How to store and read an integer in Internal Storage

Question

I have been spending the last few hours researching on how to store data within internal storage however I cannot for some reason be capable of storing an integer.

I would like to know how to store an int value within a file as well as be able to read off of it. Please provide a brief example on how I can achieve this and would it be preferable to use the SharedPreferences class?

If you are considering to save one value, it is much advisable to use SharedPreferences than file handling. — Swayam, Sep 01 '12 at 20:21
http://stackoverflow.com/questions/3572780/android-sharedpreference — Swayam, Sep 01 '12 at 20:23

score 1 · Answer 1 · answered Sep 01 '12 at 20:22

Yes I think SharedPreferences would be the easiest way :

SharedPrefrences prefs=PreferenceManager.getDefaultSharedPreferences(context);
Editor editor=prefs.edit();
editor.putInt("MYINT",intValue);
editor.commit();

To retrieve the int use :

PreferenceManger.getDefaultSharedPreferences(context).getInt("MYINT",-1);

score 1 · Accepted Answer · answered Sep 01 '12 at 20:23

1

It is better to use SharedPreference if it is just an int value:

public int getValue() {
    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
    return prefs.getInt("value_key", 0);
}

public void setValue(int newValue) {
    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
    SharedPreferences.Editor editor = prefs.edit();
    editor.putInt("value_key", newValue);
    editor.commit();
}

answered Sep 01 '12 at 20:23

iTurki

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Thank you very much. Worked perfectly. – ChallengeAccepted Sep 01 '12 at 20:46
One more thing; I want to check if the file exists, how would I use the .exist() method with this code? – ChallengeAccepted Sep 01 '12 at 20:49
You mean you want to check if there is a value before you put one? – iTurki Sep 01 '12 at 20:50
When the activity runs, I wish it to check if the file was created. If it exists, it will read it, otherwise it will create the file. Would I just use an if statement seeking if the value == 0? I wish for it to read the file before it overwrites the file. – ChallengeAccepted Sep 01 '12 at 20:52
Yes. if `prefs.getInt()` returns `0` this means there is no value with a key `value_key`. You can put `-1` instead of `0` if you want. – iTurki Sep 01 '12 at 20:54
I appreciate your help very much! :) – ChallengeAccepted Sep 01 '12 at 20:56
@ChallengeAccepted Any time :-) – iTurki Sep 01 '12 at 20:57

How to store and read an integer in Internal Storage

2 Answers2