ArrayMap is a data structure in Android that provides an efficient way to store and retrieve key-value pairs. It is part of the Android framework and is designed to be a memory-efficient alternative to HashMap for use in Android applications.
Here's how ArrayMap works:
1. Internal Structure
ArrayMap uses two arrays internally to store the keys and values. One array stores the hash codes of the keys, and the other array stores the actual keys and values. This structure allows for efficient storage and retrieval of data.
2. Hash Codes
When you add a key-value pair to an ArrayMap, it calculates the hash code of the key and stores it in the hash code array. This hash code is used for quick comparisons during lookups.
3. Collision Handling
ArrayMap uses a linear probing technique to handle hash collisions. If two keys have the same hash code, ArrayMap will search for the next available slot in the hash code array to store the new hash code.
4. Lookups
When you look up a key in an ArrayMap, it first calculates the hash code of the key and searches for it in ...
