In your Twitter class there are some hardcoded strings for converting a date to a string. Remember to use string resource files instead of hardcoding strings like this. In the future you may want your app to be translated or you could potentially change the strings to display based on if the device is in landscape mode. As such you generally never want to hardcode a user visible string. (It's fine for logging or internal usage).
Also just for your information there are some Android classes that can do this sort of conversion of a time/date to string which may be easier in the future (though maybe here you needed something more specific):
https://developer.android.com/reference/android/text/format/DateUtils#getRelativeDateTimeString(android.content.Context,%20long,%20long,%20long,%20int)
In your Twitter class there are some hardcoded strings for converting a date to a string. Remember to use string resource files instead of hardcoding strings like this. In the future you may want your app to be translated or you could potentially change the strings to display based on if the device is in landscape mode. As such you generally never want to hardcode a user visible string. (It's fine for logging or internal usage).
Also just for your information there are some Android classes that can do this sort of conversion of a time/date to string which may be easier in the future (though maybe here you needed something more specific):
https://developer.android.com/reference/android/text/format/DateUtils#getRelativeDateTimeString(android.content.Context,%20long,%20long,%20long,%20int)