android 特定日期的通知

Question

我正在寻找可以在我不知道的日期和时间发出通知的代码，因此用户将确定日期，我必须在这一天到来时发送通知，如果用户点击重复必须重复，

我看到很多代码只是为了时间而不是日期任何人都可以帮助我修改它们以便我可以找到我正在寻找的东西吗？

这是我得到的代码。

MainActivity

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        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.add(Calendar.SECOND, 15);
        alarmManager.setExact(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), broadcast);
    }
}

NotificationActivity

public class NotificationActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.notification_activity);
    }
}

报警接收器

public class AlarmReceiver extends BroadcastReceiver{
    @Override
    public void onReceive(Context context, Intent intent) {
        Intent notificationIntent = new Intent(context, NotificationActivity.class);

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

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

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

        Notification notification = builder.setContentTitle("Demo App Notification")
            .setContentText("New Notification From Demo App..")
            .setTicker("New Message Alert!")
            .setSmallIcon(R.mipmap.ic_launcher)
            .setContentIntent(pendingIntent).build();

        NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(0, notification);
    }
}

Answer 1

我认为你可以使用以下内容。

cal.set(日历。DAY_OF_MONTH, 你的日子);

Answer 2

根据用户输入创建这样的 Calendar 实例：

Calendar calendar = Calendar.getInstance();
// Settings calendar for 01/05/2016 12:33:00 AM
calendar.set(Calendar.YEAR, 2016);
calendar.set(Calendar.MONTH, 4); // January has value 0
calendar.set(Calendar.DAY_OF_MONTH, 1);
calendar.set(Calendar.HOUR_OF_DAY, 12);
calendar.set(Calendar.MINUTE, 33);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.AM_PM, Calendar.AM );

并重复使用 setInexactRepeating():

如 android 文档中所述：

Schedule a repeating alarm that has inexact trigger time requirements; for example, an alarm that repeats every hour, but not necessarily at the top of every hour.

例如每天在指定时间（日历）重复闹钟，

// Milliseconds of 24 hours
long interval = 24 * 60 * 60 * 1000;
alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP,
                calendar.getTimeInMillis(), interval , broadcast);

并且setExact()不会重复报警。

Schedule an alarm to be delivered precisely at the stated time.

带有通知和警报管理的完整代码。

public class MyAlarmReceiver extends BroadcastReceiver
{
    // The app's AlarmManager, which provides access to the system alarm services.
    private AlarmManager alarmMgr = null;
    private NotificationManager mNotificationManager;
    NotificationCompat.Builder builder;

    public TankAlarmReceiver()
    {

    }


    @Override
    public void onReceive(Context context, Intent intent)
    {
       mNotificationManager = (NotificationManager)
                context.getSystemService(Context.NOTIFICATION_SERVICE);

        Intent intent = new Intent(context, NotificationActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP);

        // If you use intent extras, remember to call PendingIntent.getActivity() with the flag
        // PendingIntent.FLAG_UPDATE_CURRENT, otherwise the same extras will be reused for every
        // notification.
        PendingIntent contentIntent = PendingIntent.getActivity(context, deviceId.hashCode(), intent,
                PendingIntent.FLAG_UPDATE_CURRENT);

        NotificationCompat.Builder mBuilder =
                new NotificationCompat.Builder(context)
                        .setSmallIcon(getNotificationIcon())
                        .setContentTitle(title)
                        .setStyle(new NotificationCompat.BigTextStyle()
                                .bigText(msg))
                        .setContentText(msg);

        mBuilder.setContentIntent(contentIntent);
        mNotificationManager.notify(NOTIFICATION_ID, mBuilder.build());
    }

    /**
     * Sets a repeating alarm that runs once a day at approximately 8:30 a.m. When the
     * alarm fires, the app broadcasts an Intent to this WakefulBroadcastReceiver.
     *
     * @param settingsModel
     */
    public void setAlarm(Context context, TankSettingsModel settingsModel)
    {
        if(alarmMgr == null)
            alarmMgr = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);

        // Initialize calendar and PendingIntent here

        long alarmIntervalInMin = 1 * 60 * 60 * 1000;
        long triggerAtMillis = calendar.getTimeInMillis();
        alarmMgr.setInexactRepeating(AlarmManager.RTC_WAKEUP,
                triggerAtMillis, alarmIntervalInMin, pendingIntent);

        // Enable {@code SampleBootReceiver} to automatically restart the alarm when the
        // device is rebooted.
        ComponentName receiver = new ComponentName(context, MyBootReceiver.class);
        PackageManager pm = context.getPackageManager();

        pm.setComponentEnabledSetting(receiver,
                PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
                PackageManager.DONT_KILL_APP);
    }

    /**
     * Cancels the alarm.
     *
     * @param deviceId
     */

    public void cancelAlarm(Context context, String deviceId)
    {
        // Code for cancelling the alarm comes here...
    }
}

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