Is it possible to make an activity not recreated on screen rotation?

Yes, it is possible. There are two main ways.

1. Declare configChanges in the manifest: In AndroidManifest.xml, add the attribute android:configChanges="orientation|screenSize" to the <activity>.

   <activity
       android:name=".MainActivity"
       android:configChanges="orientation|screenSize" />
   

   In this case, the activity is not recreated, but the method onConfigurationChanged() is called, which should be overridden to handle configuration changes.

   override fun onConfigurationChanged(newConfig: Configuration) {
       super.onConfigurationChanged(newConfig)
       // Handle changes, for example:
       // if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
       //     // Changed to landscape orientation
       // } else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT) {
       //     // Changed to portrait orientation
       // }
   }
   

2. Fix the screen orientation: You can set a fixed orientation for the activity by adding the attribute android:screenOrientation in the manifest.

   <activity
       android:name=".MainActivity"
       android:screenOrientation="portrait" />
   

   or

   <activity  
       android:name=".MainActivity"  
       android:screenOrientation="landscape" />
   

   In this case, the activity's orientation will not change regardless of device rotation, and it will not be recreated.