Sped up ActionBar and StatusBar animations

Animations to show/hide the ActionBar and StatusBar were very slow, given
the size of the objects and the distances covered by the sliding animations.
Also, the ActionBar animation was sometimes hiccuppy as it faded in/out.
This change eliminates the ActionBar fade (which is unnecessary) and speeds
up the animations (smaller durations and steeper interpolation curves). Also,
it eliminates the startDelay on the ActionBar show animation.

Issue #6564089 Options menu should slide in much quicker (nakasi/JB)

Change-Id: I2c8298301f7bf26bbbc94444e715420a2c029ba0

1 files changed, 24 insertions, 21 deletions

diff --git a/core/java/com/android/internal/app/ActionBarImpl.java b/core/java/com/android/internal/app/ActionBarImpl.java
index 234cb71..46478ca 100644
--- a/core/java/com/android/internal/app/ActionBarImpl.java
+++ b/core/java/com/android/internal/app/ActionBarImpl.java
@@ -673,26 +673,29 @@ public class ActionBarImpl extends ActionBar {
 
         if (mCurWindowVisibility == View.VISIBLE && (mShowHideAnimationEnabled
                 || fromSystem)) {
-            mTopVisibilityView.setAlpha(0);
-            mTopVisibilityView.setTranslationY(-mTopVisibilityView.getHeight());
+            mTopVisibilityView.setTranslationY(0); // because we're about to ask its window loc
+            float startingY = -mTopVisibilityView.getHeight();
+            if (fromSystem) {
+                int topLeft[] = {0, 0};
+                mTopVisibilityView.getLocationInWindow(topLeft);
+                startingY -= topLeft[1];
+            }
+            mTopVisibilityView.setTranslationY(startingY);
             AnimatorSet anim = new AnimatorSet();
-            AnimatorSet.Builder b = anim.play(ObjectAnimator.ofFloat(mTopVisibilityView, "alpha", 1));
-            b.with(ObjectAnimator.ofFloat(mTopVisibilityView, "translationY", 0));
+            AnimatorSet.Builder b = anim.play(ObjectAnimator.ofFloat(mTopVisibilityView,
+                    "translationY", 0));
             if (mContentView != null) {
                 b.with(ObjectAnimator.ofFloat(mContentView, "translationY",
-                        -mTopVisibilityView.getHeight(), 0));
+                        startingY, 0));
             }
             if (mSplitView != null && mContextDisplayMode == CONTEXT_DISPLAY_SPLIT) {
-                mSplitView.setAlpha(0);
                 mSplitView.setTranslationY(mSplitView.getHeight());
                 mSplitView.setVisibility(View.VISIBLE);
-                b.with(ObjectAnimator.ofFloat(mSplitView, "alpha", 1));
                 b.with(ObjectAnimator.ofFloat(mSplitView, "translationY", 0));
             }
             anim.setInterpolator(AnimationUtils.loadInterpolator(mContext,
-                    com.android.internal.R.interpolator.decelerate_quad));
-            anim.setDuration(mContext.getResources().getInteger(
-                    com.android.internal.R.integer.config_mediumAnimTime));
+                    com.android.internal.R.interpolator.decelerate_cubic));
+            anim.setDuration(250);
             // If this is being shown from the system, add a small delay.
             // This is because we will also be animating in the status bar,
             // and these two elements can't be done in lock-step.  So we give
@@ -700,9 +703,6 @@ public class ActionBarImpl extends ActionBar {
             // the action bar animates.  (This corresponds to the corresponding
             // case when hiding, where the status bar has a small delay before
             // starting.)
-            if (fromSystem) {
-                anim.setStartDelay(100);
-            }
             anim.addListener(mShowListener);
             mCurrentShowAnim = anim;
             anim.start();
@@ -734,23 +734,26 @@ public class ActionBarImpl extends ActionBar {
             mTopVisibilityView.setAlpha(1);
             mContainerView.setTransitioning(true);
             AnimatorSet anim = new AnimatorSet();
-            AnimatorSet.Builder b = anim.play(ObjectAnimator.ofFloat(mTopVisibilityView, "alpha", 0));
-            b.with(ObjectAnimator.ofFloat(mTopVisibilityView, "translationY",
-                    -mTopVisibilityView.getHeight()));
+            float endingY = -mTopVisibilityView.getHeight();
+            if (fromSystem) {
+                int topLeft[] = {0, 0};
+                mTopVisibilityView.getLocationInWindow(topLeft);
+                endingY -= topLeft[1];
+            }
+            AnimatorSet.Builder b = anim.play(ObjectAnimator.ofFloat(mTopVisibilityView,
+                    "translationY", endingY));
             if (mContentView != null) {
                 b.with(ObjectAnimator.ofFloat(mContentView, "translationY",
-                        0, -mTopVisibilityView.getHeight()));
+                        0, endingY));
             }
             if (mSplitView != null && mSplitView.getVisibility() == View.VISIBLE) {
                 mSplitView.setAlpha(1);
-                b.with(ObjectAnimator.ofFloat(mSplitView, "alpha", 0));
                 b.with(ObjectAnimator.ofFloat(mSplitView, "translationY",
                         mSplitView.getHeight()));
             }
             anim.setInterpolator(AnimationUtils.loadInterpolator(mContext,
-                    com.android.internal.R.interpolator.accelerate_quad));
-            anim.setDuration(mContext.getResources().getInteger(
-                    com.android.internal.R.integer.config_mediumAnimTime));
+                    com.android.internal.R.interpolator.accelerate_cubic));
+            anim.setDuration(250);
             anim.addListener(mHideListener);
             mCurrentShowAnim = anim;
             anim.start();