Make resize veil background adapt to theme.

Set the background of the resize veil to light or dark based on whether
dark theme is applied.
Video: http://recall/-/hJNEr4C0IUowK3TyPPf4wT/diSieIqfY6tdF5rsoOT0PH

Bug: 274773589
Test: Manual; resize apps with different caption colors.
Change-Id: Id94d81ae01ad0e9edeaed51591f539d4fe5eb913

2 files changed, 19 insertions, 0 deletions

diff --git a/libs/WindowManager/Shell/res/values/colors.xml b/libs/WindowManager/Shell/res/values/colors.xml
index c487e4afd678..0ffa1d9fe8f1 100644
--- a/libs/WindowManager/Shell/res/values/colors.xml
+++ b/libs/WindowManager/Shell/res/values/colors.xml
@@ -67,4 +67,6 @@
     <color name="desktop_mode_caption_menu_text_color">#191C1D</color>
     <color name="desktop_mode_caption_menu_buttons_color_inactive">#191C1D</color>
     <color name="desktop_mode_caption_menu_buttons_color_active">#00677E</color>
+    <color name="desktop_mode_resize_veil_light">#EFF1F2</color>
+    <color name="desktop_mode_resize_veil_dark">#1C1C17</color>
 </resources>
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/ResizeVeil.java b/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/ResizeVeil.java
index fa2d7a87c3cb..4899453ac991 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/ResizeVeil.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/ResizeVeil.java
@@ -19,8 +19,10 @@ package com.android.wm.shell.windowdecor;
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
 import android.animation.ValueAnimator;
+import android.annotation.ColorRes;
 import android.app.ActivityManager.RunningTaskInfo;
 import android.content.Context;
+import android.content.res.Configuration;
 import android.graphics.PixelFormat;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
@@ -109,6 +111,10 @@ public class ResizeVeil {
             t.reparent(mVeilSurface, parentSurface);
             mParentSurface = parentSurface;
         }
+
+        int backgroundColorId = getBackgroundColorId();
+        mViewHost.getView().setBackgroundColor(mContext.getColor(backgroundColorId));
+
         t.show(mVeilSurface)
                 .apply();
         final ValueAnimator animator = new ValueAnimator();
@@ -158,6 +164,17 @@ public class ResizeVeil {
         animator.start();
     }
 
+    @ColorRes
+    private int getBackgroundColorId() {
+        Configuration configuration = mContext.getResources().getConfiguration();
+        if ((configuration.uiMode & Configuration.UI_MODE_NIGHT_MASK)
+                == Configuration.UI_MODE_NIGHT_YES) {
+            return R.color.desktop_mode_resize_veil_dark;
+        } else {
+            return R.color.desktop_mode_resize_veil_light;
+        }
+    }
+
     /**
      * Dispose of veil when it is no longer needed, likely on close of its container decor.
      */