android系統資訊（記憶體、cpu、sd卡、電量、版本）獲取

http://fecbob.pixnet.net/blog/post/35602800-android%E7%B3%BB%E7%B5%B1%E8%B3%87%E8%A8%8A%EF%BC%88%E8%A8%98%E6%86%B6%E9%AB%94%E3%80%81cpu%E3%80%81sd%E5%8D%A1%E3%80%81%E9%9B%BB%E9%87%8F%E3%80%81%E7%89%88

轉自：http://gqdy365.iteye.com/blog/1066113

一、記憶體（ram）：

android的總記憶體大小資訊存放在系統的/proc/meminfo檔裡面，可以通過讀取這個檔來獲取這些資訊：

Java代碼

1.public void getTotalMemory() {

2. String str1 = "/proc/meminfo";

3. String str2="";

4. try {

5. FileReader fr = new FileReader(str1);

6. BufferedReader localBufferedReader = new BufferedReader(fr, 8192);

7. while ((str2 = localBufferedReader.readLine()) != null) {

8. Log.i(TAG, "---" + str2);

9. }

10. } catch (IOException e) {

11. }

12. }

運行資訊如下：

Java代碼

1.05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---MemTotal: 204876 kB

2.05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---MemFree: 4596 kB

3.05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Buffers: 16020 kB

4.05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Cached: 82508 kB

5.05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---SwapCached: 64 kB

6.05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Active: 137104 kB

7.05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Inactive: 41056 kB

8.05-30 08:05:14.807: INFO/-SystemInfo-(1519): ---SwapTotal: 65528 kB

9.05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---SwapFree: 65368 kB

10.05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Dirty: 88 kB

11.05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Writeback: 0 kB

12.05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---AnonPages: 79672 kB

13.05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Mapped: 38296 kB

14.05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Slab: 5768 kB

15.05-30 08:05:14.817: INFO/-SystemInfo-(1519): ---SReclaimable: 1856 kB

16.05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---SUnreclaim: 3912 kB

17.05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---PageTables: 8184 kB

18.05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---NFS_Unstable: 0 kB

19.05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---Bounce: 0 kB

20.05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---CommitLimit: 167964 kB

21.05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---Committed_AS: 11771920 kB

22.05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---VmallocTotal: 761856 kB

23.05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---VmallocUsed: 83656 kB

24.05-30 08:05:14.827: INFO/-SystemInfo-(1519): ---VmallocChunk: 674820 kB

第一行是總記憶體大小(即使用者可以使用的ram的大小)！其他各項的介紹大家可以看這兒：

http://bg135.com/android-phones-to-get-the-total-memory-and-available-memory.html

獲取當前剩餘記憶體(ram)大小的方法：

Java代碼

1.public long getAvailMemory() {

2. ActivityManager am = (ActivityManager)mContext.getSystemService(Context.ACTIVITY_SERVICE);

3. ActivityManager.MemoryInfo mi = new ActivityManager.MemoryInfo();

4. am.getMemoryInfo(mi);

5. return mi.availMem;

6. }

二、Rom大小

Java代碼

1.public long[] getRomMemroy() {

2. long[] romInfo = new long[2];

3. //Total rom memory

4. romInfo[0] = getTotalInternalMemorySize();

5.

6. //Available rom memory

7. File path = Environment.getDataDirectory();

8. StatFs stat = new StatFs(path.getPath());

9. long blockSize = stat.getBlockSize();

10. long availableBlocks = stat.getAvailableBlocks();

11. romInfo[1] = blockSize * availableBlocks;

12. getVersion();

13. return romInfo;

14. }

15.

16. public long getTotalInternalMemorySize() {

17. File path = Environment.getDataDirectory();

18. StatFs stat = new StatFs(path.getPath());

19. long blockSize = stat.getBlockSize();

20. long totalBlocks = stat.getBlockCount();

21. return totalBlocks * blockSize;

22. }

注意類型，不然相乘之後會有溢出。可用內部存儲的大小不能通過getRootDirectory();

取得，之前網上傳的很多都是用getRootDirectory()取得的，我測試之後發現取得的數值不對。要根據getDataDirectory();

取得。

三、sdCard大小

Java代碼

1.public long[] getSDCardMemory() {

2. long[] sdCardInfo=new long[2];

3. String state = Environment.getExternalStorageState();

4. if (Environment.MEDIA_MOUNTED.equals(state)) {

5. File sdcardDir = Environment.getExternalStorageDirectory();

6. StatFs sf = new StatFs(sdcardDir.getPath());

7. long bSize = sf.getBlockSize();

8. long bCount = sf.getBlockCount();

9. long availBlocks = sf.getAvailableBlocks();

10.

11. sdCardInfo[0] = bSize * bCount;//總大小

12. sdCardInfo[1] = bSize * availBlocks;//可用大小

13. }

14. return sdCardInfo;

15. }

注意類型，不然相乘之後會有溢出。

四、電池電量

Java代碼

1.private BroadcastReceiver batteryReceiver=new BroadcastReceiver(){

2. @Override

3. public void onReceive(Context context, Intent intent) {

4. int level = intent.getIntExtra("level", 0);

5. // level加%就是當前電量了

6. }

7. };

然後在activity的oncreate()方法中註冊

Java代碼

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

五、CPU資訊

Java代碼

1.public String[] getCpuInfo() {

2. String str1 = "/proc/cpuinfo";

3. String str2="";

4. String[] cpuInfo={"",""};

5. String[] arrayOfString;

6. try {

7. FileReader fr = new FileReader(str1);

8. BufferedReader localBufferedReader = new BufferedReader(fr, 8192);

9. str2 = localBufferedReader.readLine();

10. arrayOfString = str2.split("\\s+");

11. for (int i = 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 (IOException e) {

19. }

20. return cpuInfo;

21.}

/proc/cpuinfo檔中第一行是CPU的型號，第二行是CPU的頻率，可以通過讀檔，讀取這些資料！

六、系統的版本資訊：

Java代碼

1.public String[] getVersion(){

2. String[] version={"null","null","null","null"};

3. String str1 = "/proc/version";

4. String str2;

5. String[] arrayOfString;

6. try {

7. FileReader localFileReader = new FileReader(str1);

8. BufferedReader localBufferedReader = new BufferedReader(

9. localFileReader, 8192);

10. str2 = localBufferedReader.readLine();

11. arrayOfString = str2.split("\\s+");

12. version[0]=arrayOfString[2];//KernelVersion

13. localBufferedReader.close();

14. } catch (IOException e) {

15. }

16. version[1] = Build.VERSION.RELEASE;// firmware version

17. version[2]=Build.MODEL;//model

18. version[3]=Build.DISPLAY;//system version

19. return version;

20.}

版本資訊裡面還包括型號等資訊。

七、MAC位址和開機時間：

Java代碼

1.public String[] getOtherInfo(){

2. String[] other={"null","null"};

3. WifiManager wifiManager = (WifiManager) mContext.getSystemService(Context.WIFI_SERVICE);

4. WifiInfo wifiInfo = wifiManager.getConnectionInfo();

5. if(wifiInfo.getMacAddress()!=null){

6. other[0]=wifiInfo.getMacAddress();

7. } else {

8. other[0] = "Fail";

9. }

10. other[1] = getTimes();

11. return other;

12.}

13.private String getTimes() {

14. long ut = SystemClock.elapsedRealtime() / 1000;

15. if (ut == 0) {

16. ut = 1;

17. }

18. int m = (int) ((ut / 60) % 60);

19. int h = (int) ((ut / 3600));

20. return h + " " + mContext.getString(R.string.info_times_hour) + m + " "

21. + mContext.getString(R.string.info_times_minute);

22.}

最後貼一個格式化資料的方法：

Java代碼

1.public String formatSize(long size) {

2. String suffix = null;

3. float fSize=0;

4.

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.DecimalFormat df = new java.text.DecimalFormat("#0.00");

20. StringBuilder resultBuffer = new StringBuilder(df.format(fSize));

21. if (suffix != null)

22. resultBuffer.append(suffix);

23. return resultBuffer.toString();

24.}

保留兩位小數。