android Nullpointerexception with intent data=null always -

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i creating app, contains 3 activities, say, a, b , c. activity main activity, launches when app opens.

activity called activity b using startactivityforresult(intent, 1); activity b returns result, captured, , within onactivityresult of activity a, launching activity c using startactivityforresult(intent2, 2);

here onactivityresult activity a

@override protected void onactivityresult(int requestcode, int resultcode, intent data){     log.d("main","inside on activity result requestcode : " + requestcode);     if(requestcode == 1){         if(resultcode == result_ok){             log.d("mainact", "inside result code ok");             if(data.getstringextra("puzzleid")!=null){                 log.d("mainact", "inside puzzle has been selected");                 string puzzleidresult = data.getstringextra("puzzleid");                 intent puzzleintent = new intent(mainactivity.this, trialactivity.class);                 puzzleintent.putextra("puzzleid", puzzleidresult);                 startactivityforresult(puzzleintent, 2);             }          }     }else if(requestcode == 2){          log.d("mainact", "inside request code 2 result code : " + resultcode);          if(resultcode == 0){              if(data!=null){              log.d("mainact", "inside status not null");              string puzzlestatus = data.getstringextra("status");              log.d("mainact", "puzzle status retrieved : " + puzzlestatus);              if(puzzlestatus.equals("pause")){                  log.d("mainact", "inside puzzle status paused");              }     }else{           log.d("mainact", "data null!!");     } }

this return result intent activity c

@override protected void onpause() {     super.onpause();     log.d(trialtag, "on pause called");         log.d(trialtag, "sending intent");         string puzzleid = integer.tostring(puzzle_id);     intent returnpause = new intent();     returnpause.putextra("status", "pause");     returnpause.putextra("puzzleid", puzzleid);     if(getparent() == null){         setresult(activity.result_ok, returnpause);     }else{         getparent().setresult(activity.result_ok, returnpause);     }     finish();  }

on returning activity c, getting nullpointerexception, , statement.

java.lang.runtimeexception: failure delivering result resultinfo{who=null, request=2, result=0, data=null} activity  {com.mypackagename.sudoku/com.mypackagename.sudoku.mainactivity}: java.lang.nullpointerexception

i put in data!=null check later prevent crash. data null!! everytime pause in activity c. tried getparent method after reading through other solutions on so, not helping. why data getting set in activity b not in activity c?this first full fledged app, please excuse ignorance.

it seems setresult() method not getting called since result code set per exception 0 (result_canceled) , not -1 (result_ok)

are sure activity c not crashing @ integer.tostring(puzzle_id)??

debugging onpause() method of activity c resolve crash.

p.s: that's why should avoid using magic numbers if(resultcode == 0)

p.s: fyi, result_canceled (0) : if child activity fails reason (such crashing), parent activity receive result code result_canceled.

update

setting result in onpause() or ondestroy wont work. set result in either onbackpressed() or in onfinish()

see result not set in onpause() using setresult() when pressing button


Comments

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