Here you can find the source of decrementOneDay(Time t)
private static final void decrementOneDay(Time t)
//package com.java2s; /*//from ww w.jav a 2 s . c om * Copyright (C) 2011 The original author or authors. * * 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 android.text.format.Time; public class Main { private static final void decrementOneDay(Time t) { if (t.monthDay > 1) { t.monthDay--; return; } if (t.month > 0) { t.month--; } else { t.year--; t.month = 11; } // Set day to end of month t.monthDay = 1; // temporary, have a valid date t.monthDay = t.getActualMaximum(Time.MONTH_DAY); } }