add fitur cart

app/src/main/java/com/example/yourcashiertest/activities/CartActivity.java

 package com.example.yourcashiertest.activities;
 
+import androidx.annotation.RequiresApi;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.databinding.DataBindingUtil;
+import androidx.lifecycle.Observer;
+import androidx.lifecycle.ViewModelProvider;
+import androidx.recyclerview.widget.LinearLayoutManager;
+
 import android.content.Intent;
+import android.os.Build;
 import android.os.Bundle;
 
 import com.example.yourcashiertest.R;
 import com.example.yourcashiertest.adapters.CartAdapter;
 import com.example.yourcashiertest.databinding.ActivityCartBinding;
+import com.example.yourcashiertest.entities.Cart;
+import com.example.yourcashiertest.viewmodels.CartViewModel;
 
 import java.text.DecimalFormat;
 import java.text.DecimalFormatSymbols;
+import java.util.List;
 
 public class CartActivity extends AppCompatActivity {
     ActivityCartBinding binding;
@@ -21,14 +30,47 @@ public class CartActivity extends AppCompatActivity {
         super.onCreate(savedInstanceState);
         binding = DataBindingUtil.setContentView(this, R.layout.activity_cart);
 
-//        adapter = new CartAdapter();
-//        binding.rvCartList.setLayoutManager(new LinearLayoutManager(this));
-//        binding.rvCartList.setAdapter(adapter);
+        adapter = new CartAdapter();
+        binding.rvCartList.setLayoutManager(new LinearLayoutManager(this));
+        binding.rvCartList.setAdapter(adapter);
+
+        CartViewModel cartViewModel = new ViewModelProvider(this).get(CartViewModel.class);
+        cartViewModel.getCarts().observe(this, carts -> adapter.setCartList(carts));
+
+        cartViewModel.getCarts().observe(this, new Observer<List<Cart>>() {
+            @Override
+            public void onChanged(List<Cart> carts) {
+                int sum = 0;
+                for (int i = 0; i < carts.size(); i++){
+                    sum += carts.get(i).getPrice();
+                }
+                binding.tvTotalPrice.setText(String.valueOf(sum));
+            }
+        });
+
+        adapter.setCartListener(new CartAdapter.CartListener() {
+            @RequiresApi(api = Build.VERSION_CODES.N)
+            @Override
+            public void onIncrease(Cart cart) {
+                cart.setQty(cart.getQty() + 1);
+                cart.setPrice(Math.multiplyExact(cart.getRealPrice(), cart.getQty()));
+                cartViewModel.updateCart(cart);
+            }
+
+            @RequiresApi(api = Build.VERSION_CODES.N)
+            @Override
+            public void onDecrease(Cart cart) {
+                cart.setQty(cart.getQty() - 1);
+                if (cart.getQty() == 0){
+                    cartViewModel.deleteCart(cart);
+                }else {
+                    cart.setPrice(Math.multiplyExact(cart.getRealPrice(), cart.getQty()));
+                    cartViewModel.updateCart(cart);
+                }
+            }
+        });
 
-//        CartViewModel cartViewModel = new ViewModelProvider(this).get(CartViewModel.class);
-//        cartViewModel.getCarts().observe(this, carts -> adapter.setCartList(carts));
-//
-//        binding.setViewModelCart(cartViewModel);
+        binding.setViewModelCart(cartViewModel);
 
         binding.ivBtnBack.setOnClickListener(view -> startActivity(new Intent(CartActivity.this, MainActivity.class)));
         binding.btnCheckout.setOnClickListener(view -> {

app/src/main/java/com/example/yourcashiertest/activities/MainActivity.java

@@ -15,10 +15,12 @@ import android.text.TextWatcher;
 import android.view.Menu;
 import android.view.View;
 import android.widget.PopupMenu;
+import android.widget.Toast;
 
 import com.example.yourcashiertest.R;
 import com.example.yourcashiertest.adapters.ProductAdapter;
 import com.example.yourcashiertest.databinding.ActivityMainBinding;
+import com.example.yourcashiertest.entities.Cart;
 import com.example.yourcashiertest.entities.Product;
 import com.example.yourcashiertest.models.CartModel;
 import com.example.yourcashiertest.viewmodels.CartViewModel;
@@ -49,8 +51,11 @@ public class MainActivity extends AppCompatActivity {
         ProductAdapter adapter = new ProductAdapter();
         binding = DataBindingUtil.setContentView(this, R.layout.activity_main);
 
-//        cartViewModel = new ViewModelProvider(this).get(CartViewModel.class);
-
+        cartViewModel = new ViewModelProvider(this).get(CartViewModel.class);
+        cartViewModel.getCarts().observe(this, carts -> {
+            if (carts.size() != 0) binding.tvCount.setText(String.valueOf(carts.size()));
+            else binding.tvCount.setText(String.valueOf(0));
+        });
         String name = getIntent().getStringExtra(LoginActivity.DATA_LOGIN);
         binding.tvUser.setText(name);
         // settings menu
@@ -129,20 +134,15 @@ public class MainActivity extends AppCompatActivity {
 
 
     public void addToCart(Product product){
-//        Cart cart = new Cart(0,"", "", 0, 0);
-//        cart.setIdProduct(product.getId());
-//        cart.setImage(product.getPhoto());
-//        cart.setNameProduct(product.getName());
-//        cart.setPrice(product.getPrice());
-//        cart.setQty(1);
-//        cartViewModel.insertCart(cart);
-        List<CartModel> list = new ArrayList<>();
-        CartModel cart = new CartModel();
+        Cart cart = new Cart(0,"", "", 0, 0, 0);
         cart.setIdProduct(product.getId());
-        cart.setNameProduct(product.getName());
         cart.setImage(product.getPhoto());
+        cart.setNameProduct(product.getName());
         cart.setPrice(product.getPrice());
-        cart.setQty(product.getQuantity());
+        cart.setQty(1);
+        cart.setRealPrice(product.getPrice());
+        cartViewModel.insertCart(cart);
+        Toast.makeText(MainActivity.this, "Data berhasil ditambahkan ke keranjang", Toast.LENGTH_LONG).show();
     }
 
 

app/src/main/java/com/example/yourcashiertest/adapters/CartAdapter.java

@@ -14,6 +14,8 @@ import com.example.yourcashiertest.entities.Cart;
 import com.example.yourcashiertest.entities.Product;
 import com.example.yourcashiertest.models.CartModel;
 
+import java.text.DecimalFormat;
+import java.text.DecimalFormatSymbols;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -22,8 +24,8 @@ public class CartAdapter extends RecyclerView.Adapter<CartAdapter.ViewHolder> {
     private List<Cart> carts = new ArrayList<>();
 
     public interface CartListener{
-        void onIncrease();
-        void onDecrease();
+        void onIncrease(Cart cart);
+        void onDecrease(Cart cart);
     }
 
     private CartListener listener;
@@ -56,7 +58,8 @@ public class CartAdapter extends RecyclerView.Adapter<CartAdapter.ViewHolder> {
 
     @Override
     public int getItemCount() {
-        return carts.size();
+        if (carts.size() != 0)return carts.size();
+        else return 0;
     }
 
     public class ViewHolder extends RecyclerView.ViewHolder {
@@ -72,6 +75,19 @@ public class CartAdapter extends RecyclerView.Adapter<CartAdapter.ViewHolder> {
         public void bindData(Cart cart, CartListener listener) {
             cartItemBinding.setCartProduct(cart);
 
+            DecimalFormat rupiah = (DecimalFormat) DecimalFormat.getCurrencyInstance();
+            DecimalFormatSymbols format = new DecimalFormatSymbols();
+
+            format.setCurrencySymbol("Rp. ");
+            format.setMonetaryDecimalSeparator(',');
+            format.setGroupingSeparator('.');
+
+            rupiah.setDecimalFormatSymbols(format);
+            cartItemBinding.setPrice(rupiah.format(cart.getPrice()));
+
+            cartItemBinding.btnAdd.setOnClickListener(view -> listener.onIncrease(cart));
+            cartItemBinding.btnMin.setOnClickListener(view -> listener.onDecrease(cart));
+
         }
     }
 }

app/src/main/java/com/example/yourcashiertest/databases/LocalDatabase.java

@@ -20,11 +20,11 @@ import com.example.yourcashiertest.entities.Product;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 
-@Database(entities = {Product.class}, version = 1, exportSchema = false)
+@Database(entities = {Product.class, Cart.class}, version = 3, exportSchema = false)
 public abstract class LocalDatabase extends RoomDatabase {
 
     public abstract ProductDao productDao();
-//    public abstract CartDao cartDao();
+    public abstract CartDao cartDao();
 
     private static volatile LocalDatabase INSTANCE;
     private static final int NUMBER_OF_THREADS = 4;
@@ -32,26 +32,20 @@ public abstract class LocalDatabase extends RoomDatabase {
     public static final ExecutorService databaseWriteExecutor =
             Executors.newFixedThreadPool(NUMBER_OF_THREADS);
 
-//    public static final Migration MIGRATION_1_2 = new Migration(1,2) {
-//        @Override
-//        public void migrate(@NonNull SupportSQLiteDatabase database) {
-//            database.execSQL("CREATE TABLE IF NOT EXISTS Cart (id INTEGER, idProduct INTEGER,price INTEGER, qty INTEGER,nameProduct TEXT, image TEXT)");
-//        }
-//    };
-//
-//    public static final Migration MIGRATION_1_3 = new Migration(1,3) {
-//        @Override
-//        public void migrate(@NonNull SupportSQLiteDatabase database) {
-//            database.execSQL("DROP TABLE Cart");
-//        }
-//    };
-//
-//    public static final Migration MIGRATION_1_4 = new Migration(1,4) {
-//        @Override
-//        public void migrate(@NonNull SupportSQLiteDatabase database) {
-//            database.execSQL("CREATE TABLE IF NOT EXISTS Cart (id INTEGER, idProduct INTEGER,price INTEGER, qty INTEGER,nameProduct TEXT, image TEXT)");
-//        }
-//    };
+    public static final Migration MIGRATION_1_2 = new Migration(1, 2) {
+        @Override
+        public void migrate(@NonNull SupportSQLiteDatabase database) {
+            database.execSQL("CREATE TABLE IF NOT EXISTS Cart (id INTEGER  NOT NULL, idProduct INTEGER NOT NULL," +
+                    "price INTEGER NOT NULL, qty INTEGER NOT NULL, nameProduct TEXT NOT NULL, image TEXT NOT NULL, PRIMARY KEY(id))");
+        }
+    };
+
+    public static final Migration MIGRATION_2_3 = new Migration(2,3) {
+        @Override
+        public void migrate(@NonNull SupportSQLiteDatabase database) {
+            database.execSQL("ALTER TABLE Cart ADD COLUMN realPrice INTEGER NOT NULL DEFAULT 0");
+        }
+    };
 
     public static LocalDatabase getDatabase(Context context) {
         if (INSTANCE == null) {
@@ -59,6 +53,7 @@ public abstract class LocalDatabase extends RoomDatabase {
                 if (INSTANCE == null) {
                     INSTANCE = Room.databaseBuilder(context.getApplicationContext(),
                             LocalDatabase.class, "yourcashier_database")
+                            .addMigrations(MIGRATION_1_2, MIGRATION_2_3)
                             .build();
                 }
             }

app/src/main/java/com/example/yourcashiertest/entities/Cart.java

@@ -35,6 +35,10 @@ public class Cart implements Parcelable {
     @ColumnInfo(name = "image")
     String image;
 
+    @NonNull
+    @ColumnInfo(name = "realPrice")
+    long realPrice = 0;
+
     protected Cart(Parcel in) {
         id = in.readLong();
         idProduct = in.readLong();
@@ -42,6 +46,7 @@ public class Cart implements Parcelable {
         image = in.readString();
         price = in.readLong();
         qty = in.readLong();
+        price = in.readLong();
     }
 
     public static final Creator<Cart> CREATOR = new Creator<Cart>() {
@@ -56,12 +61,13 @@ public class Cart implements Parcelable {
         }
     };
 
-    public Cart(long idProduct, String nameProduct, String image, long price, long qty){
+    public Cart(long idProduct, String nameProduct, String image, long price, long qty, long realPrice){
         this.idProduct = idProduct;
         this.nameProduct = nameProduct;
         this.image = image;
         this.price = price;
         this.qty = qty;
+        this.realPrice = realPrice;
     }
 
     public long getId() {
@@ -112,6 +118,14 @@ public class Cart implements Parcelable {
         this.qty = qty;
     }
 
+    public Long getRealPrice() {
+        return realPrice;
+    }
+
+    public void setRealPrice(Long realPrice) {
+        this.realPrice = realPrice;
+    }
+
     @Override
     public int describeContents() {
         return 0;
@@ -125,5 +139,6 @@ public class Cart implements Parcelable {
         dest.writeString(image);
         dest.writeLong(price);
         dest.writeLong(qty);
+        dest.writeLong(realPrice);
     }
 }

app/src/main/java/com/example/yourcashiertest/repositories/CartRepository.java

@@ -16,7 +16,7 @@ public class CartRepository {
 
     public CartRepository(Application application){
         LocalDatabase db = LocalDatabase.getDatabase(application);
-//        cartDao = db.cartDao();
+        cartDao = db.cartDao();
         carts = cartDao.getCarts();
     }
 

app/src/main/res/layout/cart_item.xml

@@ -7,14 +7,19 @@
         <variable
             name="cartProduct"
             type="com.example.yourcashiertest.entities.Cart" />
+
         <variable
             name="qty"
             type="String" />
 
+        <variable
+            name="price"
+            type="String" />
+
     </data>
     <com.google.android.material.card.MaterialCardView
         android:layout_width="match_parent"
-        android:layout_height="match_parent">
+        android:layout_height="wrap_content">
 
         <androidx.constraintlayout.widget.ConstraintLayout
             android:layout_width="match_parent"
@@ -27,6 +32,7 @@
                 android:id="@+id/imageView"
                 android:layout_width="107dp"
                 android:layout_height="110dp"
+                app:file="@{cartProduct.image}"
                 app:layout_constraintBottom_toBottomOf="parent"
                 app:layout_constraintEnd_toEndOf="parent"
                 app:layout_constraintHorizontal_bias="0.003"
@@ -42,7 +48,7 @@
                 android:layout_alignParentLeft="true"
                 android:layout_alignParentTop="true"
                 android:gravity="top"
-                android:text="@string/burger_medi"
+                android:text="@{cartProduct.nameProduct}"
                 android:textAppearance="@style/burger_medi"
                 app:layout_constraintBottom_toBottomOf="@+id/imageView"
                 app:layout_constraintEnd_toEndOf="parent"
@@ -59,7 +65,7 @@
                 android:layout_alignParentTop="true"
                 android:gravity="top"
                 android:text=""
-                tools:text="$6000"
+                tools:text="@{price}"
                 android:textAppearance="@style/some_id"
                 app:layout_constraintBottom_toBottomOf="@+id/imageView"
                 app:layout_constraintEnd_toEndOf="parent"
@@ -109,8 +115,7 @@
                 android:id="@+id/tv_qty"
                 android:layout_width="10dp"
                 android:layout_height="wrap_content"
-                android:text="@{qty}"
-                tools:text="4"
+                android:text="@{cartProduct.qty + ``}"
                 app:layout_constraintBottom_toBottomOf="@+id/v_add"
                 app:layout_constraintEnd_toStartOf="@+id/btn_add"
                 app:layout_constraintStart_toEndOf="@+id/btn_min"