Android studio календарь с заметками пример

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Android Calendar API

Зачем!?

Я столкнулся с такой задачей, когда писал приложение для составления своего университетского расписания. Удобно иметь свое расписание отдельно, да еще и стандартный календарь не поддерживает повторение событий через одну неделю, что необходимо для двухнедельного (чет./нечет.) расписания.
Идеей фикс была функция приложения, которая позволит “заполнить” введенным расписанием Android календарь. Плюсы очевидны: синхронизация с Google Calendar от google (простите за тавтологию), встроенные виджеты календаря (очень уж хорош этот виджет от HTC Sense) и гора виджетов от сторонних производителей, которые хоть покажут следующее событие, хоть загруженность недели, и т.д. Тут и понадобилась работа с календарем Android.

Использовать недокументированное API — это ПЛОХО! Пнятненько?

Неужели чтобы решить эту очевидную задачу необходимо использовать недокументированное API? Ответ – нет. Самый правильный метод использовать API Google Calendar, что я вам и советую сделать в своих разработках.

Но “правильный” метод налагает ряд ограничений:
• Нельзя использовать в отсутствии соединения с Интернет;
• Необходима синхронизация после заполнения календаря;
• Данные (а их не мало при заполнении целого года) идут до сервера а потом при синхронизации идут обратно, что, очевидно, увеличивает трафик в два раза.

По моему мнению, намного удобней использовать офлайн версию календаря, которую при любом удобном случае можно синхронизировать с гуглокалендарем. К сожалению google не позаботился о разработчиках под Android и не опубликовал официального API, но к нашей радости исходные коды Android открыты и умные люди уже давно нашли волшебные URI контент провайдеров.

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Android studio календарь с заметками пример

Caldroid is a fragment that display calendar with dates in a month. Caldroid can be used as embedded fragment, or as dialog fragment. User can also swipe left/right to navigate to different months.

It’s very easy to customize look and feel of Caldroid using your own theme, thanks to @crocodile2u contribution. There are two default themes in Caldroid (Light and Dark). You can provide your own theme based on these default themes as well.

Caldroid is fully localized. You can customize start day of the week for different countries. By default calendar start on Sunday.

Caldroid can be used with Android 2.2 and above. It is extracted from official Roomorama application

If you found bugs specific to Caldroid, please open a new issue on Github. However for general Android questions (about layout, drawable, etc), you probably can find more information on StackOverflow.

For Android Studio user: add compile ‘com.roomorama:caldroid:3.0.1’ to your gradle build file.

For Maven user:

For Eclipse/ADT user: please see tag eclipse_project, download the source codes, check out the CaldroidSample to see how the library works. However you are strongly recommended to use Maven or gradle, because this tag is no longer supported.

To use in your project, reference the child library project as a library. If you see JAR mismatched error, replace your android-support-v4.jar to the jar inside Caldroid. Make sure you compile the project against Android 4.2 and above to allow nested fragment. See more at http://developer.android.com/about/versions/android-4.2.html#NestedFragments

##Flexible setup: can be embedded or shown as dialog If you support Android 2.2 and above, you can embed caldroid fragment in your activity with below code:

If your app only target minSdkVersion 16 and above, you can use Caldroid too. First, you need to change your Activity class to FragmentActivity , and add support library to your project. You don’t have to change how you use android.app.Fragment .

You can also embed caldroid fragment as a child in your fragment.

Caldroid accepts numerous arguments during start up:

To customize the startDayOfWeek, just use

If you want to know when user clicks on disabled dates:

By default, Caldroid use square TextView to display date. However when the screen has limited space, user can switch to normal TextView instead:

Caldroid uses SQUARE_TEXT_VIEW_CELL parameter internally as well. When the phone is in portrait mode, it will default SQUARE_TEXT_VIEW_CELL to true , and on landscape, SQUARE_TEXT_VIEW_CELL is set to false . If your app provides different value, Caldroid will use your value instead of the default one.

To show the caldroid fragment as a dialog, you might want to set the dialog title. There is a convenient method for that:

You can define your own theme to change the look and feel of Caldroid without having to subclass it. You should inherit from base theme CaldroidDefault . Here’s how to create a dark theme:

After creating your own theme, supply it to your Caldroid fragment:

Custom backgrounds and text colors for different dates

It is very easy to supply different backgrounds and text colors for different dates:

To use these methods, you can define your colors in color.xml and background in drawable folder:

You need to call refreshView() after above methods to update calendar appearance.

You can also clear the background and text color:

Display user events on Caldroid

Caldroid is simply an UI library and it does not connect to user calendar database or fetch any user’s events. If your app wants to display these events on Caldroid:

Your app needs to fetch events (from server or from user calendar database, depend on your app)

Design a drawable for the date with event. See more here for all types of drawable you can create: http://developer.android.com/guide/topics/resources/drawable-resource.html

Use above setBackgroundDrawableForDate method to set the event drawable to correct date

Call refreshView() to update calendar appearance

If you need to customize more for the cell, you can supply your own cell design.

Set min / max date

Client can use below methods:

To refresh the calendar, just call refreshView()

Set disabled dates

Client can either provide ArrayList or ArrayList to Caldroid.

To clear the disabled dates:

##Select dates within a range To select dates within a range:

To clear the selected dates:

##Show / Hide the navigation arrows to move to previous or next month To show/hide the navigation arrows:

To enable / disable swipe:

Client can programmatically move the calendar (with animation) to a specified date:

##Allow user to select a date and inform listener

Caldroid inform clients via CaldroidListener.

User can also customize the navigation arrows and month title textView: font, size, onClickListener, onLongClickListener, etc. Client can supply different adapter to the weekdayGridView. Make sure you only access these methods after Caldroid has been successfully attached to view, otherwise you will see NullPointerException.

##Handle screen rotation

To handle rotation properly, Caldroid provides method to get current states of the fragment:

Using above method, you can save current state of Caldroid on onSaveInstanceState(Bundle outState) method.

On your activity code:

Then you can restore the state in onCreate(Bundle savedInstanceState) of your activity. The algorithm is like below:

If you use Caldroid as dialog, you can use restoreDialogStatesFromKey

Refer to the CaldroidSampleActivity for more detail.

##Allow customized cell for the dates gridView

Caldroid provides flexible API to supply your own cell view. What you have to do is:

Create your own cell view layout in your project

Subclass CaldroidGridAdapter and override getView(int position, View convertView, ViewGroup parent) . See CaldroidSampleCustomAdapter.java for more detail. Here you can customize everything: layout, text color, background for different states (normal, disable, selected)

Subclass CaldroidFragment to use your custom adapter instead of the default CaldroidGridAdapter. This is simplest step:

1. Use your new customized fragment in your project instead of the default CaldroidFragment.

To see how it works, you can uncomment this line in CaldroidSampleActivity

The extraData is a HashMap , is designed to let client injects custom data to CaldroidGridAdapter, so that data can be used to customize the date grid view. Usage is simple:

In your client code:

In the CaldroidSampleCustomAdapter:

Caldroid fragment includes 4 main parts:

Month title view: show the month and year (e.g MARCH, 2013)

Navigation arrows: to navigate to next month or previous month

Weekday gridview: contains only 1 row and 7 columns. To display «SUN, MON, TUE, WED, THU, FRI, SAT»

An infinite view pager that allow user to swipe left/right to change month. This library is taken from https://github.com/antonyt/InfiniteViewPager

This infinite view pager recycles 4 fragment, each fragment contains a gridview with 7 columns to display the dates in month. Whenever user swipes different screen, the date grid views are updated.

Caldroid code is simple and clean partly because of powerful date4j library!

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