LiveData Internals Explained: Why postValue Drops Data & How Lifecycle Awareness Works
A deep dive into ObserverWrapper, mVersion tracking, and why postValue() might be dropping your data. ⚡ TL;DR: The 60-Second Summary Lifecycle Awareness: LiveData wraps observers in LifecycleBoundObserver to monitor isAtLeast(STARTED) . postValue vs setValue: postValue coalesces updates into a single batch; it drops intermediate values to avoid flooding the Main Thread. Sticky Behavior: Managed via an internal mVersion counter compared against the observer’s mLastVersion . Memory Safety: Automatically removes observers in DESTROYED state (except for observeForever ). Active Hooks: Uses onActive() and onInactive() to manage resource-heavy data sources like Room or GPS. Most Android developers use LiveData daily as the default state holder in MVVM architecture in Android . As a core part of Android Architecture Components , it is designed...