Process

BLUETOOTH_UID

static val BLUETOOTH_UID: Int

Defines the UID/GID for the Bluetooth service process.

Value: 1002

FIRST_APPLICATION_UID

static val FIRST_APPLICATION_UID: Int

Defines the start of a range of UIDs (and GIDs), going from this number to LAST_APPLICATION_UID that are reserved for assigning to applications.

Value: 10000

INVALID_UID

static val INVALID_UID: Int

An invalid UID value.

Value: -1

LAST_APPLICATION_UID

static val LAST_APPLICATION_UID: Int

Last of application-specific UIDs starting at FIRST_APPLICATION_UID.

Value: 19999

PHONE_UID

static val PHONE_UID: Int

Defines the UID/GID under which the telephony code runs.

Value: 1001

ROOT_UID

static val ROOT_UID: Int

Defines the root UID.

Value: 0

SHELL_UID

static val SHELL_UID: Int

Defines the UID/GID for the user shell.

Value: 2000

SIGNAL_KILL

static val SIGNAL_KILL: Int

Value: 9

SIGNAL_QUIT

static val SIGNAL_QUIT: Int

Value: 3

SIGNAL_USR1

static val SIGNAL_USR1: Int

Value: 10

SYSTEM_UID

static val SYSTEM_UID: Int

Defines the UID/GID under which system code runs.

Value: 1000

THREAD_PRIORITY_AUDIO

static val THREAD_PRIORITY_AUDIO: Int

Standard priority of audio threads. Applications can not normally change to this priority. Use with setThreadPriority(int) and setThreadPriority(int,int), not with the normal java.lang.Thread class.

Value: -16

THREAD_PRIORITY_BACKGROUND

static val THREAD_PRIORITY_BACKGROUND: Int

Standard priority background threads. This gives your thread a slightly lower than normal priority, so that it will have less chance of impacting the responsiveness of the user interface. Use with setThreadPriority(int) and setThreadPriority(int,int), not with the normal java.lang.Thread class.

Value: 10

THREAD_PRIORITY_DEFAULT

static val THREAD_PRIORITY_DEFAULT: Int

Standard priority of application threads. Use with setThreadPriority(int) and setThreadPriority(int,int), not with the normal java.lang.Thread class.

Value: 0

THREAD_PRIORITY_DISPLAY

static val THREAD_PRIORITY_DISPLAY: Int

Standard priority of system display threads, involved in updating the user interface. Applications can not normally change to this priority. Use with setThreadPriority(int) and setThreadPriority(int,int), not with the normal java.lang.Thread class.

Value: -4

THREAD_PRIORITY_FOREGROUND

static val THREAD_PRIORITY_FOREGROUND: Int

Standard priority of threads that are currently running a user interface that the user is interacting with. Applications can not normally change to this priority; the system will automatically adjust your application threads as the user moves through the UI. Use with setThreadPriority(int) and setThreadPriority(int,int), not with the normal java.lang.Thread class.

Value: -2

THREAD_PRIORITY_LESS_FAVORABLE

static val THREAD_PRIORITY_LESS_FAVORABLE: Int

Minimum increment to make a priority less favorable.

Value: 1

THREAD_PRIORITY_LOWEST

static val THREAD_PRIORITY_LOWEST: Int

Lowest available thread priority. Only for those who really, really don't want to run if anything else is happening. Use with setThreadPriority(int) and setThreadPriority(int,int), not with the normal java.lang.Thread class.

Value: 19

THREAD_PRIORITY_MORE_FAVORABLE

static val THREAD_PRIORITY_MORE_FAVORABLE: Int

Minimum increment to make a priority more favorable.

Value: -1

THREAD_PRIORITY_URGENT_AUDIO

static val THREAD_PRIORITY_URGENT_AUDIO: Int

Standard priority of the most important audio threads. Applications can not normally change to this priority. Use with setThreadPriority(int) and setThreadPriority(int,int), not with the normal java.lang.Thread class.

Value: -19

THREAD_PRIORITY_URGENT_DISPLAY

static val THREAD_PRIORITY_URGENT_DISPLAY: Int

Standard priority of the most important display threads, for compositing the screen and retrieving input events. Applications can not normally change to this priority. Use with setThreadPriority(int) and setThreadPriority(int,int), not with the normal java.lang.Thread class.

Value: -8

THREAD_PRIORITY_VIDEO

static val THREAD_PRIORITY_VIDEO: Int

Standard priority of video threads. Applications can not normally change to this priority. Use with setThreadPriority(int) and setThreadPriority(int,int), not with the normal java.lang.Thread class.

Value: -10

WIFI_UID

static val WIFI_UID: Int

Defines the UID/GID for the WIFI native processes like wificond, supplicant, hostapd, vendor HAL, etc.

Value: 1010

getElapsedCpuTime

static fun getElapsedCpuTime(): Long

Returns elapsed milliseconds of the time this process has run.

getExclusiveCores

static fun getExclusiveCores(): IntArray!

On some devices, the foreground process may have one or more CPU cores exclusively reserved for it. This method can be used to retrieve which cores that are (if any), so the calling process can then use sched_setaffinity() to lock a thread to these cores. Note that the calling process must currently be running in the foreground for this method to return any cores. The CPU core(s) exclusively reserved for the foreground process will stay reserved for as long as the process stays in the foreground. As soon as a process leaves the foreground, those CPU cores will no longer be reserved for it, and will most likely be reserved for the new foreground process. It's not necessary to change the affinity of your process when it leaves the foreground (if you had previously set it to use a reserved core); the OS will automatically take care of resetting the affinity at that point.

getGidForName

static fun getGidForName(name: String!): Int

Returns the GID assigned to a particular user name, or -1 if there is none. If the given string consists of only numbers, it is converted directly to a gid.

getStartElapsedRealtime

static fun getStartElapsedRealtime(): Long

Return the SystemClock#elapsedRealtime() at which this process was started.

getStartUptimeMillis

static fun getStartUptimeMillis(): Long

Return the SystemClock#uptimeMillis() at which this process was started.

getThreadPriority

static fun getThreadPriority(tid: Int): Int

Return the current priority of a thread, based on Linux priorities.

getUidForName

static fun getUidForName(name: String!): Int

Returns the UID assigned to a particular user name, or -1 if there is none. If the given string consists of only numbers, it is converted directly to a uid.

is64Bit

static fun is64Bit(): Boolean

Returns true if the current process is a 64-bit runtime.

isApplicationUid

open static fun isApplicationUid(uid: Int): Boolean

Returns whether the given uid belongs to an application.

isIsolated

static fun isIsolated(): Boolean

Returns whether the current process is in an isolated sandbox.

killProcess

static fun killProcess(pid: Int): Unit

Kill the process with the given PID. Note that, though this API allows us to request to kill any process based on its PID, the kernel will still impose standard restrictions on which PIDs you are actually able to kill. Typically this means only the process running the caller's packages/application and any additional processes created by that app; packages sharing a common UID will also be able to kill each other's processes.

myPid

static fun myPid(): Int

Returns the identifier of this process, which can be used with killProcess and sendSignal.

myTid

static fun myTid(): Int

Returns the identifier of the calling thread, which be used with setThreadPriority(int,int).

myUid

static fun myUid(): Int

Returns the identifier of this process's uid. This is the kernel uid that the process is running under, which is the identity of its app-specific sandbox. It is different from myUserHandle in that a uid identifies a specific app sandbox in a specific user.

myUserHandle

open static fun myUserHandle(): UserHandle!

Returns this process's user handle. This is the user the process is running under. It is distinct from myUid() in that a particular user will have multiple distinct apps running under it each with their own uid.

sendSignal

static fun sendSignal(
    pid: Int, 
    signal: Int
): Unit

Send a signal to the given process.

setThreadPriority

static fun setThreadPriority(
    tid: Int, 
    priority: Int
): Unit

Set the priority of a thread, based on Linux priorities.

setThreadPriority

static fun setThreadPriority(priority: Int): Unit

Set the priority of the calling thread, based on Linux priorities. See setThreadPriority(int,int) for more information.

supportsProcesses

static fun supportsProcesses(): Boolean

Deprecated: This method always returns true. Do not use.

Determine whether the current environment supports multiple processes.