Append more values to Shared Preferences rather than overwriting the existing values

Question

In my app, I need the values to be saved in to Sharedpreferences file RKs_Data without overwriting the existing data. Every time, I click \'Yes\' in my app, I require all the va

Answer 1

you could CSV format your shared preference data. For example, Get CSV string from shared preference and add it to a list. Append to your list then put it back into your sharedpreferance. Code example

// init List of strings somewhere before

List  listOfFavoritePhrases = new ArrayList();

// append data into list

listOfFavoritePhrases.add("Brian|99999299999");
listOfFavoritePhrases.add("Monet|00010000000");

// Put list of strings after you have made changes back, in CSV format

SharedPreferences prefs = getSharedPreferences("PACKAGE", Context.MODE_PRIVATE);
            SharedPreferences.Editor   editor = prefs.edit();
            editor.putString("phrases",TextUtils.join(",", listOfFavoritePhrases));
            editor.commit();

// get data

     SharedPreferences prefs = getSharedPreferences("PACKAGE", Context.MODE_PRIVATE);
    String serialized = prefs.getString("phrases", "Brian");
     listOfFavoritePhrases = new ArrayList(Arrays.asList(TextUtils.split(serialized, ",")));

and then

String CurrentString = listOfFavoritePhrases.get(0); // first element
String[] separated = CurrentString.split("|");
Toast.makeText(this, separated[0], Toast.LENGTH_LONG).show(); // brian
Toast.makeText(this, separated[1], Toast.LENGTH_LONG).show(); // 99999299999

Hope this Helps.