What methods do you know to implement data caching to improve application performance?

To cache data in Android applications, several methods can be used to improve performance and reduce latency:

• In-memory cache — storing data in RAM, for example, using LruCache. Fast access, but data is lost when the app is closed.

• Disk Cache — saving data to disk, for example, using Room (SQLite), files, or libraries like DiskLruCache. Allows data to persist between sessions.

• HTTP request caching — using the built-in cache of OkHttp, which automatically saves server responses and reuses them when needed.

• SharedPreferences — for simple key-value data that needs to be quickly saved and retrieved.

• Using third-party libraries — for example, Glide or Picasso for image caching.

Example of using LruCache:

val cache = object : LruCache<String, Bitmap>(cacheSize) {}

// Add to cache
cache.put(key, bitmap)

// Retrieve from cache
val cachedBitmap = cache.get(key)

The choice of method depends on the data type and cache lifetime requirements.