Question

我一直使用以下代码每20秒触发一次警报

public class SchedulerSetupReceiver extends BroadcastReceiver {
private static final String APP_TAG = "LOG: ";


private static final int EXEC_INTERVAL = 20 * 1000;

@Override
public void onReceive(final Context ctx, final Intent intent) {
    Log.d(APP_TAG, "SchedulerSetupReceiver.onReceive() called");
    AlarmManager alarmManager = (AlarmManager) ctx
            .getSystemService(Context.ALARM_SERVICE);
    Intent i = new Intent(ctx, SchedulerEventReceiver.class); 
    PendingIntent intentExecuted = PendingIntent.getBroadcast(ctx, 0, i,
            PendingIntent.FLAG_CANCEL_CURRENT);
    Calendar now = Calendar.getInstance();
    now.add(Calendar.SECOND, 20);
    alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,
            now.getTimeInMillis(), EXEC_INTERVAL, intentExecuted);
}

}

代码按预期工作，我在LogCat中每20秒收到一次日志消息。

我想设置每日重复闹钟，每天上午10点开始。但是没有触发警报。我在上午10:00（例如9.59AM）之前更改了模拟器中的时间，然后运行代码。但是，警报不会在上午10:00触发。我还为警报设置了一个id。我还将模拟器中的日期更改为明天。根本没有发出警报。

为什么会出现这种情况的原因？

public class SchedulerSetupReceiver extends BroadcastReceiver {
private static final String APP_TAG = "LOG: ";
private static final int ALARM_ID_2000 = 2000;

//private static final int EXEC_INTERVAL = 20 * 1000;

@Override
public void onReceive(final Context ctx, final Intent intent) {
    Log.d(APP_TAG, "SchedulerSetupReceiver.onReceive() called");
    AlarmManager alarmManager = (AlarmManager) ctx
            .getSystemService(Context.ALARM_SERVICE);
    Intent i = new Intent(ctx, SchedulerEventReceiver.class);       
    PendingIntent intentExecuted = PendingIntent.getBroadcast(ctx, ALARM_ID_2000, i,
            PendingIntent.FLAG_CANCEL_CURRENT);

    Calendar cal = new GregorianCalendar();
    cal.setTimeInMillis(System.currentTimeMillis());

    Calendar updateTime = new GregorianCalendar();
    //we want to set a daily alarm at 10:00AM
    updateTime.add(Calendar.DAY_OF_YEAR, cal.get(Calendar.DAY_OF_YEAR));
    updateTime.set(Calendar.HOUR_OF_DAY,10);
    updateTime.set(Calendar.MINUTE,0);
    updateTime.set(Calendar.SECOND,0);
    updateTime.set(Calendar.MILLISECOND,0);
    updateTime.set(Calendar.DATE,cal.get(Calendar.DATE));
    updateTime.set(Calendar.MONTH,cal.get(Calendar.MONTH));

    alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,
            updateTime.getTimeInMillis(), AlarmManager.INTERVAL_DAY, intentExecuted);
}

我已经切换回旧代码，现在我还没有在启动时触发警报。我尝试过以下方法：

杀死亚行
重启eclipse
新模拟器

昨天正在使用20秒警报，但现在即使该代码也无效。

Answer 1

问题不是代码而是模拟器。设备视图下的应用程序未显示该过程。我期待在模拟器首次启动时触发警报，但是我必须重新启动仿真器，即从仿真器窗口打开和关闭设备以模仿重启。

模拟器“重新启动”后，警报会按预期启动。

Answer 2

尝试以下：

public class SchedulerSetupReceiver extends BroadcastReceiver {
private static final String APP_TAG = "LOG: ";
private static final int EXEC_INTERVAL = 20 * 1000;

@Override
public void onReceive(final Context ctx, final Intent intent) {
Log.d(APP_TAG, "SchedulerSetupReceiver.onReceive() called");
AlarmManager alarmManager = (AlarmManager) ctx
        .getSystemService(Context.ALARM_SERVICE);
Intent i = new Intent(ctx, SchedulerEventReceiver.class); 
PendingIntent intentExecuted = PendingIntent.getBroadcast(ctx, 0, i,
        PendingIntent.FLAG_CANCEL_CURRENT);
Calendar now = Calendar.getInstance();
now.setTimeInMillis(System.currentTimeMillis());
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,
        now.getTimeInMillis(), EXEC_INTERVAL, intentExecuted);
}
}

我在这里更改的是我添加了now.setTimeInMillis（System.currentTimeMillis（））;检索当前时间。还要确保已在清单中添加了接收器。

Android重复警报管理器未被解雇

2 个答案: