Actually call LauncherTransitionable.onLauncherTransitionStep().

Previously, it was only called at the start and end of the transition;
now it is called as the animation interpolates. Specifically, a dummy
ValueAnimator is played alongside the transition animation and calls
dispatchOnLauncherTransitionStep() as it goes.

One place where this is important is in Workspace, where
mTransitionProgress is used to determine things like whether the
workspace should accept a drop - hence the bug that caused apps dragged
from All Apps to vanish when dropped before the transition ended.

Bug: 24215358
Change-Id: I32cd633c53557305caf84e87c9a4d4f07eef2223

1 files changed, 18 insertions, 18 deletions

diff --git a/src/com/android/launcher3/LauncherAnimUtils.java b/src/com/android/launcher3/LauncherAnimUtils.java
index 6a248a332..fa20f0360 100644
--- a/src/com/android/launcher3/LauncherAnimUtils.java
+++ b/src/com/android/launcher3/LauncherAnimUtils.java
@@ -24,7 +24,6 @@ import android.animation.ValueAnimator;
 import android.annotation.TargetApi;
 import android.os.Build;
 import android.view.View;
-import android.view.ViewAnimationUtils;
 import android.view.ViewTreeObserver;
 
 import com.android.launcher3.util.UiThreadCircularReveal;
@@ -59,24 +58,25 @@ public class LauncherAnimUtils {
     // it should be cancelled
     public static void startAnimationAfterNextDraw(final Animator animator, final View view) {
         view.getViewTreeObserver().addOnDrawListener(new ViewTreeObserver.OnDrawListener() {
-                private boolean mStarted = false;
-                public void onDraw() {
-                    if (mStarted) return;
-                    mStarted = true;
-                    // Use this as a signal that the animation was cancelled
-                    if (animator.getDuration() == 0) {
-                        return;
-                    }
-                    animator.start();
-
-                    final ViewTreeObserver.OnDrawListener listener = this;
-                    view.post(new Runnable() {
-                            public void run() {
-                                view.getViewTreeObserver().removeOnDrawListener(listener);
-                            }
-                        });
+            private boolean mStarted = false;
+
+            public void onDraw() {
+                if (mStarted) return;
+                mStarted = true;
+                // Use this as a signal that the animation was cancelled
+                if (animator.getDuration() == 0) {
+                    return;
                 }
-            });
+                animator.start();
+
+                final ViewTreeObserver.OnDrawListener listener = this;
+                view.post(new Runnable() {
+                    public void run() {
+                        view.getViewTreeObserver().removeOnDrawListener(listener);
+                    }
+                });
+            }
+        });
     }
 
     public static void onDestroyActivity() {