Activity switch and Async Android -

i have 2 activities: mainactivity associated main.xml layout (app "home" screen) , aboutactivity associated about.xml layout (app "about" screen).

while in aboutactivity, async task within mainactivity still tries access main.xml. app stop working result.

is there way can?

• "pause" async task within mainactivity , "resume" them when user switches aboutactivity
• or still access main.xml in background while in aboutactivity

additional information:
mainactivity launch activity. aboutactivity extends mainactivity. users can go "about" screen/ switch aboutactivity using option menu.

the async task within mainactivity put user's current location textview. about.xml contains static text. aboutactivity nothing show about.xml.

aboutactivity:

public class aboutactivity extends mainactivity {     @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);          setcontentview(r.layout.about);      }  } 

mainactivity:

public class mainactivity extends activity {     @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);             setcontentview(r.layout.main);             // creating new non-ui thread task download google place json data              placestask placestask = new placestask();                                             // invokes "doinbackground()" method of class placetask             placestask.execute(sb.tostring());         }          /** class, download google places */     private class placestask extends asynctask<string, integer, string>{          string data = null;          // invoked execute() method of object         @override         protected string doinbackground(string... url) {             //make asynctask wait debugger             //android.os.debug.waitfordebugger();              try{                 data = downloadurl(url[0]);             }catch(exception e){                  log.d(debug,e.tostring());             }             return data;         }          // executed after complete execution of doinbackground() method         @override         protected void onpostexecute(string result){                             textview curloc = (textview) findviewbyid(r.id.currentlocation);                 curloc.settext(result);         }      } } 

asynctask not pause can store data temporary when task complete , while start background activity show data on textview.