From 2d89ea84530559e2002a3a4009a50bac1e568507 Mon Sep 17 00:00:00 2001
From: Jon Miranda <jonmiranda@google.com>
Date: Thu, 4 May 2017 11:47:53 -0700
Subject: [PATCH] Fade in background scrim when resuming from screen off.

This change hides the hard cut off that appears when the Launcher
window is transitioning upwards when resuming from when the screen
is off.

Bug: 36446766

Change-Id: I0c0fe13ee9e08d27b94916d0407ef431d82b8d6a
---
 src/com/android/launcher3/Launcher.java       | 22 +++++++++++++++++++
 .../android/launcher3/LauncherAnimUtils.java  | 13 +++++++++++
 .../allapps/AllAppsBackgroundDrawable.java    |  4 +++-
 3 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index c96c2a7b9a..f77308e144 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -18,7 +18,9 @@ package com.android.launcher3;
 
 import android.Manifest;
 import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
 import android.animation.AnimatorSet;
+import android.animation.ObjectAnimator;
 import android.animation.ValueAnimator;
 import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
@@ -267,6 +269,8 @@ public class Launcher extends BaseActivity
     private boolean mHasFocus = false;
     private boolean mAttached = false;
 
+    private ObjectAnimator mScrimAnimator;
+
     private PopupDataProvider mPopupDataProvider;
 
     private View.OnTouchListener mHapticFeedbackTouchListener;
@@ -920,6 +924,24 @@ public class Launcher extends BaseActivity
         if (!isWorkspaceLoading()) {
             NotificationListener.setNotificationsChangedListener(mPopupDataProvider);
         }
+
+        if (mIsResumeFromActionScreenOff && mDragLayer.getBackground() != null) {
+            if (mScrimAnimator != null) {
+                mScrimAnimator.cancel();
+            }
+            mDragLayer.getBackground().setAlpha(0);
+            mScrimAnimator = ObjectAnimator.ofInt(mDragLayer.getBackground(),
+                    LauncherAnimUtils.DRAWABLE_ALPHA, 0, 255);
+            mScrimAnimator.addListener(new AnimatorListenerAdapter() {
+                @Override
+                public void onAnimationEnd(Animator animation) {
+                    mScrimAnimator = null;
+                }
+            });
+            mScrimAnimator.setDuration(600);
+            mScrimAnimator.setStartDelay(getWindow().getTransitionBackgroundFadeDuration());
+            mScrimAnimator.start();
+        }
     }
 
     @Override
diff --git a/src/com/android/launcher3/LauncherAnimUtils.java b/src/com/android/launcher3/LauncherAnimUtils.java
index 2be2021f1c..cfb9b570b0 100644
--- a/src/com/android/launcher3/LauncherAnimUtils.java
+++ b/src/com/android/launcher3/LauncherAnimUtils.java
@@ -21,6 +21,7 @@ import android.animation.AnimatorSet;
 import android.animation.ObjectAnimator;
 import android.animation.PropertyValuesHolder;
 import android.animation.ValueAnimator;
+import android.graphics.drawable.Drawable;
 import android.util.Property;
 import android.view.View;
 import android.view.ViewTreeObserver;
@@ -128,4 +129,16 @@ public class LauncherAnimUtils {
         return anim;
     }
 
+    public static final Property<Drawable, Integer> DRAWABLE_ALPHA =
+            new Property<Drawable, Integer>(Integer.TYPE, "drawableAlpha") {
+                @Override
+                public Integer get(Drawable drawable) {
+                    return drawable.getAlpha();
+                }
+
+                @Override
+                public void set(Drawable drawable, Integer alpha) {
+                    drawable.setAlpha(alpha);
+                }
+            };
 }
diff --git a/src/com/android/launcher3/allapps/AllAppsBackgroundDrawable.java b/src/com/android/launcher3/allapps/AllAppsBackgroundDrawable.java
index c71bc3166b..54c5bd0b21 100644
--- a/src/com/android/launcher3/allapps/AllAppsBackgroundDrawable.java
+++ b/src/com/android/launcher3/allapps/AllAppsBackgroundDrawable.java
@@ -25,6 +25,7 @@ import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
 import android.view.Gravity;
 
+import com.android.launcher3.LauncherAnimUtils;
 import com.android.launcher3.R;
 
 /**
@@ -119,7 +120,8 @@ public class AllAppsBackgroundDrawable extends Drawable {
         int finalAlphaI = (int) (finalAlpha * 255f);
         if (getAlpha() != finalAlphaI) {
             mBackgroundAnim = cancelAnimator(mBackgroundAnim);
-            mBackgroundAnim = ObjectAnimator.ofInt(this, "alpha", finalAlphaI);
+            mBackgroundAnim = ObjectAnimator.ofInt(this, LauncherAnimUtils.DRAWABLE_ALPHA,
+                    finalAlphaI);
             mBackgroundAnim.setDuration(duration);
             mBackgroundAnim.start();
         }