Question

我有使用日历和日期选择器设置的每周通知。但是，我尝试设置的此通知使用的是数据库中的日期，该日期已转换为毫秒。包含毫秒的变量用作触发提醒的时间。但是，它将不起作用。该代码不会引发任何错误，根本不会触发通知。我的代码如下。

MainActivity-用于触发通知

// Variable pulled from mysql with the app date
private String firstAppointment;

// Date of first app converted from String to Date format
private Date dateOfFirstAppointment;

// Date converted into milliseconds for the notification.
 private long appointmentInMilliseconds;

 /**
 * Method used to format the date from the MYSQL server
 */
private void getFirstAppointment() {

    String myDate = firstAppointment;
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

    try {
        dateOfFirstAppointment = sdf.parse(myDate);
        appointmentInMilliseconds = dateOfFirstAppointment.getTime();
    } catch (ParseException e) {
        e.printStackTrace();
    }
}

/**
 * Method which sets a weekly notification
 */
private void appointmentReminder() {

    AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
    Intent intent = new Intent(this, AlertReceiver2.class);
    PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 5, intent, 0);

    alarmManager.setExact(AlarmManager.RTC_WAKEUP, appointmentInMilliseconds, pendingIntent);
    alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, appointmentInMilliseconds, AlarmManager.INTERVAL_DAY * 7, pendingIntent);
    Toast.makeText(this, "Appointment Reminder Set", Toast.LENGTH_SHORT).show();
}

通知类别：

public class NotificationHelperChannel2 extends ContextWrapper {

public static final String channe2ID = "channe2ID";
public static final String channe2Name = "Channe2 Name";

private NotificationManager mManager;

public NotificationHelperChannel2(Context base) {
    super(base);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        createChannel();
    }
}

@TargetApi(Build.VERSION_CODES.O)
private void createChannel() {
    NotificationChannel channel = new NotificationChannel(channe2ID, channe2Name, NotificationManager.IMPORTANCE_HIGH);

    getManager2().createNotificationChannel(channel);
}

public NotificationManager getManager2() {
    if (mManager == null) {
        mManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    }

    return mManager;
}

public NotificationCompat.Builder getChannelNotification2() {
    return new NotificationCompat.Builder(getApplicationContext(), channe2ID)
            .setContentTitle("Appointment Reminder")
            .setContentText("You have an appointment tomorrow")
            .setSmallIcon(R.drawable.ic_notification_icon)
            .setLargeIcon(icon)
            .setPriority(NotificationCompat.PRIORITY_HIGH)
            .setCategory(NotificationCompat.CATEGORY_MESSAGE)
            .setVibrate(new long []{1000, 1000})
            .setLights(Color.RED, 3000, 3000)
            .setAutoCancel(true);

}

Bitmap icon = BitmapFactory.decodeResource(this.getResources(),
        R.drawable.brain_meditate_icon);
}

警报接收器类别：

public class AlertReceiver2 extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {

    NotificationHelperChannel2 notificationHelper2 = new NotificationHelperChannel2(context);
    NotificationCompat.Builder nb2 = notificationHelper2.getChannelNotification2();
    notificationHelper2.getManager2().notify(2, nb2.build());
}

}

Answer 1

在不同的Android操作系统中，通知具有不同的处理方式。可能由于您使用的是Pie，Oreo或至少需要特殊处理的Nougat Android，该警报无法正常工作

这是我在Oreo，Pie和牛轧糖中处理通知的代码。

可能会帮助您。

      NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
            int notificationId = 1;
            String channelId = "channel-01";
            String channelName = "Channel Name";
            int importance = NotificationManager.IMPORTANCE_HIGH;

            if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
                NotificationChannel mChannel = new NotificationChannel(
                        channelId, channelName, importance);
                notificationManager.createNotificationChannel(mChannel);
            }

            NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context, channelId)
                    .setSmallIcon(R.drawable.ic_check)
                    .setContentTitle("Branch Checklist")
                    .setContentText(resultValue)
                    .setVibrate(new long[]{100, 250})
                    .setStyle(new NotificationCompat.BigTextStyle()
                                    .bigText(resultValue));

//        TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);
//        stackBuilder.addNextIntent(intent);
//        PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(
//                0,
//                PendingIntent.FLAG_UPDATE_CURRENT
//        );
//        mBuilder.setContentIntent(resultPendingIntent);

            notificationManager.notify(notificationId, mBuilder.build());

Android Studio设置通知提醒（每周一次）-应用前一天

1 个答案: