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[taler-wallet-android] 02/06: Show products included in contract terms w


From: gnunet
Subject: [taler-wallet-android] 02/06: Show products included in contract terms when paying
Date: Fri, 21 Feb 2020 19:01:51 +0100

This is an automated email from the git hooks/post-receive script.

torsten-grote pushed a commit to branch master
in repository wallet-android.

commit b2db61af90cde2c686bd75b7e8b8e69cb736a3b9
Author: Torsten Grote <address@hidden>
AuthorDate: Fri Feb 14 12:10:10 2020 -0300

    Show products included in contract terms when paying
---
 app/src/main/java/net/taler/wallet/Amount.kt       |  16 ++
 .../main/java/net/taler/wallet/WalletViewModel.kt  |   3 +-
 .../java/net/taler/wallet/payment/ContractTerms.kt |  38 ++++
 .../net/taler/wallet/payment/PaymentManager.kt     |  24 ++-
 .../net/taler/wallet/payment/ProductAdapter.kt     |  47 +++++
 .../taler/wallet/payment/PromptPaymentFragment.kt  |  21 +++
 .../main/res/layout/fragment_prompt_payment.xml    | 202 +++++++++++++--------
 app/src/main/res/layout/list_item_product.xml      |  40 ++++
 app/src/main/res/values/strings.xml                |   2 +
 9 files changed, 306 insertions(+), 87 deletions(-)

diff --git a/app/src/main/java/net/taler/wallet/Amount.kt 
b/app/src/main/java/net/taler/wallet/Amount.kt
index 2b41be1..f8b48e3 100644
--- a/app/src/main/java/net/taler/wallet/Amount.kt
+++ b/app/src/main/java/net/taler/wallet/Amount.kt
@@ -18,11 +18,16 @@
 
 package net.taler.wallet
 
+import com.fasterxml.jackson.core.JsonParser
+import com.fasterxml.jackson.databind.DeserializationContext
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize
+import com.fasterxml.jackson.databind.deser.std.StdDeserializer
 import org.json.JSONObject
 import kotlin.math.round
 
 private const val FRACTIONAL_BASE = 1e8
 
+@JsonDeserialize(using = AmountDeserializer::class)
 data class Amount(val currency: String, val amount: String) {
     fun isZero(): Boolean {
         return amount.toDouble() == 0.0
@@ -46,6 +51,17 @@ data class Amount(val currency: String, val amount: String) {
             return Amount(components[0], components[1])
         }
     }
+
+    override fun toString(): String {
+        return String.format("%.2f $currency", amount.toDouble())
+    }
+}
+
+class AmountDeserializer : StdDeserializer<Amount>(Amount::class.java) {
+    override fun deserialize(p: JsonParser, ctxt: DeserializationContext): 
Amount {
+        val node = p.codec.readValue(p, String::class.java)
+        return Amount.fromString(node)
+    }
 }
 
 class ParsedAmount(
diff --git a/app/src/main/java/net/taler/wallet/WalletViewModel.kt 
b/app/src/main/java/net/taler/wallet/WalletViewModel.kt
index af1037e..3ed271b 100644
--- a/app/src/main/java/net/taler/wallet/WalletViewModel.kt
+++ b/app/src/main/java/net/taler/wallet/WalletViewModel.kt
@@ -116,12 +116,13 @@ class WalletViewModel(val app: Application) : 
AndroidViewModel(app) {
     private var currentWithdrawRequestId = 0
 
     private val walletBackendApi = WalletBackendApi(app)
-    val paymentManager = PaymentManager(walletBackendApi)
 
     private val mapper = ObjectMapper()
         .registerModule(KotlinModule())
         .configure(FAIL_ON_UNKNOWN_PROPERTIES, false)
 
+    val paymentManager = PaymentManager(walletBackendApi, mapper)
+
     fun init() {
         if (initialized) {
             Log.e(TAG, "WalletViewModel already initialized")
diff --git a/app/src/main/java/net/taler/wallet/payment/ContractTerms.kt 
b/app/src/main/java/net/taler/wallet/payment/ContractTerms.kt
new file mode 100644
index 0000000..f577600
--- /dev/null
+++ b/app/src/main/java/net/taler/wallet/payment/ContractTerms.kt
@@ -0,0 +1,38 @@
+package net.taler.wallet.payment
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties
+import com.fasterxml.jackson.annotation.JsonProperty
+import net.taler.wallet.Amount
+
+
+@JsonIgnoreProperties(ignoreUnknown = true)
+data class ContractTerms(
+    val summary: String,
+    val products: List<ContractProduct>,
+    val amount: Amount
+)
+
+interface Product {
+    val id: String
+    val description: String
+    val price: Amount
+    val location: String?
+}
+
+@JsonIgnoreProperties("totalPrice")
+data class ContractProduct(
+    @JsonProperty("product_id")
+    override val id: String,
+    override val description: String,
+    override val price: Amount,
+    @JsonProperty("delivery_location")
+    override val location: String?,
+    val quantity: Int
+) : Product {
+
+    val totalPrice: Amount by lazy {
+        val amount = price.amount.toDouble() * quantity
+        Amount(price.currency, amount.toString())
+    }
+
+}
diff --git a/app/src/main/java/net/taler/wallet/payment/PaymentManager.kt 
b/app/src/main/java/net/taler/wallet/payment/PaymentManager.kt
index 2e40250..489940f 100644
--- a/app/src/main/java/net/taler/wallet/payment/PaymentManager.kt
+++ b/app/src/main/java/net/taler/wallet/payment/PaymentManager.kt
@@ -4,21 +4,30 @@ import android.util.Log
 import androidx.annotation.UiThread
 import androidx.lifecycle.LiveData
 import androidx.lifecycle.MutableLiveData
+import com.fasterxml.jackson.databind.ObjectMapper
+import com.fasterxml.jackson.module.kotlin.readValue
 import net.taler.wallet.Amount
 import net.taler.wallet.TAG
 import net.taler.wallet.backend.WalletBackendApi
 import org.json.JSONObject
 
-class PaymentManager(private val walletBackendApi: WalletBackendApi) {
+class PaymentManager(
+    private val walletBackendApi: WalletBackendApi,
+    private val mapper: ObjectMapper
+) {
 
     private val mPayStatus = MutableLiveData<PayStatus>(PayStatus.None)
     internal val payStatus: LiveData<PayStatus> = mPayStatus
 
+    private val mDetailsShown = MutableLiveData<Boolean>()
+    internal val detailsShown: LiveData<Boolean> = mDetailsShown
+
     private var currentPayRequestId = 0
 
     @UiThread
     fun preparePay(url: String) {
         mPayStatus.value = PayStatus.Loading
+        mDetailsShown.value = false
 
         val args = JSONObject(mapOf("url" to url))
 
@@ -55,10 +64,13 @@ class PaymentManager(private val walletBackendApi: 
WalletBackendApi) {
     }
 
     private fun getContractTerms(json: JSONObject): ContractTerms {
-        val ctJson = JSONObject(json.getString("contractTermsRaw"))
-        val amount = Amount.fromString(ctJson.getString("amount"))
-        val summary = ctJson.getString("summary")
-        return ContractTerms(summary, amount)
+        return mapper.readValue(json.getString("contractTermsRaw"))
+    }
+
+    @UiThread
+    fun toggleDetailsShown() {
+        val oldValue = mDetailsShown.value ?: false
+        mDetailsShown.value = !oldValue
     }
 
     fun confirmPay(proposalId: String) {
@@ -104,5 +116,3 @@ sealed class PayStatus {
     data class Error(val error: String) : PayStatus()
     object Success : PayStatus()
 }
-
-data class ContractTerms(val summary: String, val amount: Amount)
diff --git a/app/src/main/java/net/taler/wallet/payment/ProductAdapter.kt 
b/app/src/main/java/net/taler/wallet/payment/ProductAdapter.kt
new file mode 100644
index 0000000..f23e1cb
--- /dev/null
+++ b/app/src/main/java/net/taler/wallet/payment/ProductAdapter.kt
@@ -0,0 +1,47 @@
+package net.taler.wallet.payment
+
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.TextView
+import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.RecyclerView.ViewHolder
+import net.taler.wallet.R
+import net.taler.wallet.payment.ProductAdapter.ProductViewHolder
+
+
+internal class ProductAdapter : RecyclerView.Adapter<ProductViewHolder>() {
+
+    private val items = ArrayList<ContractProduct>()
+
+    override fun getItemCount() = items.size
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): 
ProductViewHolder {
+        val view =
+            
LayoutInflater.from(parent.context).inflate(R.layout.list_item_product, parent, 
false)
+        return ProductViewHolder(view)
+    }
+
+    override fun onBindViewHolder(holder: ProductViewHolder, position: Int) {
+        holder.bind(items[position])
+    }
+
+    fun setItems(items: List<ContractProduct>) {
+        this.items.clear()
+        this.items.addAll(items)
+        notifyDataSetChanged()
+    }
+
+    internal inner class ProductViewHolder(v: View) : ViewHolder(v) {
+        private val quantity: TextView = v.findViewById(R.id.quantity)
+        private val name: TextView = v.findViewById(R.id.name)
+        private val price: TextView = v.findViewById(R.id.price)
+
+        fun bind(product: ContractProduct) {
+            quantity.text = product.quantity.toString()
+            name.text = product.description
+            price.text = product.totalPrice.toString()
+        }
+    }
+
+}
diff --git 
a/app/src/main/java/net/taler/wallet/payment/PromptPaymentFragment.kt 
b/app/src/main/java/net/taler/wallet/payment/PromptPaymentFragment.kt
index 4b4bf01..d623788 100644
--- a/app/src/main/java/net/taler/wallet/payment/PromptPaymentFragment.kt
+++ b/app/src/main/java/net/taler/wallet/payment/PromptPaymentFragment.kt
@@ -20,13 +20,17 @@ import android.annotation.SuppressLint
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
+import android.view.View.GONE
 import android.view.View.INVISIBLE
 import android.view.View.VISIBLE
 import android.view.ViewGroup
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.activityViewModels
+import androidx.lifecycle.Observer
 import androidx.lifecycle.observe
 import androidx.navigation.fragment.findNavController
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.transition.TransitionManager.beginDelayedTransition
 import kotlinx.android.synthetic.main.fragment_prompt_payment.*
 import net.taler.wallet.Amount
 import net.taler.wallet.R
@@ -39,6 +43,7 @@ class PromptPaymentFragment : Fragment() {
 
     private val model: WalletViewModel by activityViewModels()
     private val paymentManager by lazy { model.paymentManager }
+    private val adapter = ProductAdapter()
 
     override fun onCreateView(
         inflater: LayoutInflater, container: ViewGroup?,
@@ -49,6 +54,20 @@ class PromptPaymentFragment : Fragment() {
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         paymentManager.payStatus.observe(viewLifecycleOwner, 
this::onPaymentStatusChanged)
+        paymentManager.detailsShown.observe(viewLifecycleOwner, Observer { 
shown ->
+            beginDelayedTransition(view as ViewGroup)
+            val res = if (shown) R.string.payment_hide_details else 
R.string.payment_show_details
+            detailsButton.setText(res)
+            productsList.visibility = if (shown) VISIBLE else GONE
+        })
+
+        detailsButton.setOnClickListener {
+            paymentManager.toggleDetailsShown()
+        }
+        productsList.apply {
+            adapter = this@PromptPaymentFragment.adapter
+            layoutManager = LinearLayoutManager(requireContext())
+        }
 
         button_abort_payment.setOnClickListener {
             when (val ps = paymentManager.payStatus.value) {
@@ -111,6 +130,7 @@ class PromptPaymentFragment : Fragment() {
 
     private fun showOrder(contractTerms: ContractTerms, totalFees: Amount?) {
         order_summary.text = contractTerms.summary
+        adapter.setItems(contractTerms.products)
         val amount = contractTerms.amount
         @SuppressLint("SetTextI18n")
         order_amount.text = "${amount.amount} ${amount.currency}"
@@ -123,6 +143,7 @@ class PromptPaymentFragment : Fragment() {
         }
         fadeInView(order_summary_label)
         fadeInView(order_summary)
+        if (contractTerms.products.isNotEmpty()) fadeInView(detailsButton)
         fadeInView(order_amount_label)
         fadeInView(order_amount)
     }
diff --git a/app/src/main/res/layout/fragment_prompt_payment.xml 
b/app/src/main/res/layout/fragment_prompt_payment.xml
index 8bc7b07..78d477f 100644
--- a/app/src/main/res/layout/fragment_prompt_payment.xml
+++ b/app/src/main/res/layout/fragment_prompt_payment.xml
@@ -6,92 +6,136 @@
         android:layout_height="match_parent"
         tools:context=".payment.PromptPaymentFragment">
 
-    <TextView
-            android:id="@+id/error_text"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_margin="@dimen/activity_horizontal_margin"
-            android:textColor="@android:color/holo_red_dark"
-            android:textSize="22sp"
-            android:visibility="invisible"
-            app:layout_constraintBottom_toTopOf="@+id/order_summary_label"
+    <ScrollView
+            android:layout_width="0dp"
+            android:layout_height="0dp"
+            android:layout_marginBottom="16dp"
+            android:fillViewport="true"
+            app:layout_constraintBottom_toTopOf="@+id/button_abort_payment"
             app:layout_constraintEnd_toEndOf="parent"
-            app:layout_constraintHorizontal_bias="0.5"
             app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toTopOf="parent"
-            app:layout_constraintVertical_chainStyle="packed"
-            tools:text="@string/payment_balance_insufficient"
-            tools:visibility="visible" />
+            app:layout_constraintTop_toTopOf="parent">
 
-    <TextView
-            android:id="@+id/order_summary_label"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_margin="@dimen/activity_horizontal_margin"
-            android:text="@string/payment_label_order_summary"
-            android:visibility="invisible"
-            app:layout_constraintBottom_toTopOf="@+id/order_summary"
-            app:layout_constraintEnd_toEndOf="parent"
-            app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@+id/error_text"
-            tools:visibility="visible" />
+        <androidx.constraintlayout.widget.ConstraintLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content">
 
-    <TextView
-            android:id="@+id/order_summary"
-            android:layout_width="0dp"
-            android:layout_height="wrap_content"
-            android:layout_margin="@dimen/activity_horizontal_margin"
-            android:layout_marginTop="16dp"
-            android:gravity="center_horizontal"
-            android:textAppearance="@style/TextAppearance.AppCompat.Headline"
-            android:textSize="25sp"
-            android:visibility="invisible"
-            app:layout_constraintBottom_toTopOf="@+id/order_amount_label"
-            app:layout_constraintEnd_toEndOf="parent"
-            app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@+id/order_summary_label"
-            tools:text="2 x Cappuccino, 1 x Hot Meals, 1 x Dessert"
-            tools:visibility="visible" />
+            <TextView
+                    android:id="@+id/error_text"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_margin="@dimen/activity_horizontal_margin"
+                    android:textColor="@android:color/holo_red_dark"
+                    android:textSize="22sp"
+                    android:visibility="gone"
+                    
app:layout_constraintBottom_toTopOf="@+id/order_summary_label"
+                    app:layout_constraintEnd_toEndOf="parent"
+                    app:layout_constraintStart_toStartOf="parent"
+                    app:layout_constraintTop_toTopOf="parent"
+                    app:layout_constraintVertical_chainStyle="packed"
+                    tools:text="@string/payment_balance_insufficient"
+                    tools:visibility="visible" />
 
-    <TextView
-            android:id="@+id/order_amount_label"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_margin="@dimen/activity_horizontal_margin"
-            android:text="@string/payment_label_amount"
-            android:visibility="invisible"
-            app:layout_constraintBottom_toTopOf="@+id/order_amount"
-            app:layout_constraintEnd_toEndOf="@+id/order_summary"
-            app:layout_constraintStart_toStartOf="@+id/order_summary"
-            app:layout_constraintTop_toBottomOf="@+id/order_summary"
-            tools:visibility="visible" />
+            <TextView
+                    android:id="@+id/order_summary_label"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_margin="@dimen/activity_horizontal_margin"
+                    android:text="@string/payment_label_order_summary"
+                    android:visibility="invisible"
+                    app:layout_constraintBottom_toTopOf="@+id/order_summary"
+                    app:layout_constraintEnd_toEndOf="parent"
+                    app:layout_constraintStart_toStartOf="parent"
+                    app:layout_constraintTop_toBottomOf="@+id/error_text"
+                    tools:visibility="visible" />
 
-    <TextView
-            android:id="@+id/order_amount"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_margin="@dimen/activity_horizontal_margin"
-            android:textAppearance="@style/TextAppearance.AppCompat.Headline"
-            android:visibility="invisible"
-            app:layout_constraintBottom_toTopOf="@+id/order_fees_amount"
-            app:layout_constraintEnd_toEndOf="parent"
-            app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@+id/order_amount_label"
-            tools:text="10 TESTKUDOS"
-            tools:visibility="visible" />
+            <TextView
+                    android:id="@+id/order_summary"
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_margin="@dimen/activity_horizontal_margin"
+                    android:layout_marginTop="16dp"
+                    android:gravity="center_horizontal"
+                    
android:textAppearance="@style/TextAppearance.AppCompat.Headline"
+                    android:textSize="25sp"
+                    android:visibility="invisible"
+                    app:layout_constraintBottom_toTopOf="@+id/detailsButton"
+                    app:layout_constraintEnd_toEndOf="parent"
+                    app:layout_constraintStart_toStartOf="parent"
+                    
app:layout_constraintTop_toBottomOf="@+id/order_summary_label"
+                    tools:text="2 x Cappuccino, 1 x Hot Meals, 1 x Dessert"
+                    tools:visibility="visible" />
 
-    <TextView
-            android:id="@+id/order_fees_amount"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_margin="8dp"
-            android:visibility="invisible"
-            app:layout_constraintBottom_toTopOf="@+id/button_abort_payment"
-            app:layout_constraintEnd_toEndOf="parent"
-            app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@+id/order_amount"
-            tools:text="@string/payment_fee"
-            tools:visibility="visible" />
+            <Button
+                    android:id="@+id/detailsButton"
+                    style="@style/Widget.AppCompat.Button.Colored"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:backgroundTint="@color/colorPrimary"
+                    android:text="@string/payment_show_details"
+                    android:visibility="gone"
+                    app:layout_constraintBottom_toTopOf="@+id/productsList"
+                    app:layout_constraintEnd_toEndOf="parent"
+                    app:layout_constraintStart_toStartOf="parent"
+                    app:layout_constraintTop_toBottomOf="@+id/order_summary"
+                    tools:visibility="visible" />
+
+            <androidx.recyclerview.widget.RecyclerView
+                    android:id="@+id/productsList"
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_margin="@dimen/activity_horizontal_margin"
+                    android:visibility="gone"
+                    
app:layout_constraintBottom_toTopOf="@+id/order_amount_label"
+                    app:layout_constraintEnd_toEndOf="parent"
+                    app:layout_constraintStart_toStartOf="parent"
+                    app:layout_constraintTop_toBottomOf="@+id/detailsButton"
+                    tools:listitem="@layout/list_item_product"
+                    tools:visibility="visible" />
+
+            <TextView
+                    android:id="@+id/order_amount_label"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_margin="@dimen/activity_horizontal_margin"
+                    android:text="@string/payment_label_amount"
+                    android:visibility="invisible"
+                    app:layout_constraintBottom_toTopOf="@+id/order_amount"
+                    app:layout_constraintEnd_toEndOf="parent"
+                    app:layout_constraintStart_toStartOf="parent"
+                    app:layout_constraintTop_toBottomOf="@+id/productsList"
+                    tools:visibility="visible" />
+
+            <TextView
+                    android:id="@+id/order_amount"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_margin="@dimen/activity_horizontal_margin"
+                    
android:textAppearance="@style/TextAppearance.AppCompat.Headline"
+                    android:visibility="invisible"
+                    
app:layout_constraintBottom_toTopOf="@+id/order_fees_amount"
+                    app:layout_constraintEnd_toEndOf="parent"
+                    app:layout_constraintStart_toStartOf="parent"
+                    
app:layout_constraintTop_toBottomOf="@+id/order_amount_label"
+                    tools:text="10 TESTKUDOS"
+                    tools:visibility="visible" />
+
+            <TextView
+                    android:id="@+id/order_fees_amount"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_margin="8dp"
+                    android:visibility="invisible"
+                    app:layout_constraintBottom_toBottomOf="parent"
+                    app:layout_constraintEnd_toEndOf="parent"
+                    app:layout_constraintStart_toStartOf="parent"
+                    app:layout_constraintTop_toBottomOf="@+id/order_amount"
+                    tools:text="@string/payment_fee"
+                    tools:visibility="visible" />
+
+        </androidx.constraintlayout.widget.ConstraintLayout>
+
+    </ScrollView>
 
     <Button
             android:id="@+id/button_abort_payment"
diff --git a/app/src/main/res/layout/list_item_product.xml 
b/app/src/main/res/layout/list_item_product.xml
new file mode 100644
index 0000000..88fb9e8
--- /dev/null
+++ b/app/src/main/res/layout/list_item_product.xml
@@ -0,0 +1,40 @@
+<?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="wrap_content"
+        android:paddingStart="8dp"
+        android:paddingTop="8dp"
+        android:paddingEnd="8dp">
+
+    <TextView
+            android:id="@+id/quantity"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:gravity="end"
+            android:minWidth="24dp"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            tools:text="31" />
+
+    <TextView
+            android:id="@+id/name"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="8dp"
+            android:layout_marginEnd="8dp"
+            app:layout_constraintEnd_toStartOf="@+id/price"
+            app:layout_constraintStart_toEndOf="@+id/quantity"
+            app:layout_constraintTop_toTopOf="parent"
+            tools:text="A product item that in some cases could have a very 
long name" />
+
+    <TextView
+            android:id="@+id/price"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            tools:text="23.42" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>
diff --git a/app/src/main/res/values/strings.xml 
b/app/src/main/res/values/strings.xml
index 8602063..cd1ad54 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -43,5 +43,7 @@
     <string name="payment_label_order_summary">Order Summary</string>
     <string name="payment_error">Error: %s</string>
     <string name="payment_balance_insufficient">Balance Insufficient!</string>
+    <string name="payment_show_details">Show Details</string>
+    <string name="payment_hide_details">Hide Details</string>
 
 </resources>

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