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Setting CurrentWeather from JSON
5:14Now it's time to actually populate our data model object with the real weather data from Dark Sky.
We've seen how to access our JSON weather
data and parse single field data.
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Next, let's look at how we can drill down
and get data inside a nested JSON object.
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For our Stormy app, we want to get data
inside the currently key, seen here.
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Why don't you give it a try yourself?
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Pause me, write it out, and
come back and see how you did.
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Let's declare a new JSONObject variable.
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So we can put it down here.
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We'll call it currently.
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It's equal to forecast.
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We'll getJSONObject ("currently").
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How did you do?
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I'm sure you did great.
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Let's take another look at our JSON.
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We now have all the data we need to
create a new CurrentWeather object using
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our CurrentWeather model.
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There are several data points to
fill in here, so let's get started.
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Go back over here to MainActivity.
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Let's create our CurrentWeather object.
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CurrentWeather.
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Call it currentWeather.
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New CurrentWeather object.
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Now we set all the values
from our data model.
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SetHumidity.
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It's a double, so we getDouble.
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And it's humidity.
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SetTime.
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GetLong, and that's time.
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Set our Icon.
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For the location label, we'll just hard
code the location, Alcatraz Island,
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California.
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CurrentWeather, SetLocationLabel,
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Alcatraz Island, California.
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Oops.
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CurrentWeather.setPrecipChance.
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And that's a double, and
that key was precipProbability.
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Set the Summary.
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GetString("summary").
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And then we'll set the Temperature.
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And that's a double,
and that's temperature.
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Now that we have a CurrentWeather object,
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we can return that instead
of returning null.
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Great work!
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How do we check that everything
is working so far, though?
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We don't have a layout yet
to view all this data.
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We could add a lot of log statements
to our code, but that seems tedious.
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Let's use the debugger.
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If we set a break point in our code,
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we can investigate the variables
at that break point.
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So let's set a break point
here at CurrentWeather.
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And run the app, using the debugger.
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Go here into the Debug screen
Show our currently object,
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Step into it, So right now,
we don't have any values anywhere.
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We step over each line.
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If we open up CurrentWeather,
we notice we don't have any values.
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If we step over, Everything will
get populated line by line.
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Congratulations!
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We now have a fully populated data model.
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Nice work.
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