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Last active April 22, 2016 12:45
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Cnnvert DateTime to --ago format
/*
* Copyright 2014 Google Inc. All rights reserved.
*
* 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.content.Context;
import android.text.TextUtils;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;
public class TimeUtils {
private static final int SECOND = 1000;
private static final int MINUTE = 60 * SECOND;
private static final int HOUR = 60 * MINUTE;
private static final int DAY = 24 * HOUR;
public static String getTimeAgo(Context ctx, Date date) {
// TODO: use DateUtils methods instead
long time;
Calendar timeCal = Calendar.getInstance();
timeCal.setTime(date);
Calendar currentCal = Calendar.getInstance();
currentCal.setTime(new Date());
// long now = System.currentTimeMillis();
time = timeCal.getTimeInMillis();
long now = currentCal.getTimeInMillis();
if (time > now || time <= 0) {
return null;
}
final long diff = now - time;
if (diff < MINUTE) {
return "just now";
} else if (diff < 2 * MINUTE) {
return "a minute ago";
} else if (diff < 50 * MINUTE) {
return diff / MINUTE + " minutes ago";
} else if (diff < 90 * MINUTE) {
return "an hour ago";
} else if (diff < 24 * HOUR) {
return diff / HOUR + " hours ago";
} else if (diff < 48 * HOUR) {
return "yesterday";
} else {
return diff / DAY + " days ago";
}
}
private static final SimpleDateFormat[] ACCEPTED_TIMESTAMP_FORMATS = {
new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss Z", Locale.US),
new SimpleDateFormat("EEE MMM dd HH:mm:ss yyyy", Locale.US),
new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.US),
new SimpleDateFormat("yyyy-MM-dd HH:mm:ss Z", Locale.US),
new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ", Locale.US),
new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'", Locale.US),
new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss Z", Locale.US)
};
private static final SimpleDateFormat VALID_IFMODIFIEDSINCE_FORMAT =
new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss Z", Locale.US);
public static Date parseTimestamp(String timestamp) {
for (SimpleDateFormat format : ACCEPTED_TIMESTAMP_FORMATS) {
format.setTimeZone(TimeZone.getTimeZone("GMT"));
try {
return format.parse(timestamp);
} catch (ParseException ex) {
continue;
}
}
// All attempts to parse have failed
return null;
}
public static boolean isValidFormatForIfModifiedSinceHeader(String timestamp) {
try {
return VALID_IFMODIFIEDSINCE_FORMAT.parse(timestamp) != null;
} catch (Exception ex) {
return false;
}
}
public static long timestampToMillis(String timestamp, long defaultValue) {
if (TextUtils.isEmpty(timestamp)) {
return defaultValue;
}
Date d = parseTimestamp(timestamp);
return d == null ? defaultValue : d.getTime();
}
}
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