获得android手机的CPU核心数

http://blog.youkuaiyun.com/stephen255/article/details/9056361

//CPU个数

private int getNumCores() {
    //Private Class to display only CPU devices in the directory listing
    class CpuFilter implements FileFilter {
        @Override
        public boolean accept(File pathname) {
            //Check if filename is "cpu", followed by a single digit number
            if(Pattern.matches("cpu[0-9]", pathname.getName())) {
                return true;
            }
            return false;
        }      
    }

    try {
        //Get directory containing CPU info
        File dir = new File("/sys/devices/system/cpu/");
        //Filter to only list the devices we care about
        File[] files = dir.listFiles(new CpuFilter());
        Log.d(TAG, "CPU Count: "+files.length);
        //Return the number of cores (virtual CPU devices)
        return files.length;
    } catch(Exception e) {
        //Print exception
        Log.d(TAG, "CPU Count: Failed.");
        e.printStackTrace();
        //Default to return 1 core
        return 1;
    }
}

不需要root权限。

/sys/devices/system/cpu/cpu0 ----------Cpu1

/sys/devices/system/cpu/cpu1 ----------Cpu2

获取CPU最大频率：

     // "/system/bin/cat" 命令行
     // "/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq" 存储最大频率的文件的路径

[java] view plain copy print ?

1. public static long getCpuFrequence() {  
2.         ProcessBuilder cmd;  
3.         try {  
4.             String[] args = { "/system/bin/cat",  
5.                     "/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq" };  
6.             cmd = new ProcessBuilder(args);  
7.   
8.             Process process = cmd.start();  
9.             BufferedReader reader = new BufferedReader(new InputStreamReader(  
10.                     process.getInputStream()));  
11.             String line = reader.readLine();  
12.             return StringUtils.parseLongSafe(line, 10, 0);  
13.         } catch (IOException ex) {  
14.             ex.printStackTrace();  
15.         }  
16.         return 0;  
17.     }  

public static long getCpuFrequence() {
                ProcessBuilder cmd;
                try {
                        String[] args = { "/system/bin/cat",
                                        "/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq" };
                        cmd = new ProcessBuilder(args);

                        Process process = cmd.start();
                        BufferedReader reader = new BufferedReader(new InputStreamReader(
                                        process.getInputStream()));
                        String line = reader.readLine();
                        return StringUtils.parseLongSafe(line, 10, 0);
                } catch (IOException ex) {
                        ex.printStackTrace();
                }
                return 0;
        }

// 获取CPU最小频率（单位KHZ）：

[java] view plain copy print ?

1. public static String getMinCpuFreq() {  
2.             String result = "";  
3.             ProcessBuilder cmd;  
4.             try {  
5.                     String[] args = { "/system/bin/cat",  
6.                                     "/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq" };  
7.                     cmd = new ProcessBuilder(args);  
8.                     Process process = cmd.start();  
9.                     InputStream in = process.getInputStream();  
10.                     byte[] re = new byte[24];  
11.                     while (in.read(re) != -1) {  
12.                             result = result + new String(re);  
13.                     }  
14.                     in.close();  
15.             } catch (IOException ex) {  
16.                     ex.printStackTrace();  
17.                     result = "N/A";  
18.             }  
19.             return result.trim();  
20.     }  

    public static String getMinCpuFreq() {
                String result = "";
                ProcessBuilder cmd;
                try {
                        String[] args = { "/system/bin/cat",
                                        "/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq" };
                        cmd = new ProcessBuilder(args);
                        Process process = cmd.start();
                        InputStream in = process.getInputStream();
                        byte[] re = new byte[24];
                        while (in.read(re) != -1) {
                                result = result + new String(re);
                        }
                        in.close();
                } catch (IOException ex) {
                        ex.printStackTrace();
                        result = "N/A";
                }
                return result.trim();
        }

// 实时获取CPU当前频率（单位KHZ）：

[java] view plain copy print ?

1. public static String getCurCpuFreq() {  
2.               String result = "N/A";  
3.               try {  
4.                       FileReader fr = new FileReader(  
5.                                       "/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq");  
6.                       BufferedReader br = new BufferedReader(fr);  
7.                       String text = br.readLine();  
8.                       result = text.trim();  
9.               } catch (FileNotFoundException e) {  
10.                       e.printStackTrace();  
11.               } catch (IOException e) {  
12.                       e.printStackTrace();  
13.               }  
14.               return result;  
15.       }  

  public static String getCurCpuFreq() {
                String result = "N/A";
                try {
                        FileReader fr = new FileReader(
                                        "/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq");
                        BufferedReader br = new BufferedReader(fr);
                        String text = br.readLine();
                        result = text.trim();
                } catch (FileNotFoundException e) {
                        e.printStackTrace();
                } catch (IOException e) {
                        e.printStackTrace();
                }
                return result;
        }

/ 获取CPU名字：

[java] view plain copy print ?

1. public static String getCpuName() {  
2.              try {  
3.                      FileReader fr = new FileReader("/proc/cpuinfo");  
4.                      BufferedReader br = new BufferedReader(fr);  
5.                      String text = br.readLine();  
6.                      String[] array = text.split(":\\s+", 2);  
7.                      for (int i = 0; i < array.length; i++) {  
8.                      }  
9.                      return array[1];  
10.              } catch (FileNotFoundException e) {  
11.                      e.printStackTrace();  
12.              } catch (IOException e) {  
13.                      e.printStackTrace();  
14.              }  
15.              return null;  
16.      }  

   public static String getCpuName() {
                try {
                        FileReader fr = new FileReader("/proc/cpuinfo");
                        BufferedReader br = new BufferedReader(fr);
                        String text = br.readLine();
                        String[] array = text.split(":\\s+", 2);
                        for (int i = 0; i < array.length; i++) {
                        }
                        return array[1];
                } catch (FileNotFoundException e) {
                        e.printStackTrace();
                } catch (IOException e) {
                        e.printStackTrace();
                }
                return null;
        }

内存：/proc/meminfo：

[java] view plain copy print ?

1. public void getTotalMemory() {    
2.         String str1 = "/proc/meminfo";    
3.         String str2="";    
4.         try {    
5.             FileReader fr = new FileReader(str1);    
6.             BufferedReader localBufferedReader = new BufferedReader(fr, 8192);    
7.             while ((str2 = localBufferedReader.readLine()) != null) {    
8.                 Log.i(TAG, "---" + str2);    
9.             }    
10.         } catch (IOException e) {    
11.         }    
12.     }   

public void getTotalMemory() {  
        String str1 = "/proc/meminfo";  
        String str2="";  
        try {  
            FileReader fr = new FileReader(str1);  
            BufferedReader localBufferedReader = new BufferedReader(fr, 8192);  
            while ((str2 = localBufferedReader.readLine()) != null) {  
                Log.i(TAG, "---" + str2);  
            }  
        } catch (IOException e) {  
        }  
    } 

Rom大小  www.2cto.com：

[java] view plain copy print ?

1. public long[] getRomMemroy() {    
2.         long[] romInfo = new long[2];    
3.         //Total rom memory     
4.         romInfo[0] = getTotalInternalMemorySize();    
5.      
6.         //Available rom memory     
7.         File path = Environment.getDataDirectory();    
8.         StatFs stat = new StatFs(path.getPath());    
9.         long blockSize = stat.getBlockSize();    
10.         long availableBlocks = stat.getAvailableBlocks();    
11.         romInfo[1] = blockSize * availableBlocks;    
12.         getVersion();    
13.         return romInfo;    
14.     }    
15.      
16.     public long getTotalInternalMemorySize() {    
17.         File path = Environment.getDataDirectory();    
18.         StatFs stat = new StatFs(path.getPath());    
19.         long blockSize = stat.getBlockSize();    
20.         long totalBlocks = stat.getBlockCount();    
21.         return totalBlocks * blockSize;    
22.     }   

public long[] getRomMemroy() {  
        long[] romInfo = new long[2];  
        //Total rom memory  
        romInfo[0] = getTotalInternalMemorySize();  
   
        //Available rom memory  
        File path = Environment.getDataDirectory();  
        StatFs stat = new StatFs(path.getPath());  
        long blockSize = stat.getBlockSize();  
        long availableBlocks = stat.getAvailableBlocks();  
        romInfo[1] = blockSize * availableBlocks;  
        getVersion();  
        return romInfo;  
    }  
   
    public long getTotalInternalMemorySize() {  
        File path = Environment.getDataDirectory();  
        StatFs stat = new StatFs(path.getPath());  
        long blockSize = stat.getBlockSize();  
        long totalBlocks = stat.getBlockCount();  
        return totalBlocks * blockSize;  
    } 

sdCard大小：

[java] view plain copy print ?

1. public long[] getSDCardMemory() {    
2.         long[] sdCardInfo=new long[2];    
3.         String state = Environment.getExternalStorageState();    
4.         if (Environment.MEDIA_MOUNTED.equals(state)) {    
5.             File sdcardDir = Environment.getExternalStorageDirectory();    
6.             StatFs sf = new StatFs(sdcardDir.getPath());    
7.             long bSize = sf.getBlockSize();    
8.             long bCount = sf.getBlockCount();    
9.             long availBlocks = sf.getAvailableBlocks();    
10.      
11.             sdCardInfo[0] = bSize * bCount;//总大小     
12.             sdCardInfo[1] = bSize * availBlocks;//可用大小     
13.         }    
14.         return sdCardInfo;    
15.     }   

public long[] getSDCardMemory() {  
        long[] sdCardInfo=new long[2];  
        String state = Environment.getExternalStorageState();  
        if (Environment.MEDIA_MOUNTED.equals(state)) {  
            File sdcardDir = Environment.getExternalStorageDirectory();  
            StatFs sf = new StatFs(sdcardDir.getPath());  
            long bSize = sf.getBlockSize();  
            long bCount = sf.getBlockCount();  
            long availBlocks = sf.getAvailableBlocks();  
   
            sdCardInfo[0] = bSize * bCount;//总大小  
            sdCardInfo[1] = bSize * availBlocks;//可用大小  
        }  
        return sdCardInfo;  
    } 

系统的版本信息：

[java] view plain copy print ?

1. public String[] getVersion(){    
2.     String[] version={"null","null","null","null"};    
3.     String str1 = "/proc/version";    
4.     String str2;    
5.     String[] arrayOfString;    
6.     try {    
7.         FileReader localFileReader = new FileReader(str1);    
8.         BufferedReader localBufferedReader = new BufferedReader(    
9.                 localFileReader, 8192);    
10.         str2 = localBufferedReader.readLine();    
11.         arrayOfString = str2.split("\\s+");    
12.         version[0]=arrayOfString[2];//KernelVersion     
13.         localBufferedReader.close();    
14.     } catch (IOException e) {    
15.     }    
16.     version[1] = Build.VERSION.RELEASE;// firmware version     
17.     version[2]=Build.MODEL;//model     
18.     version[3]=Build.DISPLAY;//system version     
19.     return version;    
20. }   

public String[] getVersion(){  
    String[] version={"null","null","null","null"};  
    String str1 = "/proc/version";  
    String str2;  
    String[] arrayOfString;  
    try {  
        FileReader localFileReader = new FileReader(str1);  
        BufferedReader localBufferedReader = new BufferedReader(  
                localFileReader, 8192);  
        str2 = localBufferedReader.readLine();  
        arrayOfString = str2.split("\\s+");  
        version[0]=arrayOfString[2];//KernelVersion  
        localBufferedReader.close();  
    } catch (IOException e) {  
    }  
    version[1] = Build.VERSION.RELEASE;// firmware version  
    version[2]=Build.MODEL;//model  
    version[3]=Build.DISPLAY;//system version  
    return version;  
} 

mac地址和开机时间

[java] view plain copy print ?

1. public String[] getOtherInfo(){    
2.     String[] other={"null","null"};    
3.        WifiManager wifiManager = (WifiManager) mContext.getSystemService(Context.WIFI_SERVICE);    
4.        WifiInfo wifiInfo = wifiManager.getConnectionInfo();    
5.        if(wifiInfo.getMacAddress()!=null){    
6.         other[0]=wifiInfo.getMacAddress();    
7.     } else {    
8.         other[0] = "Fail";    
9.     }    
10.     other[1] = getTimes();    
11.        return other;    
12. }    
13. private String getTimes() {    
14.     long ut = SystemClock.elapsedRealtime() / 1000;    
15.     if (ut == 0) {    
16.         ut = 1;    
17.     }    
18.     int m = (int) ((ut / 60) % 60);    
19.     int h = (int) ((ut / 3600));    
20.     return h + " " + mContext.getString(R.string.info_times_hour) + m + " "   
21.             + mContext.getString(R.string.info_times_minute);    
22. }   

public String[] getOtherInfo(){  
    String[] other={"null","null"};  
       WifiManager wifiManager = (WifiManager) mContext.getSystemService(Context.WIFI_SERVICE);  
       WifiInfo wifiInfo = wifiManager.getConnectionInfo();  
       if(wifiInfo.getMacAddress()!=null){  
        other[0]=wifiInfo.getMacAddress();  
    } else {  
        other[0] = "Fail";  
    }  
    other[1] = getTimes();  
       return other;  
}  
private String getTimes() {  
    long ut = SystemClock.elapsedRealtime() / 1000;  
    if (ut == 0) {  
        ut = 1;  
    }  
    int m = (int) ((ut / 60) % 60);  
    int h = (int) ((ut / 3600));  
    return h + " " + mContext.getString(R.string.info_times_hour) + m + " " 
            + mContext.getString(R.string.info_times_minute);  
} 

---------------------------------------------------

[java] view plain copy print ?

1. private static void updateCpuStat() {  
2.     ProcessBuilder cmd;  
3.     long oldMypidStat = first ? 0 : mypidStat;  
4.     long oldTotal = first ? 0 : total;  
5.   
6.     try {  
7.         StringBuilder builder = new StringBuilder();  
8.         int pid = android.os.Process.myPid();  
9.         String[] args = { "/system/bin/cat", "/proc/" + pid + "/stat" };  
10.         cmd = new ProcessBuilder(args);  
11.   
12.         Process process = cmd.start();  
13.         InputStream in = process.getInputStream();  
14.         byte[] re = new byte[1024];  
15.         int len;  
16.         while ((len = in.read(re)) != -1) {  
17.             builder.append(new String(re, 0, len));  
18.         }  
19.         // Log.i(TAG, builder.toString());   
20.         in.close();  
21.   
22.         String[] stats = builder.toString().split(" +", -1);  
23.         if (stats.length >= 17) {  
24.             long utime = StringUtils.parseLongSafe(stats[13], 10);  
25.             long stime = StringUtils.parseLongSafe(stats[14], 10);  
26.             long cutime = StringUtils.parseLongSafe(stats[15], 10);  
27.             long cstime = StringUtils.parseLongSafe(stats[16], 10);  
28.             // Log.i(TAG, String.format(   
29.             // "utime:%d, stime:%d, cutime:%d, cstime:%d", utime,   
30.             // stime, cutime, cstime));   
31.             mypidStat = utime + stime + cutime + cstime;  
32.         }  
33.     } catch (IOException ex) {  
34.         ex.printStackTrace();  
35.     }  
36.   
37.     try {  
38.         String[] args = { "/system/bin/cat", "/proc/stat" };  
39.         cmd = new ProcessBuilder(args);  
40.   
41.         Process process = cmd.start();  
42.         BufferedReader reader = new BufferedReader(new InputStreamReader(  
43.                 process.getInputStream()));  
44.         String line = null;  
45.         while ((line = reader.readLine()) != null) {  
46.             Matcher matcher = pattern.matcher(line);  
47.             if (matcher.matches()) {  
48.                 String[] stats = line.split(" +", -1);  
49.                 long tmpTotal = 0;  
50.                 for (int i = 1; i < stats.length; i++) {  
51.                     tmpTotal += StringUtils.parseLongSafe(stats[i], 10);  
52.                 }  
53.                 total = tmpTotal;  
54.             }  
55.             break;  
56.         }  
57.         if (first) {  
58.             first = false;  
59.         } else {  
60.             Log.i(TAG, String.format("vsir cpu usage: %2.1f%%",  
61.                     (double) (mypidStat - oldMypidStat)  
62.                             / (total - oldTotal) * 100));  
63.         }  
64.         reader.close();  
65.     } catch (IOException ex) {  
66.         ex.printStackTrace();  
67.     }  
68. }