Allow missing end values for integer animations (#2487)

Fixes #2480
airbnb · Apr 1, 2024 · 4e1c3dc · 4e1c3dc
1 parent 6c6e5ff
commit 4e1c3dc
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diff --git a/lottie/src/main/java/com/airbnb/lottie/animation/keyframe/IntegerKeyframeAnimation.java b/lottie/src/main/java/com/airbnb/lottie/animation/keyframe/IntegerKeyframeAnimation.java
@@ -20,21 +20,23 @@ Integer getValue(Keyframe<Integer> keyframe, float keyframeProgress) {
    * Optimization to avoid autoboxing.
    */
   int getIntValue(Keyframe<Integer> keyframe, float keyframeProgress) {
-    if (keyframe.startValue == null || keyframe.endValue == null) {
+    if (keyframe.startValue == null) {
       throw new IllegalStateException("Missing values for keyframe.");
     }
 
+    int endValue = keyframe.endValue == null ? keyframe.getStartValueInt() : keyframe.getEndValueInt();
+
     if (valueCallback != null) {
       //noinspection ConstantConditions
       Integer value = valueCallback.getValueInternal(keyframe.startFrame, keyframe.endFrame,
-          keyframe.startValue, keyframe.endValue,
+          keyframe.startValue, endValue,
           keyframeProgress, getLinearCurrentKeyframeProgress(), getProgress());
       if (value != null) {
         return value;
       }
     }
 
-    return MiscUtils.lerp(keyframe.getStartValueInt(), keyframe.getEndValueInt(), keyframeProgress);
+    return MiscUtils.lerp(keyframe.getStartValueInt(), endValue, keyframeProgress);
   }
 
   /**