Animate recent app icon in after activity transition

This prevents the icon from being eclipsed by the drag view
as it scales down.

Change-Id: I6d06414bf58ddbc95e51827358e8845897ee554d

3 files changed, 36 insertions, 0 deletions

diff --git a/quickstep/src/com/android/quickstep/NavBarSwipeInteractionHandler.java b/quickstep/src/com/android/quickstep/NavBarSwipeInteractionHandler.java
index 75db45b83..965696fe3 100644
--- a/quickstep/src/com/android/quickstep/NavBarSwipeInteractionHandler.java
+++ b/quickstep/src/com/android/quickstep/NavBarSwipeInteractionHandler.java
@@ -320,5 +320,9 @@ public class NavBarSwipeInteractionHandler extends InternalStateHandler {
 
     private void onAnimationToLauncherComplete() {
         mDragView.close(false);
+        View currentRecentsPage = mRecentsView.getPageAt(mRecentsView.getCurrentPage());
+        if (currentRecentsPage instanceof TaskView) {
+            ((TaskView) currentRecentsPage).animateIconToScale(1f);
+        }
     }
 }
diff --git a/quickstep/src/com/android/quickstep/RecentsView.java b/quickstep/src/com/android/quickstep/RecentsView.java
index a107343d1..fd9010dff 100644
--- a/quickstep/src/com/android/quickstep/RecentsView.java
+++ b/quickstep/src/com/android/quickstep/RecentsView.java
@@ -146,6 +146,9 @@ public class RecentsView extends PagedView {
     public void update(RecentsTaskLoadPlan loadPlan) {
         final RecentsTaskLoader loader = TouchInteractionService.getRecentsTaskLoader();
         setCurrentPage(0);
+        if (getPageAt(mCurrentPage) instanceof TaskView) {
+            ((TaskView) getPageAt(mCurrentPage)).setIconScale(0);
+        }
         TaskStack stack = loadPlan != null ? loadPlan.getTaskStack() : null;
         if (stack == null) {
             removeAllViews();
diff --git a/quickstep/src/com/android/quickstep/TaskView.java b/quickstep/src/com/android/quickstep/TaskView.java
index a0ad61869..d834881f6 100644
--- a/quickstep/src/com/android/quickstep/TaskView.java
+++ b/quickstep/src/com/android/quickstep/TaskView.java
@@ -59,6 +59,8 @@ public class TaskView extends FrameLayout implements TaskCallbacks, SwipeDetecto
      */
     private static final float SWIPE_DISTANCE_HEIGHT_PERCENTAGE = 0.38f;
 
+    private static final long SCALE_ICON_DURATION = 120;
+
     private static final Property<TaskView, Float> PROPERTY_SWIPE_PROGRESS =
             new Property<TaskView, Float>(Float.class, "swipe_progress") {
 
@@ -73,6 +75,19 @@ public class TaskView extends FrameLayout implements TaskCallbacks, SwipeDetecto
                 }
             };
 
+    private static final Property<TaskView, Float> SCALE_ICON_PROPERTY =
+            new Property<TaskView, Float>(Float.TYPE, "scale_icon") {
+                @Override
+                public Float get(TaskView taskView) {
+                    return taskView.mIconScale;
+                }
+
+                @Override
+                public void set(TaskView taskView, Float iconScale) {
+                    taskView.setIconScale(iconScale);
+                }
+            };
+
     private Task mTask;
     private TaskThumbnailView mSnapshotView;
     private ImageView mIconView;
@@ -81,6 +96,7 @@ public class TaskView extends FrameLayout implements TaskCallbacks, SwipeDetecto
     private float mSwipeProgress;
     private Interpolator mAlphaInterpolator;
     private Interpolator mSwipeAnimInterpolator;
+    private float mIconScale = 1f;
 
     public TaskView(Context context) {
         this(context, null);
@@ -259,4 +275,17 @@ public class TaskView extends FrameLayout implements TaskCallbacks, SwipeDetecto
         swipeAnimator.setInterpolator(mSwipeAnimInterpolator);
         swipeAnimator.start();
     }
+
+    public void animateIconToScale(float scale) {
+        ObjectAnimator.ofFloat(this, SCALE_ICON_PROPERTY, scale)
+                .setDuration(SCALE_ICON_DURATION).start();
+    }
+
+    protected void setIconScale(float iconScale) {
+        mIconScale = iconScale;
+        if (mIconView != null) {
+            mIconView.setScaleX(mIconScale);
+            mIconView.setScaleY(mIconScale);
+        }
+    }
 }