На одном из моих фрагментов у меня есть CardView, куда я хочу добавить несколько дочерних представлений на основе файла макета.Количество добавляемых дочерних представлений будет зависеть от того, сколько элементов содержится в объекте List (поэтому я использую цикл for для итерации по списку).Когда я добавляю представление к просмотру карты, приложение вылетает с ошибкой, говорящей о необходимости удалить дочерние представления перед добавлением другого представления.
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto">
<data>
<import type="com.mahaprasad.mahaprasad.models.DeliveryMethod" />
<import type="android.view.View" />
<variable
name="viewModel"
type="com.mahaprasad.mahaprasad.screens.checkoutflow.CheckoutSharedViewModel" />
</data>
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.core.widget.NestedScrollView
android:id="@+id/nested_scroll_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="50dp">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<com.google.android.material.card.MaterialCardView
android:id="@+id/basket_products_card"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="16dp">
<!-- Layout Child Views Should go here -->
</com.google.android.material.card.MaterialCardView>
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.core.widget.NestedScrollView>
<com.google.android.material.button.MaterialButton
android:id="@+id/checkout_button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom|start"
android:insetBottom="0dp"
android:text="Place Order"
android:textAlignment="viewStart"
app:backgroundTint="@color/green_button_colour"
app:cornerRadius="0dp" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>
</layout>
Layout template
<?xml version="1.0" encoding="utf-8"?>
<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">
<data>
<variable
name="product"
type="com.mahaprasad.mahaprasad.models.Product" />
</data>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="8dp">
<androidx.appcompat.widget.AppCompatImageView
android:id="@+id/product_image"
android:layout_width="90dp"
android:layout_height="90dp"
android:maxWidth="100dp"
android:maxHeight="100dp"
android:src="@drawable/chedvo"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintStart_toStartOf="parent"
tools:layout_editor_absoluteX="50dp" />
<androidx.appcompat.widget.AppCompatTextView
android:id="@+id/product_name_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="5dp"
android:layout_marginTop="5dp"
android:maxWidth="300dp"
android:textSize="18sp"
android:textColor="@color/colourBlack"
android:autoSizeMaxTextSize="18sp"
android:autoSizeMinTextSize="14sp"
android:autoSizeStepGranularity="1sp"
android:autoSizeTextType="uniform"
android:maxLines="1"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintStart_toEndOf="@id/product_image"
app:layout_constraintBottom_toTopOf="@id/product_size_text"
app:productName="@{product}"
app:autoSizeMaxTextSize="18sp"
app:autoSizeMinTextSize="14sp"
app:autoSizeStepGranularity="2sp"
tools:text="Chedvo (Farari Chedvoooooo)"
tools:targetApi="o" />
<androidx.appcompat.widget.AppCompatTextView
android:id="@+id/product_size_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="5dp"
android:textSize="15sp"
app:layout_constraintTop_toBottomOf="@id/product_name_text"
app:layout_constraintStart_toEndOf="@id/product_image"
app:productSize="@{product}"
tools:text="6 per pack" />
<androidx.appcompat.widget.AppCompatTextView
android:id="@+id/product_price_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="5dp"
android:textColor="@color/colourBlack"
android:textSize="15sp"
app:layout_constraintStart_toEndOf="@id/product_image"
app:layout_constraintTop_toBottomOf="@id/product_size_text"
app:layout_constraintBottom_toBottomOf="parent"
app:productBasketQuantity="@{product}"
tools:text="1 x £5.00" />
</androidx.constraintlayout.widget.ConstraintLayout>
</layout>
class ReviewOrderFragment : Fragment() {
private lateinit var viewModel: CheckoutSharedViewModel
private val args: ReviewOrderFragmentArgs by navArgs()
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
val binding: FragmentReviewOrderBinding = DataBindingUtil.inflate(
inflater, R.layout.fragment_review_order, container, false)
viewModel = activity?.run {
ViewModelProviders.of(this).get(CheckoutSharedViewModel::class.java)
} ?: throw Exception("Invalid Activity")
populateBasketProductsCard(inflater, binding.basketProductsCard)
binding.viewModel = viewModel
binding.lifecycleOwner = this
return binding.root
}
private fun populateBasketProductsCard(inflater: LayoutInflater, basketProductsCard: MaterialCardView) {
val productInfoView: View = inflater.inflate(R.layout.layout_review_order_product_card, null)
val basket = args.order.basket.basket
basket.forEachIndexed { index, product ->
val productsCardBinding: LayoutReviewOrderProductCardBinding = DataBindingUtil.inflate(
inflater, R.layout.layout_review_order_product_card, null, false)
productsCardBinding.product = product
basketProductsCard.addView(
productInfoView,
index,
ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT)
)
}
}
}