如何与AlarmManager一起启动通知？ [英] How to launch a notification in conjunction with AlarmManager?

问题描述

我正在尝试弄清楚如何启动通知。创建通知不是我要的，而是在后台启动通知的一种方法，这样通知就不会引起用户的干扰，用户也可以做任何事情。它的日历，提醒是确切的。注意我正在使用 AlarmManager 。

I am trying to figure out how I should launch a notification. Creating the notification is not what I am asking, but rather a way to launch it in the background so its unobtrusive and the user can do whatever they were doing. Its for a calendar, a reminder to be exact. It is also important to note I am using AlarmManager.

1. 我应该使用该方法在后台运行它。 BroadCastReciever ，服务等

我发现的研究还提出了 AlarmManager 的问题。当应用程序被杀死或手机被关闭时，警报也会响起。为了确保该事件提醒能够确保显示通知，我还应该使用其他什么方法？

Research I have found also presents a problem with AlarmManager. When the app is killed or phone is turned off, the alarm is also. What other method should I use in order to make sure the notification is guaranteed to show for that event reminder?

如果需要任何其他信息，请询问，我会这样做。

If any additional info is needed please ask and I shall do so. Thanks in advance.

推荐答案

创建广播接收器或intentservice。然后...

Create a broadcastreceiver or intentservice. Then...

AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);


Date date = new Date(); //set this to some specific time
or Calendar calendar = Calendar.getInstance();

//set either of these to the correct date and time. 

then 
Intent intent = new Intent();
//set this to intent to your IntentService or BroadcastReceiver
//then...
PendingIntent alarmSender = PendingIntent.getService(context, requestCode, intent,
                            PendingIntent.FLAG_CANCEL_CURRENT);
//or use PendingIntent.getBroadcast if you're gonna use a broadcast

                alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), mAlarmSender); // date.getTime to get millis if using Date directly. 

如果您希望即使重新启动电话后这些警报也能正常工作，请添加：

If you'd like these alarms to work correctly even when the phone is restarted, then add:

        <action android:name="android.intent.action.BOOT_COMPLETED"/>

作为清单中Receiver上的intentfilter，并在onReceive中重新创建警报。

as intentfilter on your Receiver in the manifest and recreate your alarms in onReceive.

编辑

在应用程序中创建BroadcastReceiver时，它可以做的听起来像是：在系统中接收广播。因此，例如，您可能会这样一些BroadcastReceiver：

When you create a BroadcastReceiver in your application, it allows to do exactly what it sounds like: receive broadcasts in the system. So for example, you might some BroadcastReceiver like so:

public class MyAwesomeBroadcastReceiver extends BroadcastReceiver {

//since BroadcastReceiver is an abstract class, you must override the following:

    public void onReceive(Context context, Intent intent) {
       //this method gets called when this class receives a broadcast
    }
}

要向此类明确发送广播，请定义接收器清单中的内容，如下所示：

To send broadcasts to this class explicitly, you define the receiver inside of the manifest, as follows:

<receiver android:name="com.foo.bar.MyAwesomeBroadcastReceiver" android:enabled="true" android:exported="false">
            <intent-filter>

                <action android:name="SOME_AWESOME_TRIGGER_WORD"/>
                <action android:name="android.intent.action.BOOT_COMPLETED"/>




            </intent-filter>
        </receiver>

清单中包含以下内容可为您带来两件事：您可以在任何时候将广播明确发送给接收者想要

Having this in the manifest gets you two things: You can send a broadcast explicitly to your receiver whenever you want by

Intent i = new Intent("SOME_AWESOME_TRIGGER_WORD");
                sendBroadcast(intent);

此外，由于您已告知android，您希望接收BOOT_COMPLETED操作，该操作由系统，发生这种情况时，您的接收方也会被呼叫。

Also, since you've told android you'd like to receive the BOOT_COMPLETED action which is broadcast by the system, your receiver will also get called when that happens.

这篇关于如何与AlarmManager一起启动通知？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！