java - AsyncTask must be abstract -

i'm pretty new asynctask on android, i'm trying pass int

new starttestasync().execute(grayval); 

to asynctask

public class starttestasync extends asynctask<integer, void, void> { double[] timearray = new double[500]; // set array double lagstarttime; double lagendtime; double lagtimeresult; int testamount;  protected void doinbackground(int...grayval) {     (testamount = 0; testamount < 500; testamount++) {         lagstarttime = system.nanotime(); //start lagtimer start         while (grayval >= 100) {             log.i("mat value", string.valueof(grayval));             lagendtime = system.nanotime();         }     }  } 

android studio says "asynctask must abstract", have no idea how fix new asynctasks.

edit: full code http://pastebin.com/vrf8rb3h

from documentation:

asynctask must subclassed used. subclass override @ least 1 method (doinbackground(params...)), , override second 1 (onpostexecute(result).)

that means, have override method onpostexecute(result) too:

protected void onpostexecute(long result) {      //do }