How would you preserve activity state during a screen rotation?

How would you preserve activity state during a screen rotation?

Prevent Activity to recreated Another most common solution to dealing with orientation changes by setting the android:configChanges flag on your Activity in AndroidManifest. xml. Using this attribute your Activities won’t be recreated and all your views and data will still be there after orientation change.

How do I save an instance state to save an activity state?

In order to save sates of UI, I override onSaveInstanceState(Bundle savedInstanceState) and save all the data of the UI in savedInstanceState Bundle. This method is called before onStop() in older versions of Android (till android 8.0) and can be called after onStop() for newer versions. super.

How do I stop Android from restarting activity when changing orientations?

If you want the activity to not restart during screen orientation change, you can use the below AndroidManifest. xml. Please note the activity android:configChanges=”orientation|screenSize” attribute. This attribute makes the activity not restart when change screen orientation.

How can I save my activity data in Android?

To save the data before the activity is destroyed. You can do it in the onSaveInstanceState(Bundle savedInstanceState) method. The data is saved in name value pair format. In this example, the names are my_string, my_boolean, my_double, my_int and my_parcelable.

How do you handle rotation on Android?

To change your auto-rotate setting, follow these steps:

  1. Open your device’s Settings app .
  2. Tap Accessibility.
  3. Tap Auto-rotate screen.

Which method is called when screen changes orientation in Android?

Onstop method is called when Orientation changes.

What is instance state in Android?

The savedInstanceState is a reference to a Bundle object that is passed into the onCreate method of every Android Activity. Activities have the ability, under special circumstances, to restore themselves to a previous state using the data stored in this bundle.

During which activity lifecycle method should you save any state in your application?

Save simple, lightweight UI state using onSaveInstanceState() As your activity begins to stop, the system calls the onSaveInstanceState() method so your activity can save state information to an instance state bundle.

When you change configuration to your device such as rotating from portrait to landscape what is the first process state that will be called?

onConfigurationChanged method
Checkout solution-2 branch of Git Repository. In this method, when you switch from Portrait to Landscape, a method is called, onConfigurationChanged method.

How do I stop my Android phone from rotating?

You can enable or disable auto-rotate for your home screens and unlocked apps.

  1. Tap the “Menu” button on your Android device; then touch “Settings.”
  2. Tap “Display.”
  3. Touch “Auto-Rotate Screen” to check the check box and allow the screen to change orientation as you turn it.

What is saved instance state?

How does the activity respond when the user rotates the screen?

When you rotate your device and the screen changes orientation, Android usually destroys your application’s existing Activities and Fragments and recreates them. Android does this so that your application can reload resources based on the new configuration.