通过警报管理器在特定时间创建通知 [英] Creating a Notification at a particular time through Alarm Manager

问题描述

我正在尝试在特定时间创建通知.我创建了一个广播接收器并通过 AlarmManager 调用它.问题是没有收到广播并且我没有收到任何通知.

I am trying to create a notification at a particular time. Im creating a broadcast receiver and calling it through the AlarmManager. Problem is that the broadcast is not received and that I am not getting any notifications.

在清单中注册广播接收器，

Registering the Broadcast Receiver in the Manifest,

<receiver
        android:name="com.example.android.receivers">
        <intent-filter>
            <action android:name="com.example.android.receivers.AlarmReceiver" />
        </intent-filter>
    </receiver>

这是广播接收器，

public class AlarmReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context pContext, Intent pIntent) {

//      if (pIntent.getAction().equalsIgnoreCase("")) {
//          
//      }
        Log.d("Alarm Receiver", "onReceive called");        
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(pContext).setSmallIcon(R.drawable.icon).setContentTitle("Test Notification")
                        .setContentText("Test Notification made by Syed Ahmed Hussain");
        Intent resultIntent = new Intent(pContext, CalendarView.class);

        // The stack builder object will contain an artificial back stack for the
        // started Activity.
        // This ensures that navigating backward from the Activity leads out of
        // your application to the Home screen.
        TaskStackBuilder stackBuilder = TaskStackBuilder.create(pContext);
        // Adds the back stack for the Intent (but not the Intent itself)
        stackBuilder.addParentStack(CalendarView.class);
        // Adds the Intent that starts the Activity to the top of the stack
        stackBuilder.addNextIntent(resultIntent);
        PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
        notificationBuilder.setContentIntent(resultPendingIntent);
        NotificationManager mNotificationManager = (NotificationManager) pContext.getSystemService(Context.NOTIFICATION_SERVICE);
        mNotificationManager.notify(1, notificationBuilder.build());
    }

}

来自主要活动的代码，用于创建警报.

Code from Main Activity which creates an Alarm.

/**
     * 
     * @param pDate
     * @param pTime
     */
    private void createNotification(String pDate, String pTime) {
        AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
        Intent intent = new Intent(this, AlarmReceiver.class);
        PendingIntent alarmIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
//      alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, SystemClock.elapsedRealtime() + 60 * 1000, alarmIntent);
        alarmManager.set(AlarmManager.RTC_WAKEUP, Calendar.getInstance().getTimeInMillis(), alarmIntent);
    }

谁能指出并纠正我做错了什么?谢谢.

Can anyone please point out and rectify what am I doing wrong? Thank you.

推荐答案

您在 Manifest 中对 Receiver 的定义有误.

You have a wrong definition of the Receiver in your Manifest.

试试这个:

<receiver android:name="com.example.android.receivers.AlarmReceiver" />

在android:name中你必须指定接收者的绝对包+类，或者你指定的package="com.example.android"的相对在清单的根元素中.例如:

in android:name you have to specify the absolute package+class of the receiver, or the relative from the package="com.example.android" you specified in the root element of the Manifest. e.g:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.android" >

<小时>

接收器的操作部分将指定要侦听的操作.所以你也可以这样做:

---

Action sections of receivers are to specify which actions to listen. So you can also do it this way:

基于 Action 而不是类创建 Intent

Create an Intent based on the Action instead of the class

public static final String ACTION = "com.example.android.receivers.NOTIFICATION_ALARM";

private void createNotification(String pDate, String pTime) {
    AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
    Intent intent = new Intent(ACTION);
    PendingIntent alarmIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
    alarmManager.set(AlarmManager.RTC_WAKEUP, Calendar.getInstance().getTimeInMillis(), alarmIntent);
}

然后你可以在你的接收器中处理多个动作:

Then you can handle multiple actions in your receiver:

@Override
public void onReceive(Context pContext, Intent pIntent){
        if (pIntent.getAction().equals(ACTION)){
            // Here your handle code
        }
}

但是，您必须以这种方式在清单中声明您的接收者:

But then, you will have to declare your receiver in the manifest this way:

<receiver android:name="com.example.android.receivers">
    <intent-filter>
        <action android:name="com.example.android.receivers.NOTIFICATION_ALARM" />
    </intent-filter>
</receiver>

两种方式都可以使用.

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