如何通过编程获取Google日历提醒列表？Android应用读取问题咨询

Hey there! I’ve dealt with this exact problem before, so I know how confusing it is when your app pulls regular calendar events no problem, but those knot-finger Google Calendar Reminders stay out of reach. Let’s walk through the proper ways to access them:

Google Calendar Reminders (the ones with the knotted finger icon) aren’t stored alongside regular calendar events. They’re now tied to the Google Tasks API—that’s why your existing code for fetching calendar events isn’t picking them up.

This is the only reliable way to access modern Google Calendar Reminders. Here’s what you need to do:

• Enable the Tasks API in your Google Cloud Console project (just search for "Tasks API" in the API library and toggle it on)
• Add these dependencies to your app’s build.gradle (Module level):

  implementation 'com.google.android.gms:play-services-auth:20.7.0'
  implementation 'com.google.apis:google-api-services-tasks:v1-rev20230516-2.0.0'
  

• Authenticate the user with Google Sign-In, requesting the TasksScopes.TASKS scope. This lets your app access their task lists (including the default "Reminders" list linked to Calendar)
• Once authenticated, fetch the reminders with the Tasks client:

  // Set up the Tasks service using your authenticated credential
  Tasks tasksService = new Tasks.Builder(AndroidHttp.newCompatibleTransport(),
          GsonFactory.getDefaultInstance(), yourGoogleCredential)
          .setApplicationName("Your App Name")
          .build();
  
  // Get all task lists
  TaskLists taskLists = tasksService.tasklists().list().execute();
  for (TaskList list : taskLists.getItems()) {
      // The default Calendar Reminders list is named "Reminders"
      if ("Reminders".equals(list.getTitle())) {
          // Fetch all tasks (reminders) from this list
          Tasks tasks = tasksService.tasks().list(list.getId()).execute();
          for (com.google.api.services.tasks.model.Task reminder : tasks.getItems()) {
              // Extract reminder details
              String title = reminder.getTitle();
              String dueDateTime = reminder.getDue(); // Format is RFC 3339
              Boolean isCompleted = reminder.getCompleted() != null;
  
              // Process the reminder data as needed
          }
      }
  }
  

• Note: Reminders with a scheduled date/time will have a due field; undated ones won’t. Completed reminders will have a completed timestamp.

Older versions of Google Calendar used to store some reminders in the system’s Calendar Provider, but this is deprecated now. It only works for reminders that haven’t been migrated to the Tasks system, so it’s not reliable for most users. But if you need to support older devices:

• You’ll need the READ_CALENDAR permission (which you probably already have for regular events)
• Query the CalendarContract.Reminders.CONTENT_URI with a ContentResolver:

  Cursor reminderCursor = getContentResolver().query(
          CalendarContract.Reminders.CONTENT_URI,
          new String[]{
                  CalendarContract.Reminders.TITLE,
                  CalendarContract.Reminders.DUE_DATE,
                  CalendarContract.Reminders.STATUS
          },
          null,
          null,
          null
  );
  
  if (reminderCursor != null) {
      while (reminderCursor.moveToNext()) {
          String title = reminderCursor.getString(reminderCursor.getColumnIndex(CalendarContract.Reminders.TITLE));
          long dueTimestamp = reminderCursor.getLong(reminderCursor.getColumnIndex(CalendarContract.Reminders.DUE_DATE));
          int status = reminderCursor.getInt(reminderCursor.getColumnIndex(CalendarContract.Reminders.STATUS));
  
          // Process legacy reminder data
      }
      reminderCursor.close();
  }
  

• For the Tasks API: Add the INTERNET permission to your manifest, and request the TasksScopes.TASKS scope during Google Sign-In
• For the legacy Calendar Provider: Ensure you have the READ_CALENDAR permission declared in your manifest and granted by the user

Pro tip: Always handle exceptions gracefully—like network errors, authentication failures, or cases where the user doesn’t have a "Reminders" task list (though it’s created by default when they use Calendar reminders).

内容的提问来源于stack exchange，提问作者Kaba Droid42