In companion my app titlebar looks this
But in apk looks this
There is a theme option on screen one. Try changing it
Light theme and dark theme
You are using Light Theme.
Default and Light Theme are more or less the same except for Default that has DarkActionBar
Default --> DarkActionBar with white text (expects dark color, blue etc)
Light Theme --> LightActionBar with black text (expects light color, white etc)
/Boban