如何在 android 中创建多个本地通知

Question

在我的 android 应用中，我需要在特定的一天以不同的时间间隔显示多个本地通知，我使用警报管理器和广播接收器来处理一个通知，但是当我试图实现多个通知时只显示了第二个

这是我的 MainActivity

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

    Intent notificationIntent = new Intent("android.media.action.DISPLAY_NOTIFICATION");
    notificationIntent.addCategory("android.intent.category.DEFAULT");

    PendingIntent broadcast = PendingIntent.getBroadcast(this, 100, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);

    Calendar cal = Calendar.getInstance();
    cal.set(2015, 10, 23, 15, 03);
    alarmManager.setExact(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), broadcast);

这里是BroadcastReceiver

Intent notificationIntent = new Intent(context, MainActivity.class);

    TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);
    stackBuilder.addParentStack(MainActivity.class);
    stackBuilder.addNextIntent(notificationIntent);

    PendingIntent pendingIntent1 = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);

    NotificationCompat.Builder builder = new NotificationCompat.Builder(context);

    Notification notification = builder.setContentTitle("TRR - 2016")
            .setContentText("Station - 1 closed grace period only 10min")
            .setTicker("New Message Alert!")
            .setSmallIcon(R.mipmap.ic_launcher)
            .setDefaults(Notification.DEFAULT_SOUND)
            .setContentIntent(pendingIntent1).build();

    NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
    notificationManager.notify(mCounter, notification);

Notification notification1 = builder.setContentTitle("TRR - 2016")
            .setContentText("Station - 2 closed grace period only 10min")
            .setTicker("New Message Alert!")
            .setSmallIcon(R.mipmap.ic_launcher)
            .setDefaults(Notification.DEFAULT_SOUND)
            .setContentIntent(pendingIntent1).build();

    NotificationManager notificationManager1 = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
    notificationManager1.notify(++mCounter, notification1);

Answer 1

每个通知必须有自己的通知 ID。

你的问题在这里：

notificationManager.notify(0, notification);

具体来说，“0”是通知的 ID。如果您不提供不同的 ID，Android 会认为您只是在更新已经存在的通知。

Documentation.

public void notify (int id, Notification notification)

Post a notification to be shown in the status bar. If a notification with the same id has already been posted by your application and has not yet been canceled, it will be replaced by the updated information.

您可以尝试这样的操作：

private int mCounter = 0;

...

notificationManager1.notify(++mCounter, notification1);

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