CODEWITHSUNDEEP
javaandroidio
Amir Rachum
Amir Rachum

Reputation: 79735

What is the way to store a date in a file?

I'm writing a small android app that lets the user pick a date and it shows him how many days are left to this date. Now I would like to store that date so that next time the app starts, it will keep the information. I was thinking it's probably best to save the date in a file, and my question is - how is it best to do this so it'll be easy to parse that date afterwards?

Upvotes: 2

Views: 145

Answers (3)

st0le
st0le

Reputation: 33565

I speak from experience, The Best way to store a Date is to store it's UNIX Epoch time, 

SharedPreferences settings = getSharedPreferences("my_prefs", 0);
  SharedPreferences.Editor editor = settings.edit();
  editor.putString("date", myDate.getTime() ); //getTime is a long (So store it as a string/long, doesn't really matter)
  editor.commit();

It'll save you the time/code from parsing it.

When retrieving the Date, just use the new Date(long date) Constructor or the Calendar class also has setTimeinMillis.

Good Luck.

Upvotes: 2

Alexander
Alexander

Reputation: 48272

Save it to application preferences. In your Activity you might have somethign like:

PreferenceManager.getDefaultSharedPreferences(getApplicationContext()) .edit().putString("date", myDate.toString()).commit();

Then you restore your date from that saved string.

Upvotes: 0

ct_rob
ct_rob

Reputation: 521

Easiest way is probably to use the SharedPreferences:

Save in prefs:

  SharedPreferences settings = getSharedPreferences("my_prefs", 0);
  SharedPreferences.Editor editor = settings.edit();
  editor.putString("date", myDate);
  editor.commit();

Restore:

   SharedPreferences settings = getSharedPreferences("my_prefs", 0);
   String date = settings.getString("date", null);

Upvotes: 3

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