Reorganize notification visibility settings

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

@@ -1,55 +1,21 @@
 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() {
@@ -66,31 +32,6 @@ 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/DebugNotificationsFragment.kt

@@ -0,0 +1,82 @@
+package se.ajpanton.notificationsmaster
+
+import android.Manifest
+import android.os.Bundle
+import android.view.View
+import android.widget.Toast
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.fragment.app.Fragment
+import se.ajpanton.notificationsmaster.databinding.FragmentDebugNotificationsBinding
+import se.ajpanton.notificationsmaster.debug.DebugNotifications
+
+class DebugNotificationsFragment : Fragment(R.layout.fragment_debug_notifications) {
+    private var binding: FragmentDebugNotificationsBinding? = 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)
+        } else {
+            Toast.makeText(context, R.string.debug_notification_permission_required, Toast.LENGTH_SHORT).show()
+        }
+        pendingCount = null
+        pendingCycle = false
+        refresh()
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        binding = FragmentDebugNotificationsBinding.bind(view)
+        binding!!.debugMinus10.setOnClickListener { changeCount(-10) }
+        binding!!.debugMinus1.setOnClickListener { changeCount(-1) }
+        binding!!.debugPlus1.setOnClickListener { changeCount(1) }
+        binding!!.debugPlus10.setOnClickListener { changeCount(10) }
+        binding!!.debugReset.setOnClickListener { setCount(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() {
+        super.onResume()
+        activity?.title = getString(R.string.page_debug_notifications)
+        DebugNotifications.apply(requireContext())
+        refresh()
+    }
+
+    override fun onDestroyView() {
+        binding = null
+        super.onDestroyView()
+    }
+
+    private fun changeCount(delta: Int) = setCount(DebugNotifications.count(requireContext()) + delta)
+
+    private fun setCount(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)
+        refresh()
+    }
+
+    private fun refresh() {
+        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
+    }
+}

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

@@ -123,7 +123,7 @@ class FilterAppsFragment : Fragment(R.layout.fragment_event_settings) {
         currentBinding.appListLoading.visibility = View.VISIBLE
         currentBinding.appListRefresh.isRefreshing = true
         val rule = store.load()
-        val seen = SeenApps.snapshot()
+        val seen = SeenApps.snapshot(requireContext())
         val context = requireContext().applicationContext
         viewLifecycleOwner.lifecycleScope.launch {
             val apps = withContext(Dispatchers.IO) {

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

@@ -169,6 +169,7 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
                     page == Page.APPS -> AppsFragment()
                     page == Page.NOTIFICATION_VISIBILITY -> NotificationVisibilityFragment()
                     page == Page.CARDS_LAYOUT -> CardsLayoutFragment()
+                    page == Page.DEBUG_NOTIFICATIONS -> DebugNotificationsFragment()
                     page == Page.LOG_DISPLAY -> LogDisplayFragment()
                     page == Page.FILTER_LOGGING -> FilterLoggingFragment()
                     page == Page.FILTER_APPS -> FilterAppsFragment.newInstance()
@@ -375,6 +376,7 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
         APPS(R.id.nav_apps, R.string.page_apps),
         NOTIFICATION_VISIBILITY(R.id.nav_notification_visibility, R.string.page_notification_visibility),
         CARDS_LAYOUT(R.id.nav_cards_layout, R.string.page_cards_layout),
+        DEBUG_NOTIFICATIONS(R.id.nav_debug_notifications, R.string.page_debug_notifications),
         LOG_DISPLAY(R.id.nav_log_display, R.string.page_log_display),
         FILTER_LOGGING(R.id.nav_filter_logging, R.string.page_filter_logging),
         FILTER_APPS(R.id.nav_filter_apps, R.string.page_filter_apps),

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

@@ -1,10 +1,14 @@
 package se.ajpanton.notificationsmaster
 
+import android.graphics.Color
+import android.graphics.drawable.Drawable
 import android.os.Bundle
+import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
-import android.widget.LinearLayout
+import android.widget.ImageView
 import android.widget.TextView
+import androidx.core.content.ContextCompat
 import androidx.core.widget.doAfterTextChanged
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.commit
@@ -14,7 +18,9 @@ import androidx.recyclerview.widget.RecyclerView
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
+import se.ajpanton.notificationsmaster.capture.SeenApps
 import se.ajpanton.notificationsmaster.databinding.FragmentNotificationVisibilityBinding
+import se.ajpanton.notificationsmaster.databinding.ItemNotificationVisibilityAppBinding
 import se.ajpanton.notificationsmaster.visibility.AppVisibilityPolicy
 import se.ajpanton.notificationsmaster.visibility.NotificationSurface
 import se.ajpanton.notificationsmaster.visibility.VisibilityPolicyStore
@@ -22,8 +28,8 @@ import se.ajpanton.notificationsmaster.visibility.VisibilityPolicyStore
 class NotificationVisibilityFragment : Fragment(R.layout.fragment_notification_visibility) {
     private var binding: FragmentNotificationVisibilityBinding? = null
     private lateinit var store: VisibilityPolicyStore
-    private val adapter = AppAdapter(::openApp)
+    private val adapter = AppAdapter(::openApp, ::toggleSurface)
-    private var apps = emptyList<InstalledApp>()
+    private var apps = emptyList<AppSnapshot>()
     private var appPolicies = emptyMap<String, AppVisibilityPolicy>()
     private var loadGeneration = 0
 
@@ -32,6 +38,7 @@ class NotificationVisibilityFragment : Fragment(R.layout.fragment_notification_v
         store = VisibilityPolicyStore(requireContext())
         binding!!.appList.layoutManager = LinearLayoutManager(requireContext())
         binding!!.appList.adapter = adapter
+        binding!!.appListRefresh.setOnRefreshListener(::loadApps)
         binding!!.appSearch.doAfterTextChanged { showApps() }
         bindEnabled()
         loadApps()
@@ -65,12 +72,30 @@ class NotificationVisibilityFragment : Fragment(R.layout.fragment_notification_v
         val currentBinding = binding ?: return
         val generation = ++loadGeneration
         val context = requireContext().applicationContext
+        val policies = appPolicies
         currentBinding.appListLoading.visibility = View.VISIBLE
+        currentBinding.appListRefresh.isRefreshing = true
         viewLifecycleOwner.lifecycleScope.launch {
-            val loaded = withContext(Dispatchers.IO) { InstalledApps.all(context) }
+            val loaded = withContext(Dispatchers.IO) {
+                val manager = context.packageManager
+                SeenApps.snapshot(context).mapNotNull { packageName ->
+                    runCatching {
+                        val info = manager.getApplicationInfo(packageName, 0)
+                        AppSnapshot(
+                            InstalledApp(manager.getApplicationLabel(info).toString(), packageName),
+                            manager.getApplicationIcon(info),
+                        )
+                    }.getOrNull()
+                }.sortedWith(
+                    compareBy<AppSnapshot> { policies[it.app.packageName]?.isEdited() != true }
+                        .thenBy { it.app.name.lowercase() }
+                        .thenBy { it.app.packageName },
+                )
+            }
             if (binding === currentBinding && generation == loadGeneration) {
                 apps = loaded
                 currentBinding.appListLoading.visibility = View.GONE
+                currentBinding.appListRefresh.isRefreshing = false
                 showApps()
             }
         }
@@ -80,10 +105,29 @@ class NotificationVisibilityFragment : Fragment(R.layout.fragment_notification_v
         val currentBinding = binding ?: return
         val terms = currentBinding.appSearch.text.toString().lowercase().trim()
             .split(Regex("\\s+")).filter(String::isNotEmpty)
-        adapter.submit(apps.filter { app ->
+        val rows = apps.filter { app ->
-            val searchable = "${app.name}\n${app.packageName}".lowercase()
+            val searchable = "${app.app.name}\n${app.app.packageName}".lowercase()
             terms.all(searchable::contains)
-        }.map { app -> AppRow(app, appPolicies[app.packageName]) })
+        }.map { app -> AppRow(app, appPolicies[app.app.packageName]) }
+        adapter.submit(rows)
+        currentBinding.appListEmpty.visibility = if (
+            rows.isEmpty() && currentBinding.appListLoading.visibility != View.VISIBLE
+        ) View.VISIBLE else View.GONE
+    }
+
+    private fun toggleSurface(row: AppRow, surface: NotificationSurface) {
+        val saved = store.update { policy ->
+            val current = policy.apps.firstOrNull { it.packageName == row.app.app.packageName }
+                ?: AppVisibilityPolicy(row.app.app.packageName)
+            val updated = current.copy(blockedSurfaces = current.blockedSurfaces.toMutableSet().apply {
+                if (surface in current.blockedSurfaces) remove(surface) else add(surface)
+            })
+            val apps = policy.apps.filterNot { it.packageName == current.packageName }.toMutableList()
+            if (updated.isEdited()) apps += updated
+            policy.copy(apps = apps.sortedBy(AppVisibilityPolicy::packageName))
+        }
+        appPolicies = saved.apps.associateBy(AppVisibilityPolicy::packageName)
+        adapter.updatePolicy(row.app.app.packageName, appPolicies[row.app.app.packageName])
     }
 
     private fun openApp(app: InstalledApp) = parentFragmentManager.commit {
@@ -91,9 +135,13 @@ class NotificationVisibilityFragment : Fragment(R.layout.fragment_notification_v
         addToBackStack(null)
     }
 
-    private data class AppRow(val app: InstalledApp, val policy: AppVisibilityPolicy?)
+    private data class AppSnapshot(val app: InstalledApp, val icon: Drawable)
+    private data class AppRow(val app: AppSnapshot, val policy: AppVisibilityPolicy?)
 
-    private class AppAdapter(private val open: (InstalledApp) -> Unit) : RecyclerView.Adapter<AppHolder>() {
+    private class AppAdapter(
+        private val open: (InstalledApp) -> Unit,
+        private val toggle: (AppRow, NotificationSurface) -> Unit,
+    ) : RecyclerView.Adapter<AppHolder>() {
         private var rows = emptyList<AppRow>()
 
         fun submit(newRows: List<AppRow>) {
@@ -101,57 +149,74 @@ class NotificationVisibilityFragment : Fragment(R.layout.fragment_notification_v
             notifyDataSetChanged()
         }
 
-        override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): AppHolder {
+        fun updatePolicy(packageName: String, policy: AppVisibilityPolicy?) {
-            val row = LinearLayout(parent.context).apply {
+            val position = rows.indexOfFirst { it.app.app.packageName == packageName }
-                orientation = LinearLayout.VERTICAL
+            if (position < 0) return
-                isClickable = true
+            rows = rows.toMutableList().also { it[position] = it[position].copy(policy = policy) }
-                isFocusable = true
+            notifyItemChanged(position)
-                setPadding(0, dp(parent, 8), 0, dp(parent, 8))
-                background = context.obtainStyledAttributes(intArrayOf(android.R.attr.selectableItemBackground))
-                    .let { values -> values.getDrawable(0).also { values.recycle() } }
-            }
-            val name = TextView(parent.context).apply {
-                textSize = 16f
-                setTypeface(typeface, android.graphics.Typeface.BOLD)
-            }
-            val packageName = TextView(parent.context).apply { textSize = 12f }
-            val summary = TextView(parent.context).apply { textSize = 13f }
-            row.addView(name)
-            row.addView(packageName)
-            row.addView(summary)
-            return AppHolder(row, name, packageName, summary)
         }
 
+        override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) = AppHolder(
+            ItemNotificationVisibilityAppBinding.inflate(LayoutInflater.from(parent.context), parent, false),
+        )
+
         override fun onBindViewHolder(holder: AppHolder, position: Int) {
             val row = rows[position]
-            holder.name.text = row.app.name
+            val binding = holder.binding
-            holder.packageName.text = row.app.packageName
+            val policy = row.policy
-            holder.summary.text = summary(row.policy)
+            binding.visibilityAppName.text = row.app.app.name
-            holder.itemView.setOnClickListener { open(row.app) }
+            binding.visibilityAppPackage.text = row.app.app.packageName
+            val exceptionCount = policy?.exceptions?.size ?: 0
+            binding.visibilityAppExceptions.visibility = if (exceptionCount > 0) View.VISIBLE else View.GONE
+            binding.visibilityAppExceptions.text = "$exceptionCount text exception" + if (exceptionCount == 1) "" else "s"
+            binding.visibilityAppRoot.setBackgroundColor(
+                if (policy?.isEdited() == true) ContextCompat.getColor(
+                    binding.root.context,
+                    R.color.visibility_edited_background,
+                ) else Color.TRANSPARENT,
+            )
+            bindSurface(binding.visibilityAodIcon, binding.visibilityAodCross, row, NotificationSurface.AOD)
+            bindSurface(
+                binding.visibilityLockscreenIcon,
+                binding.visibilityLockscreenCross,
+                row,
+                NotificationSurface.LOCKSCREEN_COLLAPSED,
+            )
+            bindSurface(
+                binding.visibilityUnlockedIcon,
+                binding.visibilityUnlockedCross,
+                row,
+                NotificationSurface.UNLOCKED_STATUSBAR,
+            )
+            binding.visibilityAodCell.setOnClickListener { toggle(row, NotificationSurface.AOD) }
+            binding.visibilityLockscreenCell.setOnClickListener {
+                toggle(row, NotificationSurface.LOCKSCREEN_COLLAPSED)
+            }
+            binding.visibilityUnlockedCell.setOnClickListener {
+                toggle(row, NotificationSurface.UNLOCKED_STATUSBAR)
+            }
+            binding.visibilityAppRoot.setOnClickListener { open(row.app.app) }
         }
 
         override fun getItemCount() = rows.size
 
-        private fun summary(policy: AppVisibilityPolicy?): String {
+        private fun bindSurface(
-            if (policy == null) return "Visible on all surfaces"
+            icon: ImageView,
-            val hidden = listOf(
+            cross: TextView,
-                NotificationSurface.UNLOCKED_STATUSBAR to "status bar",
+            row: AppRow,
-                NotificationSurface.LOCKSCREEN_COLLAPSED to "lockscreen",
+            surface: NotificationSurface,
-                NotificationSurface.AOD to "AOD",
+        ) {
-            ).filter { it.first in policy.blockedSurfaces }.joinToString { it.second }
+            icon.setImageDrawable(row.app.icon.constantState?.newDrawable()?.mutate() ?: row.app.icon)
-            val defaults = if (hidden.isEmpty()) "Visible on all surfaces" else "Hidden: $hidden"
+            val hidden = surface in row.policy?.blockedSurfaces.orEmpty()
-            return if (policy.exceptions.isEmpty()) defaults else "$defaults • ${policy.exceptions.size} text exception" +
+            icon.alpha = if (hidden) 0.25f else 1f
-                if (policy.exceptions.size == 1) "" else "s"
+            cross.visibility = if (hidden) View.VISIBLE else View.GONE
+        }
     }
 
-        private fun dp(parent: ViewGroup, value: Int) =
+    private class AppHolder(val binding: ItemNotificationVisibilityAppBinding) :
-            (value * parent.resources.displayMetrics.density).toInt()
+        RecyclerView.ViewHolder(binding.root)
-    }
 
-    private class AppHolder(
+    private companion object {
-        view: View,
+        fun AppVisibilityPolicy.isEdited() = blockedSurfaces.isNotEmpty() || exceptions.isNotEmpty()
-        val name: TextView,
+    }
-        val packageName: TextView,
-        val summary: TextView,
-    ) : RecyclerView.ViewHolder(view)
 }

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

@@ -62,7 +62,7 @@ class NotificationCaptureService : NotificationListenerService() {
         getActiveNotifications()?.forEach { sbn ->
             if (DebugNotifications.isManaged(this, sbn)) return@forEach
             val snapshot = NotificationContents.snapshot(sbn)
-            SeenApps.markSeen(snapshot.packageName)
+            SeenApps.markSeen(this, snapshot.packageName)
             activeNotifications[snapshot.key] = snapshot
             record(
                 snapshot,
@@ -77,7 +77,7 @@ class NotificationCaptureService : NotificationListenerService() {
     override fun onNotificationPosted(sbn: StatusBarNotification) {
         if (DebugNotifications.isManaged(this, sbn)) return
         val snapshot = NotificationContents.snapshot(sbn)
-        SeenApps.markSeen(snapshot.packageName)
+        SeenApps.markSeen(this, snapshot.packageName)
         val previous = activeNotifications.put(snapshot.key, snapshot)
         when {
             previous == null -> {
@@ -113,7 +113,7 @@ class NotificationCaptureService : NotificationListenerService() {
     ) {
         if (DebugNotifications.isManaged(this, sbn)) return
         val snapshot = activeNotifications.remove(sbn.key) ?: NotificationContents.snapshot(sbn)
-        SeenApps.markSeen(snapshot.packageName)
+        SeenApps.markSeen(this, snapshot.packageName)
         record(snapshot, actionForRemoval(reason), LoggingType.DISAPPEARING, includeContents = false)
     }
 

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

@@ -1,10 +1,39 @@
 package se.ajpanton.notificationsmaster.capture
 
-import java.util.concurrent.ConcurrentHashMap
+import android.content.Context
+import android.os.SystemClock
+import kotlin.math.abs
 
-/** Process/boot-lifetime record of packages seen by the listener. */
+/** Persists packages seen by the listener for the duration of the current boot. */
 object SeenApps {
-    private val packages = ConcurrentHashMap.newKeySet<String>()
+    @Synchronized
-    fun markSeen(packageName: String) { packages += packageName }
+    fun markSeen(context: Context, packageName: String) {
-    fun snapshot(): Set<String> = packages.toSet()
+        val preferences = preferences(context)
+        resetAfterBoot(preferences)
+        val packages = preferences.getStringSet(KEY_PACKAGES, emptySet()).orEmpty()
+        if (packageName !in packages) {
+            preferences.edit().putStringSet(KEY_PACKAGES, packages + packageName).apply()
+        }
+    }
+
+    @Synchronized
+    fun snapshot(context: Context): Set<String> {
+        val preferences = preferences(context)
+        resetAfterBoot(preferences)
+        return preferences.getStringSet(KEY_PACKAGES, emptySet()).orEmpty().toSet()
+    }
+
+    private fun resetAfterBoot(preferences: android.content.SharedPreferences) {
+        val bootEpoch = System.currentTimeMillis() - SystemClock.elapsedRealtime()
+        if (abs(preferences.getLong(KEY_BOOT_EPOCH, -1) - bootEpoch) > 5_000) {
+            preferences.edit().putLong(KEY_BOOT_EPOCH, bootEpoch).remove(KEY_PACKAGES).commit()
+        }
+    }
+
+    private fun preferences(context: Context) =
+        context.applicationContext.getSharedPreferences(PREFERENCES, Context.MODE_PRIVATE)
+
+    private const val PREFERENCES = "seen_notification_apps"
+    private const val KEY_PACKAGES = "packages"
+    private const val KEY_BOOT_EPOCH = "boot_epoch"
 }

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

@@ -28,80 +28,5 @@
             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/layout/fragment_app_visibility.xml

@@ -26,10 +26,10 @@
         android:textStyle="bold" />
 
     <com.google.android.material.switchmaterial.SwitchMaterial
-        android:id="@+id/hide_unlocked"
+        android:id="@+id/hide_aod"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:text="Unlocked status bar" />
+        android:text="Always-on display" />
 
     <com.google.android.material.switchmaterial.SwitchMaterial
         android:id="@+id/hide_lockscreen"
@@ -38,10 +38,10 @@
         android:text="Collapsed lockscreen" />
 
     <com.google.android.material.switchmaterial.SwitchMaterial
-        android:id="@+id/hide_aod"
+        android:id="@+id/hide_unlocked"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:text="Always-on display" />
+        android:text="Unlocked status bar" />
 
     <LinearLayout
         android:layout_width="match_parent"

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

@@ -0,0 +1,79 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:padding="@dimen/page_padding">
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            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/layout/fragment_notification_visibility.xml

@@ -15,9 +15,16 @@
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_marginTop="8dp"
-        android:text="Requires LSPosed. Unsupported surfaces remain unchanged."
+        android:text="Requires LSPosed. Only apps seen producing a notification since the last boot are listed."
         android:textAppearance="?attr/textAppearanceBody2" />
 
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="4dp"
+        android:text="Tap an app icon to hide or show it on AOD, the lockscreen, or the unlocked status bar. Tap the app name for text exceptions."
+        android:textAppearance="?attr/textAppearanceCaption" />
+
     <EditText
         android:id="@+id/app_search"
         android:layout_width="match_parent"
@@ -33,6 +40,11 @@
         android:layout_marginTop="8dp"
         android:layout_weight="1">
 
+        <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
+            android:id="@+id/app_list_refresh"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent">
+
             <androidx.recyclerview.widget.RecyclerView
                 android:id="@+id/app_list"
                 android:layout_width="match_parent"
@@ -41,6 +53,17 @@
                 android:fastScrollAlwaysVisible="true"
                 android:fastScrollEnabled="true"
                 android:paddingBottom="16dp" />
+        </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
+
+        <TextView
+            android:id="@+id/app_list_empty"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:gravity="center"
+            android:text="No notification-producing apps have been seen since boot."
+            android:textAppearance="?attr/textAppearanceBody2"
+            android:visibility="gone" />
 
         <ProgressBar
             android:id="@+id/app_list_loading"

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

@@ -0,0 +1,129 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/visibility_app_root"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:foreground="?attr/selectableItemBackground"
+    android:gravity="center_vertical"
+    android:minHeight="58dp"
+    android:orientation="horizontal"
+    android:paddingStart="4dp"
+    android:paddingTop="7dp"
+    android:paddingEnd="4dp"
+    android:paddingBottom="7dp">
+
+    <FrameLayout
+        android:id="@+id/visibility_aod_cell"
+        android:layout_width="30dp"
+        android:layout_height="40dp"
+        android:foreground="?attr/selectableItemBackgroundBorderless">
+
+        <ImageView
+            android:id="@+id/visibility_aod_icon"
+            android:layout_width="26dp"
+            android:layout_height="26dp"
+            android:layout_gravity="center"
+            android:contentDescription="AOD visibility"
+            android:scaleType="fitCenter" />
+
+        <TextView
+            android:id="@+id/visibility_aod_cross"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:gravity="center"
+            android:text="✕"
+            android:textColor="@color/visibility_hidden_cross"
+            android:textSize="16sp"
+            android:textStyle="bold"
+            android:visibility="gone" />
+    </FrameLayout>
+
+    <FrameLayout
+        android:id="@+id/visibility_lockscreen_cell"
+        android:layout_width="30dp"
+        android:layout_height="40dp"
+        android:layout_marginStart="4dp"
+        android:foreground="?attr/selectableItemBackgroundBorderless">
+
+        <ImageView
+            android:id="@+id/visibility_lockscreen_icon"
+            android:layout_width="26dp"
+            android:layout_height="26dp"
+            android:layout_gravity="center"
+            android:contentDescription="Lockscreen visibility"
+            android:scaleType="fitCenter" />
+
+        <TextView
+            android:id="@+id/visibility_lockscreen_cross"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:gravity="center"
+            android:text="✕"
+            android:textColor="@color/visibility_hidden_cross"
+            android:textSize="16sp"
+            android:textStyle="bold"
+            android:visibility="gone" />
+    </FrameLayout>
+
+    <FrameLayout
+        android:id="@+id/visibility_unlocked_cell"
+        android:layout_width="30dp"
+        android:layout_height="40dp"
+        android:layout_marginStart="4dp"
+        android:foreground="?attr/selectableItemBackgroundBorderless">
+
+        <ImageView
+            android:id="@+id/visibility_unlocked_icon"
+            android:layout_width="26dp"
+            android:layout_height="26dp"
+            android:layout_gravity="center"
+            android:contentDescription="Unlocked status-bar visibility"
+            android:scaleType="fitCenter" />
+
+        <TextView
+            android:id="@+id/visibility_unlocked_cross"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:gravity="center"
+            android:text="✕"
+            android:textColor="@color/visibility_hidden_cross"
+            android:textSize="16sp"
+            android:textStyle="bold"
+            android:visibility="gone" />
+    </FrameLayout>
+
+    <LinearLayout
+        android:id="@+id/visibility_app_text"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="10dp"
+        android:layout_weight="1"
+        android:orientation="vertical"
+        android:paddingTop="4dp"
+        android:paddingBottom="4dp">
+
+        <TextView
+            android:id="@+id/visibility_app_name"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:ellipsize="end"
+            android:maxLines="1"
+            android:textAppearance="?attr/textAppearanceBody1"
+            android:textStyle="bold" />
+
+        <TextView
+            android:id="@+id/visibility_app_package"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:ellipsize="end"
+            android:maxLines="1"
+            android:textAppearance="?attr/textAppearanceCaption" />
+
+        <TextView
+            android:id="@+id/visibility_app_exceptions"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:textAppearance="?attr/textAppearanceCaption"
+            android:visibility="gone" />
+    </LinearLayout>
+</LinearLayout>

app/src/main/res/menu/drawer_menu.xml

@@ -21,12 +21,17 @@
         <item
             android:id="@+id/nav_apps"
             android:title="@string/navigation_indented_apps" />
+    </group>
+    <group android:checkableBehavior="single">
         <item
             android:id="@+id/nav_notification_visibility"
-            android:title="@string/navigation_indented_notification_visibility" />
+            android:title="@string/navigation_notifications_header" />
         <item
             android:id="@+id/nav_cards_layout"
             android:title="@string/navigation_indented_cards_layout" />
+        <item
+            android:id="@+id/nav_debug_notifications"
+            android:title="@string/navigation_indented_debug_notifications" />
     </group>
     <group android:checkableBehavior="single">
         <item

app/src/main/res/values-night/colors.xml

@@ -15,4 +15,6 @@
     <color name="app_filter_inherited_icon">#000000</color>
     <color name="app_filter_override_background">#4A4B53</color>
     <color name="app_filter_override_icon">#B8CCFF</color>
+    <color name="visibility_hidden_cross">#FF8A9A</color>
+    <color name="visibility_edited_background">#24294775</color>
 </resources>

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

@@ -15,4 +15,6 @@
     <color name="app_filter_inherited_icon">#FFFFFF</color>
     <color name="app_filter_override_background">#D0D0D8</color>
     <color name="app_filter_override_icon">#34588E</color>
+    <color name="visibility_hidden_cross">#B00020</color>
+    <color name="visibility_edited_background">#183B5C9C</color>
 </resources>

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

@@ -4,13 +4,13 @@
     <string name="notification_listener_label">Notifications Master listener</string>
     <string name="navigation_open">Open navigation</string>
     <string name="navigation_close">Close navigation</string>
-    <string name="navigation_alerts_header">Notification control</string>
+    <string name="navigation_alerts_header">Alerts</string>
+    <string name="navigation_notifications_header">Notifications</string>
     <string name="navigation_logging_header">Logging</string>
     <string name="page_view_logs">View logs</string>
     <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>
@@ -18,7 +18,8 @@
     <string name="page_profiles">Profiles</string>
     <string name="page_rules">Rules</string>
     <string name="page_apps">Apps</string>
-    <string name="page_notification_visibility">Notification visibility</string>
+    <string name="page_notification_visibility">Notifications</string>
+    <string name="page_debug_notifications">Debug icons</string>
     <string name="page_cards_layout">Cards layout</string>
     <string name="page_filter_apps">Filter apps</string>
     <string name="page_log_display">Log display</string>
@@ -28,8 +29,8 @@
     <string name="navigation_indented_profiles">&#160;&#160;&#160;&#160;Profiles</string>
     <string name="navigation_indented_rules">&#160;&#160;&#160;&#160;Rules</string>
     <string name="navigation_indented_apps">&#160;&#160;&#160;&#160;Apps</string>
-    <string name="navigation_indented_notification_visibility">&#160;&#160;&#160;&#160;Visibility</string>
     <string name="navigation_indented_cards_layout">&#160;&#160;&#160;&#160;Cards layout</string>
+    <string name="navigation_indented_debug_notifications">&#160;&#160;&#160;&#160;Debug icons</string>
     <string name="navigation_indented_filter_logging">&#160;&#160;&#160;&#160;Filter logging</string>
     <string name="navigation_indented_filter_apps">&#160;&#160;&#160;&#160;Filter apps</string>
 </resources>