Develop Reference

how can i get the date full time of specific string format

I have an API contains string date with this format "/Date(1527677209864)/", how can I get the date and time to be used in Android app

You can use Date with the epoch number as a parameter in the constructor.
First you have to strip /Date( and )/ from the string, this you can do with regex.
Pattern pattern = Pattern.compile("\\D+([0-9]+)\\D+");
Matcher matcher = pattern.matcher("/Date(1527677209864)/");
if (matcher.matches()) {
long timestamp = Long.parseLong(matcher.group(1));
Date actualDate = new Date(timestamp);
}

I'm assuming that 1527677209864 value is a timestamp, right?
Try this function:
public static String getDateAndTime(#NotNull Context context, long timestamp) {
Date date = new Date(timestamp * 1000);
Calendar calendar = new GregorianCalendar();
calendar.setTime(date);
DateFormat df = new SimpleDateFormat(getTimeFormat(context), Locale.getDefault());
return df.format(date);
}
Let me know if this is what you were looking for.

Remove the prefix /Date( and suffix )/. Use the result to initialize a java.util.Date.
String dt = "/Date(1527677209864)/";
dt = dt.substring(6, dt.indexOf(")/"));
long timestamp = Long.parseLong(dt);
Date date = new Date(timestamp);
Use SimpleDateFormat to format this date to your required format.

We have to filter the timeInMillis value from the string and convert it to long so that we can use or set it in calendar and get the date object.
Date convertToDate(String input) {
// input = "/Date(1527677209864)/";
String timeString = input.substring(6, input.length() - 2);
Long time = Long.parseLong(timeString);
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(time);
return calendar.getTime();
}
Then we can format the date object to string according to our desire patter or format.
String convertDateToString(Date date, String pattern) {
SimpleDateFormat formatter = new SimpleDateFormat(pattern);
return formatter.format(date);
}

Try this
String jsonDate = "/Date(1527677209864)/";
jsonDate = jsonDate.substring(6, 13);
int unix_timestamp = Integer.parseInt(jsonDate);
Date date = new Date(unix_timestamp);

Android GreenDao - How to compare to two date strings?

I have few string properties with custom type java.util.Date added in MainGenerator class.
In querybuilder how can I compare these strings with ge or le or gt or lt.
I save the db values in string type and I compare them like this
qb.queryBuilder().where(TestDao.Properties.Date_entered.ge(start)).list();
It doesn't work.

If you are using greenDao then in your MainGenerator you must be having the date as
testdao.addDateProperty("date_entered").notNull();
So in qb.queryBuilder().where(TestDao.Properties.Date_entered.ge(start)).list();
start should be java.util.Date.

Dates are persisted as timestamps of type long. Thus, for your query parameters, you should also use long values.

First Parse your date in String as you are saving date in database in string format. Then query data. Here is sample code.
SimpleDateFormat dateFormat;
Calendar calendar = Calendar.getInstance();
//Modify Calendar here according to your requirement.
dateFormat=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.getDefault());
//Check if you have different date format then replace in above line.
String dateString = dateFormat.format(calendar.getTime());
//Then query your data
qb.queryBuilder().where(TestDao.Properties.Date_entered.ge(dateString )).list();

You can convert String date into milliseconds and can compare the values for your result:
public boolean checkDates(String date1, String date2) {
long milliDate1 = getMilliFromDate(date1);
long milliDate2 = getMilliFromDate(date2);
//Check date according to your requirement and condition
return milliDate1 < milliDate2;
}
public long getMilliFromDate(String dateFormat) {
Date date = new Date();
// "dd/MM/yyyy" this is date format i use you can use your own
//format which you are storing in local database like time stamp "yyyy-MM-dd HH:mm:ss"
SimpleDateFormat formatter = new SimpleDateFormat("dd/MM/yyyy");
try {
date = formatter.parse(dateFormat);
} catch (ParseException e) {
e.printStackTrace();
}
return date.getTime();
}

Comparison of Date and Time

I have to get count of days which are past to the current day.I have list of days in arraylist.I got the list and I dont know how to compare?Can anyone help me?
This is the code I tried,
private void weeklylogeval(){
int i;
DateFormat dateFormatter = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
dateFormatter.setLenient(false);
Date today = new Date();
String s = dateFormatter.format(today);
System.out.println("current date & time new:::"+s);
for(i=0;i<datetime.size();i++){
String daytime=datetime.get(i);
if(today.before(daytime))
}
}
Pls some one help me!

Try this code for date difference manipulation.
String fd=from_date;//date get from mysql database as string.
String td=to_date;//Today's date as string.
if(!fd.equalsIgnoreCase("") && !td.equalsIgnoreCase("")){
SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
SimpleDateFormat formatter;
Date frmdt=new Date(fd);
formatter = new SimpleDateFormat("dd/MM/yyyy");
String s1 = formatter.format(frmdt);
Date todt=new Date(td);
String s2 = formatter.format(todt);
Date frmdate = sdf.parse(s1);
Date todate = sdf.parse(s2);
if(frmdate.compareTo(todate)<=0) {
//do your stuff
} else {
// do your stuff
}
}

http://developer.android.com/reference/java/util/Calendar.html
This should be allot easier to use for your purpose
Edit:
Methods you can use:
boolean after(Object calendar)
Returns whether the Date represented by this Calendar instance is after the Date represented by the parameter.
boolean before(Object calendar)
Returns whether the Date represented by this Calendar instance is before the Date represented by the parameter.

Maybe you can construct a Date form the String you get from DB, and then use today.before(daytime) to compare them.
Date daytime = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss").parse(datetime.get(i));

How can i convert dropbox log timestamp?

I am debugging a android framework.
I pull out dropbox logs from device and it's created in /data/system/dropbox.
Log file name is printed like this format.
event_data#1362451303699
1362451303699 is timestamp and i want to change it like 05/03/2013 16:00 for legibility.
How can i convert this timestamp?
Is there any code needs to be changed?
Any help will be much appreciated.

use: Date date = new Date(timestamp);
Edit full code:
String wantedDate = "";
String log = "event_data#1362451303699";
int index = log.indexOf("#");
if(index != -1) {
index = index + 1; // skip # symbol
if(index < log.length()) { // avoid out of bounds
String logtime = log.substring(+1);
try {
long timestamp = Long.parseLong(logtime);
SimpleDateFormat df = new SimpleDateFormat("dd/MM/yyyy HH:mm");
Date date = new Date(timestamp);
wantedDate = df.format(date);
} catch (NumberFormatException nfe) {
// not a number
}
}
}
if( ! "".equals(wantedDate) ) {
// everything OK
} else {
// error cannot retrieve date!
}
Related doc:
indexOf : http://developer.android.com/reference/java/lang/String.html#indexOf%28java.lang.String%29
SimpleDateFormat : http://developer.android.com/reference/java/text/SimpleDateFormat.html

you can use a SimepleDateFormat to parse it. For example:
long ts = 1362451303699;
Date date = new Date(ts);
SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy HH:mm");
System.out.println(sdf.format(date));
With the SimpleDateFormat you can bring your Date in a more readable format.

It is a UNIX epoch timestamp, all you need to do is to convert the String representation of the number to long, then you can use it to create a Date object, which you can format with DateFormat. Something like this:
// Get this from the log
String timestamp = "1362451303699";
long epoch = Long.parseLong(timestamp);
Date date = new Date(epoch);
DateFormat format = new SimpleDateFormat("dd/MM/yyyy HH:mm");
String formattedDate = format.format(date);

Convert a combined Date and Time String to long value?

I am trying to get long value of a string (date & time string), but it is not working. What I am trying to do is:
Choose date form datepicker and store it in a String
Choose time from timepicker and store it in a String
Then I concatenate these two strings and get long value from that string.
I have tried a few Date formatters but I am unable to get this done. The format of my string is dd-MM-yyy h:mm a. Please help me out of this. Provide any utility available for this.

Try this:-
SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yyy h:mm a");
Date myDate = new Date(); // Default Value.
try {
myDate = sdf.parse(dateString);
} catch (ParseException e) {
// Do Something on Error.
}
Long dateTimeinLong = myDate.getTime();
where dateString is your concatenated String of date and time.

Forget about strings, and go directly with the values:
DatePicker dp = (DatePicker) findViewById...
TimePicker tp = (TimePicker) findViewById...
Date timeStamp = new Date( dp.getYear(), dp.getMonth(), dp.getDay(), tp.getHour(), tp.getMinute(), 0 );
long longTime = timeStamp.getTime();