1 files changed, 63 insertions, 0 deletions
diff --git a/src/android/app/src/main/java/org/citra/citra_emu/utils/ForegroundService.java b/src/android/app/src/main/java/org/citra/citra_emu/utils/ForegroundService.java
new file mode 100644
index 000000000..31c415779
--- /dev/null
+++ b/src/android/app/src/main/java/org/citra/citra_emu/utils/ForegroundService.java
@@ -0,0 +1,63 @@
+/**
+ * Copyright 2014 Dolphin Emulator Project
+ * Licensed under GPLv2+
+ * Refer to the license.txt file included.
+ */
+
+package org.citra.citra_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.citra.citra_emu.R;
+import org.citra.citra_emu.activities.EmulationActivity;
+
+/**
+ * A service that shows a permanent notification in the background to avoid the app getting
+ * cleared from memory by the system.
+ */
+public class ForegroundService extends Service {
+    private static final int EMULATION_RUNNING_NOTIFICATION = 0x1000;
+
+    private void showRunningNotification() {
+        // Intent is used to resume emulation if the notification is clicked
+        PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
+                new Intent(this, EmulationActivity.class), PendingIntent.FLAG_IMMUTABLE);
+
+        NotificationCompat.Builder builder = new NotificationCompat.Builder(this, getString(R.string.app_notification_channel_id))
+                .setSmallIcon(R.drawable.ic_stat_notification_logo)
+                .setContentTitle(getString(R.string.app_name))
+                .setContentText(getString(R.string.app_notification_running))
+                .setPriority(NotificationCompat.PRIORITY_LOW)
+                .setOngoing(true)
+                .setVibrate(null)
+                .setSound(null)
+                .setContentIntent(contentIntent);
+        startForeground(EMULATION_RUNNING_NOTIFICATION, builder.build());
+    }
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        return null;
+    }
+
+    @Override
+    public void onCreate() {
+        showRunningNotification();
+    }
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        return START_STICKY;
+    }
+
+    @Override
+    public void onDestroy() {
+        NotificationManagerCompat.from(this).cancel(EMULATION_RUNNING_NOTIFICATION);
+    }
+}