hide statusbar
grep "status_bar_height" * -nR
将下面文件中关于status_bar_height定义的改为0dip.
android4.0/frameworks/base/core/res/res/values-large/dimens.xml
android4.0/frameworks/base/core/res/res/values-sw480dp/dimens.xml
android4.0/frameworks/base/core/res/res/values-sw600dp/dimens.xml
android4.0/packages/apps/Launcher2/res/values-sw480dp/dimens.xml
android4.0/packages/apps/Launcher2/res/values-sw600dp/dimens.xml
android4.0/packages/apps/Launcher2/res/values/dimens.xml