Android: establish a service with foreground notification

shell/android-studio/reicast/src/main/AndroidManifest.xml

@@ -121,6 +121,12 @@
             android:configChanges="orientation|navigation|screenSize|screenLayout|uiMode|keyboard|keyboardHidden"
             android:screenOrientation="sensorLandscape"
             android:theme="@android:style/Theme.NoTitleBar.Fullscreen" />
+
+        <service
+            android:name=".emu.EmuService"
+            android:configChanges="orientation"
+            android:enabled="true"
+            android:exported="true" />
     </application>
 
 </manifest>

shell/android-studio/reicast/src/main/java/com/reicast/emulator/emu/EmuService.java

@@ -0,0 +1,47 @@
+package com.reicast.emulator.emu;
+
+import android.app.PendingIntent;
+import android.app.Service;
+import android.content.Intent;
+import android.os.IBinder;
+import android.support.v4.app.NotificationCompat;
+import com.reicast.emulator.R;
+
+public class EmuService extends Service {
+
+    private final static int FOREGROUND_ID = 999;
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        return null;
+    }
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        if (intent != null && intent.getAction() != null
+                && intent.getAction().equals("com.reicast.emulator.KYS")) {
+            stopSelf();
+        } else {
+            Intent intentService = new Intent(this, EmuService.class);
+            intentService.setAction("com.reicast.emulator.KYS");
+            PendingIntent pendingIntent = PendingIntent.getService(this,
+                    (int) System.currentTimeMillis(), intentService,
+                    PendingIntent.FLAG_UPDATE_CURRENT);
+
+            NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
+                    .setSmallIcon(R.drawable.ic_launcher)
+                    .setTicker("Emulator ticker message")
+                    .setContentTitle("Emulator notification title")
+                    .setContentText("Emulator notification content")
+                    .setContentIntent(pendingIntent);
+            startForeground(FOREGROUND_ID, builder.build());
+            return START_STICKY_COMPATIBILITY;
+        }
+        return START_NOT_STICKY;
+    }
+
+    @Override
+    public void onDestroy() {
+        stopForeground(true);
+    }
+}