Run services in background every hour even if the app has been closed

Question

I am trying to run a service to check the network status. I need to check this every hour, even if the app has been force closed form the recent app tray. I have created the service and it works on load and runs once. Not sure how to run it every hour and after its been closed.

Service

using System;
using System.IO;
using Android.App;
using Android.Content;
using Android.Net;
using Android.OS;
using Android.Widget;

namespace example.Services
{
    [Service(Label = "NetworkService")]
    [IntentFilter(new String[] { "com.example.NetworkService" })]
    public class NetworkService : Service
    {
    IBinder binder;

    public override StartCommandResult OnStartCommand(Android.Content.Intent intent, StartCommandFlags flags, int startId)
    {

        // start your service logic here
        string filename = "network.txt";
        var documentsPath = System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal);
        var filePath = Path.Combine(documentsPath, filename);

        if(!File.Exists(filePath))
            File.Create(filePath);

        ConnectivityManager connectivityManager = (ConnectivityManager)GetSystemService(ConnectivityService);
        NetworkInfo networkInfo = connectivityManager.ActiveNetworkInfo;
        bool isOnline = networkInfo.IsConnected;

        if(isOnline)
        {
            File.WriteAllText(filePath, "Connected");
        }
        else
        {
            File.WriteAllText(filePath, "Not Connected");
        }
            return StartCommandResult.Sticky;
        }

        public override IBinder OnBind(Intent intent)
        {
            binder = new NetworkServiceBinder(this);
            return binder;
        }
    }

    public class NetworkServiceBinder : Binder
    {
        readonly NetworkService service;

        public NetworkServiceBinder(NetworkService service)
        {
            this.service = service;
        }

        public NetworkService GetNetworkService()
        {
        return service;
        }
    }
}

Manifest

<service android:enabled="true" android:name="com.example.NetworkService" />

MainActivity

using Android.App;
using Android.Content;
using Android.OS;
using Android.Widget;

namespace whitesrecycling.Activities
{
    [Activity(Label = "HomeActivity")]
    public class HomeActivity : Activity
    {
        protected override void OnStart()
        {
            base.OnStart();

            StartService(new Intent(this, typeof(Services.NotifcationService)));
            StartService(new Intent(this, typeof(Services.NetworkService)));
        }
        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);

            SetContentView(Resource.Layout.Home);
            var toolbar = FindViewById<Toolbar>(Resource.Id.toolbar);
            SetActionBar(toolbar);
            ActionBar.Title = "Example";

        }
    }
}

What is your target version? You need integrate some things. I hope my answer can give you a way. — Robbit, Jan 24 '18 at 15:27
API 19, i added in this ` Intent alarmIntent = new Intent(this, typeof(AlarmReceiver)); var pending = PendingIntent.GetBroadcast(this, 0, alarmIntent, PendingIntentFlags.UpdateCurrent); var alarmManager = GetSystemService(AlarmService).JavaCast(); alarmManager.SetRepeating(AlarmType.ElapsedRealtime,0, SystemClock.ElapsedRealtime() + 5 * 1000, pending);` — Gurpreet Bhopal, Jan 24 '18 at 15:42
Api19, 4.4, you can only use `AlarmManager` in your project. — Robbit, Jan 24 '18 at 15:47

score 0 · Accepted Answer · answered Jan 24 '18 at 10:01

Like @pskink has said, you can use AlarmManager, and you also can use JobScheduler.

Here is the usage of AlarmManager, and here is the use of JobScheduler.

Some suggestions:

If Api<19, please use AlarmManager.
If Api>21, please use JobScheduler.

In Android, you can't keep your app alive always, because it will consume much power.

Run services in background every hour even if the app has been closed

1 Answers1