Displaying toast message in a text View android -

- May 15, 2015

i trying display toast message in textview needs update every second in order display package names (every second) i'm getting error in code saying "cannot refer non-final variable pnum inside inner class defined in different method"

in line "msgto.settext("optimized " + procinfos.get(pnum).processname);"

        // display package names         activitymanager actvitymanager = (activitymanager) getapplicationcontext()                 .getsystemservice(getapplicationcontext().activity_service);         list<runningappprocessinfo> procinfos = actvitymanager                 .getrunningappprocesses();         (int pnum = 0; pnum < procinfos.size(); pnum++) {             if ((procinfos.get(pnum)).processname.contains("android")                     || (procinfos.get(pnum)).processname.contains("system")                     || (procinfos.get(pnum)).processname.contains("huawei")                     || (procinfos.get(pnum)).processname.contains("adil")) {              } else {                 new thread(new runnable() {             @override             public void run() {                 try {                     thread.sleep(2000);                     //do thing here                      textview msgto = (textview) findviewbyid(r.id.optimizedapp);                      msgto.settext("optimized " +                      procinfos.get(pnum).processname);                 } catch (interruptedexception e) {                     e.printstacktrace();                 }             }         }).start();             }         }     }

i tried putting whole code in thread getting error in log cat (after 2 sec thread time)

06-30 06:35:15.379: e/androidruntime(5281): fatal exception: thread-12964 06-30 06:35:15.379: e/androidruntime(5281): process: com.example.xtremenetbooster, pid: 5281 06-30 06:35:15.379: e/androidruntime(5281): android.view.viewrootimpl$calledfromwrongthreadexception: original thread created view hierarchy can touch views.      // thread      new thread(new runnable() {         @override         public void run() {             try {                 thread.sleep(2000);                 // thing here                 // display package names                 activitymanager actvitymanager = (activitymanager) getapplicationcontext()                         .getsystemservice(                                 getapplicationcontext().activity_service);                 list<runningappprocessinfo> procinfos = actvitymanager                         .getrunningappprocesses();                 (int pnum = 0; pnum < procinfos.size(); pnum++) {                     if ((procinfos.get(pnum)).processname                             .contains("android")                             || (procinfos.get(pnum)).processname                                     .contains("system")                             || (procinfos.get(pnum)).processname                                     .contains("huawei")                             || (procinfos.get(pnum)).processname                                     .contains("adil")) {                         // toast.maketext(getapplicationcontext(),                         // "system apps",                         // toast.length_short).show();                     } else {                          textview msgto = (textview) findviewbyid(r.id.optimizedapp);                         msgto.settext("optimized "                                 + procinfos.get(pnum).processname);                     }                 }                 //             } catch (interruptedexception e) {                 e.printstacktrace();             }         }     }).start(); } // thread

your error coming trying access pnum @ msgto.settext("optimized " + procinfos.get(pnum).processname); when pnum defined inside for loop

see me