在Xamarin.android中的后台服务中每五秒钟显示一次吐司消息

Question

I have implemented a background service. When I boot my device, the background service is started and toast message is displayed. I want a toast message to appear each 5 seconds while the service in running. The following code does not seem to be doing the job:

[Service]
    public class BroadcastService : Service
    {
        IBinder mBinder;

        [return: GeneratedEnum]
        public override StartCommandResult OnStartCommand(Intent intent, [GeneratedEnum] StartCommandFlags flags, int startId)
        {

            Toast.MakeText(this, "BroadcastService Started...", ToastLength.Long).Show();

            DoWork();

            base.OnStartCommand(intent, flags, startId);
            return StartCommandResult.Sticky;


        }

public void DoWork()
{
    while (true)
    {
        Toast.MakeText(this, "BroadcastService is running at each 5 seconds...", ToastLength.Long).Show();
        Thread.Sleep(5000);
    }
}

Can somebody please advise what is wrong above and help to achieve this in Xamarin.android ?

Answer 1

I want a toast message to appear each 5 seconds while the service in running. The following code does not seem to be doing the job

Once OnStartCommand finish executing, DoWork won't execute any more.

According to your requirement, you need to use JobScheduler together with JobInfo to create a periodic task. For how to use JobScheduler, You can refer to the official demo of JobScheduler