亲测可以，但那透明度就不明白了～！
首先，反编译systemUI.apk得到文件夹systemUI_src
依次打开systemUI_src/values/drawable.xml找到代码 <item type="drawable" name="notification_header_bg">#ff000000</item>
<item type="drawable" name="notification_tracking_bg">#d8000000 </item>将notification_header_bg>#ff000000改为#00000000
将notification_tracking_bg>#d8000000 改为notification_tracking_bg>@drawable/notification_tracking_bg
将320x480的图片重命名为notification_tracking_bg放入res/drawable_mdpi和drawable_hdpi里面，回编译，替换！
首先，反编译systemUI.apk得到文件夹systemUI_src
依次打开systemUI_src/values/drawable.xml找到代码 <item type="drawable" name="notification_header_bg">#ff000000</item>
<item type="drawable" name="notification_tracking_bg">#d8000000 </item>将notification_header_bg>#ff000000改为#00000000
将notification_tracking_bg>#d8000000 改为notification_tracking_bg>@drawable/notification_tracking_bg
将320x480的图片重命名为notification_tracking_bg放入res/drawable_mdpi和drawable_hdpi里面，回编译，替换！
