Implemented feedback for update flow.

app/src/main/java/com/futo/platformplayer/UpdateActionReceiver.kt

@@ -5,50 +5,14 @@ import android.content.Context
 import android.content.Intent
 import androidx.core.app.NotificationManagerCompat
 import androidx.core.content.ContextCompat
-import com.futo.platformplayer.activities.MainActivity
-import com.futo.platformplayer.dialogs.AutoUpdateDialog
-import com.futo.platformplayer.states.StateApp
-import java.io.File
 
 class UpdateActionReceiver : BroadcastReceiver() {
     override fun onReceive(context: Context, intent: Intent) {
         when (intent.action) {
-            UpdateNotificationManager.ACTION_UPDATE_YES -> handleUpdateYes(context, intent)
-            UpdateNotificationManager.ACTION_UPDATE_NO -> handleUpdateNo(context)
-            UpdateNotificationManager.ACTION_UPDATE_NEVER -> handleUpdateNever(context)
             UpdateNotificationManager.ACTION_DOWNLOAD_CANCEL -> handleDownloadCancel(context, intent)
         }
     }
 
-    private fun handleUpdateYes(context: Context, intent: Intent) {
-        AutoUpdateDialog.currentDialog?.dismiss()
-
-        val version = intent.getIntExtra(UpdateNotificationManager.EXTRA_VERSION, 0)
-        if (version == 0) {
-            return
-        }
-
-        NotificationManagerCompat.from(context).cancel(UpdateNotificationManager.NOTIF_ID_AVAILABLE)
-
-        val serviceIntent = Intent(context, UpdateDownloadService::class.java).apply {
-            putExtra(UpdateDownloadService.EXTRA_VERSION, version)
-        }
-        ContextCompat.startForegroundService(context, serviceIntent)
-    }
-
-    private fun handleUpdateNo(context: Context) {
-        AutoUpdateDialog.currentDialog?.dismiss()
-        NotificationManagerCompat.from(context).cancel(UpdateNotificationManager.NOTIF_ID_AVAILABLE)
-    }
-
-    private fun handleUpdateNever(context: Context) {
-        AutoUpdateDialog.currentDialog?.dismiss()
-        Settings.instance.autoUpdate.check = 1
-        Settings.instance.save()
-
-        UpdateNotificationManager.cancelAll(context)
-    }
-
     private fun handleDownloadCancel(context: Context, intent: Intent) {
         val version = intent.getIntExtra(UpdateNotificationManager.EXTRA_VERSION, 0)
 

app/src/main/java/com/futo/platformplayer/UpdateCheckWorker.kt

@@ -1,11 +1,12 @@
 package com.futo.platformplayer
 
 import android.content.Context
+import android.content.Intent
+import androidx.core.content.ContextCompat
 import androidx.work.CoroutineWorker
 import androidx.work.WorkerParameters
 import com.futo.platformplayer.api.http.ManagedHttpClient
 import com.futo.platformplayer.logging.Logger
-import com.futo.platformplayer.states.StateApp
 import com.futo.platformplayer.states.StateUpdate
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
@@ -35,18 +36,16 @@ class UpdateCheckWorker(appContext: Context, workerParams: WorkerParameters) : C
                     return@withContext Result.success()
                 }
 
-                UpdateNotificationManager.showUpdateAvailableNotification(applicationContext, latestVersion)
+                StateUpdate.Companion.instance.setUiAvailable(latestVersion)
 
-                if (StateApp.instance.isMainActive) {
+                try {
-                    withContext(Dispatchers.Main) {
+                    val serviceIntent = Intent(applicationContext, UpdateDownloadService::class.java).apply {
-                        StateApp.withContext { ctx ->
+                        putExtra(UpdateDownloadService.EXTRA_VERSION, latestVersion)
-                            try {
-                                UIDialogs.showUpdateAvailableDialog(ctx, latestVersion, false)
-                            } catch (t: Throwable) {
-                                Logger.w(TAG, "Failed to show in-app update dialog from worker", t)
-                            }
-                        }
                     }
+                    ContextCompat.startForegroundService(applicationContext, serviceIntent)
+                } catch (t: Throwable) {
+                    Logger.w(TAG, "Failed to start UpdateDownloadService", t)
+                    StateUpdate.Companion.instance.setUiFailed(latestVersion, t.message)
                 }
 
                 Result.success()

app/src/main/java/com/futo/platformplayer/UpdateDownloadService.kt

@@ -1,17 +1,15 @@
 package com.futo.platformplayer
 
-import android.app.Dialog
 import android.app.Service
 import android.content.Intent
 import android.os.IBinder
 import android.os.SystemClock
-import com.futo.platformplayer.UIDialogs.ActionStyle
+import androidx.core.app.NotificationManagerCompat
 import com.futo.platformplayer.logging.Logger
 import com.futo.platformplayer.models.ImageVariable
 import com.futo.platformplayer.states.AnnouncementType
 import com.futo.platformplayer.states.SessionAnnouncement
 import com.futo.platformplayer.states.StateAnnouncement
-import com.futo.platformplayer.states.StateApp
 import com.futo.platformplayer.states.StateUpdate
 import kotlinx.coroutines.*
 import java.io.File
@@ -30,8 +28,6 @@ class UpdateDownloadService : Service() {
         private const val INITIAL_BACKOFF_MS = 5_000L
         private const val BUFFER_SIZE = 8 * 1024
         private const val MIN_PROGRESS_UPDATE_INTERVAL_MS = 500L
-
-        var updateDownloadedDialog: Dialog? = null
     }
 
     private val job = SupervisorJob()
@@ -56,6 +52,7 @@ class UpdateDownloadService : Service() {
         if (intent.getBooleanExtra(EXTRA_CANCEL, false)) {
             cancelRequested = true
             Logger.i(TAG, "Download cancel requested")
+            StateUpdate.Companion.instance.clearUi()
             stopForeground(Service.STOP_FOREGROUND_REMOVE)
             stopSelf()
             return START_NOT_STICKY
@@ -75,6 +72,10 @@ class UpdateDownloadService : Service() {
         isDownloading = true
         cancelRequested = false
 
+        StateUpdate.Companion.instance.setUiDownloading(version, 0, indeterminate = true)
+
+        NotificationManagerCompat.from(this).cancel(UpdateNotificationManager.NOTIF_ID_READY)
+
         val notification = UpdateNotificationManager.buildDownloadProgressNotification(this, version, 0, true)
         startForeground(UpdateNotificationManager.NOTIF_ID_DOWNLOADING, notification)
 
@@ -97,6 +98,7 @@ class UpdateDownloadService : Service() {
         if (force || now - lastProgressUpdateElapsedMs >= MIN_PROGRESS_UPDATE_INTERVAL_MS) {
             lastProgressUpdateElapsedMs = now
             UpdateNotificationManager.updateDownloadProgress(this, version, progress, indeterminate);
+            StateUpdate.Companion.instance.setUiDownloading(version, progress, indeterminate)
 
             if(onProgress != null)
                 onProgress.invoke(progress);
@@ -159,6 +161,7 @@ class UpdateDownloadService : Service() {
                     if (attempt == MAX_RETRIES - 1) {
                         Logger.e(TAG, "Download failed after ${attempt + 1} attempts", t)
                         UpdateNotificationManager.showDownloadFailedNotification(this, version, t)
+                        StateUpdate.Companion.instance.setUiFailed(version, t.message)
                         break
                     } else {
                         Logger.w(TAG, "Download attempt ${attempt + 1} failed, retrying in ${backoffMs / 1000}s", t)
@@ -264,39 +267,16 @@ class UpdateDownloadService : Service() {
     private fun onDownloadComplete(version: Int, apkFile: File) {
         Logger.i(TAG, "Download complete for version=$version, file=${apkFile.absolutePath}")
         UpdateNotificationManager.showDownloadCompleteNotification(this, version, apkFile)
+        StateUpdate.Companion.instance.setUiReady(version, apkFile)
 
-        if (StateApp.instance.isMainActive) {
+        try {
-            StateApp.instance.scopeOrNull?.launch(Dispatchers.Main) {
+            val ctx = applicationContext
-                StateApp.withContext { ctx ->
+            StateAnnouncement.instance.registerAnnouncement("install-update-apk", "Grayjay v${version} is ready!", "You can now install the new Grayjay version.", AnnouncementType.SESSION, OffsetDateTime.now(), "update", "Install") {
-                    try {
+                UpdateNotificationManager.cancelAll(ctx)
-                        updateDownloadedDialog = UIDialogs.showDialog(ctx, R.drawable.foreground,
+                UpdateInstaller.startInstall(ctx, version, apkFile)
-                            "Update downloaded",
-                            "Would you like to install it now?", null, 0,
-                            UIDialogs.Action("Not now", {
-                                updateDownloadedDialog = null
-                            }, ActionStyle.NONE, true),
-                            UIDialogs.Action("Install", {
-                                UpdateNotificationManager.cancelAll(ctx)
-                                UpdateInstaller.startInstall(ctx, version, apkFile)
-                            }, ActionStyle.PRIMARY, true));
-
-                        try {
-                            StateAnnouncement.instance.registerAnnouncement("install-update-apk", "Grayjay v${version} is ready!", "You can now install the new Grayjay version.",
-                                AnnouncementType.SESSION,
-                                OffsetDateTime.now(), "update", "Install", {
-                                    UpdateNotificationManager.cancelAll(ctx)
-                                    UpdateInstaller.startInstall(ctx, version, apkFile)
-                                });
-                        }
-                        catch(ex: Throwable) {
-
-                        }
-                    } catch (t: Throwable) {
-                        Logger.w(TAG, "Failed to show in-app update downloaded dialog", t)
-                        updateDownloadedDialog = null
-                    }
-                }
             }
+        } catch (ex: Throwable) {
+            Logger.w(TAG, "Failed to register install announcement", ex)
         }
     }
 }

app/src/main/java/com/futo/platformplayer/UpdateInstaller.kt

@@ -21,6 +21,7 @@ import java.io.InputStream
 import androidx.core.net.toUri
 import com.futo.platformplayer.dialogs.AutoUpdateDialog
 import com.futo.platformplayer.states.StateApp
+import com.futo.platformplayer.states.StateUpdate
 
 object UpdateInstaller {
     private const val TAG = "UpdateInstaller"
@@ -61,6 +62,17 @@ object UpdateInstaller {
             var inputStream: InputStream? = null
             var session: PackageInstaller.Session? = null
             try {
+                val dataLength = apkFile.length()
+                val usable = try { context.filesDir.usableSpace } catch (_: Throwable) { -1L }
+                if (usable in 0 until dataLength) {
+                    val msg = "Not enough storage to install update. Need ${dataLength / 1_048_576L}MB, have ${usable / 1_048_576L}MB free."
+                    Logger.w(TAG, msg)
+                    withContext(Dispatchers.Main) {
+                        UIDialogs.toast(context, msg)
+                    }
+                    UpdateNotificationManager.showInstallFailedNotification(context, version, apkFile, msg)
+                    return@launch
+                }
 
                 val packageInstaller: PackageInstaller = context.packageManager.packageInstaller
                 val params = PackageInstaller.SessionParams(PackageInstaller.SessionParams.MODE_FULL_INSTALL)
@@ -68,7 +80,6 @@ object UpdateInstaller {
                 session = packageInstaller.openSession(sessionId)
 
                 inputStream = apkFile.inputStream()
-                val dataLength = apkFile.length()
 
                 session.openWrite("package", 0, dataLength).use { sessionStream ->
                     inputStream.copyToOutputStream(dataLength, sessionStream) { _ -> }
@@ -91,11 +102,18 @@ object UpdateInstaller {
             } catch (e: Throwable) {
                 Logger.w(TAG, "Exception while installing update", e)
                 session?.abandon()
+
+                val raw = e.message ?: ""
+                val friendly = if (raw.contains("Failed to allocate") || raw.contains("allocatable") || raw.contains("ENOSPC", ignoreCase = true)) {
+                    "Not enough storage to install update. Free up some space and try again."
+                } else {
+                    "Failed to install update: $raw"
+                }
                 withContext(Dispatchers.Main) {
-                    UIDialogs.toast(context, "Failed to install update: ${e.message}")
+                    UIDialogs.toast(context, friendly)
                 }
 
-                UpdateNotificationManager.showInstallFailedNotification(context, version, apkFile, e.message)
+                UpdateNotificationManager.showInstallFailedNotification(context, version, apkFile, friendly)
             } finally {
                 session?.close()
                 inputStream?.close()
@@ -110,10 +128,12 @@ object UpdateInstaller {
             if (result.isNullOrEmpty()) {
                 Logger.i(TAG, "Update install finished successfully")
                 UpdateNotificationManager.showInstallSucceededNotification(context, version)
+                StateUpdate.instance.clearUi()
             } else {
                 Logger.w(TAG, "Update install failed: $result")
                 UpdateNotificationManager.showInstallFailedNotification(context, version, apkFile, result)
                 UIDialogs.showGeneralErrorDialog(context, "Install failed due to:\n$result")
+                StateUpdate.instance.setUiReady(version, apkFile)
             }
         } catch (e: Throwable) {
             Logger.e(TAG, "Failed to handle install result", e)

app/src/main/java/com/futo/platformplayer/UpdateNotificationManager.kt

@@ -22,9 +22,6 @@ object UpdateNotificationManager {
     private const val CHANNEL_NAME = "App updates"
     private const val CHANNEL_DESCRIPTION = "Notifications about new app versions"
 
-    const val ACTION_UPDATE_YES = "com.futo.platformplayer.UPDATE_YES"
-    const val ACTION_UPDATE_NO = "com.futo.platformplayer.UPDATE_NO"
-    const val ACTION_UPDATE_NEVER = "com.futo.platformplayer.UPDATE_NEVER"
     const val ACTION_DOWNLOAD_CANCEL = "com.futo.platformplayer.UPDATE_CANCEL"
     const val ACTION_INSTALL_NOW = "com.futo.platformplayer.UPDATE_INSTALL"
     private const val REQUEST_CODE_INSTALL = 1001
@@ -32,7 +29,6 @@ object UpdateNotificationManager {
     const val EXTRA_VERSION = "version"
     const val EXTRA_APK_PATH = "apk_path"
 
-    const val NOTIF_ID_AVAILABLE = 2001
     const val NOTIF_ID_DOWNLOADING = 2002
     const val NOTIF_ID_READY = 2003
     const val NOTIF_ID_INSTALL_FAILED = 2004
@@ -84,43 +80,6 @@ object UpdateNotificationManager {
         NotificationManagerCompat.from(context).notify(NOTIF_ID_INSTALL_SUCCEEDED, builder.build())
     }
 
-    fun showUpdateAvailableNotification(context: Context, version: Int) {
-        if (ContextCompat.checkSelfPermission(context, Manifest.permission.POST_NOTIFICATIONS) != PackageManager.PERMISSION_GRANTED) {
-            return
-        }
-
-        ensureChannel(context)
-
-        val yesIntent = Intent(context, UpdateActionReceiver::class.java).apply {
-            action = ACTION_UPDATE_YES
-            putExtra(EXTRA_VERSION, version)
-        }
-        val yesPendingIntent = getBroadcast(context, 0, yesIntent, FLAG_MUTABLE or FLAG_UPDATE_CURRENT)
-        val noIntent = Intent(context, UpdateActionReceiver::class.java).apply {
-            action = ACTION_UPDATE_NO
-            putExtra(EXTRA_VERSION, version)
-        }
-        val noPendingIntent = getBroadcast(context, 1, noIntent, FLAG_MUTABLE or FLAG_UPDATE_CURRENT)
-        val neverIntent = Intent(context, UpdateActionReceiver::class.java).apply {
-            action = ACTION_UPDATE_NEVER
-            putExtra(EXTRA_VERSION, version)
-        }
-        val neverPendingIntent = getBroadcast(context, 2, neverIntent, FLAG_MUTABLE or FLAG_UPDATE_CURRENT)
-        val builder = NotificationCompat.Builder(context, CHANNEL_ID)
-            .setSmallIcon(R.drawable.foreground)
-            .setContentTitle("Update available")
-            .setContentText("A new version ($version) is available.")
-            .setPriority(NotificationCompat.PRIORITY_DEFAULT)
-            .setAutoCancel(true)
-            .setContentIntent(yesPendingIntent)
-            .setSilent(true)
-            .addAction(0, "Never", neverPendingIntent)
-            .addAction(0, "Not now", noPendingIntent)
-            .addAction(0, "Download", yesPendingIntent)
-
-        NotificationManagerCompat.from(context).notify(NOTIF_ID_AVAILABLE, builder.build())
-    }
-
     fun buildDownloadProgressNotification(context: Context, version: Int, progress: Int, indeterminate: Boolean): Notification {
         ensureChannel(context)
 
@@ -223,11 +182,9 @@ object UpdateNotificationManager {
     }
 
     fun cancelAll(context: Context) {
-        NotificationManagerCompat.from(context).cancel(NOTIF_ID_AVAILABLE)
         NotificationManagerCompat.from(context).cancel(NOTIF_ID_DOWNLOADING)
         NotificationManagerCompat.from(context).cancel(NOTIF_ID_READY)
         NotificationManagerCompat.from(context).cancel(NOTIF_ID_INSTALL_FAILED)
         NotificationManagerCompat.from(context).cancel(NOTIF_ID_INSTALL_SUCCEEDED)
-
     }
 }

app/src/main/java/com/futo/platformplayer/constructs/Event.kt

@@ -71,16 +71,14 @@ class Event0() : EventBase<(()->Unit), (()->Boolean)>() {
     fun emit() : Boolean {
         var handled = false;
 
-        synchronized(_conditionalListeners) {
+        val condSnapshot = synchronized(_conditionalListeners) { _conditionalListeners.toList() };
-            for (conditional in _conditionalListeners)
+        for (conditional in condSnapshot)
-                handled = handled || conditional.handler.invoke();
+            handled = handled || conditional.handler.invoke();
-        }
 
-        synchronized(_listeners) {
+        val snapshot = synchronized(_listeners) { _listeners.toList() };
-            handled = handled || _listeners.isNotEmpty();
+        handled = handled || snapshot.isNotEmpty();
-            for (handler in _listeners)
+        for (handler in snapshot)
-                handler.handler.invoke();
+            handler.handler.invoke();
-        }
 
         return handled;
     }
@@ -88,16 +86,15 @@ class Event0() : EventBase<(()->Unit), (()->Boolean)>() {
 class Event1<T1>() : EventBase<((T1)->Unit), ((T1)->Boolean)>() {
     fun emit(value : T1): Boolean {
         var handled = false;
-        synchronized(_conditionalListeners) {
-            for (conditional in _conditionalListeners)
-                handled = handled || conditional.handler.invoke(value);
-        }
 
-        synchronized(_listeners) {
+        val condSnapshot = synchronized(_conditionalListeners) { _conditionalListeners.toList() };
-            handled = handled || _listeners.isNotEmpty();
+        for (conditional in condSnapshot)
-            for (handler in _listeners)
+            handled = handled || conditional.handler.invoke(value);
-                handler.handler.invoke(value);
+
-        }
+        val snapshot = synchronized(_listeners) { _listeners.toList() };
+        handled = handled || snapshot.isNotEmpty();
+        for (handler in snapshot)
+            handler.handler.invoke(value);
 
         return handled;
     }
@@ -106,16 +103,14 @@ class Event2<T1, T2>() : EventBase<((T1, T2)->Unit), ((T1, T2)->Boolean)>() {
     fun emit(value1 : T1, value2 : T2): Boolean {
         var handled = false;
 
-        synchronized(_conditionalListeners) {
+        val condSnapshot = synchronized(_conditionalListeners) { _conditionalListeners.toList() };
-            for (conditional in _conditionalListeners)
+        for (conditional in condSnapshot)
-                handled = handled || conditional.handler.invoke(value1, value2);
+            handled = handled || conditional.handler.invoke(value1, value2);
-        }
 
-        synchronized(_listeners) {
+        val snapshot = synchronized(_listeners) { _listeners.toList() };
-            handled = handled || _listeners.isNotEmpty();
+        handled = handled || snapshot.isNotEmpty();
-            for (handler in _listeners)
+        for (handler in snapshot)
-                handler.handler.invoke(value1, value2);
+            handler.handler.invoke(value1, value2);
-        }
 
         return handled;
     }
@@ -125,16 +120,14 @@ class Event3<T1, T2, T3>() : EventBase<((T1, T2, T3)->Unit), ((T1, T2, T3)->Bool
     fun emit(value1 : T1, value2 : T2, value3 : T3): Boolean {
         var handled = false;
 
-        synchronized(_conditionalListeners) {
+        val condSnapshot = synchronized(_conditionalListeners) { _conditionalListeners.toList() };
-            for (conditional in _conditionalListeners)
+        for (conditional in condSnapshot)
-                handled = handled || conditional.handler.invoke(value1, value2, value3);
+            handled = handled || conditional.handler.invoke(value1, value2, value3);
-        }
 
-        synchronized(_listeners) {
+        val snapshot = synchronized(_listeners) { _listeners.toList() };
-            handled = handled || _listeners.isNotEmpty();
+        handled = handled || snapshot.isNotEmpty();
-            for (handler in _listeners)
+        for (handler in snapshot)
-                handler.handler.invoke(value1, value2, value3);
+            handler.handler.invoke(value1, value2, value3);
-        }
 
         return handled;
     }

app/src/main/java/com/futo/platformplayer/states/StateApp.kt

@@ -668,6 +668,9 @@ class StateApp {
         if (Settings.instance.autoUpdate.isAutoUpdateEnabled()) {
             if (Settings.instance.autoUpdate.shouldBackgroundDownload) {
                 Logger.i(TAG, "MainApp Started: Initialize [AutoUpdate Background]");
+                scopeOrNull?.launch(Dispatchers.IO) {
+                    StateUpdate.instance.seedUiFromDisk(context)
+                }
                 val constraints = Constraints.Builder()
                     .setRequiredNetworkType(NetworkType.CONNECTED)
                     .build();

app/src/main/java/com/futo/platformplayer/states/StateUpdate.kt

@@ -5,6 +5,7 @@ import android.os.Build
 import com.futo.platformplayer.BuildConfig
 import com.futo.platformplayer.UIDialogs
 import com.futo.platformplayer.api.http.ManagedHttpClient
+import com.futo.platformplayer.constructs.Event0
 import com.futo.platformplayer.copyToOutputStream
 import com.futo.platformplayer.logging.Logger
 import kotlinx.coroutines.Dispatchers
@@ -14,7 +15,113 @@ import java.io.File
 import java.io.InputStream
 import java.io.OutputStream
 
+enum class UpdateUiState { NONE, AVAILABLE, DOWNLOADING, READY, FAILED }
+
 class StateUpdate {
+
+    @Volatile var uiState: UpdateUiState = UpdateUiState.NONE
+        private set
+    @Volatile var uiVersion: Int = 0
+        private set
+    @Volatile var uiProgress: Int = 0
+        private set
+    @Volatile var uiIndeterminate: Boolean = true
+        private set
+    @Volatile var uiApkFile: File? = null
+        private set
+    @Volatile var uiError: String? = null
+        private set
+    @Volatile var uiDismissed: Boolean = false
+        private set
+
+    val onUiChanged = Event0()
+
+    fun setUiAvailable(version: Int) {
+        val transitioned = uiState != UpdateUiState.AVAILABLE
+        uiState = UpdateUiState.AVAILABLE
+        uiVersion = version
+        uiError = null
+        if (transitioned) uiDismissed = false
+        onUiChanged.emit()
+    }
+
+    fun setUiDownloading(version: Int, progress: Int, indeterminate: Boolean) {
+        val transitioned = uiState != UpdateUiState.DOWNLOADING
+        uiState = UpdateUiState.DOWNLOADING
+        uiVersion = version
+        uiProgress = progress
+        uiIndeterminate = indeterminate
+        uiError = null
+        if (transitioned) uiDismissed = false
+        onUiChanged.emit()
+    }
+
+    fun setUiReady(version: Int, apkFile: File) {
+        val transitioned = uiState != UpdateUiState.READY
+        uiState = UpdateUiState.READY
+        uiVersion = version
+        uiApkFile = apkFile
+        uiError = null
+        if (transitioned) uiDismissed = false
+        onUiChanged.emit()
+    }
+
+    fun setUiFailed(version: Int, error: String?) {
+        val transitioned = uiState != UpdateUiState.FAILED
+        uiState = UpdateUiState.FAILED
+        uiVersion = version
+        uiError = error
+        if (transitioned) uiDismissed = false
+        onUiChanged.emit()
+    }
+
+    fun clearUi() {
+        uiState = UpdateUiState.NONE
+        uiVersion = 0
+        uiProgress = 0
+        uiIndeterminate = true
+        uiApkFile = null
+        uiError = null
+        uiDismissed = false
+        onUiChanged.emit()
+    }
+
+    fun dismissUi() {
+        uiDismissed = true
+        onUiChanged.emit()
+    }
+
+    fun seedUiFromDisk(context: Context) {
+        if (uiState != UpdateUiState.NONE) return
+        try {
+            val dir = File(context.filesDir, "updates")
+            if (!dir.exists()) return
+            val abi = try { DESIRED_ABI } catch (t: Throwable) { return }
+            val prefix = "app-$abi-"
+            val suffix = ".apk"
+            val candidates = dir.listFiles { f ->
+                f.isFile && f.name.startsWith(prefix) && f.name.endsWith(suffix)
+            } ?: return
+            var bestVersion = BuildConfig.VERSION_CODE
+            var bestFile: File? = null
+            for (f in candidates) {
+                val versionStr = f.name.removePrefix(prefix).removeSuffix(suffix)
+                val v = versionStr.toIntOrNull() ?: continue
+                if (v > bestVersion && f.length() > 0L) {
+                    bestVersion = v
+                    bestFile = f
+                }
+            }
+            val ready = bestFile
+            if (ready != null) {
+                Logger.i(TAG, "Seeding UI ready from disk: v=$bestVersion file=${ready.absolutePath}")
+                setUiReady(bestVersion, ready)
+            }
+        } catch (t: Throwable) {
+            Logger.w(TAG, "Failed to seed UI from disk", t)
+        }
+    }
+
     suspend fun checkForUpdates(context: Context, showUpToDateToast: Boolean, hideExceptionButtons: Boolean = false) = withContext(Dispatchers.IO) {
         try {
             val client = ManagedHttpClient();

app/src/main/java/com/futo/platformplayer/views/announcements/UpdateBannerView.kt

@@ -0,0 +1,186 @@
+package com.futo.platformplayer.views.announcements
+
+import android.content.Context
+import android.content.Intent
+import android.util.AttributeSet
+import android.view.View
+import android.widget.FrameLayout
+import android.widget.ImageView
+import android.widget.LinearLayout
+import android.widget.ProgressBar
+import android.widget.TextView
+import androidx.core.content.ContextCompat
+import androidx.lifecycle.findViewTreeLifecycleOwner
+import androidx.lifecycle.lifecycleScope
+import com.futo.platformplayer.R
+import com.futo.platformplayer.Settings
+import com.futo.platformplayer.UpdateDownloadService
+import com.futo.platformplayer.UpdateInstaller
+import com.futo.platformplayer.UpdateNotificationManager
+import com.futo.platformplayer.logging.Logger
+import com.futo.platformplayer.states.StateApp
+import com.futo.platformplayer.states.StateUpdate
+import com.futo.platformplayer.states.UpdateUiState
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+
+class UpdateBannerView : LinearLayout {
+    private val _root: FrameLayout
+    private val _iconUpdate: ImageView
+    private val _textTitle: TextView
+    private val _textBody: TextView
+    private val _progressBar: ProgressBar
+    private val _buttonAction: FrameLayout
+    private val _textAction: TextView
+    private val _buttonClose: ImageView
+
+    private val _scope: CoroutineScope?
+
+    constructor(context: Context, attrs: AttributeSet? = null) : super(context, attrs) {
+        inflate(context, R.layout.view_update_banner, this)
+
+        _scope = findViewTreeLifecycleOwner()?.lifecycleScope ?: StateApp.instance.scopeOrNull
+
+        _root = findViewById(R.id.root)
+        _iconUpdate = findViewById(R.id.icon_update)
+        _textTitle = findViewById(R.id.text_title)
+        _textBody = findViewById(R.id.text_body)
+        _progressBar = findViewById(R.id.update_banner_progress)
+        _buttonAction = findViewById(R.id.button_action)
+        _textAction = findViewById(R.id.text_action)
+        _buttonClose = findViewById(R.id.button_close)
+
+        _buttonClose.setOnClickListener {
+            StateUpdate.instance.dismissUi()
+        }
+
+        _buttonAction.setOnClickListener {
+            onActionClicked()
+        }
+
+        refresh()
+    }
+
+    override fun onAttachedToWindow() {
+        super.onAttachedToWindow()
+        StateUpdate.instance.onUiChanged.subscribe(this) {
+            _scope?.launch(Dispatchers.Main) {
+                refresh()
+            }
+        }
+        refresh()
+    }
+
+    override fun onDetachedFromWindow() {
+        super.onDetachedFromWindow()
+        StateUpdate.instance.onUiChanged.remove(this)
+    }
+
+    private fun onActionClicked() {
+        val st = StateUpdate.instance
+        when (st.uiState) {
+            UpdateUiState.READY -> {
+                val apk = st.uiApkFile ?: return
+                UpdateNotificationManager.cancelAll(context)
+                UpdateInstaller.startInstall(context, st.uiVersion, apk)
+            }
+            UpdateUiState.FAILED -> {
+                if (st.uiVersion == 0) return
+                val intent = Intent(context, UpdateDownloadService::class.java).apply {
+                    putExtra(UpdateDownloadService.EXTRA_VERSION, st.uiVersion)
+                }
+                try {
+                    ContextCompat.startForegroundService(context, intent)
+                } catch (t: Throwable) {
+                    Logger.w(TAG, "Retry start service failed", t)
+                }
+            }
+            UpdateUiState.DOWNLOADING -> {
+                val intent = Intent(context, UpdateDownloadService::class.java).apply {
+                    putExtra(UpdateDownloadService.EXTRA_VERSION, st.uiVersion)
+                    putExtra(UpdateDownloadService.EXTRA_CANCEL, true)
+                }
+                try {
+                    ContextCompat.startForegroundService(context, intent)
+                } catch (t: Throwable) {
+                    Logger.w(TAG, "Cancel start service failed", t)
+                }
+            }
+            UpdateUiState.AVAILABLE -> {
+                if (st.uiVersion == 0) return
+                val intent = Intent(context, UpdateDownloadService::class.java).apply {
+                    putExtra(UpdateDownloadService.EXTRA_VERSION, st.uiVersion)
+                }
+                try {
+                    ContextCompat.startForegroundService(context, intent)
+                } catch (t: Throwable) {
+                    Logger.w(TAG, "Download start service failed", t)
+                }
+            }
+            UpdateUiState.NONE -> {}
+        }
+    }
+
+    private fun refresh() {
+        val st = StateUpdate.instance
+        val gateOpen = Settings.instance.autoUpdate.shouldBackgroundDownload
+        val visible = gateOpen && !st.uiDismissed && st.uiState != UpdateUiState.NONE
+
+        if (!visible) {
+            _root.visibility = View.GONE
+            return
+        }
+        _root.visibility = View.VISIBLE
+
+        when (st.uiState) {
+            UpdateUiState.AVAILABLE -> {
+                _textTitle.text = "Update available (v${st.uiVersion})"
+                _textBody.text = "A new Grayjay version is available."
+                _textBody.visibility = View.VISIBLE
+                _progressBar.visibility = View.GONE
+                _textAction.text = "Download"
+                _buttonAction.visibility = View.VISIBLE
+            }
+            UpdateUiState.DOWNLOADING -> {
+                _textTitle.text = "Downloading update (v${st.uiVersion})"
+                if (st.uiIndeterminate) {
+                    _textBody.text = "Starting download…"
+                    _progressBar.isIndeterminate = true
+                } else {
+                    _textBody.text = "${st.uiProgress}% downloaded"
+                    _progressBar.isIndeterminate = false
+                    _progressBar.progress = st.uiProgress
+                }
+                _textBody.visibility = View.VISIBLE
+                _progressBar.visibility = View.VISIBLE
+                _textAction.text = "Cancel"
+                _buttonAction.visibility = View.VISIBLE
+            }
+            UpdateUiState.READY -> {
+                _textTitle.text = "Update v${st.uiVersion} ready"
+                _textBody.text = "Tap install to apply the update."
+                _textBody.visibility = View.VISIBLE
+                _progressBar.visibility = View.GONE
+                _textAction.text = "Install"
+                _buttonAction.visibility = View.VISIBLE
+            }
+            UpdateUiState.FAILED -> {
+                _textTitle.text = "Update failed"
+                val err = st.uiError
+                _textBody.text = if (err.isNullOrBlank()) "Could not download v${st.uiVersion}." else err
+                _textBody.visibility = View.VISIBLE
+                _progressBar.visibility = View.GONE
+                _textAction.text = "Retry"
+                _buttonAction.visibility = View.VISIBLE
+            }
+            UpdateUiState.NONE -> {
+                _root.visibility = View.GONE
+            }
+        }
+    }
+
+    companion object {
+        const val TAG = "UpdateBannerView"
+    }
+}

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

@@ -20,11 +20,20 @@
         app:layout_constraintRight_toRightOf="parent"
         tools:layout="@layout/fragment_overview_top_bar" />
 
+    <com.futo.platformplayer.views.announcements.UpdateBannerView
+        android:id="@+id/update_banner"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        app:layout_constraintTop_toBottomOf="@id/fragment_top_bar"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent" />
+
     <androidx.fragment.app.FragmentContainerView
         android:id="@+id/fragment_main"
         android:layout_width="0dp"
         android:layout_height="0dp"
-        app:layout_constraintTop_toBottomOf="@id/fragment_top_bar"
+        app:layout_constraintTop_toBottomOf="@id/update_banner"
         app:layout_constraintLeft_toLeftOf="parent"
         app:layout_constraintRight_toRightOf="parent"
         app:layout_constraintBottom_toBottomOf="parent"

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

@@ -0,0 +1,94 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:id="@+id/root">
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="@drawable/background_16_round_4dp"
+        android:paddingLeft="10dp"
+        android:paddingTop="10dp"
+        android:paddingRight="10dp"
+        android:paddingBottom="10dp"
+        android:layout_margin="10dp">
+
+        <ImageView android:id="@+id/icon_update"
+            android:layout_width="20dp"
+            android:layout_height="20dp"
+            android:src="@drawable/ic_update"
+            android:layout_marginEnd="8dp"
+            app:layout_constraintLeft_toLeftOf="parent"
+            app:layout_constraintTop_toTopOf="@id/text_title"
+            app:layout_constraintBottom_toBottomOf="@id/text_title" />
+
+        <TextView android:id="@+id/text_title"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            tools:text="Downloading update v123"
+            android:fontFamily="@font/inter_semibold"
+            android:textSize="15sp"
+            android:textColor="@color/white"
+            android:layout_marginStart="8dp"
+            app:layout_constraintLeft_toRightOf="@id/icon_update"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintRight_toLeftOf="@id/button_close" />
+
+        <ImageView android:id="@+id/button_close"
+            android:layout_width="32dp"
+            android:layout_height="32dp"
+            android:padding="6dp"
+            android:src="@drawable/ic_close"
+            android:contentDescription="@string/dismiss"
+            android:background="?android:attr/selectableItemBackgroundBorderless"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintRight_toRightOf="parent" />
+
+        <TextView android:id="@+id/text_body"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            tools:text="42% downloaded"
+            android:fontFamily="@font/inter_light"
+            android:textSize="14sp"
+            android:textColor="#9D9D9D"
+            android:layout_marginTop="2dp"
+            app:layout_constraintLeft_toLeftOf="parent"
+            app:layout_constraintRight_toLeftOf="@id/button_close"
+            app:layout_constraintTop_toBottomOf="@id/text_title" />
+
+        <ProgressBar android:id="@+id/update_banner_progress"
+            style="?android:attr/progressBarStyleHorizontal"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:max="100"
+            android:visibility="gone"
+            app:layout_constraintLeft_toLeftOf="parent"
+            app:layout_constraintRight_toRightOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/text_body" />
+
+        <FrameLayout android:id="@+id/button_action"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:background="@drawable/background_button_primary_round_4dp"
+            app:layout_constraintTop_toBottomOf="@id/update_banner_progress"
+            app:layout_constraintRight_toRightOf="parent">
+
+            <TextView android:id="@+id/text_action"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                tools:text="Install"
+                android:fontFamily="@font/inter_regular"
+                android:textSize="14sp"
+                android:textColor="@color/white"
+                android:paddingTop="10dp"
+                android:paddingBottom="10dp"
+                android:paddingLeft="20dp"
+                android:paddingRight="20dp" />
+        </FrameLayout>
+    </androidx.constraintlayout.widget.ConstraintLayout>
+</FrameLayout>