Restart torrent service if app task is removed.

app/shared/app-data/src/androidMain/kotlin/domain/torrent/service/AniTorrentService.kt

@@ -9,13 +9,14 @@
 
 package me.him188.ani.app.domain.torrent.service
 
+import android.app.AlarmManager
+import android.app.PendingIntent
 import android.content.Context
 import android.content.Intent
-import android.os.Handler
 import android.os.IBinder
-import android.os.Looper
 import android.os.PowerManager
 import android.os.Process
+import android.os.SystemClock
 import androidx.lifecycle.LifecycleService
 import androidx.lifecycle.lifecycleScope
 import kotlinx.coroutines.CompletableDeferred
@@ -35,7 +36,6 @@ import me.him188.ani.app.data.models.preference.ProxySettings
 import me.him188.ani.app.data.models.preference.TorrentPeerConfig
 import me.him188.ani.app.domain.torrent.engines.AnitorrentEngine
 import me.him188.ani.app.domain.torrent.service.proxy.TorrentEngineProxy
-import me.him188.ani.app.platform.BuildConfig
 import me.him188.ani.app.torrent.anitorrent.AnitorrentDownloaderFactory
 import me.him188.ani.datasources.api.topic.FileSize.Companion.bytes
 import me.him188.ani.utils.coroutines.IO_
@@ -72,6 +72,7 @@ class AniTorrentService : LifecycleService(), CoroutineScope {
     }
 
     private val notification = ServiceNotification(this)
+    private val alarmService: AlarmManager by lazy { getSystemService(Context.ALARM_SERVICE) as AlarmManager }
     private val wakeLock: PowerManager.WakeLock by lazy {
         (getSystemService(Context.POWER_SERVICE) as PowerManager)
             .newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "AniTorrentService::wake_lock")
@@ -89,8 +90,8 @@ class AniTorrentService : LifecycleService(), CoroutineScope {
                     torrentPeerConfig,
                     Path(saveDirDeferred.await()).inSystem,
                     coroutineContext,
-                    AnitorrentDownloaderFactory()
-                )
+                    AnitorrentDownloaderFactory(),
+                ),
             )
             logger.info { "anitorrent is initialized." }
         }
@@ -147,6 +148,30 @@ class AniTorrentService : LifecycleService(), CoroutineScope {
         return true
     }
 
+    /**
+     * 在 app 被从最近任务界面划掉时重启服务
+     *
+     * 一些系统, 比如 MIUI, 会在划掉任务的时候杀死整个 app.
+     */
+    override fun onTaskRemoved(rootIntent: Intent?) {
+        val restartServicePendingIntent = PendingIntent.getService(
+            this, 1,
+            Intent(this, this::class.java).apply {
+                setPackage(packageName)
+                putExtra("notification_appearance", notification.notificationAppearance)
+            },
+            PendingIntent.FLAG_ONE_SHOT or PendingIntent.FLAG_IMMUTABLE,
+        )
+        logger.info { "Task of Ani app is removed, scheduling restart service." }
+        alarmService.set(
+            AlarmManager.ELAPSED_REALTIME,
+            SystemClock.elapsedRealtime() + 1000,
+            restartServicePendingIntent,
+        )
+
+        super.onTaskRemoved(rootIntent)
+    }
+
     override fun onDestroy() {
         logger.info { "AniTorrentService is stopping." }
         val engine = kotlin.runCatching { anitorrent.getCompleted() }.getOrNull() ?: return

app/shared/app-data/src/androidMain/kotlin/domain/torrent/service/ServiceNotification.kt

@@ -20,6 +20,8 @@ import android.content.Intent
 import android.graphics.Bitmap
 import android.graphics.drawable.Icon
 import android.os.Build
+import android.os.Parcelable
+import kotlinx.parcelize.Parcelize
 import me.him188.ani.datasources.api.topic.FileSize
 import me.him188.ani.datasources.api.topic.FileSize.Companion.bytes
 
@@ -28,7 +30,8 @@ class ServiceNotification(
 ) {
     private val notificationService by lazy { context.getSystemService(NOTIFICATION_SERVICE) as NotificationManager }
 
-    private var notificationAppearance = defaultNotificationAppearance
+    var notificationAppearance = defaultNotificationAppearance
+        private set
     private var notificationOpenActivityIntent: Intent? = null
     private val stopServiceIntent by lazy {
         PendingIntent.getService(
@@ -50,6 +53,13 @@ class ServiceNotification(
     }
 
     fun parseNotificationStrategyFromIntent(intent: Intent?) {
+        // parse notification appearance first if present
+        val appearance = intent?.getParcelable<NotificationAppearance>("notification_appearance")
+        if (appearance != null) {
+            notificationAppearance = appearance
+            return
+        }
+
         val name = intent.getStringOrDefault("app_name") {
             defaultNotificationAppearance.name
         }
@@ -68,13 +78,8 @@ class ServiceNotification(
         }
         val icon = (intent?.getIntExtra("app_icon", -1) ?: -1)
             .let { if (it != -1) defaultNotificationAppearance.icon else Icon.createWithResource(context, it) }
-
-        notificationOpenActivityIntent = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
-            intent?.getParcelableExtra("open_activity_intent", Intent::class.java)
-        } else {
-            intent?.getParcelableExtra<Intent>("open_activity_intent")
-        }
-
+        notificationOpenActivityIntent = intent?.getParcelable<Intent>("open_activity_intent")
+
         notificationAppearance = NotificationAppearance(
             name = name,
             titleIdle = titleIdle,
@@ -159,6 +164,15 @@ class ServiceNotification(
         return if (result == -1) default() else context.getString(result)
     }
 
+    @Suppress("RemoveExplicitTypeArguments", "Deprecation")
+    private inline fun <reified T : Parcelable> Intent.getParcelable(extraName: String): T? {
+        return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            getParcelableExtra(extraName, T::class.java)
+        } else {
+            getParcelableExtra<T>(extraName)
+        }
+    }
+
     companion object {
         private const val NOTIFICATION_ID = 114
         private const val NOTIFICATION_CHANNEL_ID = "me.him188.ani.app.domain.torrent.service.AniTorrentService"
@@ -174,14 +188,15 @@ class ServiceNotification(
     }
 }
 
+@Parcelize
 class NotificationAppearance(
     val name: String,
     val titleIdle: String,
     val titleWorking: String,
     val content: String,
     val stopActionText: String,
     val icon: Icon,
-)
+) : Parcelable
 
 sealed class NotificationDisplayStrategy(val downloadSpeed: FileSize, val uploadSpeed: FileSize) {
     class Idle(