Storing a String array in the SharedPreferences

Question

I was wondering if it could be possible to save in the shared preferences an array of Strings, in a way that, every time we save a certain String, we store it in that array.

Answer 1

You could make the array a JSON array and then store it like this:

SharedPreferences settings = getSharedPreferences("SETTINGS KEY", 0);
SharedPreferences.Editor editor = settings.edit();

JSONArray jArray = new JSONArray();
try {
    jArray.put(id);
} catch (JSONException e) {
    e.printStackTrace();
}

editor.putString("jArray", jArray.toString());
editor.commit();

You can then get the array like this:

SharedPreferences settings = getSharedPreferences("SETTINGS KEY", 0);
try {
    JSONArray jArray = new JSONArray(settings.getString("jArray", ""));
} catch (JSONException e) {
    e.printStackTrace();
}

Just an alternative solution that I have used in the past