Complete the steps described in the rest of this page to create a simple Javacommand-line application that makes requests to the Google Calendar API.
- Calendarpro For Google 2 3 4 – Google Calendar Application Free
- Calendarpro For Google 2 3 4 – Google Calendar Application Form
- Calendarpro For Google 2 3 4 – Google Calendar Application Template
Prerequisites
To run this quickstart, you need the following prerequisites:
This app does work, and work well in my kindle fire. The Amazon app does not synch properly with my Google online calendar, but this app does. I see people don't like the basic view, but if you are used to the webpage, switch to desktop view (bottom centre of the app), the display is identical to the webpage on a month view. Google Calendar is a core part of the Android productivity package — but if all you're using is what you see on the app's surface, you're missing out on some pretty powerful possibilities. My Google Calendar for Android app is showing 3 'accounts': 2 Google ones, and 1 called 'Default Calendar' (which doesn't seem to be linked to any 'Account' in my Android Settings). Under the 'Default Calendar' account, there are three calendars: - Contacts Birthday.
- Java 1.8 or greater
- Gradle 2.3 or greater.
- A Google account with Google Calendar enabled
Step 1: Turn on the Google Calendar API
Click this button to create a new Cloud Platform project and automaticallyenable the Google Calendar API:
In resulting dialog click DOWNLOAD CLIENT CONFIGURATION and save the filecredentials.json
to your working directory.Step 2: Prepare the project
- In your working directory, run the following commands to create a newproject structure: Direct mail 5 7 11.
- Copy the
credentials.json
file you downloaded in Step 1 into thesrc/main/resources/
directory you just created. - Open the default
build.gradle
file and replace its contents with thefollowing code:
Step 3: Set up the sample
Create a file in the
src/main/java/
folder with the following filename andcode:calendar/quickstart/src/main/java/CalendarQuickstart.java
Step 4: Run the sample
Build and run the quickstart with the command:
The first time you run the sample, it will prompt you to authorize access:
- The sample will attempt to open a new window or tab in your defaultbrowser. If this fails, copy the URL from the console and manually open it inyour browser.If you are not already logged into your Google account, you will beprompted to log in. If you are logged into multiple Google accounts, you willbe asked to select one account to use for the authorization.
- Click the Accept button.
- The sample will proceed automatically, and you may close the window/tab.
Notes
Calendarpro For Google 2 3 4 – Google Calendar Application Free
- Authorization information is stored on the file system, so subsequentexecutions will not prompt for authorization.
- The authorization flow in this example is designed for a command-lineapplication. For information on how to perform authorization in a webapplication, seeUsing OAuth 2.0 for Web Server Applications.
Troubleshooting
Calendarpro For Google 2 3 4 – Google Calendar Application Form
This section describes some common issues that you may encounter whileattempting to run this quickstart and suggests possible solutions.
This app isn't verified.
The OAuth consent screen that is presented to the user may show the warning'This app isn't verified' if it is requesting scopes that provide access tosensitive user data. These applications must eventually go through theverification process toremove that warning and other limitations. During the development phase you cancontinue past this warning by clickingAdvanced > Go to {Project Name} (unsafe).
Further reading
This guide describes how toimplement 'incremental synchronization' of calendar data. Using thismethod, you can keep data for all calendar collections in sync while savingbandwidth.
Calendarpro For Google 2 3 4 – Google Calendar Application Template
Contents
Overview
Incremental synchronization consists of two stages:
- Initial full sync is performed once at the very beginning in order to fullysynchronize the client’s state with the server’s state. The client will obtaina sync token that it needs to persist.
- Incremental sync is performed repeatedly and updates the client with allthe changes that happened ever since the previous sync. Each time, the clientprovides the previous sync token it obtained from the server and stores the new sync token from the response.
'nextSyncToken': 'CPDAlvWDx70CEPDAlvWDx70CGAU=',
Initial full sync
The initial full sync is the original request for all the resources of thecollection you want to synchronize. You can optionally restrict the listrequest using request parameters if you only want to synchronize a specificsubset of resources.
In the response to the list operation, you will find a field called
You don’t need to worry about any new entries appearing while you are paginating — they won’t be missed. The information needed for the server to generate a correct sync token is encoded in the page token.nextSyncToken
representing a sync token. You'll need to store the value of nextSyncToken
. If the result set is too large and the response getspaginated, then the nextSyncToken
field is present only on the very last page.Incremental sync
Incremental sync allows you to retrieve all the resources that have beenmodified since the last sync request. To do this, you need to perform a listrequest with your most recent sync token specified in the
syncToken
field.Keep in mind that the result will always contain deleted entries, so that theclients get the chance to remove them from storage.In cases where a large number of resources have changed since the lastincremental sync request, you may find a
pageToken
instead of a syncToken
in the list result. In these cases you'll need to perform the exact samelist query as was used for retrieval of the first page in the incremental sync(with the exact same syncToken
), append the pageToken
to it andpaginate through all the following requests until you find another syncToken
on the last page. Make sure to store this syncToken
for the next syncrequest in the future.Here are example queries for a case requiring incremental paginated sync:
Original query
Retrieving next page
The set of query parameters that can be used on incremental sync list requestsis restricted. For the individual restrictions on each collection, see thecorresponding documentation for list requests. The response code for listqueries containing disallowed restrictions is `400 `.Full sync required by server
Sometimes sync tokens are invalidated by the server, for various reasonsincluding token expiration or changes in related ACLs.In such cases, the server will respond to an incremental request with aresponse code
410
. This should trigger a full wipe of the client’s storeand a new full sync.Sample code
The snippet of sample code below demonstrates how to use sync tokens with theJava client library. The first timethe run method is called it will perform a full sync and store the sync token.On each subsequent execution it will load the saved sync token and perform anincremental sync.
Legacy synchronization
For event collections, it is still possible to do synchronization in thelegacy manner by preserving the value of the updated field from an events listrequest and then using the
modifiedSince
Pinbox 1 1. field to retrieve updated events.This approach is no longer recommended as it is more error-prone with respectto missed updates (for example if does not enforce query restrictions).Furthermore, it is available only for events.