fixing bug login

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

@@ -14,6 +14,7 @@ import com.google.android.material.textfield.TextInputEditText;
 public class LoginActivity extends AppCompatActivity {
     TextInputEditText etUsername, etPassword;
     MaterialButton btnLogin;
+    public static final String DATA_LOGIN = "DATA_LOGIN";
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -27,10 +28,6 @@ public class LoginActivity extends AppCompatActivity {
         btnLogin.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View view) {
-                Intent intent = new Intent(LoginActivity.this, MainActivity.class);
-                intent.putExtra("username", etUsername.getText().toString());
-                startActivity(intent);
-                finish();
 
                 if(etUsername.getText().toString().length() == 0 || etPassword.getText().toString().length() == 0){
                     Toast.makeText(getApplicationContext(), "Please input Username and Password", Toast.LENGTH_SHORT).show();
@@ -39,8 +36,8 @@ public class LoginActivity extends AppCompatActivity {
                 }else if(etPassword.getText().toString().length() < 8) {
                     etPassword.setError("Password length cannot be less than 8 characters");
                 }else{
-                    finish();
-                    startActivity(intent);
+                    startActivity(new Intent(LoginActivity.this, MainActivity.class)
+                            .putExtra(DATA_LOGIN, etUsername.getText().toString()));
                 }
             }
         });

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

@@ -39,8 +39,9 @@ public class MainActivity extends AppCompatActivity {
 
         ProductAdapter adapter = new ProductAdapter();
         binding = DataBindingUtil.setContentView(this, R.layout.activity_main);
-//        GridLayoutManager grid = new GridLayoutManager(this, 2);
-//        binding.rvProducts.setLayoutManager(grid);
+
+        String name = getIntent().getStringExtra(LoginActivity.DATA_LOGIN);
+        binding.tvUser.setText(name);
         // settings menu
         binding.ivCart.setOnClickListener(view -> startActivity(new Intent(MainActivity.this, CartActivity.class)));
         binding.ivSettings.setOnClickListener(view -> {

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

+package com.example.yourcashiertest.daos;
+
+import androidx.room.Dao;
+@Dao
+public interface CartDao {
+}

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

@@ -10,6 +10,7 @@ import androidx.room.Room;
 import androidx.room.RoomDatabase;
 import androidx.sqlite.db.SupportSQLiteOpenHelper;
 
+import com.example.yourcashiertest.daos.CartDao;
 import com.example.yourcashiertest.daos.ProductDao;
 import com.example.yourcashiertest.entities.Product;
 

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

+package com.example.yourcashiertest.entities;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import androidx.room.Entity;
+import androidx.room.PrimaryKey;
+
+@Entity(tableName = "carts")
+public class Cart implements Parcelable {
+    @PrimaryKey(autoGenerate = true)
+    private long id;
+
+    Product item;
+    long amount;
+
+    public Cart(Product item, long amount){
+        this.item = item;
+        this.amount = amount;
+    }
+
+    protected Cart(Parcel in) {
+        id = in.readLong();
+        item = in.readParcelable(Product.class.getClassLoader());
+        amount = in.readLong();
+    }
+
+    public static final Creator<Cart> CREATOR = new Creator<Cart>() {
+        @Override
+        public Cart createFromParcel(Parcel in) {
+            return new Cart(in);
+        }
+
+        @Override
+        public Cart[] newArray(int size) {
+            return new Cart[size];
+        }
+    };
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public Product getItem() {
+        return item;
+    }
+
+    public void setItem(Product item) {
+        this.item = item;
+    }
+
+    public long getAmount() {
+        return amount;
+    }
+
+    public void setAmount(long amount) {
+        this.amount = amount;
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeLong(id);
+        dest.writeParcelable(item, flags);
+        dest.writeLong(amount);
+    }
+}

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

+package com.example.yourcashiertest.repositories;
+
+public class CartRepository {
+}

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

+package com.example.yourcashiertest.viewmodels;
+
+public class CartViewModel {
+}