如何在Alarmmanager中运行asynctask？

Question

I have an asynctask which consumes a webservice. Now I need to execute the asynctask once a day, at a certain hour. What I want to do is call doinbackground event of the asynctask inside the AlarmManager. I have read about using AlarmManager but there is no documentation about using it with asynctask. Am I going to the right direction? Any advice will highly apreciate

Answer 1

Step1: Create an alarm manager which runs once in a day. Time you can set according to your requirements. Here I set it at 7am.

int REPEATING_TIME = 24 * 60 * 60 * 1000;
        Calendar calendar = Calendar.getInstance();
        calendar.setTimeInMillis(System.currentTimeMillis());
        calendar.set(Calendar.HOUR_OF_DAY, 06);
        calendar.set(Calendar.MINUTE, 59);
        calendar.set(Calendar.SECOND, 59);

        Intent i = new Intent(context, DemoService.class);
        PendingIntent pi = PendingIntent.getService(context,
                202, i,
                PendingIntent.FLAG_CANCEL_CURRENT);

        AlarmManager alarmManager = (AlarmManager) context
                .getSystemService(Context.ALARM_SERVICE);
        alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,
                calendar.getTimeInMillis(), REPEATING_TIME, pi);

Step 2 : Create an asynctask class and do the background operation there you want to perform.

public class LoadData extends AsyncTask<String, String, String>{

    @Override
    protected String doInBackground(String... params) {

        return "response";
    }

}

Step 3 : Create a class which extends the Service.

    public class DemoService extends Service {

        @Override
        public void onCreate() {
            super.onCreate();

        }

        @Override
        public int onStartCommand(Intent intent, int flags, int startId) {
            new LoadData(){}protected void onPostExecute(String result){
// anything you want to perform onPost.
};}.execute("API URL");

            stopSelf();
            return super.onStartCommand(intent, flags, startId);
        }

        @Override
        public IBinder onBind(Intent intent) {
            return null;
        }

    }

Hope it will solve your problem.