2019July15_日历事件添加、查询、删除
一 需求
- 动态添加当前应用事件
- 查询当前应用的事件，区别其他应用
- 删除当前应用指定事件
二 效果图
三 原理分析
- 要调用系统日历API，并申请权限，注意申请动态权限
- 为当前应用在日历中创建一个账户id，以id区分是不是当前应用的日历事件
- 以日历事件的标题来区分当前应用的不同事件，调用日历API实现增、查、删
四 主要代码
工具类调用日历功能
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_ACCOUNT_NAME = "1730882045";
private static String CALENDARS_ACCOUNT_TYPE = "com.android.bpj";
/**
* 检查是否已经添加了日历账户，如果没有添加先添加一个日历账户再查询
* 获取账户成功返回账户id，否则返回-1
*/
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;
}
}
}
/**
* 检查是否存在现有账户，存在则返回账户id，否则返回-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) { //存在现有账户，取第一个账户的id返回
for (userCursor.moveToFirst(); !userCursor.isAfterLast(); userCursor.moveToNext()) {
String accountName = userCursor.getString(userCursor.getColumnIndex(CalendarContract.Calendars.ACCOUNT_NAME));
if (CALENDARS_ACCOUNT_NAME.equals(accountName)) {
return userCursor.getInt(userCursor.getColumnIndex(CalendarContract.Calendars._ID));
}
}
return -1;
} else {
return -1;
}
} finally {
if (userCursor != null) {
userCursor.close();
}
}
}
/**
* 添加日历账户，账户创建成功则返回账户id，否则返回-1
*/
private static long addCalendarAccount(Context context) {
TimeZone timeZone = TimeZone.getDefault();
ContentValues value = new ContentValues();
value.put(CalendarContract.Calendars.ACCOUNT_NAME, CALENDARS_ACCOUNT_NAME);
value.put(CalendarContract.Calendars.ACCOUNT_TYPE, CALENDARS_ACCOUNT_TYPE);
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
*/
public static void addCalendarEvent(Context context, String title, String description, long reminderTime, int previousDate) {
if (context == null) {
return;
}
int calId = checkAndAddCalendarAccount(context); //获取日历账户的id
if (calId < 0) { //获取账户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(CalendarContract.Events.TITLE, title );
event.put(CalendarContract.Events.DESCRIPTION, description);
event.put(CalendarContract.Events.CALENDAR_ID, calId); //插入账户的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/Beijing");//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);// 提前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;
}
}
public static List> query(Context context) {
Cursor eventCursor = context.getContentResolver().query(Uri.parse(CALENDER_EVENT_URL), null, null, null, null);
List> list = new ArrayList<>();
try {
if (eventCursor == null) { //查询返回空值
return list;
}
int accountId = checkCalendarAccount(context);
if (eventCursor.getCount() > 0 && accountId > 0) {
//遍历所有事件，找到title跟需要查询的title一样的项
for (eventCursor.moveToFirst(); !eventCursor.isAfterLast(); eventCursor.moveToNext()) {
int calId = eventCursor.getInt(eventCursor.getColumnIndex(CalendarContract.Events.CALENDAR_ID));
if (accountId == calId) {
Map map = new HashMap<>();
map.put(CalendarContract.Events.TITLE, eventCursor.getString(eventCursor.getColumnIndex(CalendarContract.Events.TITLE)));
map.put(CalendarContract.Events.DESCRIPTION, eventCursor.getString(eventCursor.getColumnIndex(CalendarContract.Events.DESCRIPTION)));
list.add(map);
}
}
}
} finally {
if (eventCursor != null) {
eventCursor.close();
}
}
return list;
}
/**
* 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) {
//遍历所有事件，找到title跟需要查询的title一样的项
for (eventCursor.moveToFirst(); !eventCursor.isAfterLast(); eventCursor.moveToNext()) {
String eventTitle = eventCursor.getString(eventCursor.getColumnIndex(CalendarContract.Events.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();
}
}
}
}
使用
private ListView lv;
private String[] permissions = new String[]{Manifest.permission.READ_CALENDAR, Manifest.permission.WRITE_CALENDAR, Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE};
public int x = 0, y = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.calendar_activity);
checkPermission();
}
private boolean checkPermission() {
String[] perms = AppUtils.getDeniedPermissions(this, permissions);
if (perms == null || perms.length == 0) {
return true;
} else {
AppUtils.requestPermissions(this, permissions, PermissionActivity.CODE_PERMISSION_REQUEST);
return false;
}
}
public void add(View v) {
Calendar calendar = Calendar.getInstance();
CalendarReminderUtils.addCalendarEvent(this, "标题" + x, "到期提醒" + x, calendar.getTimeInMillis(), 0);
x++;
}
public void query(View v) {
x = 0;
y = 0;
lv = (ListView) findViewById(R.id.lv);
List> list = CalendarReminderUtils.query(this);
lv.setAdapter(new ArrayAdapter>(this, android.R.layout.simple_dropdown_item_1line, list));
}
public void delete(View v) {
CalendarReminderUtils.deleteCalendarEvent(this, "标题" + y);
y++;
}
注意添加权限（动态权限申请checkPermission）：
4 Demo
CalendarActivity