- Making http post requests using okhttp
- getApplicationContext (Context)
- scheduleAtFixedRate (Timer)
- startActivity (Activity)
- System (java.lang)
Provides access to system-related information and resources including standard
input and output. Ena
- Callable (java.util.concurrent)
A task that returns a result and may throw an exception. Implementors define a
single method with no
- 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
- Cipher (javax.crypto)
This class provides access to implementations of cryptographic ciphers for
encryption and decryption
- Servlet (javax.servlet)
Defines methods that all servlets must implement. A servlet is a small Java
program that runs within
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