隐藏导航栏

adb shell settings put global policy_control immersive.navigation=*

隐藏状态栏

adb shell settings put global policy_control immersive.status=*

导航栏、状态栏都隐藏

adb shell settings put global policy_control immersive.full=*

取消所有隐藏

adb shell settings put global policy_control null*