dataset - MPAndroidchart returning no chart Data available -

i having problems mpandroidchart. adding temperature , humidity data chart, displays "no chart data available". here can see bug is? super grateful!

//create data                  //set size of data                 int size = list.size();                 if (size > 24){ size = 24;}                  //create lists form temp , hum                 arraylist<entry> temps = new arraylist<entry>();                 arraylist<entry> hums = new arraylist<entry>();                   //fill list temp values                 (int = 0; < size; i++){                     entry value = new entry(math.round(list.get(list.size()-size + i).temp), (size-i));                     temps.add(value);                 }                  //fill list hum values                 (int = 0; < size; i++){                     entry value = new entry(math.round(list.get(list.size()-size + i).hum), (size-i));                     hums.add(value);                 }                  //other views on screen                 date.settext(datestring);                 time.settext(timestring);                 temp.settext(tempstring);                 hum.settext(humstring);                   //adding data , description array                 linedataset settemp = new linedataset(temps, "temperature");                 settemp.setaxisdependency(yaxis.axisdependency.left);                 linedataset sethum = new linedataset(hums, "humidity");                 sethum.setaxisdependency(yaxis.axisdependency.left);                  //adding arrays dataset                 arraylist<ilinedataset> datasets = new arraylist<ilinedataset>();                 datasets.add(settemp);                 datasets.add(sethum);                 arraylist<string> xvals = new arraylist<string>();                  //adding x values of range size                 (int = 0; < size; i++ ){                     xvals.add(string.valueof(i));                 }                  //add data , create chart                 linedata data = new linedata(xvals, datasets);                 chart.setdata(data);                 chart.invalidate();              }         }); 

i looking @ post long time. thing can think line:

math.round(list.get(list.size()-size + i).hum 

what's .hum ? generate unsupported type entry? resolution issue intrigues me since mr. phil j. did not found answer yet.