How to set the theme for DialogFragment

Question

Can someone please explain why this statement works perfectly well:

setStyle(DialogFragment.STYLE_NO_TITLE, android.R.style.Theme_Holo);

and th

Answer 1

https://stackoverflow.com/a/24375599/2898715 it's also possible to omit the setStyle call altogether, and define the defulat style that DialogFragments will use throughout the whole app.

styles.xml

AndroidManifest.xml

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