Android系统信息（内存、cpu、sd卡、电量、版本）获取

一、内存（ram）：

android的总内存大小信息存放在系统的/proc/meminfo文件里面，可以通过读取这个文件来获取这些信息：

    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) {              }          }

运行信息如下：第一行是总内存大小(即用户可以使用的ram的大小)

11-30 08:05:14.807: INFO/-SystemInfo-(1519): ---MemTotal:       204876 kB  11-30 08:05:14.807: INFO/-SystemInfo-(1519): ---MemFree:          4596 kB  11-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Buffers:         16020 kB  11-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Cached:          82508 kB  11-30 08:05:14.807: INFO/-SystemInfo-(1519): ---SwapCached:         64 kB  11-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Active:         137104 kB  11-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Inactive:        41056 kB  11-30 08:05:14.807: INFO/-SystemInfo-(1519): ---SwapTotal:       65528 kB  11-30 08:05:14.817: INFO/-SystemInfo-(1519): ---SwapFree:        65368 kB  11-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Dirty:              88 kB  11-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Writeback:           0 kB  11-30 08:05:14.817: INFO/-SystemInfo-(1519): ---AnonPages:       79672 kB  11-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Mapped:          38296 kB  11-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Slab:             5768 kB  11-30 08:05:14.817: INFO/-SystemInfo-(1519): ---SReclaimable:     1856 kB  11-30 08:05:14.827: INFO/-SystemInfo-(1519): ---SUnreclaim:       3912 kB  11-30 08:05:14.827: INFO/-SystemInfo-(1519): ---PageTables:       8184 kB  11-30 08:05:14.827: INFO/-SystemInfo-(1519): ---NFS_Unstable:        0 kB  11-30 08:05:14.827: INFO/-SystemInfo-(1519): ---Bounce:              0 kB  11-30 08:05:14.827: INFO/-SystemInfo-(1519): ---CommitLimit:    167964 kB  11-30 08:05:14.827: INFO/-SystemInfo-(1519): ---Committed_AS: 11771920 kB  11-30 08:05:14.827: INFO/-SystemInfo-(1519): ---VmallocTotal:   761856 kB  11-30 08:05:14.827: INFO/-SystemInfo-(1519): ---VmallocUsed:     83656 kB  11-30 08:05:14.827: INFO/-SystemInfo-(1519): ---VmallocChunk:   674820 kB

获取当前剩余内存(ram)大小的方法 :

    public long getAvailMemory() {              ActivityManager am = (ActivityManager)mContext.getSystemService(Context.ACTIVITY_SERVICE);              ActivityManager.MemoryInfo mi = new ActivityManager.MemoryInfo();              am.getMemoryInfo(mi);              return mi.availMem;          }

二、Rom大小

    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;          }

注意类型，不然相乘之后会有溢出。可用内部存储的大小不能通过getRootDirectory();取得，

网上传的很多都是用getRootDirectory()取得的，我测试之后发现取得的数值不对。要根据getDataDirectory();取得。

三、sdCard大小注意类型，不然相乘之后会有溢出。

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;      }

四、电池电量

private BroadcastReceiver batteryReceiver=new BroadcastReceiver(){          @Override          public void onReceive(Context context, Intent intent) {              int level = intent.getIntExtra("level", 0);              //  level加%就是当前电量了      }  };

然后在activity的oncreate()方法中注册

registerReceiver(batteryReceiver, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));

五、CPU信息 : /proc/cpuinfo文件中第一行是CPU的型号，第二行是CPU的频率

    adb shell                       (connect to your Android device shell)    cat /proc/cpuinfo               (read the CPU info)

private String getInfo() {    StringBuffer sb = new StringBuffer();    sb.append("abi: ").append(Build.CPU_ABI).append("\n");    if (new File("/proc/cpuinfo").exists()) {        try {            BufferedReader br = new BufferedReader(new FileReader(new File("/proc/cpuinfo")));            String aLine;            while ((aLine = br.readLine()) != null) {                sb.append(aLine + "\n");            }            if (br != null) {                br.close();            }        } catch (IOException e) {            e.printStackTrace();        }     }    return sb.toString();}

六、系统的版本信息：

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;  }

版本信息里面还包括型号等信息。

七、MAC地址和开机时间：

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);  }

最后贴一个格式化数据的方法：保留两位小数。

    public String formatSize(long size) {          String suffix = null;          float fSize=0;                if (size >= 1024) {              suffix = "KB";              fSize=size / 1024;              if (fSize >= 1024) {                  suffix = "MB";                  fSize /= 1024;              }              if (fSize >= 1024) {                  suffix = "GB";                  fSize /= 1024;              }          } else {              fSize = size;          }          java.text.DecimalFormat df = new java.text.DecimalFormat("#0.00");          StringBuilder resultBuffer = new StringBuilder(df.format(fSize));          if (suffix != null)              resultBuffer.append(suffix);          return resultBuffer.toString();      }

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