How to display sharepreferences item in Listview android

Question

I just want to retrieve the data that save from sharedpreferences and display it in listview. Currently I just only manage to display the data with only one line in my SecondActivity. What I want is to display those data separately in listview, is there any expert how to solve this thanks in advance

My shared preferences

MainActivity to save sharedpref

public void save_append_list_tosharefpref (String data){

    List<String> favorites = new ArrayList<String>();
    SharedPreferences settings;
    SharedPreferences.Editor editor;
    settings =   PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
    editor = settings.edit();

    Map<String, ?> allPrefs = settings.getAll(); //my existing sharedPreference
    Set<String> set = allPrefs.keySet();

    if (allPrefs.toString() =="{}" || allPrefs.toString() =="[]"){
        favorites.add(data);
    }
    else {
        for(String s : set){
            favorites.add(data);
            favorites.add(allPrefs.get(s).toString());
            Log.d(TAG,"bagona"+allPrefs.get(s).toString());
        }

    }
    editor.putString(FAVORITES, favorites.toString());
    editor.commit();
}

SecondActivity

public void view_from_shared_preferences(){
    SharedPreferences settings;
    SharedPreferences.Editor editor;
    settings =   PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
    editor = settings.edit();

    Map<String, ?> allPrefs = settings.getAll(); //your sharedPreference
    Set<String> set = allPrefs.keySet();

    for(String s : set){
        Log.d(TAG,"This is all data "+allPrefs.get(s).toString());

        String rep =allPrefs.get(s).toString();
        String seps = rep.replace("]", "");
        String seps1 = seps.replace("[", "");
        Log.d(TAG,"final data "+seps1);
        arrayAdapter.add(seps1);



    }
}

Jyotish Biswas · Answer 1 · 2020-07-25T05:25:10.203

0

Why don't you Use putStringSetinstead of putString

NOTE: required api level 11

Reference of how to use putStringSet is here https://stackoverflow.com/a/7057858/12676247

edited Jul 25 '20 at 05:25

answered Jul 25 '20 at 05:13

Jyotish Biswas

674
5
11

score 0 · Answer 2 · answered Jul 25 '20 at 05:17

0

After getting string with , use

List<String> elephantList = Arrays.asList(str.split(","));

to get ArrayList and use that to set listview

answered Jul 25 '20 at 05:17

kelvin

1,480
1
14
28

thanks for response , it is tricky idea, but can you explain the details?. I tried it but it always return the same output – McLarvel Jul 25 '20 at 07:46
may be arrayAdapter.addAll(elephantList ); – kelvin Jul 25 '20 at 08:35
also i would suggest you to use sqlite to save data , sharedprefs are for key value pair type data storage. – kelvin Jul 25 '20 at 08:39

How to display sharepreferences item in Listview android

2 Answers2