- Making http post requests using okhttp
- putExtra (Intent)
- getSystemService (Context)
- setContentView (Activity)
- ObjectMapper (com.fasterxml.jackson.databind)
ObjectMapper provides functionality for reading and writing JSON, either to and
from basic POJOs (Pl
- InputStreamReader (java.io)
A class for turning a byte stream into a character stream. Data read from the
source input stream is
- KeyStore (java.security)
KeyStore is responsible for maintaining cryptographic keys and their owners.
The type of the syste
- ArrayList (java.util)
ArrayList is an implementation of List, backed by an array. All optional
operations including adding
- Collections (java.util)
This class consists exclusively of static methods that operate on or return
collections. It contains
- Dictionary (java.util)
Note: Do not use this class since it is obsolete. Please use the Map interface
for new implementatio
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