I am trying to implement add to cart functionality using recycler and card views. My catalog is well populated and everything is alright. Or so I think, what I need now is to allow user to add an item to their cart when some button is clicked.
I tried using intents and shared preferences but always one item is passed. I don't know what I am doing wrong. Here is my adapter, the detailsActivity from where one adds items to the cart,the cart activity and the modal I'm using respectively.
Please see my code:
public class CartAdapter extends RecyclerView.Adapter<CartAdapter.myHolder> {
private final List<CartItems> list;
private Context context;
CartAdapter(List<CartItems> list,Context context) {
this.list = list;
this.context = context;
}
@Override
public myHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.cart_list, parent, false);
return new myHolder(v);
}
@Override
public void onBindViewHolder(final myHolder holder,final int position) {
final CartItems listItem = list.get(position);
holder.setIsRecyclable(true);
holder.item_name.setText(listItem.getItem());
holder.quan.setText(listItem.getQuan());
holder.cost.setText(listItem.getCost());
holder.cardView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
}
@Override
public int getItemCount() {
return list.size();
}
static class myHolder extends RecyclerView.ViewHolder {
final TextView item_name;
final TextView quan;
final TextView cost;
final CardView cardView;
final ImageView imageView;
myHolder(View itemView) {
super(itemView);
item_name = itemView.findViewById(R.id.ph_no);
quan = itemView.findViewById(R.id.tv_year);
cost = itemView.findViewById(R.id.msg);
cardView = itemView.findViewById(R.id.card_view);
imageView = itemView.findViewById(R.id.cart_image);
}
}
void addItems(List<CartItems> list,int position){
CartItems cartItems = new CartItems();
cartItems.setCost(cartItems.getCost());
cartItems.setImageId(cartItems.getImageId());
cartItems.setItem(cartItems.getItem());
cartItems.setQuan(cartItems.getQuan());
list.add(position, cartItems);
notifyItemInserted(position);
notifyDataSetChanged();
}}
DetailsActivity;
public class DetailsActivity extends BaseActivity {
RoundedImageView imageView;
AppCompatTextView textView, textView1, price, quantity, multiplier;
AppCompatImageButton btn_add, btn_sub;
FloatingActionButton fabAdd;
int c = 1;
private RecyclerView rvList;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.layout_details);
init();
String pathString = String.valueOf(getIntent().getStringExtra("text"));
final String image = getIntent().getStringExtra("image");
final String quan = getIntent().getStringExtra("quantity");
final String pric = getIntent().getStringExtra("price");
imageView.setBackgroundResource(Integer.parseInt(image));
textView.setText(pathString);
quantity.setText(MessageFormat.format("{0}{1}", getApplicationContext().getResources().getString(R.string.quan_tag), quan));
price.setText(MessageFormat.format("{0}{1}", getApplicationContext().getResources().getString(R.string.price_tag), pric));
btn_sub.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
textView1.setText("");
c--;
if (c < 1) {
textView1.setText(String.valueOf(1));
c = 1;
} else if (c > 0) {
textView1.setText(String.valueOf(c));
String pri = price.getText().toString();
String Price = pri.replace("ksh", "");
String Pric = Price.replace("Price:", "");
String sub = pric.replace("ksh", "");
price.setText(MessageFormat.format("{0}ksh", String.valueOf(getApplicationContext().getResources().getString(R.string.price_tag) + (Integer.parseInt(Pric) - Integer.parseInt(sub)))));
multiplier.setText(String.valueOf(c));
}
}
});
btn_add.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
textView1.setText("");
c++;
textView1.setText(String.valueOf(c));
String Price = pric.replace("ksh", "");
price.setText(MessageFormat.format("{0}ksh", String.valueOf(getApplicationContext().getResources().getString(R.string.price_tag) + Integer.parseInt(Price) * c)));
multiplier.setText(String.valueOf(c));
}
});
fabAdd.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String cost = price.getText().toString();
String quan = quantity.getText().toString();
String item = textView.getText().toString();
Intent intent = new Intent(getApplicationContext(), CartActivity.class);
intent.putExtra("item",item);
intent.putExtra("cost",cost);
intent.putExtra("quan",quan);
intent.putExtra("image",image);
List<CartItems> list = new ArrayList<>();
CartItems listItem;
listItem = new CartItems();
listItem.setItem(item);
listItem.setQuan(quan);
listItem.setCost(cost);
listItem.setImageId(Integer.parseInt(image));
list.add(listItem);
CartAdapter listAdapter = new CartAdapter(list,getApplication());
listAdapter.addItems(list,list.size());
startActivity(intent);
}
});
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
finish(); //here add your back function code.
return true;
default:
return super.onOptionsItemSelected(item);
}
}
public void init() {
imageView = findViewById(R.id.item_image);
textView = findViewById(R.id.item_name);
btn_add = findViewById(R.id.btn_add);
btn_sub = findViewById(R.id.btn_sub);
textView1 = findViewById(R.id.tv);
price = findViewById(R.id.price);
quantity = findViewById(R.id.quan);
multiplier = findViewById(R.id.quan_true);
fabAdd = findViewById(R.id.fab);
}}
CartActivity;
public class CartActivity extends BaseActivity {
private RecyclerView.LayoutManager mLayoutManager;
private RecyclerView rvList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.layout_cart);
rvList = (RecyclerView) findViewById(R.id.rvList);
List<CartItems> list = new ArrayList<>();
CartItems listItem;
listItem = new CartItems();
String cost = getIntent().getStringExtra("item");
String quan = getIntent().getStringExtra("quan");
String item = getIntent().getStringExtra("cost");
String image = getIntent().getStringExtra("image");
listItem.setItem(item);
listItem.setQuan(quan);
listItem.setCost(cost);
listItem.setImageId(Integer.parseInt(image));
list.add(listItem);
CartAdapter listAdapter = new CartAdapter(list,getApplicationContext());
listAdapter.notifyDataSetChanged();
listAdapter.addItems(list,list.size());
rvList.setAdapter(listAdapter);
rvList.setLayoutManager(new LinearLayoutManager(getApplicationContext(), LinearLayoutManager.VERTICAL, false));
}}
and finally the modal class
class CartItems extends ArrayList<String> {
private String Item, Quan, Cost;
private int ImageId;
String getItem() {
return Item;
}
void setItem(String item) {
Item = item;
}
String getQuan() {
return Quan;
}
void setQuan(String quan) {
Quan = quan;
}
String getCost() {
return Cost;
}
void setCost(String cost) {
Cost = cost;
}
int getImageId() {
return ImageId;
}
void setImageId(int imageId) {
ImageId = imageId;
}}
