android.system - Android SDK | Android Developers
Android APIs
Added in API level 21
package

android.system

Classes

Os Access to low-level system functionality. 
OsConstants Constants and helper functions for use with Os
StructPollfd Used as an in/out parameter to poll(StructPollfd[], int)
StructStat File information returned by fstat(FileDescriptor), lstat(String), and stat(String)
StructStatVfs File information returned by fstatvfs(FileDescriptor) and statvfs(String)
StructUtsname Information returned by uname()

Exceptions

ErrnoException A checked exception thrown when Os methods fail.