转自http://gqdy365.iteye.com/blog/1066113，

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：

publicvoidgetTotalMemory(){

1. Stringstr1="/proc/meminfo";
2. Stringstr2="";
3. try{
4. FileReaderfr=newFileReader(str1);
5. BufferedReaderlocalBufferedReader=newBufferedReader(fr,8192);
6. while((str2=localBufferedReader.readLine())!=null){
7. Log.i(TAG,"---"+str2);
8. }
9. }catch(IOExceptione){
10. }
11. }

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：
05-3008:05:14.807:INFO/-SystemInfo-(1519):---MemTotal:204876kB

1. 05-3008:05:14.807:INFO/-SystemInfo-(1519):---MemFree:4596kB
2. 05-3008:05:14.807:INFO/-SystemInfo-(1519):---Buffers:16020kB
3. 05-3008:05:14.807:INFO/-SystemInfo-(1519):---Cached:82508kB
4. 05-3008:05:14.807:INFO/-SystemInfo-(1519):---SwapCached:64kB
5. 05-3008:05:14.807:INFO/-SystemInfo-(1519):---Active:137104kB
6. 05-3008:05:14.807:INFO/-SystemInfo-(1519):---Inactive:41056kB
7. 05-3008:05:14.807:INFO/-SystemInfo-(1519):---SwapTotal:65528kB
8. 05-3008:05:14.817:INFO/-SystemInfo-(1519):---SwapFree:65368kB
9. 05-3008:05:14.817:INFO/-SystemInfo-(1519):---Dirty:88kB
10. 05-3008:05:14.817:INFO/-SystemInfo-(1519):---Writeback:0kB
11. 05-3008:05:14.817:INFO/-SystemInfo-(1519):---AnonPages:79672kB
12. 05-3008:05:14.817:INFO/-SystemInfo-(1519):---Mapped:38296kB
13. 05-3008:05:14.817:INFO/-SystemInfo-(1519):---Slab:5768kB
14. 05-3008:05:14.817:INFO/-SystemInfo-(1519):---SReclaimable:1856kB
15. 05-3008:05:14.827:INFO/-SystemInfo-(1519):---SUnreclaim:3912kB
16. 05-3008:05:14.827:INFO/-SystemInfo-(1519):---PageTables:8184kB
17. 05-3008:05:14.827:INFO/-SystemInfo-(1519):---NFS_Unstable:0kB
18. 05-3008:05:14.827:INFO/-SystemInfo-(1519):---Bounce:0kB
19. 05-3008:05:14.827:INFO/-SystemInfo-(1519):---CommitLimit:167964kB
20. 05-3008:05:14.827:INFO/-SystemInfo-(1519):---Committed_AS:11771920kB
21. 05-3008:05:14.827:INFO/-SystemInfo-(1519):---VmallocTotal:761856kB
22. 05-3008:05:14.827:INFO/-SystemInfo-(1519):---VmallocUsed:83656kB
23. 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：
publiclonggetAvailMemory(){

1. ActivityManageram=(ActivityManager)mContext.getSystemService(Context.ACTIVITY_SERVICE);
2. ActivityManager.MemoryInfomi=newActivityManager.MemoryInfo();
3. am.getMemoryInfo(mi);
4. returnmi.availMem;
5. }

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
publiclong[]getRomMemroy(){

1. long[]romInfo=newlong[2];
2. //Totalrommemory
3. romInfo[0]=getTotalInternalMemorySize();
5. //Availablerommemory
6. Filepath=Environment.getDataDirectory();
7. StatFsstat=newStatFs(path.getPath());
8. longblockSize=stat.getBlockSize();
9. longavailableBlocks=stat.getAvailableBlocks();
10. romInfo[1]=blockSize*availableBlocks;
11. getVersion();
12. returnromInfo;
13. }
15. publiclonggetTotalInternalMemorySize(){
16. Filepath=Environment.getDataDirectory();
17. StatFsstat=newStatFs(path.getPath());
18. longblockSize=stat.getBlockSize();
19. longtotalBlocks=stat.getBlockCount();
20. returntotalBlocks*blockSize;
21. }

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
publiclong[]getSDCardMemory(){

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

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
privateBroadcastReceiverbatteryReceiver=newBroadcastReceiver(){

1. @Override
2. publicvoidonReceive(Contextcontext,Intentintent){
3. intlevel=intent.getIntExtra("level",0);
4. //level加%就是当前电量了
5. }
6. };

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
registerReceiver(batteryReceiver,newIntentFilter(Intent.ACTION_BATTERY_CHANGED));

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

五、CPU信息
publicString[]getCpuInfo(){

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

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：
publicString[]getVersion(){

1. String[]version={"null","null","null","null"};
2. Stringstr1="/proc/version";
3. Stringstr2;
4. String[]arrayOfString;
5. try{
6. FileReaderlocalFileReader=newFileReader(str1);
7. BufferedReaderlocalBufferedReader=newBufferedReader(
8. localFileReader,8192);
9. str2=localBufferedReader.readLine();
10. arrayOfString=str2.split("\\s+");
11. version[0]=arrayOfString[2];//KernelVersion
12. localBufferedReader.close();
13. }catch(IOExceptione){
14. }
15. version[1]=Build.VERSION.RELEASE;//firmwareversion
16. version[2]=Build.MODEL;//model
17. version[3]=Build.DISPLAY;//systemversion
18. returnversion;
19. }

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 publicString[]getOtherInfo(){

1. String[]other={"null","null"};
2. WifiManagerwifiManager=(WifiManager)mContext.getSystemService(Context.WIFI_SERVICE);
3. WifiInfowifiInfo=wifiManager.getConnectionInfo();
4. if(wifiInfo.getMacAddress()!=null){
5. other[0]=wifiInfo.getMacAddress();
6. }else{
7. other[0]="Fail";
8. }
9. other[1]=getTimes();
10. returnother;
11. }
12. privateStringgetTimes(){
13. longut=SystemClock.elapsedRealtime()/1000;
14. if(ut==0){
15. ut=1;
16. }
17. intm=(int)((ut/60)%60);
18. inth=(int)((ut/3600));
19. returnh+""+mContext.getString(R.string.info_times_hour)+m+""
20. +mContext.getString(R.string.info_times_minute);
21. }

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 publicStringformatSize(longsize){

1. Stringsuffix=null;
2. floatfSize=0;
4. if(size>=1024){
5. suffix="KB";
6. fSize=size/1024;
7. if(fSize>=1024){
8. suffix="MB";
9. fSize/=1024;
10. }
11. if(fSize>=1024){
12. suffix="GB";
13. fSize/=1024;
14. }
15. }else{
16. fSize=size;
17. }
18. java.text.DecimalFormatdf=newjava.text.DecimalFormat("#0.00");
19. StringBuilderresultBuffer=newStringBuilder(df.format(fSize));
20. if(suffix!=null)
21. resultBuffer.append(suffix);
22. returnresultBuffer.toString();
23. }

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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