Welcome to the Treehouse Community
The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.
what is wrong with android:textColor="#ffffff"
I am trying to change the text color of the button to white, but not working.
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent"> <Button android:id="@+id/thrustButton" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/thrust_label" android:background="#ffaa0000" android:textColor="#fff" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" /> </android.support.constraint.ConstraintLayout>
The reason it is not working is because you are using the RGB code for white: #FFFFFF. Alpha RGB or ARGB has an alpha code in the beginning which is used to specify the transparency/opacity.
That's what the hint for the question means: "(Don't forget the "ff" alpha code at the beginning!)".
So add the extra 2 F's and you'll have #FFFFFFFF.