Fixing stutter in AllApps transition

-> Tightened up the interpolator and decreased the duration of the
   AllApps-in animation. This removes many excess frames at the end
   of the transition, and frees up perf for swiping AllApps:
   (issue 5359751)
-> Changed when AllApps state gets reset -- now only after
   leaving home, and then pressing home, or when the screen
   turns off.

Change-Id: I76e988102da91c12cb52af01468cf9a81fe45545

4 files changed, 13 insertions, 8 deletions

diff --git a/res/values/config.xml b/res/values/config.xml
index ff8dede18..b8040e68f 100644
--- a/res/values/config.xml
+++ b/res/values/config.xml
@@ -23,8 +23,8 @@
 
     <!-- Fade/zoom in/out duration & scale in the AllApps transition.
          Note: This should be less than the workspaceShrinkTime as they happen together. -->
-    <integer name="config_appsCustomizeZoomInTime">700</integer>
-    <integer name="config_appsCustomizeZoomOutTime">700</integer>
+    <integer name="config_appsCustomizeZoomInTime">350</integer>
+    <integer name="config_appsCustomizeZoomOutTime">600</integer>
     <integer name="config_appsCustomizeZoomScaleFactor">7</integer>
     <integer name="config_appsCustomizeFadeInTime">250</integer>
     <integer name="config_appsCustomizeFadeOutTime">200</integer>
diff --git a/src/com/android/launcher2/AppsCustomizePagedView.java b/src/com/android/launcher2/AppsCustomizePagedView.java
index 4f5d83599..7bc4b511b 100644
--- a/src/com/android/launcher2/AppsCustomizePagedView.java
+++ b/src/com/android/launcher2/AppsCustomizePagedView.java
@@ -1360,8 +1360,14 @@ public class AppsCustomizePagedView extends PagedViewWithDraggableItems implemen
 
     @Override
     public void reset() {
-        updateCurrentTab(0);
-        invalidatePageData(0);
+        AppsCustomizeTabHost tabHost = getTabHost();
+        String tag = tabHost.getCurrentTabTag();
+        if (!tag.equals(tabHost.getTabTagForContentType(ContentType.Applications))) {
+            tabHost.setCurrentTabFromContent(ContentType.Applications);
+        }
+        if (mCurrentPage != 0) {
+            invalidatePageData(0);
+        }
     }
 
     private AppsCustomizeTabHost getTabHost() {
diff --git a/src/com/android/launcher2/Launcher.java b/src/com/android/launcher2/Launcher.java
index dc7b77e86..02f19ac09 100644
--- a/src/com/android/launcher2/Launcher.java
+++ b/src/com/android/launcher2/Launcher.java
@@ -1209,7 +1209,7 @@ public final class Launcher extends Activity
             }
 
             // Reset AllApps to its initial state
-            if (mAppsCustomizeTabHost != null) {
+            if (!alreadyOnHome && mAppsCustomizeTabHost != null) {
                 mAppsCustomizeTabHost.reset();
             }
         }
@@ -2187,7 +2187,6 @@ public final class Launcher extends Activity
 
         // Shrink workspaces away if going to AppsCustomize from workspace
         mWorkspace.changeState(Workspace.State.SMALL, animated);
-        //hideHotseat(animated);
 
         if (animated) {
             final ValueAnimator scaleAnim = ValueAnimator.ofFloat(0f, 1f).setDuration(duration);
diff --git a/src/com/android/launcher2/Workspace.java b/src/com/android/launcher2/Workspace.java
index 8a492a28e..d1f9617ac 100644
--- a/src/com/android/launcher2/Workspace.java
+++ b/src/com/android/launcher2/Workspace.java
@@ -1421,8 +1421,8 @@ public class Workspace extends SmoothPagedView
      * ZInterpolator compounded with an ease-out.
      */
     static class ZoomOutInterpolator implements TimeInterpolator {
-        private final ZInterpolator zInterpolator = new ZInterpolator(0.2f);
-        private final DecelerateInterpolator decelerate = new DecelerateInterpolator(1.8f);
+        private final DecelerateInterpolator decelerate = new DecelerateInterpolator(0.75f);
+        private final ZInterpolator zInterpolator = new ZInterpolator(0.13f);
 
         public float getInterpolation(float input) {
             return decelerate.getInterpolation(zInterpolator.getInterpolation(input));