- Creating JSON documents from java classes using gson
- findViewById (Activity)
- getExternalFilesDir (Context)
- getApplicationContext (Context)
- FileOutputStream (java.io)
An output stream that writes bytes to a file. If the output file exists, it can
be replaced or appen
- Permission (java.security)
Legacy security code; do not use.
- HashMap (java.util)
HashMap is an implementation of Map. All optional operations are supported.All
elements are permitte
- Locale (java.util)
Locale represents a language/country/variant combination. Locales are used to
alter the presentatio
- Executor (java.util.concurrent)
An object that executes submitted Runnable tasks. This interface provides a way
of decoupling task s
- Logger (org.apache.log4j)
This is the central class in the log4j package. Most logging operations, except
configuration, are d
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