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Valentino Galasso
1,488 PointsA 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?
1 Answer

Maciej Czuchnowski
36,440 PointsThis is what helped me. Go to your styles.xml
file and change this line:
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
to:
<style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar">
(just add Base.
in front of the parent
value)
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.
Valentino Galasso
1,488 PointsValentino Galasso
1,488 PointsMany thanks Maciej! Solved