Funcionando con productos y totales :3

app/proguard-rules.pro

@@ -6,7 +6,7 @@
 #   http://developer.android.com/guide/developing/tools/proguard.html
 
 # If your project uses WebView with JS, uncomment the following
-# and specify the fully qualified class name to the JavaScript interface
+# and specify the fully qualified class nombre to the JavaScript interface
 # class:
 #-keepclassmembers class fqcn.of.javascript.interface.for.webview {
 #   public *;
@@ -17,5 +17,5 @@
 #-keepattributes SourceFile,LineNumberTable
 
 # If you keep the line number information, uncomment this to
-# hide the original source file name.
+# hide the original source file nombre.
 #-renamesourcefileattribute SourceFile

app/src/main/AndroidManifest.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="xyz.danielcortes.androidsqlite">
+
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
@@ -8,15 +9,9 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
-        <activity
+        <activity android:name=".UpdateDeleteActivity" />
-            android:name=".UpdateDeleteActivity"
+        <activity android:name=".AddProductoActivity" />
-            android:label="Usuario" />
+        <activity android:name=".GetAllProductosActivity">
-        <activity
-            android:name=".AddUserActivity"
-            android:label="Ingresar Nombre y Hobby" />
-        <activity
-            android:name=".GetAllUsersActivity"
-            android:label="Usuarios">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />

app/src/main/java/xyz/danielcortes/androidsqlite/AddProductoActivity.java

@@ -2,7 +2,6 @@ package xyz.danielcortes.androidsqlite;
 
 import androidx.appcompat.app.AppCompatActivity;
 
-import android.content.Intent;
 import android.os.Bundle;
 import android.view.MenuItem;
 import android.view.View;
@@ -10,25 +9,28 @@ import android.widget.Button;
 import android.widget.EditText;
 import android.widget.Toast;
 
-public class AddUserActivity extends AppCompatActivity {
+public class AddProductoActivity extends AppCompatActivity {
     private DatabaseHelper databaseHelper;
 
     private Button grabarButton;
     private EditText nombreText;
-    private EditText hobbyText;
+    private EditText precioText;
+    private EditText cantidadText;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_add_user);
+        setContentView(R.layout.activity_add_producto);
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
         getSupportActionBar().setDisplayShowHomeEnabled(true);
+        getSupportActionBar().setTitle("Agregar Producto");
 
         databaseHelper = new DatabaseHelper(this);
 
         grabarButton = findViewById(R.id.grabarButton);
         nombreText = findViewById(R.id.nombreText);
-        hobbyText = findViewById(R.id.hobbyText);
+        cantidadText = findViewById(R.id.cantidadText);
+        precioText = findViewById(R.id.precioText);
 
         grabarButton.setOnClickListener(onSave());
     }
@@ -36,14 +38,13 @@ public class AddUserActivity extends AppCompatActivity {
     private View.OnClickListener onSave() {
         return new View.OnClickListener() {
             public void onClick(View v) {
-                databaseHelper.addUserDetail(
+                databaseHelper.addProducto(
                         nombreText.getText().toString(),
-                        hobbyText.getText().toString()
+                        Integer.valueOf(cantidadText.getText().toString()),
+                        Integer.valueOf(precioText.getText().toString())
                 );
-                nombreText.setText("");
-                hobbyText.setText("");
                 Toast.makeText(
-                        AddUserActivity.this,
+                        AddProductoActivity.this,
                         "Datos grabados!",
                         Toast.LENGTH_LONG
                 ).show();

app/src/main/java/xyz/danielcortes/androidsqlite/CustomAdapter.java

@@ -12,54 +12,60 @@ import java.util.List;
 public class CustomAdapter extends BaseAdapter {
 
     private Context context;
-    private List<User> users;
+    private List<Producto> productos;
 
-    public CustomAdapter(Context context, List<User> users) {
+    public CustomAdapter(Context context, List<Producto> productos) {
         this.context = context;
-        this.users = users;
+        this.productos = productos;
     }
 
-    public void changeList(List<User> users) {
+    public void changeList(List<Producto> productos) {
-        this.users = users;
+        this.productos = productos;
     }
 
     @Override
     public int getCount() {
-        return users.size();
+        return productos.size();
     }
 
     @Override
     public Object getItem(int i) {
-        return users.get(i);
+        return productos.get(i);
     }
 
     @Override
     public long getItemId(int i) {
-        return users.get(i).getId();
+        return productos.get(i).getId();
     }
 
     @Override
-    public View getView(int position, View view, ViewGroup parent) {
+    public View getView(int i, View view, ViewGroup parent) {
         ViewHolder viewHolder;
 
         if(view == null) {
             viewHolder = new ViewHolder();
             LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
             view = inflater.inflate(R.layout.list_view, null, true);
-            viewHolder.nameText = view.findViewById(R.id.nameText);
+            viewHolder.nombreText = view.findViewById(R.id.nombreText);
-            viewHolder.hobbyText = view.findViewById(R.id.hobbyText);
+            viewHolder.cantidadText = view.findViewById(R.id.cantidadText);
+            viewHolder.precioText = view.findViewById(R.id.precioText);
+            viewHolder.totalText = view.findViewById(R.id.totalText);
             view.setTag(viewHolder);
         }else{
             viewHolder = (ViewHolder)view.getTag();
         }
 
-        viewHolder.nameText.setText("Nombre: " + users.get(position).getName());
+        Producto producto = productos.get(i);
-        viewHolder.hobbyText.setText("Hobby: " + users.get(position).getHobby());
+
+        viewHolder.nombreText.setText("Nombre: " + producto.getNombre());
+        viewHolder.cantidadText.setText("Cantidad: " + producto.getCantidad());
+        viewHolder.precioText.setText("Precio: " + producto.getPrecio());
+        viewHolder.totalText.setText("Total: " + (producto.getPrecio() * producto.getCantidad()));
 
         return view;
     }
 
     private class ViewHolder {
-        protected TextView nameText, hobbyText;
+        protected TextView nombreText, cantidadText, precioText, totalText;
     }
 }

app/src/main/java/xyz/danielcortes/androidsqlite/DatabaseHelper.java

@@ -12,69 +12,81 @@ import java.util.List;
 
 public class DatabaseHelper extends SQLiteOpenHelper {
 
-    public static String DATABASE_NAME = "user_database";
-    private static final int DATABASE_VERSION = 1;
-    private static final String TABLE_USER = "users";
-    private static final String KEY_ID = "id";
-    private static final String KEY_FIRSTNAME = "name";
-    private static final String KEY_HOBBY = "hobby";
-
-    private static final String CREATE_TABLE_STUDENTS = "CREATE TABLE " + TABLE_USER + "(" + KEY_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " + KEY_FIRSTNAME + " TEXT, " + KEY_HOBBY + " TEXT );";
-
     public DatabaseHelper(Context context) {
-        super(context, DATABASE_NAME, null, DATABASE_VERSION);
+        super(context, "productos_db", null, 1);
-
-        Log.d("Database", CREATE_TABLE_STUDENTS);
     }
 
     @Override
     public void onCreate(SQLiteDatabase db) {
-        db.execSQL(CREATE_TABLE_STUDENTS);
+        String sql = new StringBuilder()
+                .append("create table producto (")
+                .append("id integer primary key autoincrement,")
+                .append("nombre text not null,")
+                .append("cantidad integer not null default 1,")
+                .append("precio integer not null default 1)")
+                .toString();
+        db.execSQL(sql);
     }
 
     @Override
     public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
-        db.execSQL("DROP TABLE IF EXISTS '" + TABLE_USER + "'");
+        db.execSQL("drop table if exists producto");
         onCreate(db);
     }
 
-    public boolean addUserDetail(String name, String hobby) {
+    public boolean addProducto(String nombre, int cantidad, int precio) {
         SQLiteDatabase db = this.getWritableDatabase();
         ContentValues values = new ContentValues();
-        values.put(KEY_FIRSTNAME, name);
+        values.put("nombre", nombre);
-        values.put(KEY_HOBBY, hobby);
+        values.put("cantidad", cantidad);
-        return db.insert(TABLE_USER, null, values) == 1;
+        values.put("precio", precio);
+        return db.insert("producto", null, values) == 1;
     }
 
-    public List<User> getAllUsers() {
+    public List<Producto> getAllProductos() {
-        List<User> users= new ArrayList<>();
+        List<Producto> productos = new ArrayList<>();
-        String selectQuery = "SELECT * FROM " + TABLE_USER;
+
+        String sql = "select * from producto";
         SQLiteDatabase db = this.getReadableDatabase();
-        Cursor cursor = db.rawQuery(selectQuery, null);
+        Cursor cursor = db.rawQuery(sql, null);
 
         if (cursor.moveToFirst()) {
             do {
-                User user = new User();
+                Producto producto = new Producto();
-                user.setId(cursor.getInt(cursor.getColumnIndex(KEY_ID)));
+                producto.setId(cursor.getInt(cursor.getColumnIndex("id")));
-                user.setName(cursor.getString(cursor.getColumnIndex(KEY_FIRSTNAME)));
+                producto.setNombre(cursor.getString(cursor.getColumnIndex("nombre")));
-                user.setHobby(cursor.getString(cursor.getColumnIndex(KEY_HOBBY)));
+                producto.setCantidad(cursor.getInt(cursor.getColumnIndex("cantidad")));
-                users.add(user);
+                producto.setPrecio(cursor.getInt(cursor.getColumnIndex("precio")));
+                productos.add(producto);
             } while (cursor.moveToNext());
         }
+
         cursor.close();
-        return users;
+        return productos;
     }
 
-    public int updateUser(int id, String name, String hobby) {
+    public long getTotal() {
+        String sql = "select sum(precio * cantidad) as total from producto";
+        SQLiteDatabase db = this.getReadableDatabase();
+        Cursor cursor = db.rawQuery(sql, null);
+        if(cursor.moveToFirst()) {
+            return cursor.getLong(cursor.getColumnIndex("total"));
+        }else{
+            return 0;
+        }
+    }
+
+    public int updateProducto(int id, String name, int cantidad, int precio) {
         SQLiteDatabase db = this.getWritableDatabase();
         ContentValues values = new ContentValues();
-        values.put(KEY_FIRSTNAME, name);
+        values.put("nombre", name);
-        values.put(KEY_HOBBY, hobby);
+        values.put("cantidad", cantidad);
-        return db.update(TABLE_USER, values, KEY_ID + " = ?", new String[]{String.valueOf(id)});
+        values.put("precio", precio);
+        return db.update("producto", values, "id = ?", new String[]{String.valueOf(id)});
     }
 
-    public void deleteUser(int id) {
+    public void deleteProducto(int id) {
         SQLiteDatabase db = this.getWritableDatabase();
-        db.delete(TABLE_USER, KEY_ID + " = ?", new String[]{String.valueOf(id)});
+        db.delete("producto", "id = ?", new String[]{String.valueOf(id)});
     }
 }

app/src/main/java/xyz/danielcortes/androidsqlite/GetAllProductosActivity.java

@@ -3,45 +3,46 @@ package xyz.danielcortes.androidsqlite;
 import android.content.Intent;
 import android.os.Bundle;
 
-import com.google.android.material.floatingactionbutton.FloatingActionButton;
-import com.google.android.material.snackbar.Snackbar;
-
 import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.widget.Toolbar;
 
-import android.util.Log;
 import android.view.View;
 import android.widget.AdapterView;
 import android.widget.Button;
+import android.widget.EditText;
 import android.widget.ListView;
+import android.widget.TextView;
 
 import java.util.List;
 
-public class GetAllUsersActivity extends AppCompatActivity {
+public class GetAllProductosActivity extends AppCompatActivity {
     private ListView listView;
     private Button agregarButton;
-    private List<User> users;
+    private TextView totalText;
+    private List<Producto> productos;
     private CustomAdapter customAdapter;
     private DatabaseHelper databaseHelper;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_get_all_users);
+        setContentView(R.layout.activity_get_all_productos);
+        getSupportActionBar().setTitle("Lista de compra");
 
         listView = findViewById(R.id.listView);
+        totalText = findViewById(R.id.totalText);
         agregarButton = findViewById(R.id.agregarButton);
 
         databaseHelper = new DatabaseHelper(this);
-        users = databaseHelper.getAllUsers();
+        productos = databaseHelper.getAllProductos();
-        customAdapter = new CustomAdapter(this, users);
+        customAdapter = new CustomAdapter(this, productos);
         listView.setAdapter(customAdapter);
+        totalText.setText("Total: " + databaseHelper.getTotal());
 
         listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
             @Override
             public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
-                Intent intent = new Intent(GetAllUsersActivity.this, UpdateDeleteActivity.class);
+                Intent intent = new Intent(GetAllProductosActivity.this, UpdateDeleteActivity.class);
-                intent.putExtra("user", users.get(position));
+                intent.putExtra("producto", productos.get(position));
                 startActivity(intent);
             }
         });
@@ -49,7 +50,7 @@ public class GetAllUsersActivity extends AppCompatActivity {
         agregarButton.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
-                Intent intent = new Intent(GetAllUsersActivity.this, AddUserActivity.class);
+                Intent intent = new Intent(GetAllProductosActivity.this, AddProductoActivity.class);
                 startActivity(intent);
             }
         });
@@ -58,8 +59,9 @@ public class GetAllUsersActivity extends AppCompatActivity {
     @Override
     protected void onResume() {
         super.onResume();
-        users = databaseHelper.getAllUsers();
+        productos = databaseHelper.getAllProductos();
-        customAdapter.changeList(users);
+        customAdapter.changeList(productos);
         customAdapter.notifyDataSetChanged();
+        totalText.setText("Total: " + databaseHelper.getTotal());
     }
 }

app/src/main/java/xyz/danielcortes/androidsqlite/Producto.java

@@ -0,0 +1,42 @@
+package xyz.danielcortes.androidsqlite;
+
+import java.io.Serializable;
+
+public class Producto implements Serializable {
+    private int id;
+    private String nombre;
+    private int cantidad;
+    private int precio;
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getNombre() {
+        return nombre;
+    }
+
+    public void setNombre(String nombre) {
+        this.nombre = nombre;
+    }
+
+    public int getCantidad() {
+        return cantidad;
+    }
+
+    public void setCantidad(int cantidad) {
+        this.cantidad = cantidad;
+    }
+
+    public int getPrecio() {
+        return precio;
+    }
+
+    public void setPrecio(int precio) {
+        this.precio = precio;
+    }
+}

app/src/main/java/xyz/danielcortes/androidsqlite/UpdateDeleteActivity.java

@@ -4,7 +4,6 @@ import androidx.appcompat.app.AppCompatActivity;
 
 import android.app.AlertDialog;
 import android.content.DialogInterface;
-import android.content.Intent;
 import android.os.Bundle;
 import android.view.MenuItem;
 import android.view.View;
@@ -13,9 +12,11 @@ import android.widget.EditText;
 import android.widget.Toast;
 
 public class UpdateDeleteActivity extends AppCompatActivity {
-    private User user;
+    private Producto producto;
     private EditText nombreText;
-    private EditText hobbyText;
+    private EditText precioText;
+    private EditText cantidadText;
+
     private Button updateButton;
     private Button deleteButton;
 
@@ -27,17 +28,21 @@ public class UpdateDeleteActivity extends AppCompatActivity {
         setContentView(R.layout.activity_update_delete);
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
         getSupportActionBar().setDisplayShowHomeEnabled(true);
+        getSupportActionBar().setTitle("Modificar Producto");
 
-        user = (User) getIntent().getSerializableExtra("user");
+        producto = (Producto) getIntent().getSerializableExtra("producto");
         databaseHelper = new DatabaseHelper(this);
 
-        nombreText = findViewById(R.id.nameText);
+        nombreText = findViewById(R.id.nombreText);
-        hobbyText = findViewById(R.id.hobbyText);
+        precioText = findViewById(R.id.precioText);
+        cantidadText = findViewById(R.id.cantidadText);
+
         updateButton = findViewById(R.id.updateButton);
         deleteButton = findViewById(R.id.deleteButton);
 
-        nombreText.setText(user.getName());
+        nombreText.setText(producto.getNombre());
-        hobbyText.setText(user.getHobby());
+        precioText.setText(String.valueOf(producto.getPrecio()));
+        cantidadText.setText(String.valueOf(producto.getCantidad()));
 
         updateButton.setOnClickListener(onUpdate());
         deleteButton.setOnClickListener(onDelete());
@@ -52,7 +57,7 @@ public class UpdateDeleteActivity extends AppCompatActivity {
                         .setPositiveButton("Si", new DialogInterface.OnClickListener() {
                             @Override
                             public void onClick(DialogInterface dialog, int which) {
-                                databaseHelper.deleteUser(user.getId());
+                                databaseHelper.deleteProducto(producto.getId());
                                 Toast.makeText(
                                         UpdateDeleteActivity.this,
                                         "Usuario eliminado correctamente",
@@ -72,8 +77,9 @@ public class UpdateDeleteActivity extends AppCompatActivity {
         return new View.OnClickListener() {
             @Override
             public void onClick(View v) {
-                if (user.getName().equals(nombreText.getText().toString()) &&
+                if (producto.getNombre().equals(nombreText.getText().toString()) &&
-                        user.getHobby().equals(hobbyText.getText().toString())
+                        String.valueOf(producto.getPrecio()).equals(precioText.getText().toString()) &&
+                        String.valueOf(producto.getCantidad()).equals(cantidadText.getText().toString())
                 ) {
                     Toast.makeText(
                             UpdateDeleteActivity.this,
@@ -83,21 +89,19 @@ public class UpdateDeleteActivity extends AppCompatActivity {
                     return;
                 }
 
-                databaseHelper.updateUser(
+                databaseHelper.updateProducto(
-                        user.getId(),
+                        producto.getId(),
                         nombreText.getText().toString(),
-                        hobbyText.getText().toString()
+                        Integer.valueOf(cantidadText.getText().toString()),
+                        Integer.valueOf(precioText.getText().toString())
                 );
                 Toast.makeText(
                         UpdateDeleteActivity.this,
-                        "ACTUALIZACIÓN EXITOSA!",
+                        "Actualización realizada!",
                         Toast.LENGTH_LONG
                 ).show();
 
-                Intent intent = new Intent(UpdateDeleteActivity.this, AddUserActivity.class);
+                finish();
-                intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
-
-                startActivity(intent);
             }
         };
     }

app/src/main/java/xyz/danielcortes/androidsqlite/User.java

@@ -1,34 +0,0 @@
-package xyz.danielcortes.androidsqlite;
-
-import java.io.Serializable;
-
-public class User implements Serializable {
-    private int id;
-    private String name;
-    private String hobby;
-
-
-    public int getId() {
-        return id;
-    }
-
-    public void setId(int id) {
-        this.id = id;
-    }
-
-    public String getName() {
-        return name;
-    }
-
-    public void setName(String name) {
-        this.name = name;
-    }
-
-    public String getHobby() {
-        return hobby;
-    }
-
-    public void setHobby(String hobby) {
-        this.hobby = hobby;
-    }
-}

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

@@ -4,7 +4,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".AddUserActivity">
+    tools:context=".AddProductoActivity">
 
     <EditText
         android:id="@+id/nombreText"
@@ -15,25 +15,39 @@
         android:layout_marginEnd="16dp"
         android:ems="10"
         android:hint="Nombre"
-        android:inputType="none"
+        android:inputType="text"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
     <EditText
-        android:id="@+id/hobbyText"
+        android:id="@+id/precioText"
         android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:layout_marginStart="16dp"
         android:layout_marginTop="16dp"
         android:layout_marginEnd="16dp"
         android:ems="10"
-        android:hint="Hobby"
+        android:hint="Precio"
-        android:inputType="none"
+        android:inputType="numberSigned|number"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@+id/nombreText" />
 
+    <EditText
+        android:id="@+id/cantidadText"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="16dp"
+        android:layout_marginTop="16dp"
+        android:layout_marginEnd="16dp"
+        android:ems="10"
+        android:hint="Cantidad"
+        android:inputType="numberSigned|number"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/precioText" />
+
     <Button
         android:id="@+id/grabarButton"
         style="@android:style/Widget.Material.Button.Colored"
@@ -44,7 +58,8 @@
         android:layout_marginEnd="16dp"
         android:text="Grabar"
         app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.0"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/hobbyText" />
+        app:layout_constraintTop_toBottomOf="@+id/cantidadText" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -2,10 +2,9 @@
 <androidx.constraintlayout.widget.ConstraintLayout 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:id="@+id/linearLayout2"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".GetAllUsersActivity">
+    tools:context=".GetAllProductosActivity">
 
     <ListView
         android:id="@+id/listView"
@@ -15,8 +14,9 @@
         android:layout_marginTop="16dp"
         android:layout_marginEnd="16dp"
         android:layout_marginBottom="16dp"
-        app:layout_constraintBottom_toTopOf="@+id/agregarButton"
+        app:layout_constraintBottom_toTopOf="@+id/totalText"
         app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.0"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent">
 
@@ -32,6 +32,18 @@
         android:text="Agregar"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="1.0"
+        app:layout_constraintStart_toStartOf="parent" />
+
+    <TextView
+        android:id="@+id/totalText"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="16dp"
+        android:layout_marginEnd="16dp"
+        android:layout_marginBottom="16dp"
+        app:layout_constraintBottom_toTopOf="@+id/agregarButton"
+        app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -7,28 +7,44 @@
     tools:context=".UpdateDeleteActivity">
 
     <EditText
-        android:id="@+id/nameText"
+        android:id="@+id/nombreText"
         android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:layout_marginStart="16dp"
         android:layout_marginTop="16dp"
         android:layout_marginEnd="16dp"
         android:hint="Nombre"
+        android:inputType="text"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
     <EditText
-        android:id="@+id/hobbyText"
+        android:id="@+id/precioText"
         android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:layout_marginStart="16dp"
         android:layout_marginTop="16dp"
         android:layout_marginEnd="16dp"
-        android:hint="Hobby"
+        android:hint="Precio"
+        android:inputType="numberSigned|number"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/nameText" />
+        app:layout_constraintTop_toBottomOf="@+id/nombreText" />
+
+    <EditText
+        android:id="@+id/cantidadText"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="16dp"
+        android:layout_marginTop="16dp"
+        android:layout_marginEnd="16dp"
+        android:hint="Cantidad"
+        android:inputType="numberSigned"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.0"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/precioText" />
 
     <Button
         android:id="@+id/updateButton"
@@ -39,18 +55,20 @@
         android:layout_marginEnd="16dp"
         android:text="Actualizar"
         app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.0"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/hobbyText" />
+        app:layout_constraintTop_toBottomOf="@+id/cantidadText" />
 
     <Button
         android:id="@+id/deleteButton"
         android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:layout_marginStart="16dp"
-        android:layout_marginTop="16dp"
+        android:layout_marginTop="12dp"
         android:layout_marginEnd="16dp"
         android:text="Borrar"
         app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.0"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@+id/updateButton" />
 

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

@@ -2,35 +2,56 @@
 <androidx.constraintlayout.widget.ConstraintLayout 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:id="@+id/linearLayout"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
     <TextView
-        android:id="@+id/nameText"
+        android:id="@+id/nombreText"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_marginStart="16dp"
         android:layout_marginTop="16dp"
         android:layout_marginEnd="16dp"
-        android:text="TextView"
         android:textAppearance="@style/TextAppearance.AppCompat.Medium"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
     <TextView
-        android:id="@+id/hobbyText"
+        android:id="@+id/precioText"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_marginStart="16dp"
         android:layout_marginTop="16dp"
         android:layout_marginEnd="16dp"
-        android:layout_marginBottom="16dp"
-        android:text="TextView"
         android:textAppearance="@style/TextAppearance.AppCompat.Medium"
-        app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/nameText" />
+        app:layout_constraintTop_toBottomOf="@+id/nombreText" />
+
+    <TextView
+        android:id="@+id/cantidadText"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="16dp"
+        android:layout_marginTop="16dp"
+        android:layout_marginEnd="16dp"
+        android:textAppearance="@style/TextAppearance.AppCompat.Medium"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/precioText" />
+
+    <TextView
+        android:id="@+id/totalText"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="16dp"
+        android:layout_marginTop="16dp"
+        android:layout_marginEnd="16dp"
+        android:textAppearance="@style/TextAppearance.AppCompat.Medium"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.0"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/cantidadText" />
+
 </androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/values/strings.xml

@@ -1,3 +1,3 @@
 <resources>
-    <string name="app_name">AndroidSQLite</string>
+    <string name="app_name">Lista de Compra</string>
 </resources>

gradle.properties

@@ -1,5 +1,5 @@
 # Project-wide Gradle settings.
-# IDE (e.g. Android Studio) users:
+# IDE (e.g. Android Studio) productos:
 # Gradle settings configured through the IDE *will override*
 # any settings specified in this file.
 # For more details on how to configure your build environment visit

gradlew

@@ -106,7 +106,7 @@ fi
 
 # For Darwin, add options to specify how the application appears in the dock
 if $darwin; then
-    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:nombre=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
 fi
 
 # For Cygwin, switch paths to Windows format before running java
@@ -123,7 +123,7 @@ if $cygwin ; then
         SEP="|"
     done
     OURCYGPATTERN="(^($ROOTDIRS))"
-    # Add a user-defined pattern to the cygpath arguments
+    # Add a producto-defined pattern to the cygpath arguments
     if [ "$GRADLE_CYGPATTERN" != "" ] ; then
         OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
     fi