Android系统信息（内存、cpu、sd卡、电量、版本）获取

来源：互联网发布：java保留两位小数编辑：程序博客网时间：2024/05/01 10:03

原文

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：

01public voidgetTotalMemory() {   
02        String str1 = "/proc/meminfo";   
03        String str2="";   
04        try{   
05            FileReader fr = newFileReader(str1);   
06            BufferedReader localBufferedReader = newBufferedReader(fr, 8192);   
07            while((str2 = localBufferedReader.readLine()) != null) {   
08                Log.i(TAG, "---"+ str2);   
09            }   
10        } catch(IOException e) {   
11        }   
12    }

运行信息如下：第一行是总内存大小(即用户可以使用的ram的大小)

0111-30 08:05:14.807: INFO/-SystemInfo-(1519): ---MemTotal:       204876kB   
0211-30 08:05:14.807: INFO/-SystemInfo-(1519): ---MemFree:          4596kB   
0311-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Buffers:         16020kB   
0411-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Cached:          82508kB   
0511-30 08:05:14.807: INFO/-SystemInfo-(1519): ---SwapCached:         64kB   
0611-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Active:         137104kB   
0711-30 08:05:14.807: INFO/-SystemInfo-(1519): ---Inactive:        41056kB   
0811-30 08:05:14.807: INFO/-SystemInfo-(1519): ---SwapTotal:       65528kB   
0911-30 08:05:14.817: INFO/-SystemInfo-(1519): ---SwapFree:        65368kB   
1011-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Dirty:              88kB   
1111-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Writeback:           0kB   
1211-30 08:05:14.817: INFO/-SystemInfo-(1519): ---AnonPages:       79672kB   
1311-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Mapped:          38296kB   
1411-30 08:05:14.817: INFO/-SystemInfo-(1519): ---Slab:             5768kB   
1511-30 08:05:14.817: INFO/-SystemInfo-(1519): ---SReclaimable:     1856kB   
1611-30 08:05:14.827: INFO/-SystemInfo-(1519): ---SUnreclaim:       3912kB   
1711-30 08:05:14.827: INFO/-SystemInfo-(1519): ---PageTables:       8184kB   
1811-30 08:05:14.827: INFO/-SystemInfo-(1519): ---NFS_Unstable:        0kB   
1911-30 08:05:14.827: INFO/-SystemInfo-(1519): ---Bounce:              0kB   
2011-30 08:05:14.827: INFO/-SystemInfo-(1519): ---CommitLimit:    167964kB   
2111-30 08:05:14.827: INFO/-SystemInfo-(1519): ---Committed_AS: 11771920kB   
2211-30 08:05:14.827: INFO/-SystemInfo-(1519): ---VmallocTotal:   761856kB   
2311-30 08:05:14.827: INFO/-SystemInfo-(1519): ---VmallocUsed:     83656kB   
2411-30 08:05:14.827: INFO/-SystemInfo-(1519): ---VmallocChunk:   674820 kB

获取当前剩余内存(ram)大小的方法 :

1public longgetAvailMemory() {   
2        ActivityManager am = (ActivityManager)mContext.getSystemService(Context.ACTIVITY_SERVICE);   
3        ActivityManager.MemoryInfo mi = newActivityManager.MemoryInfo();   
4        am.getMemoryInfo(mi);   
5        returnmi.availMem;   
6    }

二、Rom大小

01publiclong[] getRomMemroy() {   
02        long[] romInfo = newlong[2];   
03        //Total rom memory   
04        romInfo[0] = getTotalInternalMemorySize();   
05     
06        //Available rom memory   
07        File path = Environment.getDataDirectory();   
08        StatFs stat = newStatFs(path.getPath());   
09        longblockSize = stat.getBlockSize();   
10        longavailableBlocks = stat.getAvailableBlocks();   
11        romInfo[1] = blockSize * availableBlocks;   
12        getVersion();   
13        returnromInfo;   
14    }   
15     
16    public longgetTotalInternalMemorySize() {   
17        File path = Environment.getDataDirectory();   
18        StatFs stat = newStatFs(path.getPath());   
19        longblockSize = stat.getBlockSize();   
20        longtotalBlocks = stat.getBlockCount();   
21        returntotalBlocks * blockSize;   
22    }

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，

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大小注意类型，不然相乘之后会有溢出。

01publiclong[] getSDCardMemory() {   
02        long[] sdCardInfo=newlong[2];   
03        String state = Environment.getExternalStorageState();   
04        if(Environment.MEDIA_MOUNTED.equals(state)) {   
05            File sdcardDir = Environment.getExternalStorageDirectory();   
06            StatFs sf = newStatFs(sdcardDir.getPath());   
07            longbSize = sf.getBlockSize();   
08            longbCount = sf.getBlockCount();   
09            longavailBlocks = sf.getAvailableBlocks();   
10     
11            sdCardInfo[0] = bSize * bCount;//总大小   
12            sdCardInfo[1] = bSize * availBlocks;//可用大小   
13        }   
14        returnsdCardInfo;   
15    }

四、电池电量

1private BroadcastReceiver batteryReceiver=newBroadcastReceiver(){   
2        @Override   
3        public voidonReceive(Context context, Intent intent) {   
4            intlevel = intent.getIntExtra("level", 0);   
5            //  level加%就是当前电量了   
6    }   
7};

然后在activity的oncreate()方法中注册

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

五、CPU信息 : /proc/cpuinfo文件中第一行是CPU的型号，第二行是CPU的频率

1adb shell                       (connect to your Android device shell) 
2   
3cat /proc/cpuinfo               (read the CPU info)

01privateString getInfo() { 
02   
03    StringBuffer sb = newStringBuffer(); 
04   
05    sb.append("abi: ").append(Build.CPU_ABI).append("\n"); 
06   
07    if (newFile("/proc/cpuinfo").exists()) { 
08   
09        try{ 
10   
11            BufferedReader br = new BufferedReader(new FileReader(newFile("/proc/cpuinfo"))); 
12   
13            String aLine; 
14   
15            while((aLine = br.readLine()) != null) { 
16   
17                sb.append(aLine + "\n"); 
18   
19            } 
20   
21            if(br != null) { 
22   
23                br.close(); 
24   
25            } 
26   
27        } catch(IOException e) { 
28   
29            e.printStackTrace(); 
30   
31        }  
32   
33    } 
34   
35    returnsb.toString(); 
36   
37}

六、系统的版本信息：

01publicString[] getVersion(){   
02    String[] version={"null","null","null","null"};   
03    String str1 = "/proc/version";   
04    String str2;   
05    String[] arrayOfString;   
06    try{   
07        FileReader localFileReader = newFileReader(str1);   
08        BufferedReader localBufferedReader = newBufferedReader(   
09                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    returnversion;   
20}

版本信息里面还包括型号等信息。

七、MAC地址和开机时间：

01publicString[] getOtherInfo(){   
02    String[] other={"null","null"};   
03       WifiManager wifiManager = (WifiManager) mContext.getSystemService(Context.WIFI_SERVICE);   
04       WifiInfo wifiInfo = wifiManager.getConnectionInfo();   
05       if(wifiInfo.getMacAddress()!=null){   
06        other[0]=wifiInfo.getMacAddress();   
07    } else{   
08        other[0] = "Fail";   
09    }   
10    other[1] = getTimes();   
11       returnother;   
12}   
13privateString getTimes() {   
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    return h + " " + mContext.getString(R.string.info_times_hour) + m + " "   
21            + mContext.getString(R.string.info_times_minute);   
22}

最后贴一个格式化数据的方法：保留两位小数。

01public String formatSize(longsize) {   
02    String suffix = null;   
03    floatfSize=0;   
04     
05    if(size >= 1024) {   
06        suffix = "KB";   
07        fSize=size / 1024;   
08        if(fSize >= 1024) {   
09            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 = newjava.text.DecimalFormat("#0.00");   
20    StringBuilder resultBuffer = newStringBuilder(df.format(fSize));   
21    if(suffix != null)   
22        resultBuffer.append(suffix);   
23    returnresultBuffer.toString();   
24}

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