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Android Build an Interactive Story App (Retired) Finishing the User Interface Customizing a Button

Edwin Rozario
Edwin Rozario
2,922 Points
Posted by Edwin Rozario
Edwin Rozario
2,922 Points

<Button android:textColor="#ffffff" /> not working for challenge

I am at the challenge https://teamtreehouse.com/library/build-an-interactive-story-app/finishing-the-user-interface/customizing-a-button

and

android:textColor="#ffffff" dosent seem to be working.

Error! Make sure you are using the right color code for white.

activity_main.xml 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <Button
        android:id="@+id/thrustButton"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:text="@string/thrust_label"
        android:background="#ffaa0000"
        android:textColor="#ffffff"/>

</RelativeLayout>

3 Answers

Jon Kussmann
PLUS
Jon Kussmann
Courses Plus Student 7,254 Points
Jon Kussmann
Jon Kussmann
Courses Plus Student 7,254 Points

Hi Edwin,

It looks like you forgot the "alpha" value when setting your text color. You should have 8 "f's"

Edwin Rozario
Edwin Rozario
2,922 Points
Edwin Rozario
Edwin Rozario
2,922 Points

Thanks John

 But even 3 f's seems to work in my local.
Jon Kussmann
Jon Kussmann
Courses Plus Student 7,254 Points
Jon Kussmann
Jon Kussmann
Courses Plus Student 7,254 Points

Yes, 3/6 values for a hex color will work in practice.

The 6 "digit" hex color does not specify an alpha value so will (I believe) default to completely opaque, or ff.

The 3 "digit" hex color is a shorthand way of specifying a 6 "digit" hex color if each pair of values is the same. For example: #AABBCC can be put as #ABC.

However, if you want the specific color #A1B23C, you have to use all 6 "digits" and cannot shorten it.

The exercise wanted you to explicitly set an alpha value (said so in the question), which is why it was needed for a correct answer.