else if (entry.key > itemIndex) {
           updatedChildrenMap[entry.key + 1] =
-              entry.value.copyWith(startOffset: _itemOffsetAt(entry.key));
+              entry.value.copyWith(startOffset: _itemOffsetAt(entry.key), endOffset: _itemOffsetAt(entry.key+1), visible: false);
         } else {
           updatedChildrenMap[entry.key] = entry.value;
         }
@@ -586,7 +587,7 @@ class MotionBuilderState extends State<MotionBuilder>
           continue;
         } else {
           updatedChildrenMap[entry.key - 1] = childrenMap[entry.key]!
-              .copyWith(startOffset: _itemOffsetAt(entry.key));
+              .copyWith(startOffset: _itemOffsetAt(entry.key), endOffset: _itemOffsetAt(entry.key-1), visible: false);
         }
       }
     }
@@ -600,11 +601,14 @@ class MotionBuilderState extends State<MotionBuilder>
     final itemRenderBox =
         _items[index]?.context.findRenderObject() as RenderBox?;
     if (itemRenderBox == null) return Offset.zero;
+
+
     return itemRenderBox.localToGlobal(Offset.zero);
   }
 
   @override
   Widget build(BuildContext context) {
+
     super.build(context);
     return widget.delegateBuilder != null
         ? SliverGrid(
@@ -648,6 +652,7 @@ class MotionBuilderState extends State<MotionBuilder>
       index: index,
       key: itemGlobalKey,
       motionData: motionData,
+      isGrid: isGrid,
       updateMotionData: (MotionData motionData) {
         final itemOffset = _itemOffsetAt(index);
         childrenMap[index] = motionData.copyWith(

lib/src/builder/motion_list_base.dart

@@ -156,23 +156,22 @@ abstract class MotionListBaseState<
   void addEffect(AnimationEffect effect, List<EffectEntry> enteries,
       {required bool enter}) {
     Duration zero = Duration.zero;
-
-    if (effect.duration != null) {
-      if (enter) {
-        _enterDuration = effect.duration! > _enterDuration
-            ? effect.duration!
+    final timeForAnimation= (effect.delay??zero) + (effect.duration??kAnimationDuration);
+    if (enter) {
+        _enterDuration = timeForAnimation > _enterDuration
+            ? timeForAnimation
             : _enterDuration;
         assert(_enterDuration >= zero, "Duration can not be negative");
       } else {
         _exitDuration =
-            effect.duration! > _exitDuration ? effect.duration! : _exitDuration;
+            timeForAnimation > _exitDuration ? timeForAnimation : _exitDuration;
         assert(_exitDuration >= zero, "Duration can not be negative");
       }
-    }
+
     EffectEntry entry = EffectEntry(
         animationEffect: effect,
         delay: effect.delay ?? zero,
-        duration: effect.duration ?? removeDuration,
+        duration: effect.duration ?? kAnimationDuration,
         curve: effect.curve ?? Curves.linear);
 
     enteries.add(entry);
@@ -203,7 +202,7 @@ abstract class MotionListBaseState<
       Widget animatedChild = child;
       for (EffectEntry entry in _enterAnimations) {
         animatedChild = entry.animationEffect
-            .build(context, animatedChild, animation, entry, enterDuration);
+            .build(context, animatedChild, animation, entry, insertDuration);
       }
       return animatedChild;
     }
@@ -219,7 +218,7 @@ abstract class MotionListBaseState<
       Widget animatedChild = child;
       for (EffectEntry entry in _exitAnimations) {
         animatedChild = entry.animationEffect
-            .build(context, animatedChild, animation, entry, exitDuration);
+            .build(context, animatedChild, animation, entry, removeDuration);
       }
       return animatedChild;
     }

lib/src/component/motion_animated_content.dart

@@ -6,14 +6,17 @@ class MotionAnimatedContent extends StatefulWidget {
   final Widget child;
   final Function(MotionData)? updateMotionData;
   final CapturedThemes? capturedThemes;
+  final bool isGrid;
 
   const MotionAnimatedContent(
       {Key? key,
       required this.index,
       required this.motionData,
       required this.child,
       this.updateMotionData,
-      required this.capturedThemes})
+      required this.capturedThemes,
+      required this.isGrid,
+      })
       : super(key: key);
 
   @override
@@ -86,6 +89,9 @@ class MotionAnimatedContentState extends State<MotionAnimatedContent>
           visible = true;
         });
       }
+      if(oldWidget.index!= widget.index && !_dragging && widget.isGrid){
+        _updateAnimationTranslation();
+      }
       widget.updateMotionData?.call(widget.motionData);
     });
     super.didUpdateWidget(oldWidget);