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Start your free trialRunkun Miao
4,186 PointsNullPointerException returns when I click daily button
FATAL EXCEPTION: main
Process: com.example.miaor.tutorialweather, PID: 4261
java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.String.hashCode()' on a null object reference
at com.example.miaor.tutorialweather.ForecastData.Forecast.getIconID(Forecast.java:44)
at com.example.miaor.tutorialweather.ForecastData.Day.getIconID(Day.java:83)
at com.example.miaor.tutorialweather.adapters.Adapter.getView(Adapter.java:63)
As my error log shows, the problem is from getting IconID and the debug report also reveals that the mIcon = null when the adapter is setting.
public class Forecast {
private Current mCurrent;
private Hour[] mHours;
private Day[] mDays;
public static int getIconID(String weather){
switch (weather){
case "clear-day":
return R.drawable.clear_day;
case "clear-night":
return R.drawable.clear_night;
case "rain":
return R.drawable.rain;
case "snow":
return R.drawable.snow;
case "sleet":
return R.drawable.sleet;
case "wind":
return R.drawable.wind;
case "fog":
return R.drawable.fog;
case "cloudy":
return R.drawable.cloudy;
case "partly-cloudy-day":
return R.drawable.partly_cloudy;
case "partly-cloudy-nigh":
return R.drawable.cloudy_night;
default:
return R.drawable.sunny;
}
}
}````
public class Day implements Parcelable{
private long mTime;
private String mSummary;
private double mTemperatureMax;
private String mIcon;
private String mTimeZone;
public int getIconID(){
return Forecast.getIconID(mIcon); }
}
public class Adapter extends BaseAdapter {
private Context mContext;
private Day[] mDays;
public Adapter(Context context, Day[] Day){
mContext = context;
mDays = Day;
}
@Override
public int getCount() {
return mDays.length;
}
@Override
public Object getItem(int position) {
return mDays[position];
}
@Override
public long getItemId(int position) {
return 0; ///used to tag items for easy items
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null){
convertView = LayoutInflater.from(mContext).inflate(R.layout.daily_list_item, null);
holder = new ViewHolder();
holder.dayLabel = (TextView) convertView.findViewById(R.id.DayName_Daily);
holder.iconImageView = (ImageView) convertView.findViewById(R.id.IconWeather_Daily);
holder.temperatureLabel = (TextView) convertView.findViewById(R.id.TemperatureLabel_Daily);
convertView.setTag(holder);
}
else {
holder = (ViewHolder) convertView.getTag();
}
Day day = mDays[position];
holder.iconImageView.setImageResource(day.getIconID());
holder.temperatureLabel.setText(day.getTemperatureMax()+"");
holder.dayLabel.setText(day.getDayOfTheWeek());
return convertView;
}
private static class ViewHolder{
ImageView iconImageView;
TextView temperatureLabel;
TextView dayLabel;
}
}
Simon Coates
28,694 PointsSimon Coates
28,694 Pointsum, well i can't see anything that would set mIcon, and i'm not sure null is supported in a switch (see http://stackoverflow.com/questions/18263489/why-doesnt-string-switch-statement-support-a-null-case)