Fix broadcast receiver register on android 14.0/34+

src/Essentials/src/Battery/Battery.android.cs

@@ -19,7 +19,7 @@ partial class BatteryImplementation : IBattery
 		void StartEnergySaverListeners()
 		{
 			powerReceiver = new EnergySaverBroadcastReceiver(OnEnergySaverChanged);
-			Application.Context.RegisterReceiver(powerReceiver, new IntentFilter(PowerManager.ActionPowerSaveModeChanged));
+			PlatformUtils.RegisterBroadcastReceiver(powerReceiver, new IntentFilter(PowerManager.ActionPowerSaveModeChanged), false);
 		}
 
 		void StopEnergySaverListeners()
@@ -50,7 +50,7 @@ void StartBatteryListeners()
 			Permissions.EnsureDeclared<Permissions.Battery>();
 
 			batteryReceiver = new BatteryBroadcastReceiver(OnBatteryInfoChanged);
-			Application.Context.RegisterReceiver(batteryReceiver, new IntentFilter(Intent.ActionBatteryChanged));
+			PlatformUtils.RegisterBroadcastReceiver(batteryReceiver, new IntentFilter(Intent.ActionBatteryChanged), false);
 		}
 
 		void StopBatteryListeners()
@@ -74,7 +74,7 @@ public double ChargeLevel
 				Permissions.EnsureDeclared<Permissions.Battery>();
 
 				using (var filter = new IntentFilter(Intent.ActionBatteryChanged))
-				using (var battery = Application.Context.RegisterReceiver(null, filter))
+				using (var battery = PlatformUtils.RegisterBroadcastReceiver(null, filter, false))
 				{
 					var level = battery.GetIntExtra(BatteryManager.ExtraLevel, -1);
 					var scale = battery.GetIntExtra(BatteryManager.ExtraScale, -1);
@@ -94,7 +94,7 @@ public BatteryState State
 				Permissions.EnsureDeclared<Permissions.Battery>();
 
 				using (var filter = new IntentFilter(Intent.ActionBatteryChanged))
-				using (var battery = Application.Context.RegisterReceiver(null, filter))
+				using (var battery = PlatformUtils.RegisterBroadcastReceiver(null, filter, false))
 				{
 					var status = battery.GetIntExtra(BatteryManager.ExtraStatus, -1);
 					switch (status)
@@ -121,7 +121,7 @@ public BatteryPowerSource PowerSource
 				Permissions.EnsureDeclared<Permissions.Battery>();
 
 				using (var filter = new IntentFilter(Intent.ActionBatteryChanged))
-				using (var battery = Application.Context.RegisterReceiver(null, filter))
+				using (var battery = PlatformUtils.RegisterBroadcastReceiver(null, filter, false))
 				{
 					var chargePlug = battery.GetIntExtra(BatteryManager.ExtraPlugged, -1);
 

src/Essentials/src/Connectivity/Connectivity.android.cs

@@ -45,7 +45,7 @@ void StartListeners()
 
 			conectivityReceiver = new ConnectivityBroadcastReceiver(OnConnectivityChanged);
 
-			Application.Context.RegisterReceiver(conectivityReceiver, filter);
+			PlatformUtils.RegisterBroadcastReceiver(conectivityReceiver, filter, false);
 		}
 
 		void StopListeners()

src/Essentials/src/Platform/PlatformUtils.android.cs

@@ -1,3 +1,4 @@
+#nullable enable
 using System;
 using Android.App;
 using Android.Content;
@@ -25,13 +26,28 @@ internal static int NextRequestCode()
 			return requestCode;
 		}
 
+		internal static Intent? RegisterBroadcastReceiver(BroadcastReceiver? receiver, IntentFilter filter, bool exported)
+		{
+#if ANDROID34_0_OR_GREATER
+			if (OperatingSystem.IsAndroidVersionAtLeast(34))
+			{
+				var flags = exported ? ReceiverFlags.Exported : ReceiverFlags.NotExported;
+				return Application.Context.RegisterReceiver(receiver, filter, flags);
+			}
+#endif
+			return Application.Context.RegisterReceiver(receiver, filter);
+		}
+
 		internal static bool HasSystemFeature(string systemFeature)
 		{
 			var packageManager = Application.Context.PackageManager;
-			foreach (var feature in packageManager.GetSystemAvailableFeatures())
+			if (packageManager is not null)
 			{
-				if (feature?.Name?.Equals(systemFeature, StringComparison.OrdinalIgnoreCase) ?? false)
-					return true;
+				foreach (var feature in packageManager.GetSystemAvailableFeatures())
+				{
+					if (feature?.Name?.Equals(systemFeature, StringComparison.OrdinalIgnoreCase) ?? false)
+						return true;
+				}
 			}
 			return false;
 		}
@@ -51,38 +67,5 @@ internal static bool IsIntentSupported(Intent intent, string expectedPackageName
 
 			return intent.ResolveActivity(pm) is ComponentName c && c.PackageName == expectedPackageName;
 		}
-
-		internal static Java.Util.Locale GetLocale()
-		{
-			var resources = Application.Context.Resources;
-			var config = resources.Configuration;
-
-#if __ANDROID_24__
-			if (OperatingSystem.IsAndroidVersionAtLeast(24))
-				return config.Locales.Get(0);
-#endif
-
-#pragma warning disable CS0618 // Type or member is obsolete
-			return config.Locale;
-#pragma warning restore CS0618 // Type or member is obsolete
-		}
-
-		internal static void SetLocale(Java.Util.Locale locale)
-		{
-			Java.Util.Locale.Default = locale;
-			var resources = Application.Context.Resources;
-			var config = resources.Configuration;
-#pragma warning disable CS0618 // Type or member is obsolete
-#pragma warning disable CA1422 // Validate platform compatibility
-#pragma warning disable CA1416 // Validate platform compatibility
-			if (OperatingSystem.IsAndroidVersionAtLeast(24))
-				config.SetLocale(locale);
-			else
-				config.Locale = locale;
-			resources.UpdateConfiguration(config, resources.DisplayMetrics);
-#pragma warning restore CA1422 // Validate platform compatibility
-#pragma warning restore CA1416 // Validate platform compatibility
-#pragma warning restore CS0618 // Type or member is obsolete
-		}
 	}
 }

src/Essentials/test/DeviceTests/Tests/Battery_Tests.cs

@@ -1,4 +1,5 @@
 using Microsoft.Maui.Devices;
+using System.Threading.Tasks;
 using Xunit;
 
 namespace Microsoft.Maui.Essentials.DeviceTests
@@ -53,5 +54,37 @@ public void App_Is_Not_Lower_Power_mode()
 		{
 			Assert.Equal(EnergySaverStatus.Off, Battery.EnergySaverStatus);
 		}
+
+		[Fact]
+		public async Task EnergySaverStatusChanged_Does_Not_Crash()
+		{
+			Battery.EnergySaverStatusChanged += Battery_EnergySaverStatusChanged;
+
+			// just ensure there is no need for the OS to "respond" to a new subscription
+			await Task.Delay(1000);
+
+			Battery.EnergySaverStatusChanged -= Battery_EnergySaverStatusChanged;
+
+			static void Battery_EnergySaverStatusChanged(object sender, EnergySaverStatusChangedEventArgs e)
+			{
+				// do nothing
+			}
+		}
+
+		[Fact]
+		public async Task BatteryInfoChanged_Does_Not_Crash()
+		{
+			Battery.BatteryInfoChanged += Battery_BatteryInfoChanged;
+
+			// just ensure there is no need for the OS to "respond" to a new subscription
+			await Task.Delay(1000);
+
+			Battery.BatteryInfoChanged -= Battery_BatteryInfoChanged;
+
+			static void Battery_BatteryInfoChanged(object sender, BatteryInfoChangedEventArgs e)
+			{
+				// do nothing
+			}
+		}
 	}
 }

src/Essentials/test/DeviceTests/Tests/Connectivity_Tests.cs

@@ -23,6 +23,22 @@ public void Distict_Connection_Profiles()
 			Assert.Equal(profiles.Count(), profiles.Distinct().Count());
 		}
 
+		[Fact]
+		public async Task ConnectivityChanged_Does_Not_Crash()
+		{
+			Connectivity.ConnectivityChanged += Connectivity_ConnectivityChanged;
+
+			// just ensure there is no need for the OS to "respond" to a new subscription
+			await Task.Delay(1000);
+
+			Connectivity.ConnectivityChanged -= Connectivity_ConnectivityChanged;
+
+			static void Connectivity_ConnectivityChanged(object sender, ConnectivityChangedEventArgs e)
+			{
+				// do nothing
+			}
+		}
+
 		[Fact]
 		public async Task Test()
 		{