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Let's fix that error! In this video we'll fix a couple errors and then set the text color of our button.
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Back in the ColorWheel class,
0:00
let's change getColor to return
an Int instead of a String.
0:02
And now we need to convert
the string color to an Int.
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Right above the return statement,
let's add a new val named colorAsInt.
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And let's set it equal to Color with
a capital C and enter to import it dot.
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And then if we start typing
parseColor we can see that parseColor
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is a method that takes in
a colorString and returns an Int.
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Just what we're looking for.
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The parseColor method is
a handy utility method
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that takes a hexadecimal string
just like what we have up here.
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And converts it to an integer
representation the Android can understand.
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So now instead of returning
a randomly selected colorString,
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let's pass that random colorString
into the parseColor method.
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So we'll pass in colors
at index randomNumber.
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Finally, since we need to be returning
integer, let's return our new color as int
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variable, And
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head back to FunFactsActivity.
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Now instead of a string, we're returning
an int, and everything looks good.
1:19
Now let's run our app and
verify it's working as we expect it to.
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Okay, moment of truth.
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Tap the button, and nice,
all sorts of different colors.
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There's one more thing I'd like
to do here, one last color.
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Notice that the color of
the button text is black, but
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in our mockups,
it's matching the background color.
1:47
Let's go back to our code and change this.
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In our OnClickListener, we already
have a color that we want to use and
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we already have a variable for
our button, showFactButton.
1:58
Let's add a new line at the bottom
of our OnClickListener and
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add a reference to our button.
2:04
Then let's assert that it's not null.
2:07
And then let's look for
the method we need.
2:10
Let's type .set and we're looking for
text color so let's add textcolor.
2:12
And then right here,
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we see a method called setTextColor
that takes in an Int parameter.
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Let's click that one.
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Then, let's pass in our color variable.
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Cool, but we're not quite done.
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We're only changing the text color
after the button has been tapped.
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If the button hasn't been tapped,
we'll still see black text.
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We should change our button's default
text color to match the default
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background, green.
2:43
Let's go back into our
activity_fun_facts layout file and
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make sure we're on the Design tab.
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Then let's select our relativeLayout and
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copy the green color from
the background property.
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Then let's select our button,
scroll down to the textColor property,
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Paste in our color and hit Enter.
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And there we go, green text.
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Now let's run the app and
make sure everything works.
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Okay, just like we expected.
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Lots of different colors for
the background and
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lots of different colors for
the button text.
3:26
All right,
the app's really coming together.
3:30
We're done with all the programing but
3:33
there's still one little thing before we
can move on to testing and debugging.
3:34
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