如何在Android中设置提醒？

Question

我正在尝试为 Android 构建一个日历应用程序。我被击中了中间。我已经设法从用户​​那里检索到时间和任务等信息。

我不知道如何将它添加到 android 事件中。有没有类似setEvent 或类似的东西？

Answer 1

不，如果你想透明地把它添加到用户的日历中，它比仅仅调用一个方法更复杂。

你有几个选择；

1. 调用意图在日历上添加事件
   这将弹出日历应用程序并让用户添加事件。您可以传递一些参数来预填充字段：

   Calendar cal = Calendar.getInstance();              
   Intent intent = new Intent(Intent.ACTION_EDIT);
   intent.setType("vnd.android.cursor.item/event");
   intent.putExtra("beginTime", cal.getTimeInMillis());
   intent.putExtra("allDay", false);
   intent.putExtra("rrule", "FREQ=DAILY");
   intent.putExtra("endTime", cal.getTimeInMillis()+60*60*1000);
   intent.putExtra("title", "A Test Event from android app");
   startActivity(intent);
   

   或者更复杂的一个：

2. 使用此方法获取对日历的引用
   （强烈建议不要使用此方法，因为它可能会在较新的 Android 版本上中断）：

   private String getCalendarUriBase(Activity act) {
   
       String calendarUriBase = null;
       Uri calendars = Uri.parse("content://calendar/calendars");
       Cursor managedCursor = null;
       try {
           managedCursor = act.managedQuery(calendars, null, null, null, null);
       } catch (Exception e) {
       }
       if (managedCursor != null) {
           calendarUriBase = "content://calendar/";
       } else {
           calendars = Uri.parse("content://com.android.calendar/calendars");
           try {
               managedCursor = act.managedQuery(calendars, null, null, null, null);
           } catch (Exception e) {
           }
           if (managedCursor != null) {
               calendarUriBase = "content://com.android.calendar/";
           }
       }
       return calendarUriBase;
   }
   

   并以这种方式添加事件和提醒：

   // get calendar
   Calendar cal = Calendar.getInstance();     
   Uri EVENTS_URI = Uri.parse(getCalendarUriBase(this) + "events");
   ContentResolver cr = getContentResolver();
   
   // event insert
   ContentValues values = new ContentValues();
   values.put("calendar_id", 1);
   values.put("title", "Reminder Title");
   values.put("allDay", 0);
   values.put("dtstart", cal.getTimeInMillis() + 11*60*1000); // event starts at 11 minutes from now
   values.put("dtend", cal.getTimeInMillis()+60*60*1000); // ends 60 minutes from now
   values.put("description", "Reminder description");
   values.put("visibility", 0);
   values.put("hasAlarm", 1);
   Uri event = cr.insert(EVENTS_URI, values);
   
   // reminder insert
   Uri REMINDERS_URI = Uri.parse(getCalendarUriBase(this) + "reminders");
   values = new ContentValues();
   values.put( "event_id", Long.parseLong(event.getLastPathSegment()));
   values.put( "method", 1 );
   values.put( "minutes", 10 );
   cr.insert( REMINDERS_URI, values );
   

   您还需要将这些权限添加到此方法的清单中：

   <uses-permission android:name="android.permission.READ_CALENDAR" />
   <uses-permission android:name="android.permission.WRITE_CALENDAR" />
   

更新：ICS 问题

以上示例使用未记录的日历 API，新的公共日历 API 已针对 ICS 发布，因此，针对新的 android 版本，您应该使用CalendarContract。

更多信息请访问this blog post。

Answer 2

您可以在带有通知机制的合作社中使用 AlarmManager 像这样的：

Intent intent = new Intent(ctx, ReminderBroadcastReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(ctx, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager am = (AlarmManager) ctx.getSystemService(Activity.ALARM_SERVICE);
// time of of next reminder. Unix time.
long timeMs =...
if (Build.VERSION.SDK_INT < 19) {
    am.set(AlarmManager.RTC_WAKEUP, timeMs, pendingIntent);
} else {
    am.setExact(AlarmManager.RTC_WAKEUP, timeMs, pendingIntent);
}

它开始报警。

public class ReminderBroadcastReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
                .setSmallIcon(...)
                .setContentTitle(..)
                .setContentText(..);
        Intent intentToFire = new Intent(context, Activity.class);
        PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intentToFire, PendingIntent.FLAG_UPDATE_CURRENT);
        builder.setContentIntent(pendingIntent);
        NotificationManagerCompat.from(this);.notify((int) System.currentTimeMillis(), builder.build());
    }
}

Answer 3

Android 完整源代码，用于添加具有开始和结束时间格式的事件和提醒。

/** Adds Events and Reminders in Calendar. */
private void addReminderInCalendar() {
    Calendar cal = Calendar.getInstance();
    Uri EVENTS_URI = Uri.parse(getCalendarUriBase(true) + "events");
    ContentResolver cr = getContentResolver();
    TimeZone timeZone = TimeZone.getDefault();

    /** Inserting an event in calendar. */
    ContentValues values = new ContentValues();
    values.put(CalendarContract.Events.CALENDAR_ID, 1);
    values.put(CalendarContract.Events.TITLE, "Sanjeev Reminder 01");
    values.put(CalendarContract.Events.DESCRIPTION, "A test Reminder.");
    values.put(CalendarContract.Events.ALL_DAY, 0);
    // event starts at 11 minutes from now
    values.put(CalendarContract.Events.DTSTART, cal.getTimeInMillis() + 11 * 60 * 1000);
    // ends 60 minutes from now
    values.put(CalendarContract.Events.DTEND, cal.getTimeInMillis() + 60 * 60 * 1000);
    values.put(CalendarContract.Events.EVENT_TIMEZONE, timeZone.getID());
    values.put(CalendarContract.Events.HAS_ALARM, 1);
    Uri event = cr.insert(EVENTS_URI, values);

    // Display event id
    Toast.makeText(getApplicationContext(), "Event added :: ID :: " + event.getLastPathSegment(), Toast.LENGTH_SHORT).show();

    /** Adding reminder for event added. */
    Uri REMINDERS_URI = Uri.parse(getCalendarUriBase(true) + "reminders");
    values = new ContentValues();
    values.put(CalendarContract.Reminders.EVENT_ID, Long.parseLong(event.getLastPathSegment()));
    values.put(CalendarContract.Reminders.METHOD, Reminders.METHOD_ALERT);
    values.put(CalendarContract.Reminders.MINUTES, 10);
    cr.insert(REMINDERS_URI, values);
}

/** Returns Calendar Base URI, supports both new and old OS. */
private String getCalendarUriBase(boolean eventUri) {
    Uri calendarURI = null;
    try {
        if (android.os.Build.VERSION.SDK_INT <= 7) {
            calendarURI = (eventUri) ? Uri.parse("content://calendar/") : Uri.parse("content://calendar/calendars");
        } else {
            calendarURI = (eventUri) ? Uri.parse("content://com.android.calendar/") : Uri
                    .parse("content://com.android.calendar/calendars");
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    return calendarURI.toString();
}

为您的清单文件添加权限。

<uses-permission android:name="android.permission.READ_CALENDAR" />
<uses-permission android:name="android.permission.WRITE_CALENDAR" />