Fix a crash when application put to background restriction

stream-video-android-core/src/main/kotlin/io/getstream/video/android/core/notifications/handlers/StreamDefaultNotificationHandler.kt

@@ -59,6 +59,7 @@ import io.getstream.video.android.core.notifications.extractor.DefaultNotificati
 import io.getstream.video.android.core.notifications.internal.service.CallService.Companion.TRIGGER_INCOMING_CALL
 import io.getstream.video.android.core.notifications.internal.service.ServiceLauncher
 import io.getstream.video.android.core.notifications.style.StyleProvider
+import io.getstream.video.android.core.utils.BackgroundRestrictions
 import io.getstream.video.android.core.utils.isAppInForeground
 import io.getstream.video.android.core.utils.safeCall
 import io.getstream.video.android.model.StreamCallId
@@ -150,6 +151,7 @@ constructor(
     private val logger by taggedLogger("Video:StreamNotificationHandler")
     private val serviceLauncher = ServiceLauncher(application)
     private val styleProvider = StyleProvider(application)
+    private val batteryRestrictions = BackgroundRestrictions(application)
 
     internal fun shouldShowIncomingCallNotification(
         callBusyHandler: CallBusyHandler,
@@ -1091,7 +1093,12 @@ constructor(
         logger.d {
             "[addHangUpAction] Adding hang up action for $callDisplayName (remoteParticipantCount=$remoteParticipantCount)"
         }
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+        /**
+         * CallStyle notifications can trigger
+         * CannotPostForegroundServiceNotificationException ("Bad notification for startForeground")
+         * on Android 12+ when the app is background-restricted. Fall back to a standard notification.
+         */
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S && !batteryRestrictions.isRestricted()) {
             setStyle(
                 styleProvider.getOutgoingCallStyle(
                     callDisplayName,
@@ -1110,7 +1117,12 @@ constructor(
         callDisplayName: String?,
     ): NotificationCompat.Builder = apply {
         logger.d { "[addCallActions] callDisplayName: $callDisplayName" }
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+        /**
+         * CallStyle notifications can trigger
+         * CannotPostForegroundServiceNotificationException ("Bad notification for startForeground")
+         * on Android 12+ when the app is background-restricted. Fall back to a standard notification.
+         */
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S && !batteryRestrictions.isRestricted()) {
             setStyle(
                 styleProvider.getIncomingCallStyle(
                     callDisplayName,

stream-video-android-core/src/main/kotlin/io/getstream/video/android/core/utils/BackgroundRestrictions.kt

@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2014-2026 Stream.io Inc. All rights reserved.
+ *
+ * Licensed under the Stream License;
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    https://github.com/GetStream/stream-video-android/blob/main/LICENSE
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.getstream.video.android.core.utils
+
+import android.app.ActivityManager
+import android.content.Context
+import android.os.Build
+
+internal class BackgroundRestrictions(private val context: Context) {
+
+    fun isRestricted(): Boolean {
+        val am = context.getSystemService(ActivityManager::class.java)
+        return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
+            am.isBackgroundRestricted ?: false
+        } else {
+            false
+        }
+    }
+}