Add To Favourites

private void addToFavorites(MenuItem item) {
        SharedPreferences sharedPreferences = new SharedPreferences(getApplicationContext());
        sharedPreferences.saveBoolean(title.toLowerCase().replaceAll(" ", "_").trim(), !sharedPreferences.getBoolean(title.toLowerCase().replaceAll(" ", "_").trim(), false));
        if (sharedPreferences.getBoolean(title.toLowerCase().replaceAll(" ", "_").trim(), false)) {
            item.setIcon(getResources().getDrawable(R.drawable.ic_action_favorite));
            Toast.makeText(getApplicationContext(), R.string.added_to_favorites, Toast.LENGTH_SHORT).show();
        }
        else {
            item.setIcon(getResources().getDrawable(R.drawable.ic_action_favorite_outline));
            Toast.makeText(getApplicationContext(), R.string.removed_from_favorites, Toast.LENGTH_SHORT).show();
        }
        MainActivity.updateDrawer(getApplicationContext());
    }


//Then to loop through the array and check if that item exists in Shared Preferences
 for (int ii = 0; ii < jsonArrayWallpaper.length(); ii++) {
                        if (sharedPreferences.getBoolean(jsonArrayWallpaper.getJSONObject(ii).getString("title").toLowerCase().replaceAll(" ", "_").trim(), false)) {
                            icon.add(jsonArrayWallpaper.getJSONObject(ii).getString("url"));
                            title.add(jsonArrayWallpaper.getJSONObject(ii).getString("title"));
                            author.add(jsonArrayWallpaper.getJSONObject(ii).getString("author"));
                        }
                    }