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added in API level 21

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. 
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