Android Timer or Service

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Android Timer or Service

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#1 by (3 votes)

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Hello with all I have an application that works with a database, I want to execute a query in the base like the one that I leave later, the detail is that this method (query) should only be executed at 7:30 of the Tomorrow every day someone can help me with this problem.

Thank you in advance for the help

public void borrarRegistros(){
    String consulta="delete from registros"; //borrar todos los registros de la tabla registros
    MainActivity.adapter.openSqliteDataBaseInDevice();
    try {
        Cursor c=MainActivity.adapter.get_sqliteDB().rawQuery(consulta,null);
        c.moveToFirst();
        c.close();
    }catch (Exception ex){
    }
    MainActivity.adapter.closeSqliteDataBaseInDevice();
}

java android android-sqlite

asked by Kevtho 22.10.2016 в 07:02

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1 answer

Delete events from the document element if online php does not work

score 3 · Accepted Answer

The ideal for your case is neither, at least the service is not directly. You need to use the AlarmManager , which ensures you "wake up" your application, even if it is not running, and using a intent , shoot the action or query you need! More info here " Recurring Alarms ". The alarm service can wake up a service and make the query in the background.

Example of use:

private AlarmManager alarmMgr;
private PendingIntent alarmIntent;
...
alarmMgr = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(context, QueryService.class);
alarmIntent = PendingIntent.getBroadcast(context, 0, intent, 0);

// Poner alarma para comenzar a las 7:30 a.m.
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, 7);
calendar.set(Calendar.MINUTE, 30);

// setRepeating() permite definir el intervalo de repetición
long unDia = 1000 * 60 * 60 * 24;
alarmMgr.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
    unDia, alarmIntent);