警报管理器立即触发 [英] Alarm manager triggered immediately

问题描述

我目前正在使用AlarmManager。我写了下面给出的代码。根据代码，AlarmManager应该在10秒后触发，但是在我的代码中，警报管理器会立即触发。请帮忙。

Hi I am currently working with AlarmManager. I have written a code given below. As per code the AlarmManager should be triggered after 10 Sec, but here in my code the alarm manager triggers immediately. Please help.

public class MainActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        AlarmManager alarmManager = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
        int alarmType = AlarmManager.ELAPSED_REALTIME_WAKEUP;
        long timeOrLengthofWait = 10000;
        Intent intentToFire = new Intent(this, AlarmReciever.class);
        PendingIntent alarmIntent = PendingIntent.getBroadcast(this, 0, intentToFire, 0);
        alarmManager.set(alarmType, timeOrLengthofWait, alarmIntent);
    }
}

我的AlarmReciever类别

And My AlarmReciever Class

public class AlarmReciever extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {

        String phoneNumberReciever="5556";
        String message="Alarm Triggered";
        SmsManager sms = SmsManager.getDefault(); 
        sms.sendTextMessage(phoneNumberReciever, null, message, null, null);
        Toast.makeText(context," A message has been sent", Toast.LENGTH_LONG).show();

        Log.d("Alarm ", "Alarm Has been triggered and sms send");
    }
}

我已经在清单中添加了必需的权限。

I have Already added required permissions in manifest.

推荐答案

您使用的警报类型为 ELAPSED_REALTIME_WAKEUP 。这意味着 set（）的第二个参数必须是从现在起的毫秒数，现在表示为 SystemClock.elapsedRealtime（）。

You are using an alarm type of ELAPSED_REALTIME_WAKEUP. That means that the second parameter to set() must be the number of milliseconds from now, where now is expressed as SystemClock.elapsedRealtime().

如果您的目标是从创建 set（）调用，则 set（）调用应为：

If your goal is to have this occur 10000 milliseconds from the time you make the set() call, that set() call should be:

alarmManager.set(alarmType, SystemClock.elapsedRealtime()+timeOrLengthofWait, alarmIntent);

这篇关于警报管理器立即触发的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！