我正在尝试在特定时间创建通知。我正在创建一个广播接收器并通过 AlarmManager 调用它。问题是没有收到广播，我也没有收到任何通知。

在 list 中注册广播接收器，

<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());
    }

}

创建警报的主 Activity 代码。

/**
     * 
     * @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);
    }

任何人都可以指出并纠正我做错了什么吗？谢谢。

最佳答案

您在 list 中对接收器的定义有误。

试试这个:

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

在 android:name 中，您必须指定接收器的绝对包+类，或者您指定的 package="com.example.android" 中的相关类在 list 的根元素中。例如:

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

接收器的 Action 部分用于指定要监听的 Action 。所以你也可以这样做:

根据 Action 而不是类创建 Intent

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 Action :

@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 list 中声明您的接收者:

<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。

关于android - 通过警报管理器在特定时间创建通知，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/19964349/