Tengo una aplicación de Android con la barra de navegación inferior. En la Actividad principal tengo un botón flotante y cuando lo presiono, me gustaría abrir un Fragmento (¿u otra actividad?) que cubra toda la pantalla (la barra de navegación inferior y otro contenido estarán debajo de mi nuevo fragmento abierto) . Me gustaría agregar que este fragmento recién abierto se usará para agregar algún elemento y cuando el usuario complete todos los campos como nombre, peso, etc. y haga clic en "agregar", el fragmento debe cerrarse y deberíamos ver nuestra barra de navegación inferior con sus fragmentos.

¿Podrían darme la solución a mi problema? ¡Estaría agradecido por algún código que permita hacer esto!

Aquí están las partes más importantes de mi código:

actividad_principal.xml:

 <?xml version="1.0" encoding="utf-8"?> <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/container" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingTop="?attr/actionBarSize"> <com.google.android.material.bottomnavigation.BottomNavigationView android:id="@+id/nav_view" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_marginStart="0dp" android:layout_marginEnd="0dp" android:background="?android:attr/windowBackground" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:menu="@menu/bottom_nav_menu" /> <fragment android:id="@+id/nav_host_fragment_activity_main" android:name="androidx.navigation.fragment.NavHostFragment" android:layout_width="match_parent" android:layout_height="match_parent" app:defaultNavHost="true" app:layout_constraintBottom_toTopOf="@id/nav_view" app:layout_constraintHorizontal_bias="0.0" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_constraintVertical_bias="1.0" app:navGraph="@navigation/mobile_navigation" /> <com.google.android.material.floatingactionbutton.FloatingActionButton android:id="@+id/buttonAdd" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginEnd="16dp" android:layout_marginBottom="84dp" android:contentDescription="@string/add_button" android:src="@drawable/ic_add" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" /> </androidx.constraintlayout.widget.ConstraintLayout>

MainActivity.kt:

 package com.example.myapp import android.os.Bundle import android.view.View import com.google.android.material.bottomnavigation.BottomNavigationView import androidx.appcompat.app.AppCompatActivity import androidx.navigation.findNavController import androidx.navigation.ui.AppBarConfiguration import androidx.navigation.ui.setupActionBarWithNavController import androidx.navigation.ui.setupWithNavController import com.example.myapp.databinding.ActivityMainBinding import com.example.myapp.ui.AddProductFragment import com.google.android.material.snackbar.Snackbar class MainActivity : AppCompatActivity() { private lateinit var binding: ActivityMainBinding override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) binding = ActivityMainBinding.inflate(layoutInflater) setContentView(binding.root) val navView: BottomNavigationView = binding.navView val navController = findNavController(R.id.nav_host_fragment_activity_main) // Passing each menu ID as a set of Ids because each // menu should be considered as top level destinations. val appBarConfiguration = AppBarConfiguration(setOf( R.id.navigation_expiring, R.id.navigation_storages, R.id.navigation_notifications)) setupActionBarWithNavController(navController, appBarConfiguration) navView.setupWithNavController(navController) // floating button: val buttonAdd: View = findViewById(R.id.buttonAdd) buttonAdd.setOnClickListener { //navigate(R.id.action_login_to_registration) //view.findNavController().navigate(R.id.actionAddProduct) supportFragmentManager .beginTransaction().add(R.id.nav_host_fragment_activity_main, AddProductFragment()) .commit() } } }

fragment_storages.xml: (otros fragmentos que ya tengo son casi iguales)

 <?xml version="1.0" encoding="utf-8"?> <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:layout_width="match_parent" android:layout_height="match_parent" tools:context=".ui.storages.StoragesFragment"> <TextView android:id="@+id/text_dashboard" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginStart="8dp" android:layout_marginTop="8dp" android:layout_marginEnd="8dp" android:textAlignment="center" android:textSize="20sp" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" /> </androidx.constraintlayout.widget.ConstraintLayout>

StoragesFragment.kt: (otros fragmentos que ya tengo son casi iguales)

 package com.example.myapp.ui.storages import android.os.Bundle import android.view.LayoutInflater import android.view.View import android.view.ViewGroup import android.widget.TextView import androidx.fragment.app.Fragment import androidx.lifecycle.ViewModelProvider import com.example.myapp.databinding.FragmentStoragesBinding class StoragesFragment : Fragment() { private var _binding: FragmentStoragesBinding? = null // This property is only valid between onCreateView and // onDestroyView. private val binding get() = _binding!! override fun onCreateView( inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle? ): View { val dashboardViewModel = ViewModelProvider(this).get(StoragesViewModel::class.java) _binding = FragmentStoragesBinding.inflate(inflater, container, false) val root: View = binding.root val textView: TextView = binding.textDashboard dashboardViewModel.text.observe(viewLifecycleOwner) { textView.text = it } return root } override fun onDestroyView() { super.onDestroyView() _binding = null } }

fragmento_añadir_producto.xml:

 <?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".ui.AddProductFragment"> <!-- TODO: Update blank fragment layout --> <TextView android:layout_width="match_parent" android:layout_height="match_parent" android:text="Add Product Fragment" /> </androidx.constraintlayout.widget.ConstraintLayout>

AddProductFragment.kt:

 package com.example.myapp.ui import android.os.Bundle import androidx.fragment.app.Fragment import android.view.LayoutInflater import android.view.View import android.view.ViewGroup import com.example.myapp.R class AddProductFragment : Fragment() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) } override fun onCreateView( inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle? ): View? { // Inflate the layout for this fragment return inflater.inflate(R.layout.fragment_add_product, container, false) } }

bottom_nav_menu.xml:

 <?xml version="1.0" encoding="utf-8"?> <menu xmlns:android="http://schemas.android.com/apk/res/android"> <item android:id="@+id/navigation_expiring" android:icon="@drawable/ic_expiring" android:title="@string/title_expiring" /> <item android:id="@+id/navigation_storages" android:icon="@drawable/ic_storages" android:title="@string/title_storages" /> <item android:id="@+id/navigation_notifications" android:icon="@drawable/ic_notifications_black_24dp" android:title="@string/title_notifications" /> </menu>

navegación_móvil.xml:

 <?xml version="1.0" encoding="utf-8"?> <navigation 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/mobile_navigation" app:startDestination="@+id/navigation_expiring"> <fragment android:id="@+id/navigation_expiring" android:name="com.example.myapp.ui.expiring.ExpiringFragment" android:label="@string/title_expiring" tools:layout="@layout/fragment_expiring" > </fragment> <fragment android:id="@+id/navigation_storages" android:name="com.example.myapp.ui.storages.StoragesFragment" android:label="@string/title_storages" tools:layout="@layout/fragment_storages" /> <fragment android:id="@+id/navigation_notifications" android:name="com.example.myapp.ui.notifications.NotificationsFragment" android:label="@string/title_notifications" tools:layout="@layout/fragment_notifications" /> <fragment android:id="@+id/navigation_add_product" android:name="com.example.myapp.ui.AddProductFragment" android:label="Add product" tools:layout="@layout/fragment_notifications" /> </navigation>