- Finding current android device location
- getSupportFragmentManager (FragmentActivity)
- startActivity (Activity)
- onCreateOptionsMenu (Activity)
- OutputStream (java.io)
A writable sink for bytes.Most clients will use output streams that write data
to the file system (
- Socket (java.net)
Provides a client-side TCP socket.
- HashSet (java.util)
HashSet is an implementation of a Set. All optional operations (adding and
removing) are supported.
- ReentrantLock (java.util.concurrent.locks)
A reentrant mutual exclusion Lock with the same basic behavior and semantics as
the implicit monitor
- Pattern (java.util.regex)
Patterns are compiled regular expressions. In many cases, convenience methods
such as String#matches
- ImageIO (javax.imageio)
- Best IntelliJ plugins