- Creating JSON documents from java classes using gson
- getExternalFilesDir (Context)
- addToBackStack (FragmentTransaction)
- onRequestPermissionsResult (Fragment)
- File (java.io)
An "abstract" representation of a file system entity identified by a pathname.
The pathname may be a
- System (java.lang)
Provides access to system-related information and resources including standard
input and output. Ena
- Calendar (java.util)
Calendar is an abstract base class for converting between a Date object and a
set of integer fields
- GregorianCalendar (java.util)
GregorianCalendar is a concrete subclass of Calendarand provides the standard
calendar used by most
- Pattern (java.util.regex)
Patterns are compiled regular expressions. In many cases, convenience methods
such as String#matches
- Collectors (java.util.stream)
- Top plugins for Android Studio