I'm a new to android, so I'm trying to develop an application that shows a notification to the user after specific time, I don't know: Is it possible to use a dialog box inside Service ! or not !...

My Goal is: to ask him a question after specific time, as shown below in my code, 

```
import android.app.AlertDialog;
import android.app.Service;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.IBinder;
import android.widget.Toast;

public class MyAlarmService extends Service {

    @Override
    public void onCreate() {
        Toast.makeText(this, "MyAlarmService.onCreate()", Toast.LENGTH_LONG)
                .show();
    }

    @Override
    public IBinder onBind(Intent intent) {
        Toast.makeText(this, "MyAlarmService.onBind()", Toast.LENGTH_LONG)
                .show();
        return null;
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        Toast.makeText(this, "MyAlarmService.onDestroy()", Toast.LENGTH_LONG)
                .show();
    }

    @Override
    public void onStart(Intent intent, int startId) {
        super.onStart(intent, startId);
        Toast.makeText(this, "MyAlarmService.onStart()", Toast.LENGTH_LONG)
                .show();
        // For Notification
        final AlertDialog alertDialog = new AlertDialog.Builder(this).create();
        alertDialog.setTitle("Conformation");
        alertDialog
                .setMessage("Are you sure you want to Expand Report Region?");
        alertDialog.setButton("Yes", new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {
                // Sending a Message to server that the plaintiff wants to
                // expand report region
            }
        });
        alertDialog.setButton2("No", new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {
                // Do nothing
            }
        });
    }
}

```

Also I don't know shall I use Service or BroadcastReceiver ?? 

any suggestion, thanks in advance =)