Improved android networking

android-project/app/src/main/java/com/erroratline0/infinipaint/InfiniPaint.java

@@ -19,6 +19,7 @@
 package com.erroratline0.infinipaint;
 
 import android.content.Context;
+import android.content.Intent;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.Handler;
@@ -142,4 +143,10 @@ public class InfiniPaint extends SDLActivity {
     static public void updateTextboxAndCursorPos(String str, int selectionBegin, int selectionEnd) {
         mSingleton.commandHandler.post(new InfiniPaintUpdateTextboxAndCursorPosTask(str, selectionBegin, selectionEnd));
     }
+    static public void startNetworkService() {
+        mSingleton.startForegroundService(new Intent(mSingleton, InfiniPaintNetworkService.class));
+    }
+    static public void stopNetworkService() {
+        mSingleton.stopService(new Intent(mSingleton, InfiniPaintNetworkService.class));
+    }
 }

android-project/app/src/main/java/com/erroratline0/infinipaint/InfiniPaintNetworkService.java

@@ -0,0 +1,58 @@
+package com.erroratline0.infinipaint;
+
+import android.app.ForegroundServiceStartNotAllowedException;
+import android.app.Notification;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.app.Service;
+import android.content.Intent;
+import android.content.pm.ServiceInfo;
+import android.os.Build;
+import android.os.IBinder;
+import android.view.KeyEvent;
+
+
+public class InfiniPaintNetworkService extends Service {
+    public static native void networkServiceStarted();
+    public static native void networkServiceDestroyed();
+
+    private static final String CHANNEL_ID = "NetworkServiceChannel";
+
+    @Override
+    public void onCreate() {
+        createNotificationChannel();
+    }
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        Notification notification = new Notification.Builder(this, CHANNEL_ID)
+                .setContentTitle("Online canvas")
+                .setContentText("Currently online")
+                .build();
+        startForeground(1, notification);
+        networkServiceStarted();
+        // For now, don't try restarting the connection after we've been disconnected
+        return START_NOT_STICKY;
+    }
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        // We don't provide binding, so return null
+        return null;
+    }
+
+    @Override
+    public void onDestroy() {
+        networkServiceDestroyed();
+    }
+
+    private void createNotificationChannel() {
+        NotificationChannel serviceChannel = new NotificationChannel(
+                CHANNEL_ID,
+                "Network Service Channel",
+                NotificationManager.IMPORTANCE_DEFAULT
+        );
+        NotificationManager manager = getSystemService(NotificationManager.class);
+        manager.createNotificationChannel(serviceChannel);
+    }
+}