Why getApplicationContext().setTheme() in a Activity does not work?

Question

i am currently have a hard time for calling to getApplicationContext().setTheme() in a activity, I just want to apply a theme resource in a application scope in

Answer 1

I didn't try this out myself, but if it was absolutely necessary to set the theme programatically, the next thing I'd try would be to derive a class from Application and override the onCreate method like in the following:

public class MyApplication extends android.app.Application {
    @Override
    public void onCreate() {
        super.onCreate();
        setTheme(android.R.style.Theme_Black_NoTitleBar_Fullscreen);

    }
}