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：
05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---MemTotal: 204876 kB 05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---MemFree: 4596 kB 05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Buffers: 16020 kB 05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Cached: 82508 kB 05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---SwapCached: 64 kB 05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Active: 137104 kB 05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Inactive: 41056 kB 05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---SwapTotal: 65528 kB 05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---SwapFree: 65368 kB 05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Dirty: 88 kB 05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Writeback: 0 kB 05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---AnonPages: 79672 kB 05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Mapped: 38296 kB 05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Slab: 5768 kB 05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---SReclaimable: 1856 kB 05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---SUnreclaim: 3912 kB 05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---PageTables: 8184 kB 05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---NFS_Unstable: 0 kB 05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---Bounce: 0 kB 05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---CommitLimit: 167964 kB 05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---Committed_AS: 11771920 kB 05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---VmallocTotal: 761856 kB 05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---VmallocUsed: 83656 kB 05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---VmallocChunk: 674820 kB
第一行是总内存大小(即用户可以使用的ram的大小)！
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; }
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，之前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。
SDcard大小
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; }
注意类型，不然相乘之后会有溢出。
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));
CPU信息
public String[] getCpuInfo() { String str1 = "/proc/cpuinfo"; String str2=""; String[] cpuInfo={"",""}; String[] arrayOfString; try { FileReader fr = new FileReader(str1); BufferedReader localBufferedReader = new BufferedReader(fr, 8192); str2 = localBufferedReader.readLine(); arrayOfString = str2.split("\\s+"); for (int i = 2; i < arrayOfString.length; i++) { cpuInfo[0] = cpuInfo[0] + arrayOfString[i] + " "; } str2 = localBufferedReader.readLine(); arrayOfString = str2.split("\\s+"); cpuInfo[1] += arrayOfString[2]; localBufferedReader.close(); } catch (IOException e) { } return cpuInfo; }
/proc/cpuinfo文件中第一行是CPU的型号，第二行是CPU的频率，可以通过读文件，读取这些数据！
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。
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); }
我是天王盖地虎的分割线
参考：http://gqdy365.iteye.com/blog/1066113
Android -- 系统信息（内存、cpu、sd卡、电量、版本）获取,布布扣,bubuko.com
Android -- 系统信息（内存、cpu、sd卡、电量、版本）获取
原文：http://www.cnblogs.com/yydcdut/p/3851716.html