去除导航栏：设置导航栏宽度为0

vi OK8MM-android-source/frameworks/base/core/res/res/values/dimens.xml

P45

把navigation_bar_height和navigation_bar_height_landscape 这两处改成0

去除状态栏：设置状态栏宽度为0

vi OK8MM-android-source/frameworks/base/core/res/res/values/dimens.xml

P35

把status_bar_height处改成0dp