Android obtains information about the CPU, memory, version, and power of the system.

1. CPU frequency, CPU information:/proc/cpuinfo and/proc/STAT
By reading the file/proc/cpuinfo system CPU type and other information. Read/proc/STAT all CPU activity information to calculate CPU usage. Here we will talk about how to obtain the CPU frequency through code:
Package com. Orange. CPU;
 
Import java. Io. bufferedreader;
Import java. Io. filenotfoundexception;
Import java. Io. filereader;
Import java. Io. ioexception;
Import java. Io. inputstream;
 
Public class cpumanager {
 
// Obtain the maximum CPU frequency (unit: kHz)
// "/System/bin/cat" command line
// "/Sys/devices/system/CPU/cpu0/cpufreq/cpuinfo_max_freq" Path of the file storing the maximum frequency
Public static string getmaxcpufreq (){
String result = "";
Processbuilder cmd;
Try {
String [] ARGs = {"/system/bin/cat ",
"/Sys/devices/system/CPU/cpu0/cpufreq/cpuinfo_max_freq "};
Cmd = new processbuilder (ARGs );
Process = cmd. Start ();
Inputstream in = process. getinputstream ();
Byte [] Re = new byte [24];
While (in. Read (re )! =-1 ){
Result = Result + new string (re );
}
In. Close ();
} Catch (ioexception ex ){
Ex. printstacktrace ();
Result = "N/";
}
Return result. Trim ();
}
 
// Obtain the Minimum CPU frequency (unit: kHz)
Public static string getmincpufreq (){
String result = "";
Processbuilder cmd;
Try {
String [] ARGs = {"/system/bin/cat ",
"/Sys/devices/system/CPU/cpu0/cpufreq/cpuinfo_min_freq "};
Cmd = new processbuilder (ARGs );
Process = cmd. Start ();
Inputstream in = process. getinputstream ();
Byte [] Re = new byte [24];
While (in. Read (re )! =-1 ){
Result = Result + new string (re );
}
In. Close ();
} Catch (ioexception ex ){
Ex. printstacktrace ();
Result = "N/";
}
Return result. Trim ();
}
 
// Obtain the current CPU frequency in real time (unit: kHz)
Public static string getcurcpufreq (){
String result = "N/";
Try {
Filereader Fr = new filereader (
"/Sys/devices/system/CPU/cpu0/cpufreq/scaling_cur_freq ");
Bufferedreader BR = new bufferedreader (FR );
String text = Br. Readline ();
Result = text. Trim ();
} Catch (filenotfoundexception e ){
E. printstacktrace ();
} Catch (ioexception e ){
E. printstacktrace ();
}
Return result;
}
 
// Obtain the CPU name
Public static string getcpuname (){
Try {
Filereader Fr = new filereader ("/proc/cpuinfo ");
Bufferedreader BR = new bufferedreader (FR );
String text = Br. Readline ();
String [] array = text. Split (": \ s +", 2 );
For (INT I = 0; I <array. length; I ++ ){
}
Return array [1];
} Catch (filenotfoundexception e ){
E. printstacktrace ();
} Catch (ioexception e ){
E. printstacktrace ();
}
Return NULL;
}
}
 
2. Memory:/proc/meminfo

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 ){
}
}
3. Rom sizeWww.2cto.com

Public long [] getrommemroy (){
Long [] rominfo = new long [2];
// Total Rom memory
Rominfo [0] = gettotalinternalmemorysize ();

// Available Rom memory
File 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;
}
4. sdcard size

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; // total size
Sdcardinfo [1] = bsize * availblocks; // available size
}
Return sdcardinfo;
}
　　
5. battery power

Private broadcastreceiver batteryreceiver = new broadcastreceiver (){
 
@ Override
Public void onreceive (context, intent ){
Int level = intent. getintextra ("level", 0 );
// Level plus % is the current power
}
};
Registerreceiver (batteryreceiver, new intentfilter (intent. action_battery_changed ));
6. System Version Information
?
Public String [] getversion (){
String [] version = {"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]; // kernelversion
Localbufferedreader. Close ();
} Catch (ioexception e ){
}
Version [1] = build. version. Release; // firmware version
Version [2] = build. Model; // Model
Version [3] = build. display; // System Version
Return version;
}
7. MAC address and boot time
?
Public String [] getotherinfo (){
String [] Other = {"null", "null "};
Wifimanager = (wifimanager) mcontext. getsystemservice (context. wifi_service );
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 );
}