android系统信息(内存、cpu、sd卡、电量、版本)获取

要转载请注明出处：https://www.360docs.net/doc/2c9957868.html,/blog/1066113，有很多转载了文章不写出处，还写的是什么小编最近做项目碰到什么问题怎么解决的的然后把文章贴下面，俨然一副他们自己的文章，不知羞耻！

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

1public void getTotalMemory(){

2String str1="/proc/meminfo";

3String str2="";

4try{

5FileReader fr=new FileReader(str1);

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

7while((str2=

localBufferedReader.readLine())!=null){

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

9}

10}catch(IOException e){

11}

12}

运行信息如下：

Java代码

1305-3008:05:14.807:INFO/-SystemInfo-(1519):

---MemTotal:204876kB

1405-3008:05:14.807:INFO/-SystemInfo-(1519):---MemFree: 4596kB

1505-3008:05:14.807:INFO/-SystemInfo-(1519):---Buffers: 16020kB

1605-3008:05:14.807:INFO/-SystemInfo-(1519):---Cached: 82508kB

1705-3008:05:14.807:INFO/-SystemInfo-(1519):

---SwapCached:64kB

1805-3008:05:14.807:INFO/-SystemInfo-(1519):---Active: 137104kB

1905-3008:05:14.807:INFO/-SystemInfo-(1519):

---Inactive:41056kB

2005-3008:05:14.807:INFO/-SystemInfo-(1519):

---SwapTotal:65528kB

2105-3008:05:14.817:INFO/-SystemInfo-(1519):

---SwapFree:65368kB

2205-3008:05:14.817:INFO/-SystemInfo-(1519):---Dirty: 88kB

2305-3008:05:14.817:INFO/-SystemInfo-(1519):

---Writeback:0kB

2405-3008:05:14.817:INFO/-SystemInfo-(1519):

---AnonPages:79672kB

2505-3008:05:14.817:INFO/-SystemInfo-(1519):---Mapped: 38296kB

2605-3008:05:14.817:INFO/-SystemInfo-(1519):---Slab: 5768kB

2705-3008:05:14.817:INFO/-SystemInfo-(1519):

---SReclaimable:1856kB

2805-3008:05:14.827:INFO/-SystemInfo-(1519):

---SUnreclaim:3912kB

2905-3008:05:14.827:INFO/-SystemInfo-(1519):

---PageTables:8184kB

3005-3008:05:14.827:INFO/-SystemInfo-(1519):

---NFS_Unstable:0kB

3105-3008:05:14.827:INFO/-SystemInfo-(1519):---Bounce: 0kB

3205-3008:05:14.827:INFO/-SystemInfo-(1519):

---CommitLimit:167964kB

3305-3008:05:14.827:INFO/-SystemInfo-(1519):

---Committed_AS:11771920kB

3405-3008:05:14.827:INFO/-SystemInfo-(1519):

---VmallocTotal:761856kB

3505-3008:05:14.827:INFO/-SystemInfo-(1519):

---VmallocUsed:83656kB

3605-3008:05:14.827:INFO/-SystemInfo-(1519):

---VmallocChunk:674820kB

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：

https://www.360docs.net/doc/2c9957868.html,/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

37public long getAvailMemory(){

38ActivityManager am=

(ActivityManager)mContext.getSystemService(Context.ACTIV ITY_SERVICE);

39ActivityManager.MemoryInfo mi=new

ActivityManager.MemoryInfo();

40am.getMemoryInfo(mi);

41return mi.availMem;

42}

二、Rom大小

Java代码

43public long[]getRomMemroy(){

44long[]romInfo=new long[2];

45//Total rom memory

46romInfo[0]=getTotalInternalMemorySize();

47

48//Available rom memory

49File path=Environment.getDataDirectory();

50StatFs stat=new StatFs(path.getPath());

51long blockSize=stat.getBlockSize();

52long availableBlocks=

stat.getAvailableBlocks();

53romInfo[1]=blockSize*availableBlocks;

54getVersion();

55return romInfo;

56}

57

58public long getTotalInternalMemorySize(){

59File path=Environment.getDataDirectory();

60StatFs stat=new StatFs(path.getPath());

61long blockSize=stat.getBlockSize();

62long totalBlocks=stat.getBlockCount();

63return totalBlocks*blockSize;

64}

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

65public long[]getSDCardMemory(){

66long[]sdCardInfo=new long[2];

67String state=

Environment.getExternalStorageState();

68if(Environment.MEDIA_MOUNTED.equals(state)){ 69File sdcardDir=

Environment.getExternalStorageDirectory();

70StatFs sf=new StatFs(sdcardDir.getPath());

71long bSize=sf.getBlockSize();

72long bCount=sf.getBlockCount();

73long availBlocks=sf.getAvailableBlocks();

74

75sdCardInfo[0]=bSize*bCount;//总大小76sdCardInfo[1]=bSize*availBlocks;//可用大小

77}

78return sdCardInfo;

79}

注意类型，不然相乘之后会有溢出。

四、电池电量

Java代码

80private BroadcastReceiver batteryReceiver=new

BroadcastReceiver(){

81@Override

82public void onReceive(Context context,Intent intent){

83int level=intent.getIntExtra("level",0);

84//level加%就是当前电量了

85}

86};

然后在activity的oncreate()方法中注册

Java代码

87registerReceiver(batteryReceiver,new

IntentFilter(Intent.ACTION_BATTERY_CHANGED));

五、CPU信息

Java代码

88public String[]getCpuInfo(){

89String str1="/proc/cpuinfo";

90String str2="";

91String[]cpuInfo={"",""};

92String[]arrayOfString;

93try{

94FileReader fr=new FileReader(str1);

95BufferedReader localBufferedReader=new

BufferedReader(fr,8192);

96str2=localBufferedReader.readLine();

97arrayOfString=str2.split("\\s+");

98for(int i=2;i

100}

101str2=localBufferedReader.readLine();

102arrayOfString=str2.split("\\s+");

103cpuInfo[1]+=arrayOfString[2];

104localBufferedReader.close();

105}catch(IOException e){

106}

107return cpuInfo;

108}

/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

109public String[]getVersion(){

110String[]version={"null","null","null","null"};

111String str1="/proc/version";

112String str2;

113String[]arrayOfString;

114try{

115FileReader localFileReader=new

FileReader(str1);

116BufferedReader localBufferedReader=new BufferedReader(

117localFileReader,8192);

118str2=localBufferedReader.readLine();

119arrayOfString=str2.split("\\s+");

120version[0]=arrayOfString[2];//KernelVersion 121localBufferedReader.close();

122}catch(IOException e){

123}

124version[1]=Build.VERSION.RELEASE;//firmware version

125version[2]=Build.MODEL;//model

126version[3]=Build.DISPLAY;//system version 127return version;

128}

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

129public String[]getOtherInfo(){

130String[]other={"null","null"};

131WifiManager wifiManager=(WifiManager) mContext.getSystemService(Context.WIFI_SERVICE);

132WifiInfo wifiInfo=

wifiManager.getConnectionInfo();

133if(wifiInfo.getMacAddress()!=null){

134other[0]=wifiInfo.getMacAddress();

135}else{

136other[0]="Fail";

137}

138other[1]=getTimes();

139return other;

140}

141private String getTimes(){

142long ut=SystemClock.elapsedRealtime()/1000;

143if(ut==0){

144ut=1;

145}

146int m=(int)((ut/60)%60);

147int h=(int)((ut/3600));

148return h+""+

mContext.getString(https://www.360docs.net/doc/2c9957868.html,_times_hour)+m+""

149+

mContext.getString(https://www.360docs.net/doc/2c9957868.html,_times_minute);

150}

最后贴一个格式化数据的方法：

Java代码

151public String formatSize(long size){

152String suffix=null;

153float fSize=0;

154

155if(size>=1024){

156suffix="KB";

157fSize=size/1024;

158if(fSize>=1024){

159suffix="MB";

160fSize/=1024;

161}

162if(fSize>=1024){

163suffix="GB";

164fSize/=1024;

165}

166}else{

167fSize=size;

168}

169java.text.DecimalFormat df=new java.text.DecimalFormat("#0.00");

170StringBuilder resultBuffer=new StringBuilder(df.format(fSize));

171if(suffix!=null)

172resultBuffer.append(suffix); 173return resultBuffer.toString(); 174}

保留两位小数。