- Parsing JSON documents to java classes using gson
- addToBackStack (FragmentTransaction)
- scheduleAtFixedRate (Timer)
- getExternalFilesDir (Context)
- ObjectMapper (com.fasterxml.jackson.databind)
ObjectMapper provides functionality for reading and writing JSON, either to and
from basic POJOs (Pl
- FileOutputStream (java.io)
An output stream that writes bytes to a file. If the output file exists, it can
be replaced or appen
- OutputStream (java.io)
A writable sink for bytes.Most clients will use output streams that write data
to the file system (
- Random (java.util)
This class provides methods that return pseudo-random values.It is dangerous to
seed Random with the
- Collectors (java.util.stream)
- Base64 (org.apache.commons.codec.binary)
Provides Base64 encoding and decoding as defined by RFC 2045.This class
implements section 6.8. Base
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