public static void setSelectedMapRenderTheme(final String tileProvider, final String customRenderThemeFile) {
        Log.e("setTheme: " + tileProvider + " / " + customRenderThemeFile);
        setSelectedMapRenderTheme(customRenderThemeFile);
        putStringDirect(CgeoApplication.getInstance().getString(R.string.pref_renderthemefile) + "-" + tileProvider, customRenderThemeFile);
    }
variant used by UnifiedMap: store tileprovider-specific (additionally)
main/src/main/java/cgeo/geocaching/settings/Settings.java