Add built-in debug notification generator

app/src/main/AndroidManifest.xml

@@ -4,6 +4,7 @@
     <uses-permission android:name="android.permission.USE_BIOMETRIC" />
     <uses-permission android:name="android.permission.VIBRATE" />
     <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
     <uses-permission android:name="se.ajpanton.notificationsmaster.permission.UPDATE_ALERT_POLICY" />
 
     <permission

app/src/main/java/se/ajpanton/notificationsmaster/AlertStatusFragment.kt

@@ -1,21 +1,55 @@
 package se.ajpanton.notificationsmaster
 
+import android.Manifest
 import android.content.ComponentName
 import android.content.Intent
 import android.os.Bundle
 import android.provider.Settings
 import android.view.View
+import android.widget.Toast
+import androidx.activity.result.contract.ActivityResultContracts
 import androidx.fragment.app.Fragment
 import se.ajpanton.notificationsmaster.alerts.AlertConfigurationStore
 import se.ajpanton.notificationsmaster.capture.NotificationCaptureService
 import se.ajpanton.notificationsmaster.databinding.FragmentAlertStatusBinding
+import se.ajpanton.notificationsmaster.debug.DebugNotifications
 
 class AlertStatusFragment : Fragment(R.layout.fragment_alert_status) {
     private var binding: FragmentAlertStatusBinding? = null
+    private var pendingCount: Int? = null
+    private var pendingCycle = false
+    private var updatingCycle = false
+    private val permissionRequest = registerForActivityResult(ActivityResultContracts.RequestPermission()) { granted ->
+        val context = context ?: return@registerForActivityResult
+        if (granted) {
+            pendingCount?.let { DebugNotifications.setCount(context, it) }
+            if (pendingCycle) DebugNotifications.setCycling(context, true)
+            refreshDebugControls()
+        } else {
+            Toast.makeText(context, R.string.debug_notification_permission_required, Toast.LENGTH_SHORT).show()
+            refreshDebugControls()
+        }
+        pendingCount = null
+        pendingCycle = false
+    }
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         binding = FragmentAlertStatusBinding.bind(view)
         binding!!.notificationAccess.setOnClickListener { startActivity(Intent(Settings.ACTION_NOTIFICATION_LISTENER_SETTINGS)) }
+        binding!!.debugMinus10.setOnClickListener { changeDebugCount(-10) }
+        binding!!.debugMinus1.setOnClickListener { changeDebugCount(-1) }
+        binding!!.debugPlus1.setOnClickListener { changeDebugCount(1) }
+        binding!!.debugPlus10.setOnClickListener { changeDebugCount(10) }
+        binding!!.debugReset.setOnClickListener { setDebugCount(0) }
+        binding!!.debugCycle.setOnCheckedChangeListener { _, enabled ->
+            if (updatingCycle) return@setOnCheckedChangeListener
+            if (enabled && !DebugNotifications.hasPermission(requireContext())) {
+                pendingCycle = true
+                permissionRequest.launch(Manifest.permission.POST_NOTIFICATIONS)
+            } else {
+                DebugNotifications.setCycling(requireContext(), enabled)
+            }
+        }
     }
 
     override fun onResume() {
@@ -32,6 +66,31 @@ class AlertStatusFragment : Fragment(R.layout.fragment_alert_status) {
             append(if (config.rules.count { it.enabled } == 1) "." else "s.")
         }
         binding?.notificationAccess?.text = if (access) "Notification access enabled" else "Enable notification access"
+        DebugNotifications.apply(context)
+        refreshDebugControls()
+    }
+
+    private fun changeDebugCount(delta: Int) = setDebugCount(DebugNotifications.count(requireContext()) + delta)
+
+    private fun setDebugCount(count: Int) {
+        val desired = count.coerceIn(0, DebugNotifications.MAX_COUNT)
+        if (desired > 0 && !DebugNotifications.hasPermission(requireContext())) {
+            pendingCount = desired
+            permissionRequest.launch(Manifest.permission.POST_NOTIFICATIONS)
+            return
+        }
+        DebugNotifications.setCount(requireContext(), desired)
+        refreshDebugControls()
+    }
+
+    private fun refreshDebugControls() {
+        val context = context ?: return
+        val count = DebugNotifications.count(context)
+        binding?.debugCount?.text = count.toString()
+        binding?.debugCycle?.isEnabled = count > 0
+        updatingCycle = true
+        binding?.debugCycle?.isChecked = DebugNotifications.isCycling(context)
+        updatingCycle = false
     }
 
     override fun onDestroyView() { binding = null; super.onDestroyView() }

app/src/main/java/se/ajpanton/notificationsmaster/capture/NotificationCaptureService.kt

@@ -16,6 +16,7 @@ import se.ajpanton.notificationsmaster.alerts.AndroidAlertEffectPlayer
 import se.ajpanton.notificationsmaster.module.AlertPolicySync
 import se.ajpanton.notificationsmaster.data.EncryptedNotificationLogStore
 import se.ajpanton.notificationsmaster.data.EncryptedImageStore
+import se.ajpanton.notificationsmaster.debug.DebugNotifications
 import se.ajpanton.notificationsmaster.model.NotificationAction
 import se.ajpanton.notificationsmaster.model.NotificationLogEntry
 import se.ajpanton.notificationsmaster.settings.LoggingRuleStore
@@ -59,6 +60,7 @@ class NotificationCaptureService : NotificationListenerService() {
         super.onListenerConnected()
         AlertPolicySync.publishPlaybackState(this, true)
         getActiveNotifications()?.forEach { sbn ->
+            if (DebugNotifications.isManaged(this, sbn)) return@forEach
             val snapshot = NotificationContents.snapshot(sbn)
             SeenApps.markSeen(snapshot.packageName)
             activeNotifications[snapshot.key] = snapshot
@@ -73,6 +75,7 @@ class NotificationCaptureService : NotificationListenerService() {
     }
 
     override fun onNotificationPosted(sbn: StatusBarNotification) {
+        if (DebugNotifications.isManaged(this, sbn)) return
         val snapshot = NotificationContents.snapshot(sbn)
         SeenApps.markSeen(snapshot.packageName)
         val previous = activeNotifications.put(snapshot.key, snapshot)
@@ -108,6 +111,7 @@ class NotificationCaptureService : NotificationListenerService() {
         rankingMap: RankingMap,
         reason: Int,
     ) {
+        if (DebugNotifications.isManaged(this, sbn)) return
         val snapshot = activeNotifications.remove(sbn.key) ?: NotificationContents.snapshot(sbn)
         SeenApps.markSeen(snapshot.packageName)
         record(snapshot, actionForRemoval(reason), LoggingType.DISAPPEARING, includeContents = false)

app/src/main/java/se/ajpanton/notificationsmaster/debug/DebugNotifications.kt

@@ -0,0 +1,212 @@
+package se.ajpanton.notificationsmaster.debug
+
+import android.app.Notification
+import android.app.NotificationChannel
+import android.app.NotificationManager
+import android.app.PendingIntent
+import android.content.Context
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.graphics.Bitmap
+import android.graphics.Canvas
+import android.graphics.Color
+import android.graphics.Paint
+import android.graphics.Rect
+import android.graphics.drawable.Icon
+import android.os.Handler
+import android.os.Looper
+import android.os.SystemClock
+import android.service.notification.StatusBarNotification
+import se.ajpanton.notificationsmaster.MainActivity
+import kotlin.math.abs
+
+/** Posts real, silent notifications for testing icon filtering and layout. */
+object DebugNotifications {
+    const val EXTRA_DEBUG = "se.ajpanton.notificationsmaster.DEBUG_NOTIFICATION"
+    const val MAX_COUNT = 50
+
+    private const val PREFS = "debug_notifications"
+    private const val KEY_COUNT = "count"
+    private const val KEY_CYCLE = "cycle"
+    private const val KEY_CURRENT = "current"
+    private const val KEY_DIRECTION = "direction"
+    private const val KEY_BOOT_EPOCH = "boot_epoch"
+    private const val KEY_RECOVERY_USED = "recovery_used"
+    private const val CHANNEL_ID = "debug_notification_icons"
+    private const val ID_BASE = 20_000
+    private const val GROUP_PREFIX = "notifications_master_debug_"
+    private const val CYCLE_DELAY = 2_000L
+    private const val RECOVERY_DELAY = 3_500L
+    private val handler = Handler(Looper.getMainLooper())
+    private var cycleTask: Runnable? = null
+    private var recoveryTask: Runnable? = null
+
+    fun count(context: Context) = prefs(context).getInt(KEY_COUNT, 0).coerceIn(0, MAX_COUNT)
+
+    fun isCycling(context: Context) = prefs(context).getBoolean(KEY_CYCLE, false)
+
+    fun hasPermission(context: Context) =
+        context.checkSelfPermission(android.Manifest.permission.POST_NOTIFICATIONS) == PackageManager.PERMISSION_GRANTED
+
+    fun setCount(context: Context, count: Int) {
+        prefs(context).edit()
+            .putInt(KEY_COUNT, count.coerceIn(0, MAX_COUNT))
+            .putBoolean(KEY_RECOVERY_USED, false)
+            .apply()
+        apply(context)
+    }
+
+    fun setCycling(context: Context, enabled: Boolean) {
+        prefs(context).edit()
+            .putBoolean(KEY_CYCLE, enabled)
+            .putInt(KEY_CURRENT, 0)
+            .putInt(KEY_DIRECTION, 1)
+            .putBoolean(KEY_RECOVERY_USED, false)
+            .apply()
+        apply(context)
+    }
+
+    fun apply(context: Context) {
+        val app = context.applicationContext
+        val prefs = prefs(app)
+        resetRecoveryAfterBoot(prefs)
+        val configured = count(app)
+        val desired = if (isCycling(app)) prefs.getInt(KEY_CURRENT, 0).coerceIn(0, configured) else configured
+        val manager = app.getSystemService(NotificationManager::class.java)
+        cancelAbove(app, manager, desired)
+        if (hasPermission(app)) {
+            ensureChannel(manager)
+            repeat(desired) { manager.notify(ID_BASE + it + 1, notification(app, it + 1)) }
+            scheduleRecovery(app, desired)
+        }
+        scheduleCycle(app, configured)
+    }
+
+    fun isDebug(notification: Notification) = notification.extras?.getBoolean(EXTRA_DEBUG, false) == true
+
+    fun isManaged(context: Context, sbn: StatusBarNotification) =
+        sbn.packageName == context.packageName && (
+            isDebug(sbn.notification) || sbn.id in (ID_BASE + 1)..(ID_BASE + MAX_COUNT) ||
+                (count(context) > 0 && sbn.notification.flags and Notification.FLAG_GROUP_SUMMARY != 0)
+            )
+
+    private fun notification(context: Context, number: Int): Notification {
+        val intent = Intent(context, MainActivity::class.java)
+        val pending = PendingIntent.getActivity(
+            context,
+            0,
+            intent,
+            PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE,
+        )
+        return Notification.Builder(context, CHANNEL_ID)
+            .setSmallIcon(numberIcon(context, number))
+            .setContentTitle("Debug icon $number")
+            .setContentText("Notifications Master")
+            .setContentIntent(pending)
+            .setShowWhen(false)
+            .setOngoing(true)
+            .setOnlyAlertOnce(true)
+            .setCategory(Notification.CATEGORY_STATUS)
+            .setGroup("$GROUP_PREFIX$number")
+            .setSortKey(number.toString().padStart(2, '0'))
+            .setShortcutId("$GROUP_PREFIX$number")
+            .addExtras(android.os.Bundle().apply {
+                putBoolean(EXTRA_DEBUG, true)
+                putInt("number", number)
+            })
+            .build()
+            .apply { flags = flags or Notification.FLAG_NO_CLEAR or Notification.FLAG_ONGOING_EVENT }
+    }
+
+    private fun numberIcon(context: Context, number: Int): Icon {
+        val size = (48 * context.resources.displayMetrics.density + 0.5f).toInt()
+        val bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888)
+        val canvas = Canvas(bitmap)
+        val background = Paint(Paint.ANTI_ALIAS_FLAG).apply {
+            color = Color.HSVToColor(floatArrayOf(number * 37f % 360f, 0.6f, 0.9f))
+        }
+        canvas.drawRect(0f, 0f, size.toFloat(), size.toFloat(), background)
+        val label = number.toString()
+        val text = Paint(Paint.ANTI_ALIAS_FLAG).apply {
+            color = Color.WHITE
+            textAlign = Paint.Align.CENTER
+            isFakeBoldText = true
+            textSize = size * if (label.length > 1) 0.45f else 0.6f
+        }
+        val bounds = Rect().also { text.getTextBounds(label, 0, label.length, it) }
+        canvas.drawText(label, size / 2f, size / 2f - bounds.exactCenterY(), text)
+        return Icon.createWithBitmap(bitmap)
+    }
+
+    private fun ensureChannel(manager: NotificationManager) {
+        manager.createNotificationChannel(
+            NotificationChannel(CHANNEL_ID, "Debug notification icons", NotificationManager.IMPORTANCE_LOW).apply {
+                description = "Silent notification icons used to test layouts"
+                setShowBadge(false)
+                lockscreenVisibility = Notification.VISIBILITY_PUBLIC
+            },
+        )
+    }
+
+    private fun cancelAbove(context: Context, manager: NotificationManager, desired: Int) {
+        manager.activeNotifications.filter { it.packageName == context.packageName }.forEach { sbn ->
+            val number = sbn.id - ID_BASE
+            if (number in 1..MAX_COUNT && number > desired) cancel(manager, sbn)
+        }
+    }
+
+    private fun scheduleCycle(context: Context, configured: Int) {
+        if (!isCycling(context) || configured == 0) {
+            cycleTask?.let(handler::removeCallbacks)
+            cycleTask = null
+            return
+        }
+        if (cycleTask != null) return
+        cycleTask = object : Runnable {
+            override fun run() {
+                val prefs = prefs(context)
+                if (!prefs.getBoolean(KEY_CYCLE, false)) {
+                    cycleTask = null
+                    return
+                }
+                val max = count(context)
+                var current = prefs.getInt(KEY_CURRENT, 0).coerceIn(0, max)
+                var direction = if (prefs.getInt(KEY_DIRECTION, 1) < 0) -1 else 1
+                current += direction
+                if (current >= max) { current = max; direction = -1 }
+                if (current <= 0) { current = 0; direction = 1 }
+                prefs.edit().putInt(KEY_CURRENT, current).putInt(KEY_DIRECTION, direction).apply()
+                apply(context)
+                handler.postDelayed(this, CYCLE_DELAY)
+            }
+        }.also { handler.postDelayed(it, CYCLE_DELAY) }
+    }
+
+    private fun scheduleRecovery(context: Context, desired: Int) {
+        recoveryTask?.let(handler::removeCallbacks)
+        recoveryTask = null
+        if (desired == 0 || prefs(context).getBoolean(KEY_RECOVERY_USED, false)) return
+        recoveryTask = Runnable {
+            val manager = context.getSystemService(NotificationManager::class.java)
+            val own = manager.activeNotifications.filter { it.packageName == context.packageName }
+            if (own.any { it.id !in (ID_BASE + 1)..(ID_BASE + MAX_COUNT) && !isDebug(it.notification) }) {
+                prefs(context).edit().putBoolean(KEY_RECOVERY_USED, true).apply()
+                own.forEach { cancel(manager, it) }
+                repeat(desired) { manager.notify(ID_BASE + it + 1, notification(context, it + 1)) }
+            }
+        }.also { handler.postDelayed(it, RECOVERY_DELAY) }
+    }
+
+    private fun resetRecoveryAfterBoot(prefs: android.content.SharedPreferences) {
+        val bootEpoch = System.currentTimeMillis() - SystemClock.elapsedRealtime()
+        if (abs(prefs.getLong(KEY_BOOT_EPOCH, -1) - bootEpoch) > 5_000) {
+            prefs.edit().putLong(KEY_BOOT_EPOCH, bootEpoch).putBoolean(KEY_RECOVERY_USED, false).apply()
+        }
+    }
+
+    private fun cancel(manager: NotificationManager, sbn: StatusBarNotification) {
+        sbn.tag?.let { manager.cancel(it, sbn.id) } ?: manager.cancel(sbn.id)
+    }
+
+    private fun prefs(context: Context) = context.getSharedPreferences(PREFS, Context.MODE_PRIVATE)
+}

app/src/main/res/layout/fragment_alert_status.xml

@@ -27,5 +27,81 @@
             android:layout_marginTop="24dp"
             android:text="Without optional system integration, Android keeps the source app’s own sound and vibration. Matching custom alerts play in addition; they do not replace it."
             android:textSize="14sp" />
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="32dp"
+            android:text="@string/debug_notifications_title"
+            android:textSize="18sp"
+            android:textStyle="bold" />
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:text="@string/debug_notifications_description"
+            android:textSize="14sp" />
+
+        <com.google.android.material.switchmaterial.SwitchMaterial
+            android:id="@+id/debug_cycle"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="12dp"
+            android:text="@string/debug_cycle_notifications" />
+
+        <TextView
+            android:id="@+id/debug_count"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:text="0"
+            android:textSize="32sp" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:orientation="horizontal">
+
+            <Button
+                android:id="@+id/debug_minus_10"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:minWidth="0dp"
+                android:text="-10" />
+
+            <Button
+                android:id="@+id/debug_minus_1"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:minWidth="0dp"
+                android:text="-1" />
+
+            <Button
+                android:id="@+id/debug_plus_1"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:minWidth="0dp"
+                android:text="+1" />
+
+            <Button
+                android:id="@+id/debug_plus_10"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:minWidth="0dp"
+                android:text="+10" />
+        </LinearLayout>
+
+        <Button
+            android:id="@+id/debug_reset"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:text="@string/debug_reset_notifications" />
     </LinearLayout>
 </ScrollView>

app/src/main/res/values/strings.xml

@@ -10,6 +10,11 @@
     <string name="page_settings">Settings</string>
     <string name="page_alerts">Alerts</string>
     <string name="page_alert_status">Alert status</string>
+    <string name="debug_notifications_title">Debug notifications</string>
+    <string name="debug_notifications_description">Post up to 50 real, silent notifications to test icon filtering and layout.</string>
+    <string name="debug_cycle_notifications">Cycle between zero and the selected count every two seconds</string>
+    <string name="debug_reset_notifications">Reset</string>
+    <string name="debug_notification_permission_required">Notification permission is required for debug notifications.</string>
     <string name="page_profiles">Profiles</string>
     <string name="page_rules">Rules</string>
     <string name="page_apps">Apps</string>