Create favorite listview with shared preferences

Question

I have a listview of ringtones .. I feed the list via mysql database.. (such as song names,song urls ...). I dynamically add products(ringtones) in my listview by adding new ite

Answer 1

There are two problems here (based on your project)

First (saving state of bookmark Imageview)

In adapter create a method that checks whether a particular product exists in SharedPreferences

    public boolean checkFavoriteItem(Product checkProduct) {
    boolean check = false;
    List favorites = sharedPreference.getFavorites(null, mContext);
    if (favorites != null) {
        for (Product product : favorites) {
            if (product.equals(checkProduct)) {
                check = true;
                break;
            }
        }
    }
    return check;
}

Inside adapter check if a product exists in shared preferences then set bookmarked drawable and set a tag

if (checkFavoriteItem(product)) {
        holder.favoriteImg.setImageResource(R.mipmap.bookmarked);
        holder.favoriteImg.setTag("bookmarked");
    } else {
        holder.favoriteImg.setImageResource(R.mipmap.bookmark_border);
        holder.favoriteImg.setTag("bookmark_border");
    }

Then inside favOnClick callback method

    @Override
    public boolean favOnClick(int position ,View v) {
        Product product = (Product) productList.get(position);
        ImageView button = (ImageView) v.findViewById(R.id.favImage);
        String tag = button.getTag().toString();
        if (tag.equalsIgnoreCase("bookmark_border")) {
            sharedPreference.addFavorite(activity,product);
            Toast.makeText(activity,"Added to Favorites",Toast.LENGTH_SHORT).show();
            button.setTag("bookmarked");
            button.setImageResource(R.mipmap.bookmarked);
        } else {
            sharedPreference.removeFavorite(activity,product);
            button.setTag("bookmark_border");
            button.setImageResource(R.mipmap.bookmark_border);
            Toast.makeText(activity,"Removed from Favorites",Toast.LENGTH_SHORT).show();
        }
        return true;
        }

Second (get favorite product and pass it to "FAVORITE" Fragment)

Inside getFavorite method add a String parameter Then in your "FAVORITE" Fragment with processFinish(your AsyncResponse) call your getFavorite in order to get your Favorite product list then set your adapter :

Context mContext;
`mContext = getContext();`

@Override
public void  processFinish(String s) {
    productList = sharedPreference.getFavorites(s, mContext);

    BindDictionary dict = new BindDictionary();
    dict.addStringField(R.id.tvName, new StringExtractor() {
        @Override
        public String getStringValue(Product product, int position) {
            return product.name;
        }
    });


    dict.addStringField(R.id.tvDescription, new StringExtractor() {
        @Override
        public String getStringValue(Product product, int position) {
            return product.description;

        }
    });


    dict.addStringField(R.id.tvQty, new StringExtractor() {
        @Override
        public String getStringValue(Product product, int position) {
            return "" + product.qty;

        }
    });


    adapter = new FunDapter<>(getActivity(), productList, R.layout.d_layout_list_d, dict);
    lvProduct.setAdapter(adapter);

}