Android系统信息（内存、cpu、sd卡、电量、版本）获取

jopen 10年前

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) {                  }              }
</div> </div> 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
</div> </div> 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;              }
</div> </div>

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;          }
</div> </div> 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);          }
</div> </div> 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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