Post FlingRunnable using ViewCompat.postOnAnimation to sync with next animation timestep

Author: denizmveli

library/src/main/java/com/etsy/android/grid/ExtendableListView.java

@@ -1884,17 +1884,16 @@ void start(int initialVelocity) {
             int initialY = initialVelocity < 0 ? Integer.MAX_VALUE : 0;
             mLastFlingY = initialY;
             mScroller.fling(0, initialY, 0, initialVelocity, 0, Integer.MAX_VALUE, 0, Integer.MAX_VALUE);
-
             mTouchMode = TOUCH_MODE_FLINGING;
-            post(this);
+            postOnAnimate(this);
         }
 
         void startScroll(int distance, int duration) {
             int initialY = distance < 0 ? Integer.MAX_VALUE : 0;
             mLastFlingY = initialY;
             mScroller.startScroll(0, initialY, 0, distance, duration);
             mTouchMode = TOUCH_MODE_FLINGING;
-            post(this);
+            postOnAnimate(this);
         }
 
         private void endFling() {
@@ -1947,7 +1946,7 @@ public void run() {
                     if (more && !atEnd) {
                         invalidate();
                         mLastFlingY = y;
-                        post(this);
+                        postOnAnimate(this);
                     }
                     else {
                         endFling();
@@ -1956,6 +1955,11 @@ public void run() {
                 }
             }
         }
+
+    }
+
+    private void postOnAnimate(Runnable runnable) {
+        ViewCompat.postOnAnimation(this, runnable);
     }
 
     // //////////////////////////////////////////////////////////////////////////////////////////