MainActivity.kt

package com.spotlightexample

import android.os.Build
import android.os.Bundle
import android.view.View
import android.view.WindowInsetsController

import com.facebook.react.ReactActivity
import com.facebook.react.ReactActivityDelegate
import com.facebook.react.defaults.DefaultNewArchitectureEntryPoint.fabricEnabled
import com.facebook.react.defaults.DefaultReactActivityDelegate

class MainActivity : ReactActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(null)

        val window = window

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
            // Edge-to-edge for Android 11+
            window.setDecorFitsSystemWindows(false)
            val controller = window.insetsController
            controller?.systemBarsBehavior =
                WindowInsetsController.BEHAVIOR_SHOW_BARS_BY_SWIPE
        } else {
            // Edge-to-edge for older versions
            @Suppress("DEPRECATION")
            window.decorView.systemUiVisibility = (
                View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                        or View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                        or View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
            )
        }
    }

  /**
   * Returns the name of the main component registered from JavaScript. This is used to schedule
   * rendering of the component.
   */
  override fun getMainComponentName(): String = "SpotlightExample"

  /**
   * Returns the instance of the [ReactActivityDelegate]. We use [DefaultReactActivityDelegate]
   * which allows you to enable New Architecture with a single boolean flags [fabricEnabled]
   */
  override fun createReactActivityDelegate(): ReactActivityDelegate =
      DefaultReactActivityDelegate(this, mainComponentName, fabricEnabled)
}