Android 系统信息的获取
一、内存（ram）：
1、android 的内存大小信息存放在系统的 /proc/meminfo 文件里面，通过adb shell 进入 手机目录后，使用 cat /proc/meminfo 可以显示这些信息：
root@m7:/ # cat /proc/meminfo MemTotal: 1863064 kB MemFree: 109396 kB Buffers: 30892 kB Cached: 835468 kB SwapCached: 0 kB Active: 855868 kB Inactive: 593304 kB Active(anon): 424552 kB Inactive(anon): 162992 kB Active(file): 431316 kB Inactive(file): 430312 kB Unevictable: 2268 kB Mlocked: 0 kB HighTotal: 1458172 kB HighFree: 35356 kB LowTotal: 404892 kB LowFree: 74040 kB SwapTotal: 419428 kB SwapFree: 412148 kB Dirty: 60 kB Writeback: 0 kB AnonPages: 585116 kB Mapped: 272388 kB Shmem: 2460 kB Slab: 52480 kB SReclaimable: 23556 kB SUnreclaim: 28924 kB KernelStack: 14736 kB PageTables: 35532 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 1350960 kB Committed_AS: 82837660 kB VmallocTotal: 409600 kB VmallocUsed: 181572 kB VmallocIoRemap: 172600 kB VmallocAlloc: 8376 kB VmallocMap: 0 kB VmallocUserMap: 0 kB VmallocVpage: 4888 kB VmallocChunk: 69636 kB KGSL_ALLOC: 34340 kB ION_ALLOC: 105376 kB Kmalloc: 8112 kB DMA ALLOC: 352 kB CachedUnmapped: 578420 kB KgslUnmapped: 19528 kB Ftrace: 32768 kB
2、在代码中可以通过读取 /proc/meminfo 文件来获取相应的信息：
public void getTotalRamMemory() { 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) { } }
3、也可以通过 ActivityManager.MemoryInfo 来获取相应的信息：
public long getAvailRamMemory(Context context) { ActivityManager am = (ActivityManager) context .getSystemService(Context.ACTIVITY_SERVICE); ActivityManager.MemoryInfo mi = new ActivityManager.MemoryInfo(); am.getMemoryInfo(mi); return mi.availMem; }
二、机身容量（Rom大小）
1、android 机身容量，通过adb shell 进入 手机目录后，使用 df 命令可以显示手机挂载分区详细信息：
root@m7:/ # df
Filesystem Size Used Free Blksize
/dev 909.7M 68.0K 909.6M 4096
/sys/fs/cgroup 909.7M 12.0K 909.7M 4096
/mnt/asec 909.7M 0.0K 909.7M 4096
/mnt/obb 909.7M 0.0K 909.7M 4096
/system 1763.8M 1589.9M 174.0M 4096
/data 26206.2M 3082.8M 23123.4M 4096
/cache 629.9M 10.5M 619.4M 4096
/devlog 19.7M 15.8M 3.9M 4096
/carrier 24.6M 4.0M 20.6M 4096
/firmware/mdm 86.0M 69.1M 16.8M 16384
/data/qcks 20.0M 9.0M 11.0M 4096
/data/efs 20.0M 0.0K 20.0M 4096
/firmware/q6 199.8M 6.4M 193.3M 4096
/data/secure/data 909.7M 0.0K 909.7M 4096
/mnt/shell/emulated 26106.2M 3082.8M 23023.4M 4096
/sqlite_stmt_journals 512.0K 0.0K 512.0K 4096
2、在代码中可以通过 df 命令来显示机身容量，这个方法也适用与获取sdCard的大小：
/** * get "/data" block available size. * * @return available size(kB). */ public static long getDataAvailable() { // exec cmd "df" & get column as: Filesystem Size Used Free Blksize; // the 3th column of /data is dataFreeSize. String dataFreeSizeDetailInfo = getDeviceSystemInfo("df", "/data ", 3) .trim(); // remove the last char of the dataFreeSizeDetailInfo String dataFreeSizeShotInfo = dataFreeSizeDetailInfo.substring(0, dataFreeSizeDetailInfo.length() - 1); float dataFreeSize = Float.parseFloat(dataFreeSizeShotInfo); float dataFreeKB = dataFreeSize; if (dataFreeSizeDetailInfo.endsWith("G")// GB to kB || dataFreeSizeDetailInfo.endsWith("g")) { dataFreeKB = dataFreeSize * (1024 * 1024); } else if (dataFreeSizeDetailInfo.endsWith("M")// MB to kB || dataFreeSizeDetailInfo.endsWith("m")) { dataFreeKB = dataFreeSize * 1024; } else {// kB to kB } return (long) dataFreeKB; } /** * get device system info by executing shell command. * * @param cmd * command to execute by using device shell. * @param target * target line or some special line that contain the target * string ,such as "/data" * @param column * ={0,1,2,3,...} * @return */ public static String getDeviceSystemInfo(String cmd, String target, int column) { String result = ""; result = RootCmd.execShellCmd(cmd); String[] strs = result.split(" "); String info = "-1"; for (String str : strs) { if (str.startsWith(target) && str.contains(target)) { Pattern p = Pattern.compile("\s+"); Matcher m = p.matcher(str); str = m.replaceAll(" "); String[] subStr = str.split(" "); if (subStr.length < column) { return null; } String columnInfo = subStr[column]; info = columnInfo; } } return info; }
3、也可以通过 StatFs 来获取机身容量：
/** * * 获得机身内存大小 * * ＠return */ public long getRomTotalSize() { File path = Environment.getDataDirectory(); StatFs statFs = new StatFs(path.getPath()); long blockSize = statFs.getBlockSizeLong(); long tatalBlocks = statFs.getBlockCountLong(); return blockSize * tatalBlocks; } /** * 获得机身可用内存 * * ＠return */ private long getRomAvailableSize() { File path = Environment.getDataDirectory(); StatFs statFs = new StatFs(path.getPath()); long blockSize = statFs.getBlockSizeLong(); long availableBlocks = statFs.getAvailableBlocksLong(); return blockSize * availableBlocks; }
三、sdCard大小
/** * * 获得sd卡总共容量 * * ＠return */ public long getSDTotalSize() { /* 获取存储卡路径 */ File sdcardDir = Environment.getExternalStorageDirectory(); /* StatFs 看文件体系空间应用景象 */ StatFs statFs = new StatFs(sdcardDir.getPath()); long blockSize = statFs.getBlockSizeLong(); long totalSize = statFs.getBlockCountLong(); return blockSize * totalSize; } /** * * 获得sd卡残剩容量，即可以大小 * * ＠return */ public long getSdAvaliableSize() { File path = Environment.getExternalStorageDirectory(); StatFs statFs = new StatFs(path.getPath()); long blockSize = statFs.getBlockSizeLong(); long availableBlocks = statFs.getAvailableBlocksLong(); return blockSize * availableBlocks; }
四、取得的rom容量和sdcard容量时，常常需要将数据格式化，转换成KB,MB,GB,下面是一个格式化数据的方法： 保留两位小数。
/** * convert size to KB or MB or GB * * @param size * @return */ protected String formatSize(long originSize) { String suffix = null; float fSize = 0; if (originSize >= 1024) { suffix = "KB"; fSize = originSize / 1024; if (fSize >= 1024) { suffix = "MB"; fSize /= 1024; } if (fSize >= 1024) { suffix = "GB"; fSize /= 1024; } } else { fSize = originSize; } 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(); }
五、CPU信息
1、通过adb shell 进入 手机目录后，使用 cat /proc/cpuinfo 可以显示 CPU 详细信息，/proc/cpuinfo文件中第一行是CPU的型号，第二行是CPU的频率
root@m7:/ # cat /proc/cpuinfo Processor : ARMv7 Processor rev 0 (v7l) processor : 0 BogoMIPS : 13.52 processor : 1 BogoMIPS : 13.52 processor : 2 BogoMIPS : 13.52 processor : 3 BogoMIPS : 13.52 Features : swp half thumb fastmult vfp edsp thumbee neon vfpv3 tls vfpv4 CPU implementer : 0x51 CPU architecture: 7 CPU variant : 0x1 CPU part : 0x06f CPU revision : 0 Hardware : UNKNOWN Revision : 0002 Serial : 0000000000000000
2、在代码中可以通过读取 /proc/cpuinfo 文件来获取CPU相应的信息：
/** * get CPU info * * @return */ private String getCPUInfo() { StringBuffer sb = new StringBuffer(); sb.append("abi: ").append(Build.CPU_ABI).append(" "); 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 + " "); } if (br != null) { br.close(); } } catch (IOException e) { e.printStackTrace(); } } return sb.toString(); }
六、系统的版本信息：
/** * get system version * * @return */ 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; }
七、MAC地址：
/** * * @return */ public String getMacInfo(Context context) { String macInfo; WifiManager wifiManager = (WifiManager) context .getSystemService(Context.WIFI_SERVICE); WifiInfo wifiInfo = wifiManager.getConnectionInfo(); if (wifiInfo.getMacAddress() != null) { macInfo = wifiInfo.getMacAddress(); } else { macInfo = "Fail"; } return macInfo; }
八、电池电量：
/** * register battery broadcast receiver * * @param context */ public void registerBatteryReceiver(Context context) { IntentFilter filter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED); context.registerReceiver(batteryReceiver, filter, null, null); } /** * unregister battery broadcast receiver * * @param context */ public void unregisterBatteryReceiver(Context context) { context.unregisterReceiver(batteryReceiver); } 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 System.out.print("Current battery level:" + level); } };
九、开机时间：
/** * * @return */ private String getStartTimes(Context context) { long ut = SystemClock.elapsedRealtime() / 1000; if (ut == 0) { ut = 1; } int m = (int) ((ut / 60) % 60); int h = (int) ((ut / 3600)); return h + " hours," + m + " minutes."; }