ProcessManager

java.lang.Object
- ohos.os.ProcessManager

```
public class ProcessManager
extends Object
```
Obtains and manages process status.
This class provides process-related tools to obtain and manage process status, including the following functions:
- Obtaining the process startup and running time
- Obtaining the process ID (PID), thread ID (TID), and user ID (UID)
- Checking whether the current process is running in a 64-bit environment, or whether it is an isolated process
- Getting and setting the thread priority
- Sending a signal to the process
从以下版本开始:

3

构造器概要

构造器
构造器说明

ProcessManager()

构造器
构造器	说明
`ProcessManager()`

方法概要

所有方法静态方法具体方法
限定符和类型	方法	说明
`static int[]`	`getAvailableCores()`	Obtains CPU cores available for the current process on a multi-core device.
`static int`	`getGidByName(String name)`	Obtains the ID of the user group where a user belongs based on the user name.
`static long`	`getPastCpuTime()`	Obtains the CPU time (in milliseconds) from the time when the process starts to the current time.
`static int`	`getPid()`	Obtains the PID of the current process.
`static long`	`getStartRealtime()`	Obtains the elapsed real time (in milliseconds) taken from the start of the system to the start of the process.
`static long`	`getStartUptime()`	Obtains the elapsed time (in milliseconds) taken from the start of the system to the start of the process.
`static int`	`getThreadPriority(int tid)`	Obtains the thread priority based on the specified TID.
`static int`	`getTid()`	Obtains the TID of the current thread.
`static int`	`getUid()`	Obtains the UID of the current process.
`static int`	`getUidByName(String name)`	Obtains the UID based on the specified user name.
`static boolean`	`is64Bit()`	Checks whether the process is running in a 64-bit environment.
`static boolean`	`isAppUid(int uid)`	Checks whether the specified UID belongs to a particular application.
`static boolean`	`isIsolatedProcess()`	Checks whether the process is isolated.
`static void`	`kill(int pid)`	Kills a process based on its PID.
`static void`	`sendSignal(int pid, int signal)`	Sends the specified signal to the process based on its PID.
`static void`	`setThreadPriority(int priority)`	Sets the priority for the current thread.
`static void`	`setThreadPriority(int tid, int priority)`	Sets the priority for a thread based on its TID.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 构造器详细资料
  - ProcessManager
```
public ProcessManager()
```
- 方法详细资料
  - getStartUptime
```
public static final long getStartUptime()
```
    Obtains the elapsed time (in milliseconds) taken from the start of the system to the start of the process.
    The elapsed time does not include the system sleep time.
    
    返回:
    
    Returns the process start time represented by the elapsed time.
    
    从以下版本开始:
    
    3
    
    另请参阅:
    
    getStartRealtime()
  - getStartRealtime
```
public static final long getStartRealtime()
```
    Obtains the elapsed real time (in milliseconds) taken from the start of the system to the start of the process.
    The elapsed real time includes the system sleep time.
    
    返回:
    
    Returns the process start time represented by the elapsed real time.
    
    从以下版本开始:
    
    3
    
    另请参阅:
    
    getStartUptime()
  - getPastCpuTime
```
public static final long getPastCpuTime()
```
    Obtains the CPU time (in milliseconds) from the time when the process starts to the current time.
    
    返回:
    
    Returns the CPU time.
    
    从以下版本开始:
    
    3
  - getAvailableCores
```
public static final int[] getAvailableCores()
```
    Obtains CPU cores available for the current process on a multi-core device.
    The multi-core device may reserve multiple CPU cores for the current process. You can use this method to obtain available CPU cores when the process runs on the foreground.
    
    返回:
    
    Returns an array of available CPU cores if any; returns an empty array otherwise.
    
    从以下版本开始:
    
    3
  - getPid
```
public static final int getPid()
```
    Obtains the PID of the current process.
    
    返回:
    
    Returns the PID.
    
    从以下版本开始:
    
    3
  - getTid
```
public static final int getTid()
```
    Obtains the TID of the current thread.
    
    返回:
    
    Returns the TID.
    
    从以下版本开始:
    
    3
  - getUid
```
public static final int getUid()
```
    Obtains the UID of the current process.
    
    返回:
    
    Returns the UID.
    
    从以下版本开始:
    
    3
  - getUidByName
```
public static final int getUidByName(String name)
```
    Obtains the UID based on the specified user name.
    
    参数:
    
    name - Indicates the user name based on which the UID will be obtained.
    
    返回:
    
    Returns the UID if any; returns -1 otherwise.
    
    从以下版本开始:
    
    3
  - getGidByName
```
public static final int getGidByName(String name)
```
    Obtains the ID of the user group where a user belongs based on the user name.
    
    参数:
    
    name - Indicates the user name based on which the user group ID will be obtained.
    
    返回:
    
    Returns the user group ID if any; returns -1 otherwise.
    
    从以下版本开始:
    
    3
  - getThreadPriority
```
public static final int getThreadPriority(int tid)
                                   throws IllegalArgumentException
```
    Obtains the thread priority based on the specified TID.
    
    参数:
    
    tid - Indicates the TID.
    
    返回:
    
    Returns the thread priority.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if the TID is invalid.
    
    从以下版本开始:
    
    3
  - is64Bit
```
public static final boolean is64Bit()
```
    Checks whether the process is running in a 64-bit environment.
    
    返回:
    
    Returns true if the process is running in a 64-bit environment; returns false otherwise.
    
    从以下版本开始:
    
    3
  - isAppUid
```
public static boolean isAppUid(int uid)
```
    Checks whether the specified UID belongs to a particular application.
    
    参数:
    
    uid - Indicates the UID.
    
    返回:
    
    Returns true if the passed UID belongs to an application; returns false otherwise.
    
    从以下版本开始:
    
    3
  - isIsolatedProcess
```
public static final boolean isIsolatedProcess()
```
    Checks whether the process is isolated.
    
    返回:
    
    Returns true if the process is isolated; returns false otherwise.
    
    从以下版本开始:
    
    3
  - setThreadPriority
```
public static final void setThreadPriority(int priority)
                                    throws IllegalArgumentException,
                                           SecurityException
```
    Sets the priority for the current thread.
    
    参数:
    
    priority - Indicates the thread priority to set. The value ranges from -20 to 19, where -20 means the highest priority and 19 means the lowest.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if the thread does not exist.
    
    SecurityException - Throws this exception if the process does not have permission to change or use the thread priority.
    
    从以下版本开始:
    
    3
    
    另请参阅:
    
    setThreadPriority(int, int)
  - setThreadPriority
```
public static final void setThreadPriority(int tid,
                                           int priority)
                                    throws IllegalArgumentException,
                                           SecurityException
```
    Sets the priority for a thread based on its TID.
    
    参数:
    
    tid - Indicates the TID.
    
    priority - Indicates the thread priority to set. The value ranges from -20 to 19, where -20 means the highest priority and 19 means the lowest.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if the thread does not exist.
    
    SecurityException - Throws this exception if the process does not have permission to change or use the thread priority.
    
    从以下版本开始:
    
    3
    
    另请参阅:
    
    setThreadPriority(int)
  - sendSignal
```
public static final void sendSignal(int pid,
                                    int signal)
```
    Sends the specified signal to the process based on its PID.
    
    参数:
    
    pid - Indicates the PID.
    
    signal - Indicates the signal to send. The value ranges from 1 to 64.
    
    从以下版本开始:
    
    3
  - kill
```
public static final void kill(int pid)
```
    Kills a process based on its PID.
    
    参数:
    
    pid - Indicates the PID.
    
    从以下版本开始:
    
    3

类 ProcessManager

构造器概要

方法概要

从类继承的方法 java.lang.Object

构造器详细资料

ProcessManager

方法详细资料

getStartUptime

getStartRealtime

getPastCpuTime

getAvailableCores

getPid

getTid

getUid

getUidByName

getGidByName

getThreadPriority

is64Bit

isAppUid

isIsolatedProcess

setThreadPriority

setThreadPriority

sendSignal

kill