Notification AlarmManager问题

Question

我有三个问题：

1)到目前为止，我已经实现了：

public final class CalculateTime {

    public int iHour;
    public int iMinute;
    public Calendar calendar;

    private void calculateRandomNumbers() {
        Random randomNumberGenerator = new Random();
        iHour = randomNumberGenerator.nextInt(19 - 9) + 9;
        iMinute = randomNumberGenerator.nextInt(59);
    }

    public void calculateRandomTime() {
        calculateRandomNumbers();
        calendar = GregorianCalendar.getInstance();
        calendar.setTime(new Date());
        calendar.set(Calendar.HOUR_OF_DAY, iHour);
        calendar.set(Calendar.MINUTE, iMinute);
    }
}

因此，通知应该在9点到19点之间的任何时间推送一次。但是通知在9点到19点之间发送了两次。

2)计算完成后，立即推送通知。

3)我想每周发送一次通知，该如何实现？我试过了：

// For Monday
calendar.set(Calendar.DAY_OF_WEEK, 2)

但我不确定这是否正确，因为我不能轻易地测试它。(我不能每次都等一个星期！) :/

更多代码，设置闹钟：

public final class NotificationService extends IntentService {

    public static final String DESCRIPTION = "description";
    public static final String HEADLINE = "headline";

    private static final int FM_NOTIFICATION_ID = 0;

    public NotificationService() {
        super("NotificationService");
    }

    @Override
    protected void onHandleIntent(Intent intent) {
        /*
         * This method is invoked whenever an intent for this service is fired.
         * The actual firing is done by the AlarmManager in the
         * TodoEntriesAdapter, but really we don't care at this point where
         * exactly the intent came from.
         */
        String description = intent.getStringExtra(DESCRIPTION);
        String headline = intent.getStringExtra(HEADLINE);

        addNotification(description, headline);
    }

    private void addNotification(String description, String headline) {

        NotificationCompat.Builder builder =
            new NotificationCompat.Builder(this)
            .setSmallIcon(R.drawable.ic_launcher)
            .setContentTitle(headline)
            .setContentText(description)
            .setAutoCancel(true);

        Intent notificationIntent = new Intent(this, ReadNotification.class);
        notificationIntent.putExtra("description", description);
        notificationIntent.putExtra("headline", headline);

        PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent,   
            PendingIntent.FLAG_UPDATE_CURRENT);
            builder.setContentIntent(contentIntent);

        // Add as notification  
        NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);  
        manager.notify(FM_NOTIFICATION_ID, builder.build());  
        }
    }

Answer 1

1. 通知发送两次。

查看实际与AlarmManager交互的代码会很有帮助。如果您显示所选的时间(例如，使用日志记录工具)，您将能够看到哪个通知是正确的，以及调度警报的代码是否被调用了两次。

1. 当计算已过去时，将立即推送通知。

这是documented behaviour。您将需要手动检查时间是否为过去的时间，如果是，则将其向前移动一周。

1. 我想每周发送一次通知。

试试setRepeating(type, start, 7 * AlarmManager.INTERVAL_DAY, operation)。

我不能轻易地测试它。

除了手动更改手机日期的原始方法之外，您还可以通过模拟AlarmManager类来测试应用程序(用一个检查使用正确的参数调用正确的方法的伪类替换它)。