TimeUtils.java

package com.android.yzd.memo.utils;

import android.content.Context;
import com.android.yzd.memo.R;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * Created by lgp on 2015/5/25.
 */
public class TimeUtils {
    public static final long HOUR_Millis = 60 * 60 * 1000;
    public static final long HALF_HOUR_Millis = HOUR_Millis / 2;
    public static final long DAY_Millis = 24 * HOUR_Millis;
    public static final long MONTH_Millis = 30 * DAY_Millis;
    public static final long YEAR_Millis = 365 * DAY_Millis;
    public static final SimpleDateFormat DEFAULT_DATE_FORMAT = new SimpleDateFormat("yyyy.MM.dd    HH : mm");
    public static final SimpleDateFormat DATE_FORMAT_DATE_1    = new SimpleDateFormat(" HH : mm ");

    private TimeUtils() {
        throw new AssertionError();
    }

    /**
     * long time to string
     *
     * @param timeInMillis
     * @param dateFormat
     * @return
     */
    public static String getTime(long timeInMillis, SimpleDateFormat dateFormat) {
        return dateFormat.format(new Date(timeInMillis));
    }

    /**
     * long time to string, format is {@link #DEFAULT_DATE_FORMAT}
     *
     * @param timeInMillis
     * @return
     */
    public static String getTime(long timeInMillis) {
        return getTime(timeInMillis, DEFAULT_DATE_FORMAT);
    }

    @SuppressWarnings("Deprecated")
    public static String getConciseTime(long timeInMillis, long nowInMillis, Context context) {
        if (context == null)
            return "";
        long diff = nowInMillis - timeInMillis;
        if (diff >= YEAR_Millis){
            int year = (int)(diff / YEAR_Millis);
            return context.getString(R.string.before_year, year);
        }
        if (diff >= MONTH_Millis){
            int month = (int)(diff / MONTH_Millis);
            return context.getString(R.string.before_month, month);
        }

        if (diff >= DAY_Millis){
            int day = (int)(diff / DAY_Millis);
            return context.getString(R.string.before_day, day);
        }

        if (diff >= HOUR_Millis){
            int hour = (int)(diff / HOUR_Millis);
            return context.getString(R.string.before_hour, hour);
        }

        if (diff >= HALF_HOUR_Millis){
            return context.getString(R.string.before_half_hour);
        }
        return context.getString(R.string.just_now);
    }


    public static String getConciseTime(long timeInMillis, Context context) {
        return getConciseTime(timeInMillis, getCurrentTimeInLong(), context);
    }
    /**
     * get current time in milliseconds
     *
     * @return
     */
    public static long getCurrentTimeInLong() {
        return System.currentTimeMillis();
    }

    /**
     * get current time in milliseconds, format is {@link #DEFAULT_DATE_FORMAT}
     *
     * @return
     */
    public static String getCurrentTimeInString() {
        return getTime(getCurrentTimeInLong());
    }

    /**
     * get current time in milliseconds
     *
     * @return
     */
    public static String getCurrentTimeInString(SimpleDateFormat dateFormat) {
        return getTime(getCurrentTimeInLong(), dateFormat);
    }
}