Android向系统日历添加日程提醒事件

在项目开发过程当中，有时会有预定提醒、定时提醒等需求，这时咱们可使用系统日从来辅助提醒。经过向系统日历中写入事件、设置提醒方式（闹钟），实现到达某个特定的时间自动提醒的功能。这样作的好处是因为提醒功能是交付给系统日从来作，不会出现应用被杀状况，可以作到准时提醒。
通常来讲实现向系统日历中读写事件通常有如下几个步骤：
(1)须要有读写日历权限;
(2)若是没有日历帐户须要先建立帐户;
(3)实现日历事件增删改查、提醒功能;

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1.权限申请

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

2.日历相关uri

private static String CALENDER_URL = "content://com.android.calendar/calendars"; private static String CALENDER_EVENT_URL = "content://com.android.calendar/events"; private static String CALENDER_REMINDER_URL = "content://com.android.calendar/reminders";

3.具体实现

import android.content.ContentUris; import android.content.ContentValues; import android.content.Context; import android.database.Cursor; import android.graphics.Color; import android.net.Uri; import android.os.Build; import android.provider.CalendarContract; import android.support.annotation.RequiresApi; import android.text.TextUtils; import java.util.Calendar; import java.util.TimeZone; public class CalendarReminderUtils { private static String CALENDER_URL = "content://com.android.calendar/calendars"; private static String CALENDER_EVENT_URL = "content://com.android.calendar/events"; private static String CALENDER_REMINDER_URL = "content://com.android.calendar/reminders"; private static String CALENDARS_NAME = "boohee"; private static String CALENDARS_ACCOUNT_NAME = "BOOHEE@boohee.com"; private static String CALENDARS_ACCOUNT_TYPE = "com.android.boohee"; private static String CALENDARS_DISPLAY_NAME = "BOOHEE帐户"; /** * 检查是否已经添加了日历帐户，若是没有添加先添加一个日历帐户再查询 * 获取帐户成功返回帐户id，不然返回-1 */ @RequiresApi(api = Build.VERSION_CODES.N) private static int checkAndAddCalendarAccount(Context context) { int oldId = checkCalendarAccount(context); if( oldId >= 0 ){ return oldId; }else{ long addId = addCalendarAccount(context); if (addId >= 0) { return checkCalendarAccount(context); } else { return -1; } } } /** * 检查是否存在现有帐户，存在则返回帐户id，不然返回-1 */
    private static int checkCalendarAccount(Context context) { Cursor userCursor = context.getContentResolver().query(Uri.parse(CALENDER_URL), null, null, null, null); try { if (userCursor == null) { //查询返回空值
                return -1; } int count = userCursor.getCount(); if (count > 0) { //存在现有帐户，取第一个帐户的id返回
 userCursor.moveToFirst(); return userCursor.getInt(userCursor.getColumnIndex(CalendarContract.Calendars._ID)); } else { return -1; } } finally { if (userCursor != null) { userCursor.close(); } } } /** * 添加日历帐户，帐户建立成功则返回帐户id，不然返回-1 */

    private static long addCalendarAccount(Context context) { TimeZone timeZone = TimeZone.getDefault(); ContentValues value = new ContentValues(); value.put(CalendarContract.Calendars.NAME, CALENDARS_NAME); value.put(CalendarContract.Calendars.ACCOUNT_NAME, CALENDARS_ACCOUNT_NAME); value.put(CalendarContract.Calendars.ACCOUNT_TYPE, CALENDARS_ACCOUNT_TYPE); value.put(CalendarContract.Calendars.CALENDAR_DISPLAY_NAME, CALENDARS_DISPLAY_NAME); value.put(CalendarContract.Calendars.VISIBLE, 1); value.put(CalendarContract.Calendars.CALENDAR_COLOR, Color.BLUE); value.put(CalendarContract.Calendars.CALENDAR_ACCESS_LEVEL, CalendarContract.Calendars.CAL_ACCESS_OWNER); value.put(CalendarContract.Calendars.SYNC_EVENTS, 1); value.put(CalendarContract.Calendars.CALENDAR_TIME_ZONE, timeZone.getID()); value.put(CalendarContract.Calendars.OWNER_ACCOUNT, CALENDARS_ACCOUNT_NAME); value.put(CalendarContract.Calendars.CAN_ORGANIZER_RESPOND, 0); Uri calendarUri = Uri.parse(CALENDER_URL); calendarUri = calendarUri.buildUpon() .appendQueryParameter(CalendarContract.CALLER_IS_SYNCADAPTER, "true") .appendQueryParameter(CalendarContract.Calendars.ACCOUNT_NAME, CALENDARS_ACCOUNT_NAME) .appendQueryParameter(CalendarContract.Calendars.ACCOUNT_TYPE, CALENDARS_ACCOUNT_TYPE) .build(); Uri result = context.getContentResolver().insert(calendarUri, value); long id = result == null ? -1 : ContentUris.parseId(result); return id; } /** * 添加日历事件 */ @RequiresApi(api = Build.VERSION_CODES.N) public static void addCalendarEvent(Context context, String title, String description, long reminderTime, int previousDate) { if (context == null) { return; } int calId = checkAndAddCalendarAccount(context); //获取日历帐户的id
        if (calId < 0) { //获取帐户id失败直接返回，添加日历事件失败
            return; } //添加日历事件
        Calendar mCalendar = Calendar.getInstance(); mCalendar.setTimeInMillis(reminderTime);//设置开始时间
        long start = mCalendar.getTime().getTime(); mCalendar.setTimeInMillis(start + 10 * 60 * 1000);//设置终止时间，开始时间加10分钟
        long end = mCalendar.getTime().getTime(); ContentValues event = new ContentValues(); event.put("title", title); event.put("description", description); event.put("calendar_id", calId); //插入帐户的id
 event.put(CalendarContract.Events.DTSTART, start); event.put(CalendarContract.Events.DTEND, end); event.put(CalendarContract.Events.HAS_ALARM, 1);//设置有闹钟提醒
        event.put(CalendarContract.Events.EVENT_TIMEZONE, "Asia/Shanghai");//这个是时区，必须有
        Uri newEvent = context.getContentResolver().insert(Uri.parse(CALENDER_EVENT_URL), event); //添加事件
        if (newEvent == null) { //添加日历事件失败直接返回
            return; } //事件提醒的设定
        ContentValues values = new ContentValues(); values.put(CalendarContract.Reminders.EVENT_ID, ContentUris.parseId(newEvent)); values.put(CalendarContract.Reminders.MINUTES, previousDate * 24 * 60);// 提早previousDate天有提醒
 values.put(CalendarContract.Reminders.METHOD, CalendarContract.Reminders.METHOD_ALERT); Uri uri = context.getContentResolver().insert(Uri.parse(CALENDER_REMINDER_URL), values); if(uri == null) { //添加事件提醒失败直接返回
            return; } } /** * 删除日历事件 */
    public static void deleteCalendarEvent(Context context,String title) { if (context == null) { return; } Cursor eventCursor = context.getContentResolver().query(Uri.parse(CALENDER_EVENT_URL), null, null, null, null); try { if (eventCursor == null) { //查询返回空值
                return; } if (eventCursor.getCount() > 0) { //遍历全部事件，找到title跟须要查询的title同样的项
                for (eventCursor.moveToFirst(); !eventCursor.isAfterLast(); eventCursor.moveToNext()) { String eventTitle = eventCursor.getString(eventCursor.getColumnIndex("title")); if (!TextUtils.isEmpty(title) && title.equals(eventTitle)) { int id = eventCursor.getInt(eventCursor.getColumnIndex(CalendarContract.Calendars._ID));//取得id
                        Uri deleteUri = ContentUris.withAppendedId(Uri.parse(CALENDER_EVENT_URL), id); int rows = context.getContentResolver().delete(deleteUri, null, null); if (rows == -1) { //事件删除失败
                            return; } } } } } finally { if (eventCursor != null) { eventCursor.close(); } } }

4.测试添加事件

CalendarReminderUtils.addCalendarEvent(this,"学校读书","吃了饭再去",System.currentTimeMillis()+3600*24*1000*2+10000,2);

5，效果

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注意：6.0 以上须要申请权限才可使用哦