Java tutorial
//package com.java2s; /* * Copyright (C) 2016 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.util.TimeZone; public class Main { /** * Since all dates from the database are in UTC, we must convert the given date * (in UTC timezone) to the date in the local timezone. Ths function performs that conversion * using the TimeZone offset. * * @param utcDate The UTC datetime to convert to a local datetime, in milliseconds. * @return The local date (the UTC datetime - the TimeZone offset) in milliseconds. */ public static long getLocalDateFromUTC(long utcDate) { TimeZone tz = TimeZone.getDefault(); long gmtOffset = tz.getOffset(utcDate); return utcDate - gmtOffset; } }