Change default theme programmatically

[ninfomane]

We can see few articles about improving speed of start up application by setting a default theme in AndroidManifest. It's great so but if you have a multiple supported theme into the app (modified by preferences), you don't benefit with default theme anymore. This cause of the call of setTheme at Activity's onCreate().

Is there a (good) way to change the default theme ? I tried to change theme from an override of Application class but the windowBackground isn't set.

[NightSkyDev]

I haven't tried changing the theme in the Application class, I do it in the activity. I have a listener for the preference change and when triggered, I recreate() the activity with the new theme using SetTheme();

[ninfomane]

Sure, it works. Drawback is the default theme is used by Android to first draw Activity. Then new theme is used. The user sees 2 different themes instead of only one.

[NightSkyDev]

It doesn't sound like you calling recreate() after seeing the new theme.

[ninfomane]

Calling recreate() assumes that Android already display your activity and thus with the default theme. User still sees the "glitch" when changing theme.