android - Storing Array List Object in SharedPreferences

Question

This method add new object into ArrayList

//get text from textview
time = date.getText().toString();
entry_d = entry.getText().toString();
dayName = day.getText().toString();

arrayList.add( new ArrayObject( dayName, entry_d ,time));

I am trying to add these 3 strings in SharedPrefrences. Here is my code:

private void savePreferences(String key, String value) {

    SharedPreferences sharedPreferences = PreferenceManager             
                                     .getDefaultSharedPreferences(this);
    Editor editor = sharedPreferences.edit();
    editor.putBoolean(key, value);
    editor.commit();
}

This method only add one string at a time where as I want to add 3 strings in one go. Is there any method I can implement.

Answer 1

Convert your array or object to Json with Gson library and store your data as String in json format.

Save;

SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
Editor editor = sharedPrefs.edit();
Gson gson = new Gson();

String json = gson.toJson(arrayList);

editor.putString(TAG, json);
editor.commit();

Read;

SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
Gson gson = new Gson();
String json = sharedPrefs.getString(TAG, "");
Type type = new TypeToken<List<ArrayObject>>() {}.getType();
List<ArrayObject> arrayList = gson.fromJson(json, type);