Welcome to the Treehouse Community
Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.Start your free trial
A render problem. Getting the following messages: "Failed to load AppCompat ActionBar with unknown error. "
I'm not able to see any update in the preview windows when changes are done in .xml file. Any suggestion?
Maciej Czuchnowski36,441 Points
This is what helped me. Go to your
styles.xml file and change this line:
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar">
Base. in front of the
This will bring back the preview, although it may not display the title bar (the title bar will correctly display in the emulator though). It's some kind of bug in the current version of Android Studio.