In Android app development, the savedInstanceState method is a vital feature to make apps more functional and stable. The term saves data associated with a ViewModel when a view is destroyed. The ViewModel can be recreated later by the Android system, but this may take a long time, and you may end up with a view with all your data missing. The savedInstanceState method eliminates the problems associated with this method and allows you to store data in the ViewModel and use it later for reusing the app.
The savedInstanceState property of an Activity can be retrieved later. The property is created by the system when the Activity starts. It contains key-value pairs similar to a Map. Hence, if the activity is resumed, the savedInstanceState property will be restored. When resuming an Activity, the OS will call onSaveInstanceState() to retrieve the saved state. In Android, the OnCreate() method is called before onSaveInstanceState() method. It is used for starting audio-based content and UI animations.
The onSaveInstanceState method in Android app development is used to store state-related data of an activity. It is called when an activity is paused and about to go into the background. The savedInstanceState method will store the view hierarchy and prevent the activity from respawning. The savedInstanceState parameter is a mandatory parameter in Android app development. If you don’t need it, you can pass null as the value.