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Start your free trialamir baldiga
2,530 Pointswhen i run the app i can't get normal time display
when i try to run the app i get this message
java.lang.NullPointerException: id == null
my CurrentWeather method:
public String getRealTime(){
SimpleDateFormat format = new SimpleDateFormat("k:mm", Locale.US);
format.setTimeZone(TimeZone.getTimeZone(getTimeZone()));
Date day = new Date(getTime() * 1000);
return format.format(day);
}
and the call in the Main Activity:
mTimeLabel.setText("At" + mWeather.getRealTime() + "");
2 Answers
Steve Hunter
57,712 PointsHi there,
What is pointing to null
when you run your code?
I've got a version of this app that is a little more developed because I finished the course - a long time ago, hence my lack of recollection!!
So, the getRealTime()
method (my code has getFormattedTime()
) looks exactly like what you've got, so that's not where the problem is.
I suspect the null
is coming from the JSON - can you add a breakpoint near where this is called in MainActivity
? The mWeather
variable needs to hold something; adding a breakpoint would check that. In my code, it creates an instance of the Forecast
class then sets a few labels lik e mTemperatureLabel
then mTimeLabel
. We need to check that mWeather
holds something meaningful - the breakpoint will do that.
Steve.
amir baldiga
2,530 Pointsgot it figured by using a simple if() in the getRealTime to disallow a situation of null to be returned
thank you very much for helping me again :)
Steve Hunter
57,712 PointsThat's a good fix, yes. You may run into problems with that further in the project. Feel free to ask if you need any help !
Steve.