Handle edge-to-edge when it's not enabled by the edgeToEdgeEnabled gradle property

Author: zoontek

packages/gradle-plugin/react-native-gradle-plugin/src/main/kotlin/com/facebook/react/tasks/GenerateEntryPointTask.kt

@@ -97,9 +97,7 @@ abstract class GenerateEntryPointTask : DefaultTask() {
               DefaultNewArchitectureEntryPoint.load();
             }
             
-            if ({{packageName}}.BuildConfig.IS_EDGE_TO_EDGE_ENABLED) {
-              WindowUtilKt.setEdgeToEdgeFeatureFlagOn();
-            }
+            WindowUtilKt.initEdgeToEdge(context, {{packageName}}.BuildConfig.IS_EDGE_TO_EDGE_ENABLED);
           }
         }
         """

packages/gradle-plugin/react-native-gradle-plugin/src/test/kotlin/com/facebook/react/tasks/GenerateEntryPointTaskTest.kt

@@ -80,9 +80,7 @@ class GenerateEntryPointTaskTest {
                   DefaultNewArchitectureEntryPoint.load();
                 }
                 
-                if (com.facebook.react.BuildConfig.IS_EDGE_TO_EDGE_ENABLED) {
-                  WindowUtilKt.setEdgeToEdgeFeatureFlagOn();
-                }
+                WindowUtilKt.initEdgeToEdge(context, com.facebook.react.BuildConfig.IS_EDGE_TO_EDGE_ENABLED);
               }
             }
             """

packages/react-native/ReactAndroid/api/ReactAndroid.api

@@ -6540,7 +6540,8 @@ public final class com/facebook/react/views/view/ReactViewManager$Companion {
 
 public final class com/facebook/react/views/view/WindowUtilKt {
 	public static final fun isEdgeToEdgeFeatureFlagOn ()Z
-	public static final fun setEdgeToEdgeFeatureFlagOn ()V
+	public static final fun isEdgeToEdge ()Z
+	public static final fun initEdgeToEdge (Landroid/content/Context;Z)V
 }
 
 public final class com/facebook/react/views/virtual/VirtualViewMode : java/lang/Enum {

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/modules/deviceinfo/DeviceInfoModule.kt

@@ -16,7 +16,7 @@ import com.facebook.react.bridge.ReadableMap
 import com.facebook.react.module.annotations.ReactModule
 import com.facebook.react.uimanager.DisplayMetricsHolder.getDisplayMetricsWritableMap
 import com.facebook.react.uimanager.DisplayMetricsHolder.initDisplayMetricsIfNotInitialized
-import com.facebook.react.views.view.isEdgeToEdgeFeatureFlagOn
+import com.facebook.react.views.view.isEdgeToEdge
 
 /** Module that exposes Android Constants to JS. */
 @ReactModule(name = NativeDeviceInfoSpec.NAME)
@@ -38,7 +38,7 @@ internal class DeviceInfoModule(reactContext: ReactApplicationContext) :
 
     return mapOf(
         "Dimensions" to displayMetrics.toHashMap(),
-        "isEdgeToEdge" to isEdgeToEdgeFeatureFlagOn,
+        "isEdgeToEdge" to isEdgeToEdge,
     )
   }
 

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/modules/statusbar/StatusBarModule.kt

@@ -23,7 +23,7 @@ import com.facebook.react.common.ReactConstants
 import com.facebook.react.module.annotations.ReactModule
 import com.facebook.react.uimanager.DisplayMetricsHolder.getStatusBarHeightPx
 import com.facebook.react.uimanager.PixelUtil
-import com.facebook.react.views.view.isEdgeToEdgeFeatureFlagOn
+import com.facebook.react.views.view.isEdgeToEdge
 import com.facebook.react.views.view.setStatusBarTranslucency
 import com.facebook.react.views.view.setStatusBarVisibility
 
@@ -56,7 +56,7 @@ internal class StatusBarModule(reactContext: ReactApplicationContext?) :
       )
       return
     }
-    if (isEdgeToEdgeFeatureFlagOn) {
+    if (isEdgeToEdge) {
       FLog.w(
           ReactConstants.TAG,
           "StatusBarModule: Ignored status bar change, current activity is edge-to-edge.",
@@ -93,7 +93,7 @@ internal class StatusBarModule(reactContext: ReactApplicationContext?) :
       )
       return
     }
-    if (isEdgeToEdgeFeatureFlagOn) {
+    if (isEdgeToEdge) {
       FLog.w(
           ReactConstants.TAG,
           "StatusBarModule: Ignored status bar change, current activity is edge-to-edge.",

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/modal/ReactModalHostView.kt

@@ -53,7 +53,7 @@ import com.facebook.react.views.common.ContextUtils
 import com.facebook.react.views.view.ReactViewGroup
 import com.facebook.react.views.view.disableEdgeToEdge
 import com.facebook.react.views.view.enableEdgeToEdge
-import com.facebook.react.views.view.isEdgeToEdgeFeatureFlagOn
+import com.facebook.react.views.view.isEdgeToEdge
 import com.facebook.react.views.view.setStatusBarTranslucency
 
 /**
@@ -81,17 +81,17 @@ public class ReactModalHostView(context: ThemedReactContext) :
   public var onRequestCloseListener: OnRequestCloseListener? = null
 
   public var statusBarTranslucent: Boolean = false
-    get() = field || isEdgeToEdgeFeatureFlagOn
+    get() = field || isEdgeToEdge
     set(value) {
       field = value
-      createNewDialog = createNewDialog || !isEdgeToEdgeFeatureFlagOn
+      createNewDialog = createNewDialog || !isEdgeToEdge
     }
 
   public var navigationBarTranslucent: Boolean = false
-    get() = field || isEdgeToEdgeFeatureFlagOn
+    get() = field || isEdgeToEdge
     set(value) {
       field = value
-      createNewDialog = createNewDialog || !isEdgeToEdgeFeatureFlagOn
+      createNewDialog = createNewDialog || !isEdgeToEdge
     }
 
   public var animationType: String? = null
@@ -428,7 +428,7 @@ public class ReactModalHostView(context: ThemedReactContext) :
       val dialogWindowInsetsController =
           WindowInsetsControllerCompat(dialogWindow, dialogWindow.decorView)
 
-      if (isEdgeToEdgeFeatureFlagOn) {
+      if (isEdgeToEdge) {
         activityWindowInsetsController.systemBarsBehavior =
             WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
         dialogWindowInsetsController.systemBarsBehavior =

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/view/WindowUtil.kt

@@ -7,6 +7,7 @@
 
 package com.facebook.react.views.view
 
+import android.content.Context
 import android.graphics.Color
 import android.os.Build
 import android.view.Window
@@ -33,8 +34,28 @@ internal val DarkNavigationBarColor = Color.argb(0x80, 0x1b, 0x1b, 0x1b)
 public var isEdgeToEdgeFeatureFlagOn: Boolean = false
   private set
 
-public fun setEdgeToEdgeFeatureFlagOn() {
-  isEdgeToEdgeFeatureFlagOn = true
+/**
+ * Whether edge-to-edge is enforced. Computed once in [initEdgeToEdge], based on:
+ * - The device is running Android 16+ (where edge-to-edge is always enforced)
+ * - The edge-to-edge feature flag has been explicitly enabled
+ * - The device is running Android 15 (API 35) without opting out
+ */
+public var isEdgeToEdge: Boolean = false
+  private set
+
+public fun initEdgeToEdge(context: Context, flag: Boolean) {
+  isEdgeToEdgeFeatureFlagOn = flag
+  isEdgeToEdge =
+      when {
+        Build.VERSION.SDK_INT >= Build.VERSION_CODES.BAKLAVA || flag -> true
+        Build.VERSION.SDK_INT < Build.VERSION_CODES.VANILLA_ICE_CREAM -> false
+        else ->
+            context.theme
+                .obtainStyledAttributes(
+                    intArrayOf(android.R.attr.windowOptOutEdgeToEdgeEnforcement)
+                )
+                .use { !it.getBoolean(0, false) }
+      }
 }
 
 @Suppress("DEPRECATION")
@@ -67,7 +88,7 @@ internal fun Window.setStatusBarVisibility(isHidden: Boolean) {
 
 @Suppress("DEPRECATION")
 private fun Window.statusBarHide() {
-  if (isEdgeToEdgeFeatureFlagOn) {
+  if (isEdgeToEdge) {
     WindowInsetsControllerCompat(this, decorView).run {
       systemBarsBehavior = WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
       hide(WindowInsetsCompat.Type.statusBars())
@@ -86,7 +107,7 @@ private fun Window.statusBarHide() {
 
 @Suppress("DEPRECATION")
 private fun Window.statusBarShow() {
-  if (isEdgeToEdgeFeatureFlagOn) {
+  if (isEdgeToEdge) {
     WindowInsetsControllerCompat(this, decorView).run {
       systemBarsBehavior = WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
       show(WindowInsetsCompat.Type.statusBars())