- Start an intent from android
- putExtra (Intent)
- addToBackStack (FragmentTransaction)
- scheduleAtFixedRate (ScheduledExecutorService)
- File (java.io)
An "abstract" representation of a file system entity identified by a pathname.
The pathname may be a
- Socket (java.net)
Provides a client-side TCP socket.
- Calendar (java.util)
Calendar is an abstract base class for converting between a Date object and a
set of integer fields
- Collections (java.util)
This class consists exclusively of static methods that operate on or return
collections. It contains
- Properties (java.util)
A Properties object is a Hashtable where the keys and values must be Strings.
Each property can have
- Cipher (javax.crypto)
This class provides access to implementations of cryptographic ciphers for
encryption and decryption
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