On Android, this process is notoriously slow and creates a high volume of temporary objects, which can trigger aggressive Garbage Collection (GC) and cause app "jank". Android-Specific Alternatives
While functional, standard Java serialization is often described by language designers as a "disaster" for several reasons: Android Java Serialize Arraylist
By design, the ArrayList class in Java is serializable by default. This means you don't need to implement any special interfaces to write an ArrayList to a byte stream using ObjectOutputStream . The real catch is that every inside that list must also implement java.io.Serializable . If even one object in a list of thousands fails this requirement, the entire process crashes with a NotSerializableException . The "Disaster" of Java Serialization On Android, this process is notoriously slow and
It bypasses constructors and uses reflection to "scrape" private fields directly from memory to create a byte stream. The real catch is that every inside that
Deserializing data from an untrusted source is a major security vulnerability, as it allows for the reconstruction of complex object graphs without proper validation.