Android 4.0（冰激凌三明治）推出了新功能，旨在让用户更清晰地了解并管控设备的网络数据使用情况。它全面监测所有数据流量，并支持设置警告阈值或限制门槛，当数据使用超过特定配额时，将触发通知或禁用移动数据。此外，还按应用级别跟踪数据使用情况，允许用户在设置中直观查看历史数据使用情况，并限制后台应用的数据使用。
Data Usage Technical Information
Android 4.0 (Ice Cream Sandwich) introduces new features that help users understand and control how their device uses network data. It monitors overall data usage, and supports warning or limit thresholds which will trigger notifications or disable mobile data when usage exceeds a specific quota.
Data usage is also tracked on a per-application basis, enabling users to visually explore historical usage in the Settings app. Users can also restrict how specific applications are allowed to use data when running in the background.
The documentation in this section is intended for systems integrators and mobile operators, to help explain technical details they should be aware of when porting Android to specific devices. These details are summarized below, and the android-porting mailing list is a good place for further discussion.
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