getCurrentTheme function
Returns name of current theme
Implementation
Future<TupleTheme> getCurrentTheme() async {
SharedPreferences prefs = await SharedPreferences.getInstance();
String themeName = prefs.getString('theme');
print(themeName);
if (themeName == null)
return defaultTheme;
else
for (var i = 0; i < ThemeNames.length; i++)
if (ThemeNames[i].name == themeName) return ThemeNames[i];
return defaultTheme;
}