Launcher3 多任务界面背景定制为壁纸背景

一 修改Launcher3中style属性overviewScrimColor为透明背景

diff --git a/packages/apps/Launcher3/res/values/styles.xml b/packages/apps/Launcher3/res/values/styles.xml
index c41f0e8..945595b 100644
--- a/res/values/styles.xml
+++ b/res/values/styles.xml
@@ -66,7 +66,7 @@
         <item name="workspaceSurfaceColor">@color/workspace_surface_color</item>
         <item name="dropTargetHoverTextColor">@color/drop_target_hover_text_color_light</item>
         <item name="dropTargetHoverButtonColor">@color/drop_target_hover_button_color_light</item>
-        <item name="overviewScrimColor">@color/overview_scrim</item>
+        <item name="overviewScrimColor">@android:color/transparent</item>
         <item name="preloadIconAccentColor">@color/preload_icon_accent_color_light</item>
         <item name="preloadIconBackgroundColor">@color/preload_icon_background_color_light</item>
         <item name="android:windowTranslucentStatus">false</item>
@@ -174,7 +174,7 @@
         <item name="loadingIconColor">#99FFFFFF</item>
         <item name="iconOnlyShortcutColor">#B3FFFFFF</item>
         <item name="eduHalfSheetBGColor">#DD000000</item>
-        <item name="overviewScrimColor">@color/overview_scrim_dark</item>
+        <item name="overviewScrimColor">@android:color/transparent</item>
         <item name="preloadIconAccentColor">@color/preload_icon_accent_color_dark</item>

二 禁用Recent卡片背景模糊效果

adb root
adb shell wm disable-blur 1 
# 只能**临时**关闭「窗口级模糊」包括 Recent 卡片、对话框背景等所有使用Window#setBackgroundBlurRadius的界面效果，重启后失效

三 修改效果