How to store Array list in shared preferences and access in another fragment

Question

I want to save this array list data in sharedpreferences and access that data in another fragment .Please Give me suggestion

Array list content given bellow

public String productname;
public String productunit;
public String productquantity;
public String productprice;
public String productdiscount;

Serialize the ArrayList using gson then save that data. Another option is to pass these data in a bundle to the fragment. — Zun, Dec 03 '18 at 12:56
*I want to save this array list data in sharedpreferences*. it is bad idea. instance pass the `arralist` `object` using bundle. Refer Link: https://stackoverflow.com/questions/43909061/passing-object-array-list-between-fragments-in-android-development — Ali, Dec 03 '18 at 12:58
best way send data in Argument or otherwise save data as json string in sharedpreferences, — kuber singh, Dec 03 '18 at 13:03

score 0 · Answer 1 · answered Dec 03 '18 at 13:06

Here is solution, Step 1: Create a class like

SharedPreference

public static final String FAVORITES = "PRODUCTS";
private SharedPreferences settings;
private Editor editor;

public SharedPreference() {
    super();
}

Now code to save ArrayList

 public void saveArrayList(Context context, List<String> unread_ids) {
    settings = context.getSharedPreferences(AppConfig.KEY_PREFS_NAME,
            Context.MODE_PRIVATE);
    editor = settings.edit();
    Gson gson = new Gson();
    String jsonFavorites = gson.toJson(unread_ids);
    editor.putString(FAVORITES, jsonFavorites);
    editor.apply();
}

Now code to get saved Arraylist

public ArrayList<String> getSavedList(Context context) {
    // SharedPreferences settings;
    List<String> unReadId;

    settings = context.getSharedPreferences(AppConfig.KEY_PREFS_NAME,
            Context.MODE_PRIVATE);

    if (settings.contains(FAVORITES)) {
        String jsonFavorites = settings.getString(FAVORITES, "");
        Gson gson = new Gson();
        String[] favoriteItems = gson.fromJson(jsonFavorites,
                String[].class);

        unReadId = Arrays.asList(favoriteItems);
        unReadId = new ArrayList<>(unReadId);

    } else {
        return new ArrayList<String>();
    }

    return (ArrayList<String>) unReadId;
}

Code to save list:

sharedPreferences.saveArrayList(context, <YOUR LIST NAME>);

Now code to get your Arraylist in other Fragment

<LIST NAME> = sharedPreference.getSavedList(getActivity());

Before get and save array list you have to declare "sharedPreference" and create its object.

Hope this will help you.

will you please explain properly ...i am not getting your code. will you please share whole file — anup dabadgavakar, Dec 03 '18 at 13:24
Hi, @anupdabadgavakar, here is project to save arraylist and use later. Link :https://github.com/Sanwal13/SaveArrayInShdPrefs — Sanwal Singh, Dec 04 '18 at 09:48
@anupdabadgavakar If this helps you, then accepts the answer. — Sanwal Singh, Dec 06 '18 at 11:16

score 0 · Answer 2 · answered Dec 03 '18 at 15:14

I did something similar to this before Please check this code

private List<String> list; /// adding checked items to list

inside your OnCreate() add this line

list = new ArrayList<>(); /// checked items list

and to get array from model and store it local please use next.

int searchListLength = items.size();
        for (int i = 0; i < searchListLength; i++) {
            if (items.get(i).isChecked()) {
                items.get(i).getId();
                Log.d("listitem", String.valueOf("id=" + items.get(i).getId()));
                list.add("id=" + items.get(i).getId());
            }
        }
        StringBuilder stringBuilder = new StringBuilder();
        for (String s : list) {
            stringBuilder.append(s);
            stringBuilder.append("&");
        }

  SharedPreferences notif_array = getSharedPreferences("items_array", Context.MODE_PRIVATE);
            SharedPreferences.Editor editor_notaif = notif_array.edit();
            editor_notaif.putString("id", stringBuilder.toString());
            editor_notaif.apply();
            Intent intent = new Intent(MainActivity.this, Filtered_Activity.class);
            startActivity(intent);

Inside your another activity / fragment

private String new_result;

SharedPreferences notif_array = getSharedPreferences("items_array", Context.MODE_PRIVATE);
        new_result = notif_array.getString("id", null);

How to store Array list in shared preferences and access in another fragment

2 Answers2