# android.system # android.system *** ** * ** *** Kotlin\|[Java](https://developer.android.com/reference/android/system/package-summary "View this page in Java") ## Classes |--------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [Int64Ref](https://developer.android.com/reference/kotlin/android/system/Int64Ref) | A signed 64bit integer reference suitable for passing to lower-level system calls. | | [Os](https://developer.android.com/reference/kotlin/android/system/Os) | Access to low-level system functionality. | | [OsConstants](https://developer.android.com/reference/kotlin/android/system/OsConstants) | Constants and helper functions for use with[Os](https://developer.android.com/reference/kotlin/android/system/Os). | | [StructCmsghdr](https://developer.android.com/reference/kotlin/android/system/StructCmsghdr) | Corresponds to C's`struct cmsghdr`. | | [StructDlInfo](https://developer.android.com/reference/kotlin/android/system/StructDlInfo) | Corresponds to C's`struct Dl_info`. | | [StructMsghdr](https://developer.android.com/reference/kotlin/android/system/StructMsghdr) | Corresponds to C's`struct msghdr` | | [StructPollfd](https://developer.android.com/reference/kotlin/android/system/StructPollfd) | Used as an in/out parameter to[Os.poll](https://developer.android.com/reference/kotlin/android/system/Os#poll(kotlin.Array,%20kotlin.Int)). | | [StructStat](https://developer.android.com/reference/kotlin/android/system/StructStat) | File information returned by[Os.fstat](https://developer.android.com/reference/kotlin/android/system/Os#fstat(java.io.FileDescriptor)),[Os.lstat](https://developer.android.com/reference/kotlin/android/system/Os#lstat(kotlin.String)), and[Os.stat](https://developer.android.com/reference/kotlin/android/system/Os#stat(kotlin.String)). | | [StructStatVfs](https://developer.android.com/reference/kotlin/android/system/StructStatVfs) | File information returned by[Os.fstatvfs](https://developer.android.com/reference/kotlin/android/system/Os#fstatvfs(java.io.FileDescriptor))and[Os.statvfs](https://developer.android.com/reference/kotlin/android/system/Os#statvfs(kotlin.String)). | | [StructTimespec](https://developer.android.com/reference/kotlin/android/system/StructTimespec) | Corresponds to C's`struct timespec`from``. | | [StructTimeval](https://developer.android.com/reference/kotlin/android/system/StructTimeval) | Corresponds to C's`struct timeval`from`sys/time.h`. | | [StructUtsname](https://developer.android.com/reference/kotlin/android/system/StructUtsname) | Information returned by[Os.uname](https://developer.android.com/reference/kotlin/android/system/Os#uname()). | | [SystemCleaner](https://developer.android.com/reference/kotlin/android/system/SystemCleaner) | Java. | | [VmSocketAddress](https://developer.android.com/reference/kotlin/android/system/VmSocketAddress) | A virtio-vsock address[VmSocketAddress](https://developer.android.com/reference/kotlin/android/system/VmSocketAddress). | ## Exceptions |------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------| | [ErrnoException](https://developer.android.com/reference/kotlin/android/system/ErrnoException) | A checked exception thrown when[Os](https://developer.android.com/reference/kotlin/android/system/Os)methods fail. |