Android4.4 全屏幕模式，沉浸模式 & 在应用内开启透明状态栏和透明虚拟按钮

众所周知，Android从4.4开始，就进入了沉浸模式，下面的链接有个视频可以观看一下。

沉浸模式
http://www.cnbeta.com/articles/265297.htm
这里有个翻译过后的文档：
http://www.apkbus.com/design/patterns/fullscreen.html
https://developer.android.com/training/system-ui/immersive.html#nonsticky 这里有实践的说明：
http://www.cnblogs.com/zhengxt/p/3508485.html

Android4.4新的特性，在应用内开启透明状态栏和透明虚拟按钮

这篇文章写的非常好，写的非常细致。
http://www.cnblogs.com/zhengxt/p/3536905.html
官方文档：
https://developer.android.com/training/system-ui/status.html
更多4.4的新特性请移步：
http://developer.android.com/about/versions/android-4.4.html

如果你是做rom开发的，请一定重点看看这2个：

一：Immersive full-screen mode

To provide your app with a layout that fills the entire screen, the new

SYSTEM_UI_FLAG_IMMERSIVE

flag for

setSystemUiVisibility()

(when combined with

SYSTEM_UI_FLAG_HIDE_NAVIGATION

) enables a newimmersive full-screen
mode. While immersive full-screen mode is enabled, your activity continues to receive all touch events. The user can reveal the system bars with an inward swipe along the region where the system bars normally appear. This clears the

SYSTEM_UI_FLAG_HIDE_NAVIGATION

flag (and the

SYSTEM_UI_FLAG_FULLSCREEN

flag, if applied) so the system bars remain visible. However, if you'd like the system bars to hide again after a few moments, you can instead use the

SYSTEM_UI_FLAG_IMMERSIVE_STICKY

flag.

二：Translucent system bars

You can now make the system bars partially translucent with new themes,

Theme.Holo.NoActionBar.TranslucentDecor

and

Theme.Holo.Light.NoActionBar.TranslucentDecor

.
By enabling translucent system bars, your layout will fill the area behind the system bars, so you must also enable

fitsSystemWindows

for the portion of your layout that should not be covered by the system bars.

If you're creating a custom theme, set one of these themes as the parent theme or include the

windowTranslucentNavigation

and

windowTranslucentStatus

style properties in your theme.

扩展阅读：

android隐藏底部虚拟键Navigation Bar实现全屏

http://www.jcodecraeer.com/a/anzhuokaifa/androidkaifa/2013/0709/1426.html