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We are ready to display our data! Using the mockup as our guide, we will start designing the layout for Stormy by anchoring the temperature in the center of the Activity.
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[MUSIC]
0:00
We've come a long way
thus far in the course.
0:04
We've seen how to connect our app to
the Internet, handled different network
0:07
errors, and we've learned about,
and how to process JSON data.
0:10
That's a lot.
0:15
You should be proud of
the work you've done so far.
0:16
Next, we need to create our layout and
0:19
connect it to the data we just
created in the current weather class.
0:21
Let's get started with the layout
based on the mock ups provided
0:26
by the amazing Treehouse design team.
0:29
Let's take another look at the mock up for
our app, and
0:33
think about how we should get started.
0:35
First off, we'll set the background color,
then we can start adding additional views.
0:37
Android Studio has provided
us with a constraint layout.
0:42
As you learned in other courses,
constraint layout
0:46
allows you to create large and complex
layouts with a flat view hierarchy.
0:49
We'll start here in the center
with the temperature,
0:55
and work our way around the layout.
0:58
Since the temperature
value is the main feature,
1:01
we want to make sure it's
always in the same place.
1:04
One thing I'd like to stress here,
1:07
laying out views in Android could
be more of an art than a science.
1:09
There are many different ways to lay
out things, some better than others.
1:12
The solution and method we use here
will be helpful in many cases.
1:18
But by no means is it the only
way to complete the layout.
1:23
I highly recommend creating your
own sample layouts for practice.
1:27
So let's get started with
changing the background color.
1:34
If we select a constraint layout,
look at all the attributes,
1:38
Find the background attribute here.
1:45
Here we get the resources
window to open up.
1:49
We want to set a color here
on the left hand side and
1:52
since the color of our
mock-up isn't in here.
1:55
We need to add a new resource,
and new color value.
1:58
Unfortunately, since our mock-up
doesn't live inside Android Studio,
2:05
we can't use this color picker here.
2:09
I'll use an external app
that will allow us to select
2:13
the background color from the mock-up.
2:16
I'll put links to a couple of color picker
options in the teacher's notes as well.
2:19
Okay, so we found our color value and
can now add it to our color resources.
2:23
So, here it is 0073d2.
2:28
So, we come over here,
let's name it appbackground.
2:29
And our hex value is 0073D2.
2:44
Now recall that these
first two characters,
2:50
the FF here adjust
the opacity of the color.
2:53
Since we want this to be the full color,
2:57
we just want to keep
those the way they are.
2:59
So with our color and
our app color name, we can hit OK.
3:02
Great, our app color is in place.
3:08
Let's add a new view for
the temperature to our layout.
3:11
So we'll select Text, in TextView, drag it
down here to put it in about the center.
3:14
Let's change the ID.
3:21
We'll call it temperature value.
3:25
Change the placeholder text to 100.
3:29
We'll just do that for now since it
will give us a nice size to work from.
3:35
Let's go back to all attributes.
3:42
We want to go down to text color.
3:46
Text color.
3:55
We want to color,
we want to choose Android white.
3:57
And we'll change the text size to 150 sp.
4:03
And whoa, our preview really changed.
4:09
I thought we've lined it up
pretty close to the center.
4:12
Yes, we forgot to add
constraints to our text view.
4:15
Let's re-center this,
just make it a little bit easier.
4:18
And add our constraints, so,
the top, we'll go to the top.
4:24
And left and right.
4:31
Very nice, now our temperature
value text view is constrained
4:38
to the center within our layout.
4:42
Next up, let's add the degree symbol.
4:45
That's part of the resources
the design team has provided.
4:48
So we can add an ImageView.
4:52
Add an ImageView.
4:55
Drag it to about there.
4:57
Under Drawable Project, Degree.
5:00
Let's change the ID here
to degree image view.
5:13
And now we need to constrain it
to our temperature text view.
5:20
Recall that we need to set a minimum
of two constraints on views.
5:23
We'll want the top of the degree symbol
5:28
to be constrained to the top
of our temperature value.
5:31
Our other constraint will be the left side
of the degree image with the right side of
5:35
the temperature value.
5:39
With that lined up,
5:46
it looks like we need to push it down from
the top of the temperature value a bit.
5:47
We can do that by adding some margin to
the top, there are two ways to do that.
5:51
Either here in the layout
margin attribute under top.
5:57
So we can add 35dp in here.
6:09
And we see that it moves
the degree image view down a bit.
6:12
We could have also done
this in the view inspector.
6:17
They both accomplish the same thing.
6:22
I find that I just use whichever
interface I have open.
6:24
This is off to a great start.
6:28
Since our app is only designed for
portrait mode, let's head into the Android
6:30
manifest file and make sure that our
activity is set to that orientation..
6:34
So manifests > Android manifest.
6:40
If we look here under application,
6:45
we want android:screenOrientation,
6:50
and we want to set that to portrait.
6:56
With that set, let's take a quick
break before we come back
7:02
to tackle the top portion of our layout.
7:06
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