警报管理器不重复吗？

Question

因此，我编写了一个代码，其中警报管理器应在准确的时间触发并每分钟重复一次，并且它部分起作用，第一次触发，但在给定间隔（一分钟）后不再重复。

主要活动：

   public void SetAlarm()
{
    final Button button = findViewById(R.id.button); // replace with a button from your own UI
    BroadcastReceiver receiver = new BroadcastReceiver() {
        @Override public void onReceive( Context context, Intent _ )
        {
            Toast.makeText(context, "Nope", Toast.LENGTH_SHORT).show();
            context.unregisterReceiver( this ); // this == BroadcastReceiver, not Activity
        }
    };

    Calendar cal = Calendar.getInstance();
    cal.set(Calendar.HOUR_OF_DAY, 20);
    cal.set(Calendar.MINUTE, 30);
    cal.set(Calendar.SECOND, 0);

    this.registerReceiver( receiver, new IntentFilter("com.blah.blah.somemessage") );

    PendingIntent pintent = PendingIntent.getBroadcast( this, 0, new Intent("com.blah.blah.somemessage"), 0 );
    AlarmManager manager = (AlarmManager)(this.getSystemService( Context.ALARM_SERVICE ));

    // set alarm to fire 5 sec (1000*5) from now (SystemClock.elapsedRealtime())
    manager.setInexactRepeating( AlarmManager.RTC_WAKEUP, cal.getTimeInMillis() + 1000*5, 6000, pintent );
}

public void klik(View view) {
    SetAlarm();
}

}

Answer 1

尝试使用setRepeating。

manager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
                cal.getTimeInMillis() + 1000*5, 6000, pintent );

有关最佳做法，您可以参考此文档-https://developer.android.com/training/scheduling/alarms

Answer 2

用途：

manager.setRepeating( AlarmManager.RTC_WAKEUP, cal.getTimeInMillis() + 1000*5, 6000, pintent );

而不是：

  manager.setInexactRepeating( AlarmManager.RTC_WAKEUP, cal.getTimeInMillis() + 1000*5, 6000, pintent );

Answer 3

为了安全起见，我认为以毫秒为单位的最小重复次数是15000：]