Fix NPE for checking for whether animators should play together
BUG: 29586505
Change-Id: Ic2a67d51d2ac8d5bfb11ed7773c7c7e413cc28c7
diff --git a/core/java/android/animation/AnimatorSet.java b/core/java/android/animation/AnimatorSet.java
index 7841d29..053ba7d 100644
--- a/core/java/android/animation/AnimatorSet.java
+++ b/core/java/android/animation/AnimatorSet.java
@@ -1064,15 +1064,15 @@
/**
* @hide
* TODO: For animatorSet defined in XML, we can use a flag to indicate what the play order
- * if defined (i.e. sequential or together), then we can use the flag instead of calculate
- * dynamically.
+ * if defined (i.e. sequential or together), then we can use the flag instead of calculating
+ * dynamically. Note that when AnimatorSet is empty this method returns true.
* @return whether all the animators in the set are supposed to play together
*/
public boolean shouldPlayTogether() {
updateAnimatorsDuration();
createDependencyGraph();
// All the child nodes are set out to play right after the delay animation
- return mRootNode.mChildNodes.size() == mNodes.size() - 1;
+ return mRootNode.mChildNodes == null || mRootNode.mChildNodes.size() == mNodes.size() - 1;
}
@Override
diff --git a/libs/hwui/PropertyValuesAnimatorSet.cpp b/libs/hwui/PropertyValuesAnimatorSet.cpp
index e416e0c..796c73b 100644
--- a/libs/hwui/PropertyValuesAnimatorSet.cpp
+++ b/libs/hwui/PropertyValuesAnimatorSet.cpp
@@ -29,7 +29,6 @@
PropertyAnimator* animator = new PropertyAnimator(propertyValuesHolder,
interpolator, startDelay, duration, repeatCount);
mAnimators.emplace_back(animator);
- setListener(new PropertyAnimatorSetListener(this));
// Check whether any child animator is infinite after adding it them to the set.
if (repeatCount == -1) {
@@ -42,6 +41,7 @@
setStartValue(0);
mLastFraction = 0.0f;
setInterpolator(new LinearInterpolator());
+ setListener(new PropertyAnimatorSetListener(this));
}
void PropertyValuesAnimatorSet::onFinished(BaseRenderNodeAnimator* animator) {
@@ -115,7 +115,7 @@
std::sort(mAnimators.begin(), mAnimators.end(), [](auto& a, auto&b) {
return a->getTotalDuration() < b->getTotalDuration();
});
- mDuration = mAnimators[mAnimators.size() - 1]->getTotalDuration();
+ mDuration = mAnimators.empty() ? 0 : mAnimators[mAnimators.size() - 1]->getTotalDuration();
mInitialized = true;
}