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Android Build a Weather App (2015) Hooking Up the Model to the View Plugging in the Data

Kody Kendall
Kody Kendall
2,473 Points
Posted by Kody Kendall
Kody Kendall
2,473 Points

Null Pointer Exception on mCurrentWeather object

I've seen a couple questions related to Null Pointer Exceptions, but not any specifically saying it's the mCurrentWeather object causing them.

Here's a line in the stack trace error I'm seeing:

Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'double weather.android.kodyckendall.com.myweather.CurrentWeather.getHumidity()' on a null object reference.

Any thoughts? Do you think it's in the CurrentWeather class or the main? All the getters and setters are filled out appropriately.

Steve Hunter
Steve Hunter
57,712 Points

Hi Kody,

Can you post your code, please?

The error trace will probably tell you which line initiated the error but it is likely to be where getHumidity() is being called. I'm guessing but it looks like whatever that method got called against is pointing at nothing.

Let's have a look at your code and we can go from there. I'll open Studio so I can compare with my code, which is a little old now but might help!

Steve.

Suleyman Orazgulyyev
Suleyman Orazgulyyev
Courses Plus Student 5,798 Points
Suleyman Orazgulyyev
Suleyman Orazgulyyev
Courses Plus Student 5,798 Points

Hey! It may be that at the moment of calling that function don't have the Forecast yet, maybe there is no internet connection, or maybe you try to get the humidity before initializing your forecast. But as Steve said it's better to post the code :) at least the line where it's pointing to.