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：
Java代码
  1. publicvoidgetTotalMemory(){
  2. Stringstr1="/proc/meminfo";
  3. Stringstr2="";
  4. try{
  5. FileReaderfr=newFileReader(str1);
  6. BufferedReaderlocalBufferedReader=newBufferedReader(fr,8192);
  7. while((str2=localBufferedReader.readLine())!=null){
  8. Log.i(TAG,"---"+str2);
  9. }
  10. }catch(IOExceptione){
  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) {}}


运行信息如下：
Java代码
  1. 05-3008:05:14.807:INFO/-SystemInfo-(1519):---MemTotal:204876kB
  2. 05-3008:05:14.807:INFO/-SystemInfo-(1519):---MemFree:4596kB
  3. 05-3008:05:14.807:INFO/-SystemInfo-(1519):---Buffers:16020kB
  4. 05-3008:05:14.807:INFO/-SystemInfo-(1519):---Cached:82508kB
  5. 05-3008:05:14.807:INFO/-SystemInfo-(1519):---SwapCached:64kB
  6. 05-3008:05:14.807:INFO/-SystemInfo-(1519):---Active:137104kB
  7. 05-3008:05:14.807:INFO/-SystemInfo-(1519):---Inactive:41056kB
  8. 05-3008:05:14.807:INFO/-SystemInfo-(1519):---SwapTotal:65528kB
  9. 05-3008:05:14.817:INFO/-SystemInfo-(1519):---SwapFree:65368kB
  10. 05-3008:05:14.817:INFO/-SystemInfo-(1519):---Dirty:88kB
  11. 05-3008:05:14.817:INFO/-SystemInfo-(1519):---Writeback:0kB
  12. 05-3008:05:14.817:INFO/-SystemInfo-(1519):---AnonPages:79672kB
  13. 05-3008:05:14.817:INFO/-SystemInfo-(1519):---Mapped:38296kB
  14. 05-3008:05:14.817:INFO/-SystemInfo-(1519):---Slab:5768kB
  15. 05-3008:05:14.817:INFO/-SystemInfo-(1519):---SReclaimable:1856kB
  16. 05-3008:05:14.827:INFO/-SystemInfo-(1519):---SUnreclaim:3912kB
  17. 05-3008:05:14.827:INFO/-SystemInfo-(1519):---PageTables:8184kB
  18. 05-3008:05:14.827:INFO/-SystemInfo-(1519):---NFS_Unstable:0kB
  19. 05-3008:05:14.827:INFO/-SystemInfo-(1519):---Bounce:0kB
  20. 05-3008:05:14.827:INFO/-SystemInfo-(1519):---CommitLimit:167964kB
  21. 05-3008:05:14.827:INFO/-SystemInfo-(1519):---Committed_AS:11771920kB
  22. 05-3008:05:14.827:INFO/-SystemInfo-(1519):---VmallocTotal:761856kB
  23. 05-3008:05:14.827:INFO/-SystemInfo-(1519):---VmallocUsed:83656kB
  24. 05-3008:05:14.827:INFO/-SystemInfo-(1519):---VmallocChunk:674820kB
05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---MemTotal: 204876 kB05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---MemFree:4596 kB05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Buffers: 16020 kB05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Cached:82508 kB05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---SwapCached: 64 kB05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Active: 137104 kB05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Inactive:41056 kB05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---SwapTotal: 65528 kB05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---SwapFree:65368 kB05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Dirty:88 kB05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Writeback: 0 kB05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---AnonPages: 79672 kB05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Mapped:38296 kB05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Slab: 5768 kB05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---SReclaimable: 1856 kB05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---SUnreclaim: 3912 kB05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---PageTables: 8184 kB05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---NFS_Unstable:0 kB05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---Bounce:0 kB05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---CommitLimit:167964 kB05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---Committed_AS: 11771920 kB05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---VmallocTotal: 761856 kB05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---VmallocUsed: 83656 kB05-30 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)！其他各项的介绍大家可以看这儿：
http://bg135.com/android-phones-to-get-the-total-memory-and-available-memory.html

获取当前剩余内存(ram)大小的方法：
Java代码
  1. publiclonggetAvailMemory(){
  2. ActivityManageram=(ActivityManager)mContext.getSystemService(Context.ACTIVITY_SERVICE);
  3. ActivityManager.MemoryInfomi=newActivityManager.MemoryInfo();
  4. am.getMemoryInfo(mi);
  5. returnmi.availMem;
  6. }
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
Java代码
  1. publiclong[]getRomMemroy(){
  2. long[]romInfo=newlong[2];
  3. //Totalrommemory
  4. romInfo[0]=getTotalInternalMemorySize();
  6. //Availablerommemory
  7. Filepath=Environment.getDataDirectory();
  8. StatFsstat=newStatFs(path.getPath());
  9. longblockSize=stat.getBlockSize();
  10. longavailableBlocks=stat.getAvailableBlocks();
  11. romInfo[1]=blockSize*availableBlocks;
  12. getVersion();
  13. returnromInfo;
  14. }
  16. publiclonggetTotalInternalMemorySize(){
  17. Filepath=Environment.getDataDirectory();
  18. StatFsstat=newStatFs(path.getPath());
  19. longblockSize=stat.getBlockSize();
  20. longtotalBlocks=stat.getBlockCount();
  21. returntotalBlocks*blockSize;
  22. }
public long[] getRomMemroy() {long[] romInfo = new long[2];//Total rom memoryromInfo[0] = getTotalInternalMemorySize();//Available rom memoryFile 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。

三、sdCard大小
Java代码
  1. publiclong[]getSDCardMemory(){
  2. long[]sdCardInfo=newlong[2];
  3. Stringstate=Environment.getExternalStorageState();
  4. if(Environment.MEDIA_MOUNTED.equals(state)){
  5. FilesdcardDir=Environment.getExternalStorageDirectory();
  6. StatFssf=newStatFs(sdcardDir.getPath());
  7. longbSize=sf.getBlockSize();
  8. longbCount=sf.getBlockCount();
  9. longavailBlocks=sf.getAvailableBlocks();
  11. sdCardInfo[0]=bSize*bCount;//总大小
  12. sdCardInfo[1]=bSize*availBlocks;//可用大小
  13. }
  14. returnsdCardInfo;
  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;}

注意类型，不然相乘之后会有溢出。

四、电池电量
Java代码
  1. privateBroadcastReceiverbatteryReceiver=newBroadcastReceiver(){
  2. @Override
  3. publicvoidonReceive(Contextcontext,Intentintent){
  4. intlevel=intent.getIntExtra("level",0);
  5. //level加%就是当前电量了
  6. }
  7. };
private BroadcastReceiver batteryReceiver=new BroadcastReceiver(){@Overridepublic 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
Java代码
  1. registerReceiver(batteryReceiver,newIntentFilter(Intent.ACTION_BATTERY_CHANGED));
registerReceiver(batteryReceiver, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));


五、CPU信息
Java代码
  1. publicString[]getCpuInfo(){
  2. Stringstr1="/proc/cpuinfo";
  3. Stringstr2="";
  4. String[]cpuInfo={"",""};
  5. String[]arrayOfString;
  6. try{
  7. FileReaderfr=newFileReader(str1);
  8. BufferedReaderlocalBufferedReader=newBufferedReader(fr,8192);
  9. str2=localBufferedReader.readLine();
  10. arrayOfString=str2.split("\\s+");
  11. for(inti=2;i<arrayOfString.length;i++){
  12. cpuInfo[0]=cpuInfo[0]+arrayOfString[i]+"";
  13. }
  14. str2=localBufferedReader.readLine();
  15. arrayOfString=str2.split("\\s+");
  16. cpuInfo[1]+=arrayOfString[2];
  17. localBufferedReader.close();
  18. }catch(IOExceptione){
  19. }
  20. returncpuInfo;
  21. }
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！

六、系统的版本信息：
Java代码
  1. publicString[]getVersion(){
  2. String[]version={"null","null","null","null"};
  3. Stringstr1="/proc/version";
  4. Stringstr2;
  5. String[]arrayOfString;
  6. try{
  7. FileReaderlocalFileReader=newFileReader(str1);
  8. BufferedReaderlocalBufferedReader=newBufferedReader(
  9. localFileReader,8192);
  10. str2=localBufferedReader.readLine();
  11. arrayOfString=str2.split("\\s+");
  12. version[0]=arrayOfString[2];//KernelVersion
  13. localBufferedReader.close();
  14. }catch(IOExceptione){
  15. }
  16. version[1]=Build.VERSION.RELEASE;//firmwareversion
  17. version[2]=Build.MODEL;//model
  18. version[3]=Build.DISPLAY;//systemversion
  19. returnversion;
  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];//KernelVersionlocalBufferedReader.close();} catch (IOException e) {}version[1] = Build.VERSION.RELEASE;// firmware versionversion[2]=Build.MODEL;//modelversion[3]=Build.DISPLAY;//system versionreturn version;}

版本信息里面还包括型号等信息。

七、MAC地址和开机时间：
Java代码
  1. publicString[]getOtherInfo(){
  2. String[]other={"null","null"};
  3. WifiManagerwifiManager=(WifiManager)mContext.getSystemService(Context.WIFI_SERVICE);
  4. WifiInfowifiInfo=wifiManager.getConnectionInfo();
  5. if(wifiInfo.getMacAddress()!=null){
  6. other[0]=wifiInfo.getMacAddress();
  7. }else{
  8. other[0]="Fail";
  9. }
  10. other[1]=getTimes();
  11. returnother;
  12. }
  13. privateStringgetTimes(){
  14. longut=SystemClock.elapsedRealtime()/1000;
  15. if(ut==0){
  16. ut=1;
  17. }
  18. intm=(int)((ut/60)%60);
  19. inth=(int)((ut/3600));
  20. returnh+""+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);}


最后贴一个格式化数据的方法：
Java代码
  1. publicStringformatSize(longsize){
  2. Stringsuffix=null;
  3. floatfSize=0;
  5. if(size>=1024){
  6. suffix="KB";
  7. fSize=size/1024;
  8. if(fSize>=1024){
  9. suffix="MB";
  10. fSize/=1024;
  11. }
  12. if(fSize>=1024){
  13. suffix="GB";
  14. fSize/=1024;
  15. }
  16. }else{
  17. fSize=size;
  18. }
  19. java.text.DecimalFormatdf=newjava.text.DecimalFormat("#0.00");
  20. StringBuilderresultBuffer=newStringBuilder(df.format(fSize));
  21. if(suffix!=null)
  22. resultBuffer.append(suffix);
  23. returnresultBuffer.toString();
  24. }
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();}

保留两位小数。

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