Merge branch 'master' of http://www.scserverddns.top:13000/sc/SunlightAggregationTerminal

Platforms/Android/NotificationService.cs

@@ -0,0 +1,81 @@
+using Android.App;
+using Android.Content;
+using Android.OS;
+using AndroidX.Core.App;
+using SunlightAggregationTerminal;
+// 使用 global:: 强制指定原生安卓的命名空间
+using AndroidApp = global::Android.App;
+
+namespace SunlightAggregationTerminal.Platforms.Android
+{
+    public class NotificationService : INotificationService
+    {
+        const string channelId = "default_channel";
+        const string channelName = "Default Notifications";
+        const string channelDescription = "Default notification channel";
+
+        public void SendNotification(string title, string message, int notificationId = 0)
+        {
+            // 1. 创建通知渠道（仅 Android 8.0 / API 26 及以上需要）
+#pragma warning disable CA1416 // 暂时关闭平台兼容性警告
+            if (Build.VERSION.SdkInt >= BuildVersionCodes.O)
+            {
+                var channel = new AndroidApp.NotificationChannel(channelId, channelName, NotificationImportance.Default)
+                {
+                    Description = channelDescription
+                };
+
+                // 修复点：获取系统服务并处理可能的 null 值
+                // 如果 GetSystemService 返回 null，则直接 return 终止方法，防止后续崩溃
+                var notificationManager = AndroidApp.Application.Context.GetSystemService(Context.NotificationService) as AndroidApp.NotificationManager;
+                if (notificationManager == null) return;
+
+                notificationManager.CreateNotificationChannel(channel);
+            }
+#pragma warning restore CA1416 // 恢复平台兼容性警告
+
+            // 2. 构建通知内容
+            var intent = new Intent(AndroidApp.Application.Context, typeof(MainActivity));
+            intent.AddFlags(ActivityFlags.ClearTop);
+
+#pragma warning disable CA1416
+            // PendingIntent 同样建议做安全获取
+            var pendingIntent = PendingIntent.GetActivity(AndroidApp.Application.Context, 0, intent, PendingIntentFlags.Immutable | PendingIntentFlags.UpdateCurrent);
+#pragma warning restore CA1416 // 恢复平台兼容性警告
+
+            NotificationCompat.Builder notificationBuilder;
+
+            // 核心兼容处理：根据系统版本选择不同的 Builder 构造方法
+            if (Build.VERSION.SdkInt >= BuildVersionCodes.O)
+            {
+                // Android 8.0+：必须传入 channelId
+                notificationBuilder = new NotificationCompat.Builder(AndroidApp.Application.Context, channelId);
+            }
+            else
+            {
+#pragma warning disable CS0618
+                // Android 5.0 ~ 7.x：不支持 channelId，使用旧版单参数构造方法
+                notificationBuilder = new NotificationCompat.Builder(AndroidApp.Application.Context);
+#pragma warning restore CS0618
+            }
+
+            var notification = notificationBuilder!
+                .SetContentTitle(title)!
+                .SetContentText(message)!
+                // 请确保你的 Resources/drawable 文件夹下有这个图标
+                //.SetSmallIcon(Resource.Drawable.abc_vector_test)!
+                .SetAutoCancel(true)!
+                .SetContentIntent(pendingIntent);
+
+            // 如果是 Android 5.0 (API 21) 及以上，还可以设置锁屏可见等特性
+            if (Build.VERSION.SdkInt >= BuildVersionCodes.Lollipop)
+            {
+                notification!.SetVisibility(NotificationCompat.VisibilityPublic);
+            }
+
+            // 3. 发送通知
+            var compatManager = NotificationManagerCompat.From(AndroidApp.Application.Context);
+            compatManager!.Notify(notificationId, notification!.Build());
+        }
+    }
+}