1 files changed, 70 insertions, 0 deletions
diff --git a/src/android/app/src/main/java/org/yuzu/yuzu_emu/utils/ForegroundService.kt b/src/android/app/src/main/java/org/yuzu/yuzu_emu/utils/ForegroundService.kt
new file mode 100644
index 000000000..dc9b7c744
--- /dev/null
+++ b/src/android/app/src/main/java/org/yuzu/yuzu_emu/utils/ForegroundService.kt
@@ -0,0 +1,70 @@
+// SPDX-FileCopyrightText: 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+package org.yuzu.yuzu_emu.utils
+
+import android.app.PendingIntent
+import android.app.Service
+import android.content.Intent
+import android.os.IBinder
+import androidx.core.app.NotificationCompat
+import androidx.core.app.NotificationManagerCompat
+import org.yuzu.yuzu_emu.R
+import org.yuzu.yuzu_emu.activities.EmulationActivity
+
+/**
+ * A service that shows a permanent notification in the background to avoid the app getting
+ * cleared from memory by the system.
+ */
+class ForegroundService : Service() {
+    companion object {
+        const val EMULATION_RUNNING_NOTIFICATION = 0x1000
+
+        const val ACTION_STOP = "stop"
+    }
+
+    private fun showRunningNotification() {
+        // Intent is used to resume emulation if the notification is clicked
+        val contentIntent = PendingIntent.getActivity(
+            this,
+            0,
+            Intent(this, EmulationActivity::class.java),
+            PendingIntent.FLAG_IMMUTABLE
+        )
+        val builder =
+            NotificationCompat.Builder(this, getString(R.string.emulation_notification_channel_id))
+                .setSmallIcon(R.drawable.ic_stat_notification_logo)
+                .setContentTitle(getString(R.string.app_name))
+                .setContentText(getString(R.string.emulation_notification_running))
+                .setPriority(NotificationCompat.PRIORITY_LOW)
+                .setOngoing(true)
+                .setVibrate(null)
+                .setSound(null)
+                .setContentIntent(contentIntent)
+        startForeground(EMULATION_RUNNING_NOTIFICATION, builder.build())
+    }
+
+    override fun onBind(intent: Intent): IBinder? {
+        return null
+    }
+
+    override fun onCreate() {
+        showRunningNotification()
+    }
+
+    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
+        if (intent == null) {
+            return START_NOT_STICKY;
+        }
+        if (intent.action == ACTION_STOP) {
+            NotificationManagerCompat.from(this).cancel(EMULATION_RUNNING_NOTIFICATION)
+            stopForeground(STOP_FOREGROUND_REMOVE)
+            stopSelfResult(startId)
+        }
+        return START_STICKY
+    }
+
+    override fun onDestroy() {
+        NotificationManagerCompat.from(this).cancel(EMULATION_RUNNING_NOTIFICATION)
+    }
+}