The LiveData In Android
THE ADVANTAGES OF USING LIVEDATA ARE AS FOLLOWS :
1. Ensures your UI matches your data state
LiveData follows the observer pattern. LiveData notifies observers objects when the lifecycle state changes. You can consolidate your code to update the UI in these observer objects. Instead of updating the UI every time the app data changes, your observer can update the UI every time there's a change.
2. No memory leaks
Observers are bound to LifeCycle objects and clean up after themselves when their associated lifecycle is destroyed.
3. No crashes due to stopped activities
If the observer's lifecycle is active, such as in the case of an activity in the back stack, then it doesn’t receive any LiveData events.
4. No more manual lifecycle handling
UI components just observe relevant data and don’t stop or resume observation. LiveData automatically manages all of this since it’s aware of the relevant lifecycle status changes while observing.
5. Always up to date data
If a lifecycle becomes inactive, it receives the latest data upon becoming active again. For example, an activity that was in the background receives the latest data right after it returns to the foreground.
6. Proper configuration changes
If an fragment is recreated due to a configuration change, like device rotation, it immediately receives the latest available data.
7. Sharing resources
You can extend a LiveData object using the singleton pattern to wrap system services so that they can be shared in your app. The LiveData object connects to the system service once, and then any observer that needs the resource can just watch the LiveData object. For more information, see Extended LiveData.