What is use of onSaveInstanceState in Android?
What is use of onSaveInstanceState in Android?
onSaveInstanceState() is a method used to store data before pausing the activity.
When should I call onSaveInstanceState?
Note that onSaveInstanceState() is called when your activity goes into the background and NOT when the app process is about to be killed.
What is the significance of onSaveInstanceState and onRestoreInstanceState?
The onSaveInstanceState() method allows you to add key/value pairs to the outState of the app. Then the onRestoreInstanceState() method will allow you to retrieve the value and set it back to the variable from which it was originally collected.
What is the difference between the onPause () method and the onSaveInstanceState () method?
From the documentation I understand that onSaveInstanceState() should be called to store only temporary information, and onPause() should be used to store any persistent data.
How do I retrieve data from savedInstanceState?
Retrieve the saved instance state data in the onCreate(Bundle savedInstanceState) method use the Bundle input parameter also. You can also retrieve the saved instance state data in the onRestoreInstanceState(Bundle savedInstanceState) method.
What is activity activity life cycle?
Activity Lifecycle: Activity is one of the building blocks of Android OS. In simple words Activity is a screen that user interact with. Every Activity in android has lifecycle like created, started, resumed, paused, stopped or destroyed. These different states are known as Activity Lifecycle.
What is onSaveInstanceState?
onSaveInstanceState method gets called typically before/after onStop() is called. This varies from Android version to version. In the older versions it used to get before onStop() . Inside this method, we save the important values in the Bundle in the form of key value pairs.
What is activity life cycle in Android?
What is OnRestoreInstanceState?
OnRestoreInstanceState(Bundle) This method is called after #onStart when the activity is being re-initialized from a previously saved state, given here in savedInstanceState.
When onPause method is called in Android?
onPause. Called when the Activity is still partially visible, but the user is probably navigating away from your Activity entirely (in which case onStop will be called next). For example, when the user taps the Home button, the system calls onPause and onStop in quick succession on your Activity .
