Code for CPU usage

 

Import java. Io. ioexception;

Import java. Io. randomaccessfile;

Import Android. App. activity;

Import Android. OS. Bundle;

Import Android. widget. textview;

Public class textactivity extends activity {

Private textview mytext;

/** Called when the activity is first created .*/

@ Override

Public void oncreate (bundle savedinstancestate ){

Super. oncreate (savedinstancestate );

Setcontentview (R. layout. Main );

Mytext = (textview) findviewbyid (R. Id. Text );

String sysv = "CPU usage of your mobile phone:" + readusage ();

Mytext. settext (sysv );

}

Private float readusage (){

Try {randomaccessfile reader = new randomaccessfile ("/proc/STAT", "R ");

String load = reader. Readline ();

String [] toks = load. Split ("");

Long idle1 = long. parselong (toks [5]);

Long cpu1 = long. parselong (toks [2]) + long. parselong (toks [3]) + long. parselong (toks [4]) + long. parselong (toks [6]) + long. parselong (toks [7]) + long. parselong (toks [8]);

Try {thread. Sleep (360 );

} Catch (exception e ){}

Reader. Seek (0 );

Load = reader. Readline ();

Reader. Close ();

Toks = load. Split ("");

Long idle2 = long. parselong (toks [5]);

Long cpu2 = long. parselong (toks [2]) + long. parselong (toks [3]) + long. parselong (toks [4]) + long. parselong (toks [6]) + long. parselong (toks [7]) + long. parselong (toks [8]);

Return (INT) (100*(cpu2-cpu1)/(cpu2 + idle2)-(cpu1 + idle1 )));

} Catch (ioexception ex) {ex. printstacktrace ();

}

Return 0 ;}

}