android – AlarmManager不重复

我正在编写一个“简单”的通知器,其中包括调用网站,检查响应并通知是否有新内容.

我正在使用服务来执行http操作,我希望AlarmManager以给定的频率重复调用服务.我一直在检查像this这样的教程和其他示例,因为我希望每当用户离开设置屏幕(到目前为止唯一的Activity)并且在BOOT完成之后安排服务,所以我创建了一个类到包装调度代码.

public class Scheduler {

public static boolean cancelScheduledService(Context ctx, Intent serviceIntent) {
    boolean success = true;
    Log.v("novUmbria", "Scheduler.cancelScheduledService");
    try {
        AlarmManager am = (AlarmManager) ctx.getSystemService(Context.ALARM_SERVICE);
        am.cancel(
                PendingIntent.getBroadcast(
                        ctx, 0,
                        new Intent(ctx, NotificadorService.class),
                        // si ya existe, no genera un 2º
                        PendingIntent.FLAG_CANCEL_CURRENT
                        )

                );
        Log.v("novUmbria", "Scheduler.cancelScheduledService Servicio cancelado");
    } catch (Exception e) {
        Log.e("novUmbria", "Scheduler.cancelScheduledService Excepción: " + e.getMessage());
        success = false;
    }
    return success;
}

public static boolean scheduleService(Context ctx, Intent serviceIntent, long interval) {
    boolean success = true;
    Log.v("novUmbria", "Scheduler.scheduleService Servicio ");
    try {
        Calendar cal = Calendar.getInstance();
        SimpleDateFormat timeformat = new SimpleDateFormat("HH:mm");
        // timeformat.setTimeZone(TimeZone.getTimeZone("Europe/Madrid"));

        AlarmManager am = (AlarmManager) ctx.getSystemService(Context.ALARM_SERVICE);
        am.setRepeating(
                // am.setInexactRepeating(
                // AlarmManager.ELAPSED_REALTIME_WAKEUP,
                AlarmManager.RTC_WAKEUP,
                cal.getTimeInMillis(),
                interval,
                PendingIntent.getBroadcast(
                        ctx, 0,
                        new Intent(ctx, NotificadorService.class),
                        // si ya existe, no genera un 2º
                        PendingIntent.FLAG_CANCEL_CURRENT
                        )

                );
        Log.v("novUmbria", "Scheduler.scheduleService Servicio programado a las "
                + timeformat.format(cal.getTime())
                + " cada " + (interval / 60000) + " minutos"
                );

        startService(ctx, serviceIntent);
        Log.v("novUmbria", "Scheduler.scheduleService Servicio iniciado"
                );

    } catch (Exception e) {
        Log.e("novUmbria", "Scheduler.scheduleService Excepción: " + e.getMessage());
        success = false;
    }
    return success;
}

public static boolean startService(Context ctx, Intent serviceIntent) {
    boolean success = true;
    Log.v("novUmbria", "Scheduler.startService");
    try {
        ctx.startService(serviceIntent);
        Log.v("novUmbria", "Scheduler.startService Servicio iniciado");
    } catch (Exception e) {
        Log.e("novUmbria", "Scheduler.startService Excepción: " + e.getMessage());
        success = false;
    }
    return success;
}

}

这是从设置Activity调用调度程序

//Settings Activity
 @Override
protected void onStop() {
    Log.v("novUmbria", "SettingsActivity.onStop");
    Intent serviceIntent = new Intent(getApplicationContext(), NotificadorService.class);
    Scheduler.cancelScheduledService(getApplicationContext(), serviceIntent);
    long frequency = 1000 * 60 / 2;
    Scheduler.scheduleService(getApplicationContext(),
            serviceIntent,
            frequency
            );
    Log.v("novUmbria", "SettingsActivity.onStop scheduleService");
    super.onStop();
}

事情是：logcat告诉我服务被调度(或者,更好的说,它不会引发异常)并且它第一次被执行.但是,在那之后,无论间隔多长或多短,它都不会重复.我已经尝试了几个标志RTC,RTC_WAKEUP,ELAPSED_REALTIME等,但我什么也没得到.

我的测试设备是Nexus 4全面更新.我甚至重新启动它,所以我检查了BOOT_COMPLETE接收器工作正常,但它从不重复服务调用.

关于问题在哪里的任何想法？

提前致谢.

解决方法:

我找到了答案here.

显然,当您想要安排SERVICE时,不要使用PendingIntent.getBroadcast而是使用PendingIntent.getService.

只是那个小小的改变,它正在重复它应该.

希望这有助于别人:)

标签：android,service,alarmmanager,android-alarms,repeatingalarm
来源： https://codeday.me/bug/20190529/1176914.html