Android Data Storage: SharedPreferences, Files & SQLite

In Android, there are several main methods for storing data:

1. SharedPreferences is suitable for storing simple key-value pair data, ideal for storing small configuration information.
2. File storage: You can use the FileOutputStream and FileInputStream classes to read and write files, suitable for storing larger amounts of data.
3. SQLite database: SQLite database is built into Android, and can be created and managed using the SQLiteOpenHelper class, which is suitable for storing structured data.
4. The Room Persistence Library, built on top of SQLite, offers a simpler API for database operations.
5. ContentProvider is used for sharing data between applications, where data can be stored in ContentProvider and accessed or manipulated through ContentResolver.
6. Firebase Realtime Database allows you to store and sync data using the real-time database service provided by Firebase, which is ideal for applications requiring real-time data synchronization.