VB获得其他程序的内存使用情况!

‘获取当前的程序内存占用（生成exe后运行）:

Private Sub Timer1_Timer()

Dim myUsage As Double

myUsage = RamUsage

Label1Caption = FormatUsage(myUsage) & "K (" & FormatUsage(myUsage / 1024) & " Mb)"

End Sub

Private Function RamUsage(Optional strProcess As String = "") As Double

If strProcess = "" Then strProcess = UCase(AppEXEName) & "EXE" 'Will count the current application as the process if no arguments given

Set objWMIService = GetObject("winmgmts:" & "{impersonationLevel=impersonate}!\\\root\cimv2")

Set colProcessList = objWMIServiceExecQuery("SELECT FROM Win32_Process WHERE Name='" & strProcess & "'")

For Each objProcess In colProcessList

RamUsage = objProcessworkingSetSize / 1024

Next

End Function

Private Function FormatUsage(tUsage As Double)

If Int(tUsage) = tUsage Then

If tUsage = 0 Then

FormatUsage = 0

Else

FormatUsage = Format(tUsage, "###,###")

End If

Else

FormatUsage = Format(tUsage, "###,####")

End If

End Function

首先

创建一个Bean用来存贮要得到的信

public class MonitorInfoBean {

/ 可使用内存 /

private long totalMemory;

/ 剩余内存 /

private long freeMemory;

/ 最大可使用内存 /

private long maxMemory;

/ *** 作系统 /

private String osName;

/ 总的物理内存 /

private long totalMemorySize;

/ 剩余的物理内存 /

private long freePhysicalMemorySize;

/ 已使用的物理内存 /

private long usedMemory;

/ 线程总数 /

private int totalThread;

/ cpu使用率 /

private double cpuRatio;

public long getFreeMemory() {

return freeMemory;

}

public void setFreeMemory(long freeMemory) {

thisfreeMemory = freeMemory;

}

public long getFreePhysicalMemorySize() {

return freePhysicalMemorySize;

}

public void setFreePhysicalMemorySize(long freePhysicalMemorySize) {

thisfreePhysicalMemorySize = freePhysicalMemorySize;

}

public long getMaxMemory() {

return maxMemory;

}

public void setMaxMemory(long maxMemory) {

thismaxMemory = maxMemory;

}

public String getOsName() {

return osName;

}

public void setOsName(String osName) {

thisosName = osName;

}

public long getTotalMemory() {

return totalMemory;

}

public void setTotalMemory(long totalMemory) {

thistotalMemory = totalMemory;

}

public long getTotalMemorySize() {

return totalMemorySize;

}

public void setTotalMemorySize(long totalMemorySize) {

thistotalMemorySize = totalMemorySize;

}

public int getTotalThread() {

return totalThread;

}

public void setTotalThread(int totalThread) {

thistotalThread = totalThread;

}

public long getUsedMemory() {

return usedMemory;

}

public void setUsedMemory(long usedMemory) {

thisusedMemory = usedMemory;

}

public double getCpuRatio() {

return cpuRatio;

}

public void setCpuRatio(double cpuRatio) {

thiscpuRatio = cpuRatio;

}

}

之后，建立bean的接口

public interface IMonitorService {

public MonitorInfoBean getMonitorInfoBean() throws Exception;

}

然后，就是最关键的，得到cpu的利用率，已用内存，可用内存，最大内存等信息。

import javaioInputStreamReader;

import javaioLineNumberReader;

import sunmanagementManagementFactory;

import comsunmanagementOperatingSystemMXBean;

import javaio;

import javautilStringTokenizer;

/

获取系统信息的业务逻辑实现类

@author GuoHuang

/

public class MonitorServiceImpl implements IMonitorService {

private static final int CPUTIME = 30;

private static final int PERCENT = 100;

private static final int FAULTLENGTH = 10;

private static final File versionFile = new File("/proc/version");

private static String linuxVersion = null;

/

获得当前的监控对象

@return 返回构造好的监控对象

@throws Exception

@author GuoHuang

/

public MonitorInfoBean getMonitorInfoBean() throws Exception {

int kb = 1024;

// 可使用内存

long totalMemory = RuntimegetRuntime()totalMemory() / kb;

// 剩余内存

long freeMemory = RuntimegetRuntime()freeMemory() / kb;

// 最大可使用内存

long maxMemory = RuntimegetRuntime()maxMemory() / kb;

OperatingSystemMXBean osmxb = (OperatingSystemMXBean) ManagementFactory

getOperatingSystemMXBean();

// *** 作系统

String osName = SystemgetProperty("osname");

// 总的物理内存

long totalMemorySize = osmxbgetTotalPhysicalMemorySize() / kb;

// 剩余的物理内存

long freePhysicalMemorySize = osmxbgetFreePhysicalMemorySize() / kb;

// 已使用的物理内存

long usedMemory = (osmxbgetTotalPhysicalMemorySize() - osmxb

getFreePhysicalMemorySize())

/ kb;

// 获得线程总数

ThreadGroup parentThread;

for (parentThread = ThreadcurrentThread()getThreadGroup(); parentThread

getParent() != null; parentThread = parentThreadgetParent())

;

int totalThread = parentThreadactiveCount();

double cpuRatio = 0;

if (osNametoLowerCase()startsWith("windows")) {

cpuRatio = thisgetCpuRatioForWindows();

}

else {

cpuRatio = thisgetCpuRateForLinux();

}

// 构造返回对象

MonitorInfoBean infoBean = new MonitorInfoBean();

infoBeansetFreeMemory(freeMemory);

infoBeansetFreePhysicalMemorySize(freePhysicalMemorySize);

infoBeansetMaxMemory(maxMemory);

infoBeansetOsName(osName);

infoBeansetTotalMemory(totalMemory);

infoBeansetTotalMemorySize(totalMemorySize);

infoBeansetTotalThread(totalThread);

infoBeansetUsedMemory(usedMemory);

infoBeansetCpuRatio(cpuRatio);

return infoBean;

}

private static double getCpuRateForLinux(){

InputStream is = null;

InputStreamReader isr = null;

BufferedReader brStat = null;

StringTokenizer tokenStat = null;

try{

Systemoutprintln("Get usage rate of CUP , linux version: "+linuxVersion);

Process process = RuntimegetRuntime()exec("top -b -n 1");

is = processgetInputStream();

isr = new InputStreamReader(is);

brStat = new BufferedReader(isr);

if(linuxVersionequals("24")){

brStatreadLine();

brStatreadLine();

brStatreadLine();

brStatreadLine();

tokenStat = new StringTokenizer(brStatreadLine());

tokenStatnextToken();

tokenStatnextToken();

String user = tokenStatnextToken();

tokenStatnextToken();

String system = tokenStatnextToken();

tokenStatnextToken();

String nice = tokenStatnextToken();

Systemoutprintln(user+" , "+system+" , "+nice);

user = usersubstring(0,userindexOf("%"));

system = systemsubstring(0,systemindexOf("%"));

nice = nicesubstring(0,niceindexOf("%"));

float userUsage = new Float(user)floatValue();

float systemUsage = new Float(system)floatValue();

float niceUsage = new Float(nice)floatValue();

return (userUsage+systemUsage+niceUsage)/100;

}else{

brStatreadLine();

brStatreadLine();

tokenStat = new StringTokenizer(brStatreadLine());

tokenStatnextToken();

tokenStatnextToken();

tokenStatnextToken();

tokenStatnextToken();

tokenStatnextToken();

tokenStatnextToken();

tokenStatnextToken();

String cpuUsage = tokenStatnextToken();

Systemoutprintln("CPU idle : "+cpuUsage);

Float usage = new Float(cpuUsagesubstring(0,cpuUsageindexOf("%")));

return (1-usagefloatValue()/100);

}

} catch(IOException ioe){

Systemoutprintln(ioegetMessage());

freeResource(is, isr, brStat);

return 1;

} finally{

freeResource(is, isr, brStat);

}

}

getTotalPrivateDirty()就是获得自己进程所独占的内存

getTotalPss()意思就是假如有A,B,C,D,E 5个进程共享一片10kb的内存，A,B,F 3个进程又另外共享了30kb的内存，那么进程A调用这个函数返回就是10/5+30/3=12

所以理论上只要监视getTotalPrivateDirty()就能监视自己进程的内存变化

最后附上代码

public void getThisProcessMemeryInfo() {

int pid = AndroidosProcessmyPid();

androidosDebugMemoryInfo[] memoryInfoArray = activityManagergetProcessMemoryInfo(new int[] {pid});

Logd(TAG, "本应用当前使用了" + (float)memoryInfoArray[0]getTotalPrivateDirty() / 1024 + "mb的内存");

}

File root = EnvironmentgetRootDirectory();

StatFs sf = new StatFs(rootgetPath());

long blockSize = sfgetBlockSize();

long blockCount = sfgetBlockCount();

long availCount = sfgetAvailableBlocks();

Logd("TAG", "block大小:" + blockSize + ",block数目:" + blockCount + ",总大小:"+ blockSize blockCount / (1024 1024) + "MB");

Logd("TAG","可用的block数目：:" + availCount + ",可用大小:" + availCount blockSize / (1024 1024)+ "MB");

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