CODEWITHSUNDEEP
androidarraysstringsharedpreferences
Gabrielle
Gabrielle

Reputation: 4981

Put and get String array from shared preferences

I need to save on shared preferences some array of Strings and after that to get them. I tried this :

prefsEditor.putString(PLAYLISTS, playlists.toString()); where playlists is a String[]

and to get :

playlist= myPrefs.getString(PLAYLISTS, "playlists"); where playlist is a String but it is not working.

How can I do this?

Upvotes: 63

Views: 65565

Answers (5)

Hitesh Tarbundiya
Hitesh Tarbundiya

Reputation: 464

Store array list in prefrence using this easy function, if you want more info Click here

 public static void storeSerializeArraylist(SharedPreferences sharedPreferences, String key, ArrayList tempAppArraylist){
    SharedPreferences.Editor editor = sharedPreferences.edit();
    try {
        editor.putString(key, ObjectSerializer.serialize(tempAppArraylist));
        editor.apply();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

And how to get stored array list from prefrence

public static ArrayList getSerializeArraylist(SharedPreferences sharedPreferences, String key){
    ArrayList tempArrayList = new ArrayList();
    try {
        tempArrayList = (ArrayList) ObjectSerializer.deserialize(sharedPreferences.getString(key, ObjectSerializer.serialize(new ArrayList())));
    } catch (IOException e) {
        e.printStackTrace();
    }
    return tempArrayList;
}

Upvotes: 0

Dan Alboteanu
Dan Alboteanu

Reputation: 10212

HashSet<String> mSet = new HashSet<>();
                mSet.add("data1");
                mSet.add("data2");
saveStringSet(context, mSet);

where

public static void saveStringSet(Context context, HashSet<String> mSet) {
    SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(context);
    SharedPreferences.Editor editor = sp.edit();
    editor.putStringSet(PREF_STRING_SET_KEY, mSet);
    editor.apply();
}

and

public static Set<String> getSavedStringSets(Context context) {
    SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(context);
    return sp.getStringSet(PREF_STRING_SET_KEY, null);
}

private static final String PREF_STRING_SET_KEY = "string_set_key";

Upvotes: 4

MikeL
MikeL

Reputation: 5611

From API level 11 you can use the putStringSet and getStringSet to store/retrieve string sets:

SharedPreferences pref = context.getSharedPreferences(TAG, Context.MODE_PRIVATE);
SharedPreferences.Editor editor = pref.edit();
editor.putStringSet(SOME_KEY, someStringSet);
editor.commit();

SharedPreferences pref = context.getSharedPreferences(TAG, Context.MODE_PRIVATE);
Set<String> someStringSet = pref.getStringSet(SOME_KEY);

Upvotes: 39

Jeff Gilfelt
Jeff Gilfelt

Reputation: 26149

You can use JSON to serialize your array as a string and store it in the preferences. See my answer and sample code for a similar question here:

How can write code to make sharedpreferences for array in android?

Upvotes: 9

Egor
Egor

Reputation: 40193

You can create your own String representation of the array like this:

StringBuilder sb = new StringBuilder();
for (int i = 0; i < playlists.length; i++) {
    sb.append(playlists[i]).append(",");
}
prefsEditor.putString(PLAYLISTS, sb.toString());

Then when you get the String from SharedPreferences simply parse it like this:

String[] playlists = playlist.split(",");

This should do the job.

Upvotes: 106

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