[Fix] "could not be instantiated" exception when; some modules are omitted AND android.enableR8.fullMode=true

OneSignalSDK/onesignal/core/consumer-rules.pro

@@ -14,4 +14,6 @@
 
 -keepclassmembers class com.onesignal.common.** { *; }
 
--keep class ** implements com.onesignal.common.modules.IModule { *; }
+-keepclassmembers @com.onesignal.core.internal.minification.KeepStub class * { <init>(...); }
+
+-keep class ** implements com.onesignal.common.modules.IModule { *; }

OneSignalSDK/onesignal/core/src/main/java/com/onesignal/core/internal/minification/KeepStub.kt

@@ -0,0 +1,8 @@
+package com.onesignal.core.internal.minification
+
+/**
+ * Purpose: Use on stub classes that are expected to always exists when
+ * aggressive minification is enabled on the app.
+ *     - Such as android.enableR8.fullMode.
+ */
+annotation class KeepStub

OneSignalSDK/onesignal/core/src/main/java/com/onesignal/inAppMessages/internal/MisconfiguredIAMManager.kt

@@ -1,13 +1,15 @@
 package com.onesignal.inAppMessages.internal
 
+import com.onesignal.core.internal.minification.KeepStub
 import com.onesignal.inAppMessages.IInAppMessageClickListener
 import com.onesignal.inAppMessages.IInAppMessageLifecycleListener
 import com.onesignal.inAppMessages.IInAppMessagesManager
 
 /**
- * The misconfigured IAMManager is an implementation of [IInAppMessagesManager] that warns the user they
- * have not included the appropriate IAM module.
+ * The misconfigured IAMManager is an implementation of [IInAppMessagesManager]
+ * that warns the dev they have not included the appropriate IAM module.
  */
+@KeepStub
 internal class MisconfiguredIAMManager : IInAppMessagesManager {
     override var paused: Boolean
         get() = throw EXCEPTION
@@ -35,7 +37,7 @@ internal class MisconfiguredIAMManager : IInAppMessagesManager {
     override fun removeClickListener(listener: IInAppMessageClickListener) = throw EXCEPTION
 
     companion object {
-        private val EXCEPTION: Throwable get() =
+        private val EXCEPTION get() =
             Exception(
                 "Must include gradle module com.onesignal:InAppMessages in order to use this functionality!",
             )

OneSignalSDK/onesignal/core/src/main/java/com/onesignal/location/internal/MisconfiguredLocationManager.kt

@@ -1,19 +1,21 @@
 package com.onesignal.location.internal
 
+import com.onesignal.core.internal.minification.KeepStub
 import com.onesignal.location.ILocationManager
 
 /**
- * The misconfigured IAMManager is an implementation of [ILocationManager] that warns the user they
+ * The misconfigured IAMManager is an implementation of [ILocationManager] that warns the dev they
  * have not included the appropriate location module.
  */
+@KeepStub
 internal class MisconfiguredLocationManager : ILocationManager {
     override var isShared: Boolean
         get() = throw EXCEPTION
         set(value) = throw EXCEPTION
 
-    override suspend fun requestPermission(): Boolean = throw EXCEPTION
+    override suspend fun requestPermission() = throw EXCEPTION
 
     companion object {
-        private val EXCEPTION = Exception("Must include gradle module com.onesignal:Location in order to use this functionality!")
+        private val EXCEPTION get() = Exception("Must include gradle module com.onesignal:Location in order to use this functionality!")
     }
 }

OneSignalSDK/onesignal/core/src/main/java/com/onesignal/notifications/internal/MisconfiguredNotificationsManager.kt

@@ -1,21 +1,24 @@
 package com.onesignal.notifications.internal
 
+import com.onesignal.core.internal.minification.KeepStub
 import com.onesignal.notifications.INotificationClickListener
 import com.onesignal.notifications.INotificationLifecycleListener
 import com.onesignal.notifications.INotificationsManager
 import com.onesignal.notifications.IPermissionObserver
 
 /**
- * The misconfigured NotificationsManager is an implementation of [INotificationsManager] that warns the user they
- * have not included the appropriate notifications module.
+ * The misconfigured NotificationsManager is an implementation of
+ * [INotificationsManager] that warns the dev they have not included the
+ * appropriate notifications module.
  */
+@KeepStub
 internal class MisconfiguredNotificationsManager : INotificationsManager {
-    override val permission: Boolean
+    override val permission
         get() = throw EXCEPTION
-    override val canRequestPermission: Boolean
+    override val canRequestPermission
         get() = throw EXCEPTION
 
-    override suspend fun requestPermission(fallbackToSettings: Boolean): Boolean = throw EXCEPTION
+    override suspend fun requestPermission(fallbackToSettings: Boolean) = throw EXCEPTION
 
     override fun removeNotification(id: Int) = throw EXCEPTION
 
@@ -36,6 +39,6 @@ internal class MisconfiguredNotificationsManager : INotificationsManager {
     override fun removeClickListener(listener: INotificationClickListener) = throw EXCEPTION
 
     companion object {
-        private val EXCEPTION = Exception("Must include gradle module com.onesignal:Notification in order to use this functionality!")
+        private val EXCEPTION get() = Exception("Must include gradle module com.onesignal:Notification in order to use this functionality!")
     }
 }