diff options
Diffstat (limited to 'src/com/android/launcher3/BaseRecyclerView.java')
-rw-r--r-- | src/com/android/launcher3/BaseRecyclerView.java | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/src/com/android/launcher3/BaseRecyclerView.java b/src/com/android/launcher3/BaseRecyclerView.java index 6dd029f17..140c28c0c 100644 --- a/src/com/android/launcher3/BaseRecyclerView.java +++ b/src/com/android/launcher3/BaseRecyclerView.java @@ -16,6 +16,8 @@ package com.android.launcher3; +import android.animation.Animator; +import android.animation.AnimatorListenerAdapter; import android.animation.ObjectAnimator; import android.content.Context; import android.content.res.Resources; @@ -315,13 +317,38 @@ public class BaseRecyclerView extends RecyclerView /** * Animates the visibility of the fast scroller popup. */ - private void animateFastScrollerVisibility(boolean visible) { + private void animateFastScrollerVisibility(final boolean visible) { ObjectAnimator anim = ObjectAnimator.ofFloat(this, "fastScrollerAlpha", visible ? 1f : 0f); anim.setDuration(visible ? 200 : 150); + anim.addListener(new AnimatorListenerAdapter() { + @Override + public void onAnimationStart(Animator animation) { + if (visible) { + onFastScrollingStart(); + } + } + + @Override + public void onAnimationEnd(Animator animation) { + if (!visible) { + onFastScrollingEnd(); + } + } + }); anim.start(); } /** + * To be overridden by subclasses. + */ + protected void onFastScrollingStart() {} + + /** + * To be overridden by subclasses. + */ + protected void onFastScrollingEnd() {} + + /** * Invalidates the fast scroller popup. */ protected void invalidateFastScroller(Rect bounds) { |