Support native alert suppression on Android 14 and 15

app/src/main/java/se/ajpanton/notificationsmaster/module/NotificationAttentionBridge.kt

@@ -6,21 +6,13 @@ import android.util.Log
 import io.github.libxposed.api.XposedInterface
 import java.lang.reflect.Method
 
-/**
- * API 36's standard channel-attention boundary. It deliberately leaves the
- * notification itself untouched.
- */
+/** Version-specific native-alert boundary with one shared policy decision. */
 internal class NotificationAttentionBridge(
     private val framework: XposedInterface,
     private val observer: (SystemNotificationEvent) -> Unit,
 ) {
     fun install(classLoader: ClassLoader) {
-        if (Build.VERSION.SDK_INT != 36) return
-        val helperClass = runCatching { Class.forName(ATTENTION_HELPER, false, classLoader) }.getOrNull() ?: run {
-            Log.w(TAG, "Notification attention helper was not found; leaving Android unchanged")
-            return
-        }
-        val method = helperClass.declaredMethods.singleOrNull(::isSupportedAttention) ?: run {
+        val method = attentionMethod(classLoader) ?: run {
             Log.w(TAG, "Notification attention method shape was not found; leaving Android unchanged")
             return
         }
@@ -35,9 +27,23 @@ internal class NotificationAttentionBridge(
                 chain.proceed()
             }
         }
-        Log.i(TAG, "Installed API 36 notification attention bridge")
+        Log.i(TAG, "Installed API " + Build.VERSION.SDK_INT + " notification attention bridge")
     }
 
+    private fun attentionMethod(classLoader: ClassLoader): Method? = when (Build.VERSION.SDK_INT) {
+        34 -> findMethod(classLoader, NOTIFICATION_MANAGER_SERVICE, ::isApi34Attention)
+        35, 36 -> findMethod(classLoader, ATTENTION_HELPER, ::isApi35PlusAttention)
+        else -> null
+    }
+
+    private fun findMethod(
+        classLoader: ClassLoader,
+        className: String,
+        matches: (Method) -> Boolean,
+    ): Method? = runCatching {
+        Class.forName(className, false, classLoader).declaredMethods.singleOrNull(matches)
+    }.getOrNull()
+
     private fun eventFrom(record: Any?): SystemNotificationEvent? = runCatching {
         val sbn = record?.javaClass?.getMethod("getSbn")?.invoke(record) as? StatusBarNotification ?: return null
         SystemNotificationEvent.fromStatusBarNotification(sbn)
@@ -46,12 +52,20 @@ internal class NotificationAttentionBridge(
     private companion object {
         const val TAG = "NotificationsMaster"
         const val ATTENTION_HELPER = "com.android.server.notification.NotificationAttentionHelper"
+        const val NOTIFICATION_MANAGER_SERVICE = "com.android.server.notification.NotificationManagerService"
+        const val NOTIFICATION_RECORD = "com.android.server.notification.NotificationRecord"
 
-        fun isSupportedAttention(method: Method): Boolean =
+        fun isApi34Attention(method: Method): Boolean =
+            method.name == "buzzBeepBlinkLocked" &&
+                method.returnType == Int::class.javaPrimitiveType &&
+                method.parameterTypes.size == 1 &&
+                method.parameterTypes[0].name == NOTIFICATION_RECORD
+
+        fun isApi35PlusAttention(method: Method): Boolean =
             method.name == "buzzBeepBlinkLocked" &&
                 method.returnType == Int::class.javaPrimitiveType &&
                 method.parameterTypes.size == 2 &&
-                method.parameterTypes[0].name == "com.android.server.notification.NotificationRecord" &&
+                method.parameterTypes[0].name == NOTIFICATION_RECORD &&
                 method.parameterTypes[1].name.endsWith("NotificationAttentionHelper\$Signals")
     }
 }

test-helper/src/main/AndroidManifest.xml

@@ -1 +1,17 @@
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"><uses-permission android:name="android.permission.POST_NOTIFICATIONS"/><application android:theme="@style/Theme.AppCompat.DayNight"><activity android:name=".MainActivity" android:exported="true" android:launchMode="singleTop"><intent-filter><action android:name="android.intent.action.MAIN"/><category android:name="android.intent.category.LAUNCHER"/></intent-filter></activity></application></manifest>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+
+    <application android:theme="@style/Theme.AppCompat.DayNight">
+        <activity android:name=".MainActivity" android:exported="true" android:launchMode="singleTop">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+        <receiver android:name=".BackgroundPostReceiver" android:exported="true">
+            <intent-filter>
+                <action android:name="se.ajpanton.notificationsmaster.helper.POST_TEXT" />
+            </intent-filter>
+        </receiver>
+    </application>
+</manifest>

test-helper/src/main/java/se/ajpanton/notificationsmaster/helper/BackgroundPostReceiver.kt

@@ -0,0 +1,39 @@
+package se.ajpanton.notificationsmaster.helper
+
+import android.app.Notification
+import android.app.NotificationChannel
+import android.app.NotificationManager
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.media.AudioAttributes
+import android.media.RingtoneManager
+
+/** Posts an alerting test notification without bringing the helper activity forward. */
+class BackgroundPostReceiver : BroadcastReceiver() {
+    override fun onReceive(context: Context, intent: Intent) {
+        if (intent.action != ACTION) return
+        val manager = context.getSystemService(NotificationManager::class.java)
+        manager.createNotificationChannel(
+            NotificationChannel(CHANNEL, "Test", NotificationManager.IMPORTANCE_HIGH).apply {
+                setSound(
+                    RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION),
+                    AudioAttributes.Builder().setUsage(AudioAttributes.USAGE_NOTIFICATION).build(),
+                )
+                enableVibration(true)
+                vibrationPattern = longArrayOf(0, 200)
+            },
+        )
+        manager.notify(ID, Notification.Builder(context, CHANNEL)
+            .setSmallIcon(android.R.drawable.ic_dialog_info)
+            .setContentTitle("Helper")
+            .setContentText("Text message")
+            .build())
+    }
+
+    companion object {
+        const val ACTION = "se.ajpanton.notificationsmaster.helper.POST_TEXT"
+        private const val CHANNEL = "test"
+        private const val ID = 1
+    }
+}