http://www.cnblogs.com/sardine

/frameworks/base/core/res/res/drawable-nodpi/default_wallpaper.jpg
/packages/wallpapers/Basic/src/com/android/wallpaper/nexus/NexusWallpaper.java
/frameworks/base/core/res/res/values/config.xml/mediatek/config/xxx/ProjectConfig.mk
BOOT_LOGO = wvga 

開關機和關機充電圖
/mediatek/custom/common/uboot/logo/wvga

/packages/apps/Launcher2/res/values/wallpapers.xml
/packages/apps/Launcher2/res/drawable-mdpi/wallpaper_architecture.jpg
/packages/apps/Launcher2/res/drawable-mdpi/wallpaper_architecture_small.jpg
Launcher2 裡面預置桌面上的 Item
/packages/apps/Launcher2/res/xml/default_workspace.xml

鈴聲位置
/frameworks/base/data/sounds/newwavelabs／Backroad.ogg