Java tutorial
//package com.java2s; /******************************************************************* * Copyright (c) 2010 Rohit Kumbhar * * Permission is hereby granted, free of charge, to any person * obtaining a copy of this software and associated documentation * files (the "Software"), to deal in the Software without * restriction, including without limitation the rights to use, * copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following * conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. *******************************************************************/ import android.app.Activity; import android.database.Cursor; import android.net.Uri; public class Main { public static boolean haveCalendars(Activity ctx) { boolean exists = false; String[] projection = new String[] { "_id", "name" }; Uri calendars = Uri.parse("content://calendar/calendars"); // Calendar uri changes for 2.2 Uri calendars_2_2 = Uri.parse("content://com.android.calendar/calendars"); Cursor managedCursor = ctx.managedQuery(calendars, projection, null, null, null); if (managedCursor == null || managedCursor.getCount() == 0) managedCursor = ctx.managedQuery(calendars_2_2, projection, null, null, null); if (managedCursor != null && managedCursor.moveToFirst()) { String calName; String calId; int nameColumn = managedCursor.getColumnIndex("name"); int idColumn = managedCursor.getColumnIndex("_id"); do { calName = managedCursor.getString(nameColumn); calId = managedCursor.getString(idColumn); exists = true; } while (managedCursor.moveToNext()); managedCursor.close(); } return exists; } }