add fitur payment

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.utils.Convert;
 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;
     CartAdapter adapter;
+    private static int SUM = 0;
+    public static String PRICE = "price";
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -37,35 +34,32 @@ public class CartActivity extends AppCompatActivity {
         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;
+        cartViewModel.getCarts().observe(this, carts -> {
+            int count = 0;
+            if (carts.size() != 0){
                 for (int i = 0; i < carts.size(); i++){
-                    sum += carts.get(i).getPrice();
+                    count += carts.get(i).getPrice();
                 }
-                binding.tvTotalPrice.setText(String.valueOf(sum));
             }
+            SUM = count;
+            binding.tvTotalPrice.setText(Convert.changeToCurrency(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()));
+                cart.setPrice(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){
+                cart.setPrice(cart.getRealPrice() * cart.getQty());
+                cartViewModel.updateCart(cart);
+                if (cart.getQty() <= 0){
                     cartViewModel.deleteCart(cart);
-                }else {
-                    cart.setPrice(Math.multiplyExact(cart.getRealPrice(), cart.getQty()));
-                    cartViewModel.updateCart(cart);
                 }
             }
         });
@@ -74,23 +68,15 @@ public class CartActivity extends AppCompatActivity {
 
         binding.ivBtnBack.setOnClickListener(view -> startActivity(new Intent(CartActivity.this, MainActivity.class)));
         binding.btnCheckout.setOnClickListener(view -> {
-            startActivity(new Intent(CartActivity.this, PaymentActivity.class));
+            startActivity(new Intent(CartActivity.this, PaymentActivity.class).putExtra(PRICE, SUM));
             finish();
         });
     }
 
-
-    private String changeToCurrency(int totalPrice){
-        DecimalFormat decimalFormat = (DecimalFormat) DecimalFormat.getCurrencyInstance();
-
-        DecimalFormatSymbols formatSymbols = new DecimalFormatSymbols();
-        formatSymbols.setCurrencySymbol("Rp. ");
-        formatSymbols.setMonetaryDecimalSeparator(',');
-        formatSymbols.setGroupingSeparator('.');
-
-        String priceRupiah = decimalFormat.format(totalPrice);
-
-        return priceRupiah;
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        binding = null;
     }
 
 }
\ No newline at end of file

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

@@ -3,7 +3,6 @@ package com.example.yourcashiertest.activities;
 import androidx.annotation.NonNull;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.databinding.DataBindingUtil;
-import androidx.lifecycle.Observer;
 import androidx.lifecycle.ViewModelProvider;
 
 import android.Manifest;
@@ -12,8 +11,6 @@ import android.content.Intent;
 import android.os.Bundle;
 import android.text.Editable;
 import android.text.TextWatcher;
-import android.view.Menu;
-import android.view.View;
 import android.widget.PopupMenu;
 import android.widget.Toast;
 
@@ -22,12 +19,9 @@ 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;
 import com.example.yourcashiertest.viewmodels.ProductViewModel;
 
-import java.util.ArrayList;
-import java.util.List;
 
 public class MainActivity extends AppCompatActivity {
 
@@ -41,6 +35,7 @@ public class MainActivity extends AppCompatActivity {
             Manifest.permission.WRITE_EXTERNAL_STORAGE};
 
     public static boolean visibility = false;
+    ProductViewModel viewModel;
     CartViewModel cartViewModel;
 
     @Override
@@ -92,7 +87,7 @@ public class MainActivity extends AppCompatActivity {
         });
 
         binding.rvProducts.setAdapter(adapter);
-        ProductViewModel viewModel = new ViewModelProvider(this).get(ProductViewModel.class);
+        viewModel = new ViewModelProvider(this).get(ProductViewModel.class);
         viewModel.getProducts().observe(this, adapter::setProducts);
 
         adapter.setListener(new ProductAdapter.ProductListener() {
@@ -134,6 +129,8 @@ public class MainActivity extends AppCompatActivity {
 
 
     public void addToCart(Product product){
+        product.setQuantity(product.getQuantity() - 1);
+        viewModel.updateProduct(product);
         Cart cart = new Cart(0,"", "", 0, 0, 0);
         cart.setIdProduct(product.getId());
         cart.setImage(product.getPhoto());
@@ -142,7 +139,7 @@ public class MainActivity extends AppCompatActivity {
         cart.setQty(1);
         cart.setRealPrice(product.getPrice());
         cartViewModel.insertCart(cart);
-        Toast.makeText(MainActivity.this, "Data berhasil ditambahkan ke keranjang", Toast.LENGTH_LONG).show();
+        Toast.makeText(MainActivity.this, "Produk berhasil ditambahkan ke keranjang", Toast.LENGTH_LONG).show();
     }
 
 

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

 package com.example.yourcashiertest.activities;
 
+import androidx.annotation.RequiresApi;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.cardview.widget.CardView;
+import androidx.databinding.DataBindingUtil;
+import androidx.lifecycle.ViewModelProvider;
 
 import android.content.Intent;
+import android.os.Build;
 import android.os.Bundle;
+import android.util.Log;
 import android.view.View;
 
 import com.example.yourcashiertest.R;
+import com.example.yourcashiertest.databinding.ActivityPaymentBinding;
+import com.example.yourcashiertest.utils.Convert;
+import com.example.yourcashiertest.viewmodels.CartViewModel;
 
 public class PaymentActivity extends AppCompatActivity {
+
+    ActivityPaymentBinding binding;
+    public static String REFUND = "refund";
+    public int refund;
+    public int amount;
+    CartViewModel cartViewModel;
+
+    @RequiresApi(api = Build.VERSION_CODES.N)
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_payment);
+        binding = DataBindingUtil.setContentView(this, R.layout.activity_payment);
+
+        cartViewModel = new ViewModelProvider(this).get(CartViewModel.class);
+
+        amount = getIntent().getIntExtra(CartActivity.PRICE, 0);
+        binding.setAmount(Convert.changeToCurrency(amount));
 
     }
 
     public void btnPay(View view) {
-        startActivity(new Intent(PaymentActivity.this, StatusPayment.class));
+        int amountPaid = Integer.parseInt(binding.etAmountPaid.getText().toString());
+        refund = amountPaid - amount;
+        startActivity(new Intent(PaymentActivity.this, StatusPayment.class).putExtra(REFUND, refund));
+        cartViewModel.clear();
         finish();
     }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        binding = null;
+    }
 }
\ No newline at end of file

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

 package com.example.yourcashiertest.activities;
 
 import androidx.appcompat.app.AppCompatActivity;
+import androidx.databinding.DataBindingUtil;
 
 import android.content.Intent;
 import android.os.Bundle;
+import android.util.Log;
 import android.view.View;
 
 import com.example.yourcashiertest.R;
+import com.example.yourcashiertest.databinding.ActivityStatusPaymentBinding;
+import com.example.yourcashiertest.utils.Convert;
 
 public class StatusPayment extends AppCompatActivity {
 
+    ActivityStatusPaymentBinding binding;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_status_payment);
+        binding = DataBindingUtil.setContentView(this, R.layout.activity_status_payment);
+
+        int refund = getIntent().getIntExtra(PaymentActivity.REFUND, 0);
+        Log.d("Tag", String.valueOf(refund));
+        binding.setRefund(Convert.changeToCurrency(refund));
     }
 
     public void btnFinish(View view) {
         startActivity(new Intent(StatusPayment.this, MainActivity.class));
         finish();
     }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        binding = null;
+    }
 }
\ No newline at end of file

app/src/main/java/com/example/yourcashiertest/daos/CartDao.java

@@ -25,4 +25,7 @@ public interface CartDao {
 
     @Delete
     public void deleteCart(Cart cart);
+
+    @Query("DELETE FROM Cart")
+    public void deletAll();
 }

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

@@ -32,6 +32,10 @@ public class CartRepository {
         LocalDatabase.databaseWriteExecutor.execute(() -> cartDao.deleteCart(cart));
     }
 
+    public void clear(){
+        LocalDatabase.databaseWriteExecutor.execute(() -> cartDao.deletAll());
+    }
+
     public LiveData<List<Cart>> getAllCart(){
         return this.carts;
     }

app/src/main/java/com/example/yourcashiertest/utils/Convert.java

+package com.example.yourcashiertest.utils;
+
+import java.text.DecimalFormat;
+import java.text.DecimalFormatSymbols;
+
+public class Convert {
+    public static String changeToCurrency(long totalPrice){
+        DecimalFormat decimalFormat = (DecimalFormat) DecimalFormat.getCurrencyInstance();
+
+        DecimalFormatSymbols formatSymbols = new DecimalFormatSymbols();
+        formatSymbols.setCurrencySymbol("Rp. ");
+        formatSymbols.setMonetaryDecimalSeparator(',');
+        formatSymbols.setGroupingSeparator('.');
+
+        String priceRupiah = decimalFormat.format(totalPrice);
+
+        return priceRupiah;
+    }
+}

app/src/main/java/com/example/yourcashiertest/viewmodels/CartViewModel.java

@@ -40,6 +40,10 @@ public class CartViewModel extends AndroidViewModel {
         repository.delete(cart);
     }
 
+    public void clear(){
+        repository.clear();
+    }
+
     public MutableLiveData<Cart> getCart(){
         return this.cart;
     }

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

@@ -79,7 +79,6 @@
             android:layout_height="20dp"
             android:gravity="top"
             android:textColor="#fff"
-            android:text=""
             android:textAppearance="@style/some_id"
             app:layout_constraintBottom_toBottomOf="@+id/amount"
             app:layout_constraintEnd_toEndOf="@+id/amount"

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

 <?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:padding="10dp"
-    tools:context=".activities.StatusPayment">
+    xmlns:tools="http://schemas.android.com/tools">
 
-    <TextView
-        android:id="@+id/tvPaymentStatus"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginTop="16dp"
-        android:gravity="top"
-        android:text="@string/payment_status"
-        android:textAppearance="@style/payment"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="0.072"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
+    <data>
+        <variable
+            name="refund"
+            type="String" />
+    </data>
 
-    <ImageView
-        android:id="@+id/icConfirmed"
-        android:layout_width="150dp"
-        android:layout_height="130dp"
-        android:src="@drawable/confirmed"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/tvPaymentStatus"
-        android:layout_marginTop="40dp"
-        tools:layout_editor_absoluteX="140dp"
-        tools:layout_editor_absoluteY="29dp" />
-
-    <TextView
-        android:id="@+id/tvPaymentSuccess"
+    <androidx.constraintlayout.widget.ConstraintLayout
         android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:layout_marginTop="20dp"
-        android:textSize="24dp"
-        android:gravity="center"
-        android:text="@string/payment_by_cash_was_successful"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="0.0"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/icConfirmed" />
+        android:layout_height="match_parent"
+        android:padding="10dp"
+        tools:context=".activities.StatusPayment">
 
-    <TextView
-        android:id="@+id/tvRefund"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:layout_marginTop="64dp"
-        android:gravity="center"
-        android:text="@string/refund"
-        android:textSize="35dp"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="0.0"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/tvPaymentSuccess" />
+        <TextView
+            android:id="@+id/tvPaymentStatus"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:gravity="top"
+            android:text="@string/payment_status"
+            android:textAppearance="@style/payment"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintHorizontal_bias="0.072"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent" />
 
-    <TextView
-        android:id="@+id/tvNominalRefund"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:layout_marginTop="28dp"
-        android:gravity="center"
-        android:text="Rp. 44000"
-        android:textSize="45dp"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="0.0"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/tvRefund" />
+        <ImageView
+            android:id="@+id/icConfirmed"
+            android:layout_width="150dp"
+            android:layout_height="130dp"
+            android:src="@drawable/confirmed"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/tvPaymentStatus"
+            android:layout_marginTop="40dp"
+            tools:layout_editor_absoluteX="140dp"
+            tools:layout_editor_absoluteY="29dp" />
 
-    <com.google.android.material.button.MaterialButton
-        android:id="@+id/btnFinish"
-        android:onClick="btnFinish"
-        android:layout_width="match_parent"
-        android:layout_height="60dp"
-        android:text="FINISH"
-        android:textSize="20dp"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="0.0"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/tvNominalRefund"
-        app:layout_constraintVertical_bias="1.0" />
+        <TextView
+            android:id="@+id/tvPaymentSuccess"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="20dp"
+            android:textSize="24dp"
+            android:gravity="center"
+            android:text="@string/payment_by_cash_was_successful"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintHorizontal_bias="0.0"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/icConfirmed" />
+
+        <TextView
+            android:id="@+id/tvRefund"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="64dp"
+            android:gravity="center"
+            android:text="@string/refund"
+            android:textSize="35dp"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintHorizontal_bias="0.0"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/tvPaymentSuccess" />
+
+        <TextView
+            android:id="@+id/tvNominalRefund"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="28dp"
+            android:gravity="center"
+            android:text="@{refund}"
+            android:textSize="45dp"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintHorizontal_bias="0.0"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/tvRefund" />
+
+        <com.google.android.material.button.MaterialButton
+            android:id="@+id/btnFinish"
+            android:onClick="btnFinish"
+            android:layout_width="match_parent"
+            android:layout_height="60dp"
+            android:text="FINISH"
+            android:textSize="20dp"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintHorizontal_bias="0.0"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@+id/tvNominalRefund"
+            app:layout_constraintVertical_bias="1.0" />
 
-</androidx.constraintlayout.widget.ConstraintLayout>
+    </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
+</layout>
\ No newline at end of file