Merge pull request #6 from hakodeveloper/acronyms/add-presentation-layer

Acronyms feature: Add presentation layer

app/src/main/java/dev/carlos/acronyms/MainApplication.kt

@@ -1,7 +1,7 @@
 package dev.carlos.acronyms
 
 import android.app.Application
-import dev.carlos.shortform.di.acronymsModule
+import dev.carlos.shortform.di.shortformModule
 import dev.carlos.acronyms.di.appModules
 import org.koin.android.ext.koin.androidContext
 import org.koin.core.context.startKoin
@@ -26,7 +26,7 @@ class MainApplication : Application() {
             modules(
                 listOf(
                     appModules,
-                    acronymsModule
+                    shortformModule
                 )
             )
         }

app/src/main/res/navigation/main_navigation.xml

@@ -1,6 +1,10 @@
 <?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"
     android:id="@+id/main_navigation"
+    app:startDestination="@id/shortform_navigation"
     >
 
+  <include app:graph="@navigation/shortform_navigation" />
+
 </navigation>

app/src/main/res/xml/network_security_config.xml

@@ -3,4 +3,4 @@
   <domain-config cleartextTrafficPermitted="true">
     <domain includeSubdomains="true">www.nactem.ac.uk</domain>
   </domain-config>
-</network-security-config>
+</network-security-config>

core/src/main/java/dev/carlos/core/domain/network/NetworkErrors.kt

@@ -0,0 +1,10 @@
+package dev.carlos.core.domain.network
+
+import androidx.annotation.StringRes
+import dev.carlos.core.R
+
+enum class RequestError(@StringRes val message: Int) {
+    NO_NETWORK(R.string.network_error_no_network),
+    BAD_RESPONSE(R.string.network_error_bad_response),
+    UNKNOWN_PROBLEM(R.string.network_error_unknown)
+}

core/src/main/java/dev/carlos/core/domain/network/RequestState.kt

@@ -3,5 +3,6 @@ package dev.carlos.core.domain.network
 sealed class RequestState {
     class Success<out T>(val data: T) : RequestState()
     object Loading : RequestState()
-    class Error(val throwable: Throwable) : RequestState()
+    class Error(val type: RequestError) : RequestState()
+    object Empty : RequestState()
 }

core/src/main/java/dev/carlos/core/extensions/DataExtensions.kt

@@ -5,7 +5,7 @@ import androidx.lifecycle.LiveData
 import androidx.lifecycle.Observer
 
 fun <T> LiveData<T>.observeNonNull(owner: LifecycleOwner, func: (T) -> Unit) {
-    observe(owner, Observer {
+    observe(owner, {
         it?.let {
             func(it)
         }

core/src/main/java/dev/carlos/core/extensions/StringsExtensions.kt

@@ -0,0 +1,5 @@
+package dev.carlos.core.extensions
+
+import java.util.*
+
+fun String.capitalize() = replaceFirstChar { if (it.isLowerCase()) it.titlecase(Locale.getDefault()) else it.toString() }

core/src/main/java/dev/carlos/core/viewmodel/RxViewModel.kt

@@ -0,0 +1,17 @@
+package dev.carlos.core.viewmodel
+
+import androidx.lifecycle.ViewModel
+import io.reactivex.disposables.CompositeDisposable
+
+abstract class RxViewModel : ViewModel() {
+    protected val compositeDisposable by lazy { CompositeDisposable() }
+
+    override fun onCleared() {
+        super.onCleared()
+        clearCompositeDisposable()
+    }
+
+    private fun clearCompositeDisposable() {
+        compositeDisposable.clear()
+    }
+}

core/src/main/res/drawable/bg_card.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item>
+        <shape >
+            <solid android:color="@color/card_background" />
+            <corners android:radius="4dp" />
+        </shape>
+    </item>
+</layer-list>

core/src/main/res/values/colors.xml

@@ -7,4 +7,7 @@
   <color name="teal_700">#FF018786</color>
   <color name="black">#FF000000</color>
   <color name="white">#FFFFFFFF</color>
-</resources>
+  <color name="soft_background">#EEEEEE</color>
+  <color name="transparent">#00000000</color>
+  <color name="card_background">#FFFFFF</color>
+</resources>

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

@@ -1,3 +1,5 @@
 <resources>
-  <string name="app_name">core</string>
+  <string name="network_error_bad_response">Respuesta inesperada</string>
-</resources>
+  <string name="network_error_no_network">Sin conexión</string>
+  <string name="network_error_unknown">Error desconocido</string>
+</resources>

shortform/src/main/java/dev/carlos/shortform/data/AcronymsDataRepository.kt

@@ -1,16 +0,0 @@
-package dev.carlos.shortform.data
-
-import dev.carlos.shortform.data.cloud.AcronymsRemoteSource
-import dev.carlos.shortform.data.models.ShortformModel
-import dev.carlos.shortform.data.models.toShortformModel
-import dev.carlos.shortform.domain.AcronymsRepository
-import io.reactivex.Single
-
-class AcronymsDataRepository(
-    private val remoteDatasource: AcronymsRemoteSource
-) : AcronymsRepository {
-
-    override fun getAcronymDefinition(acronym: String): Single<ShortformModel> {
-        return remoteDatasource.getAcronymDefinition(acronym).map { it.single()?.toShortformModel() }
-    }
-}

shortform/src/main/java/dev/carlos/shortform/data/ShortformDataRepository.kt

@@ -0,0 +1,16 @@
+package dev.carlos.shortform.data
+
+import dev.carlos.shortform.data.cloud.ShortformRemoteSource
+import dev.carlos.shortform.data.models.ShortformModel
+import dev.carlos.shortform.data.models.toShortformModel
+import dev.carlos.shortform.domain.ShortformRepository
+import io.reactivex.Single
+
+class ShortformDataRepository(
+    private val remoteDatasource: ShortformRemoteSource
+) : ShortformRepository {
+
+    override fun getShortformDefinition(acronym: String): Single<ShortformModel> {
+        return remoteDatasource.getShortformDefinition(acronym).map { it.single().toShortformModel() }
+    }
+}

shortform/src/main/java/dev/carlos/shortform/data/cloud/ShortformRemoteSource.kt

@@ -3,6 +3,6 @@ package dev.carlos.shortform.data.cloud
 import dev.carlos.shortform.data.cloud.model.ShortformRemote
 import io.reactivex.Single
 
-interface AcronymsRemoteSource {
+interface ShortformRemoteSource {
-    fun getAcronymDefinition(acronym: String): Single<List<ShortformRemote>>
+    fun getShortformDefinition(acronym: String): Single<List<ShortformRemote>>
 }

shortform/src/main/java/dev/carlos/shortform/data/cloud/retrofit/AcronymsRemoteDatasource.kt

@@ -1,11 +0,0 @@
-package dev.carlos.shortform.data.cloud.retrofit
-
-import dev.carlos.shortform.data.cloud.AcronymsRemoteSource
-import dev.carlos.shortform.data.cloud.model.ShortformRemote
-import io.reactivex.Single
-
-class AcronymsRemoteDatasource(private val acronymsService: AcronymsService) : AcronymsRemoteSource {
-    override fun getAcronymDefinition(acronym: String): Single<List<ShortformRemote>> {
-        return acronymsService.getAcronymDefinition(acronym)
-    }
-}

shortform/src/main/java/dev/carlos/shortform/data/cloud/retrofit/ShortformRemoteDatasource.kt

@@ -0,0 +1,11 @@
+package dev.carlos.shortform.data.cloud.retrofit
+
+import dev.carlos.shortform.data.cloud.ShortformRemoteSource
+import dev.carlos.shortform.data.cloud.model.ShortformRemote
+import io.reactivex.Single
+
+class ShortformRemoteDatasource(private val shortformService: ShortformService) : ShortformRemoteSource {
+    override fun getShortformDefinition(acronym: String): Single<List<ShortformRemote>> {
+        return shortformService.getShortformDefinition(acronym)
+    }
+}

shortform/src/main/java/dev/carlos/shortform/data/cloud/retrofit/ShortformService.kt

@@ -5,7 +5,7 @@ import io.reactivex.Single
 import retrofit2.http.GET
 import retrofit2.http.Query
 
-interface AcronymsService {
+interface ShortformService {
     @GET("/software/acromine/dictionary.py")
-    fun getAcronymDefinition(@Query("sf") acronym: String): Single<List<ShortformRemote>>
+    fun getShortformDefinition(@Query("sf") acronym: String): Single<List<ShortformRemote>>
 }

shortform/src/main/java/dev/carlos/shortform/di/AcronymsModule.kt

@@ -1,25 +0,0 @@
-package dev.carlos.shortform.di
-
-import dev.carlos.core.domain.network.RemoteClient
-import dev.carlos.core.scheduler.Scheduler
-import dev.carlos.core.scheduler.SchedulerProvider
-import dev.carlos.shortform.data.AcronymsDataRepository
-import dev.carlos.shortform.data.cloud.AcronymsRemoteSource
-import dev.carlos.shortform.data.cloud.retrofit.AcronymsRemoteDatasource
-import dev.carlos.shortform.data.cloud.retrofit.AcronymsService
-import dev.carlos.shortform.domain.AcronymsRepository
-import dev.carlos.shortform.domain.GetAcronymDefinition
-import org.koin.dsl.module
-
-val acronymsModule = module {
-    single<Scheduler> { SchedulerProvider() }
-
-    single {
-        get<RemoteClient>().getClient(AcronymsService::class.java)
-    }
-
-    factory<AcronymsRemoteSource> { AcronymsRemoteDatasource(get()) }
-    factory<AcronymsRepository> { AcronymsDataRepository(get()) }
-
-    factory { GetAcronymDefinition(get(), get()) }
-}

shortform/src/main/java/dev/carlos/shortform/di/ShortformModule.kt

@@ -0,0 +1,29 @@
+package dev.carlos.shortform.di
+
+import dev.carlos.core.domain.network.RemoteClient
+import dev.carlos.core.scheduler.Scheduler
+import dev.carlos.core.scheduler.SchedulerProvider
+import dev.carlos.shortform.data.ShortformDataRepository
+import dev.carlos.shortform.data.cloud.ShortformRemoteSource
+import dev.carlos.shortform.data.cloud.retrofit.ShortformRemoteDatasource
+import dev.carlos.shortform.data.cloud.retrofit.ShortformService
+import dev.carlos.shortform.domain.ShortformRepository
+import dev.carlos.shortform.domain.GetShortformDefinition
+import dev.carlos.shortform.viewmodels.ShortformViewmodel
+import org.koin.androidx.viewmodel.dsl.viewModel
+import org.koin.dsl.module
+
+val shortformModule = module {
+    single<Scheduler> { SchedulerProvider() }
+
+    single {
+        get<RemoteClient>().getClient(ShortformService::class.java)
+    }
+
+    factory<ShortformRemoteSource> { ShortformRemoteDatasource(get()) }
+    factory<ShortformRepository> { ShortformDataRepository(get()) }
+
+    factory { GetShortformDefinition(get(), get()) }
+
+    viewModel { ShortformViewmodel(get()) }
+}

shortform/src/main/java/dev/carlos/shortform/domain/GetShortformDefinition.kt

@@ -5,11 +5,11 @@ import dev.carlos.core.extensions.runOnIo
 import dev.carlos.core.scheduler.Scheduler
 import io.reactivex.Single
 
-class GetAcronymDefinition(
+class GetShortformDefinition(
-    private val acronymsRepository: AcronymsRepository,
+    private val shortformRepository: ShortformRepository,
     private val scheduler: Scheduler
 ) {
-    fun getAcronymDefinition(acronym: String): Single<ShortformModel> {
+    fun getShortformDefinition(shortform: String): Single<ShortformModel> {
-        return acronymsRepository.getAcronymDefinition(acronym).runOnIo(scheduler)
+        return shortformRepository.getShortformDefinition(shortform).runOnIo(scheduler)
     }
 }

shortform/src/main/java/dev/carlos/shortform/domain/ShortformRepository.kt

@@ -4,6 +4,6 @@ import dev.carlos.shortform.data.models.ShortformModel
 import io.reactivex.Flowable
 import io.reactivex.Single
 
-interface AcronymsRepository {
+interface ShortformRepository {
-    fun getAcronymDefinition(acronym: String): Single<ShortformModel>
+    fun getShortformDefinition(acronym: String): Single<ShortformModel>
 }

shortform/src/main/java/dev/carlos/shortform/feature/ShortformFragment.kt

@@ -0,0 +1,90 @@
+package dev.carlos.shortform.feature
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.Toast
+import androidx.fragment.app.Fragment
+import androidx.recyclerview.widget.LinearLayoutManager
+import dev.carlos.core.domain.network.RequestError
+import dev.carlos.core.domain.network.RequestState
+import dev.carlos.core.extensions.gone
+import dev.carlos.core.extensions.observeNonNull
+import dev.carlos.core.extensions.visible
+import dev.carlos.shortform.R
+import dev.carlos.shortform.data.models.ShortformModel
+import dev.carlos.shortform.databinding.FragmentShortformDefinitionBinding
+import dev.carlos.shortform.viewmodels.ShortformViewmodel
+import dev.carlos.shortform.widgets.LongformAdapter
+import org.koin.androidx.viewmodel.ext.android.viewModel
+
+class ShortformFragment : Fragment() {
+    private val viewModel: ShortformViewmodel by viewModel()
+    private val listAdapter by lazy { LongformAdapter() }
+    private lateinit var binding: FragmentShortformDefinitionBinding
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?
+    ): View = inflater.inflate(R.layout.fragment_shortform_definition, container, false)
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        setBinding(view)
+        setRecycler()
+        setObservers()
+    }
+
+    private fun setBinding(view: View) {
+        binding = FragmentShortformDefinitionBinding.bind(view)
+    }
+
+    private fun setObservers() {
+        viewModel.acronymDefinition.observeNonNull(this) {
+            handleResult(it)
+        }
+    }
+
+    private fun handleResult(state: RequestState) {
+        when (state) {
+            is RequestState.Success<*> -> handleSuccess(state.data as ShortformModel)
+            is RequestState.Empty -> handleEmpty()
+            is RequestState.Error -> handleError(state.type)
+            is RequestState.Loading -> handleLoading()
+        }
+    }
+
+    private fun handleLoading() {
+        binding.shortformDefinitionLoading.visible()
+        binding.shortformDefinitionError.gone()
+    }
+
+    private fun handleSuccess(shortform: ShortformModel) {
+        binding.shortformDefinitionError.gone()
+        binding.shortformDefinitionLoading.gone()
+        listAdapter.addAll(shortform.results)
+    }
+
+    private fun handleEmpty() {
+        binding.shortformDefinitionErrorLabel.text = getString(R.string.shortform_definition_no_definition)
+        binding.shortformDefinitionError.visible()
+        binding.shortformDefinitionLoading.gone()
+    }
+
+    private fun handleError(error: RequestError) {
+        binding.shortformDefinitionErrorLabel.text = getString(error.message)
+        binding.shortformDefinitionError.visible()
+        binding.shortformDefinitionLoading.gone()
+    }
+
+    private fun setRecycler() {
+        binding.shortformDefinitionRecycler.apply {
+            layoutManager = LinearLayoutManager(context)
+            adapter = listAdapter.apply {
+                onItemClick = {
+                    Toast.makeText(context, it.value, Toast.LENGTH_SHORT).show()
+                }
+            }
+        }
+    }
+}

shortform/src/main/java/dev/carlos/shortform/viewmodels/ShortformViewmodel.kt

@@ -0,0 +1,37 @@
+package dev.carlos.shortform.viewmodels
+
+import androidx.lifecycle.MutableLiveData
+import dev.carlos.core.domain.network.RequestError
+import dev.carlos.core.domain.network.RequestState
+import dev.carlos.core.viewmodel.RxViewModel
+import dev.carlos.shortform.data.models.ShortformModel
+import dev.carlos.shortform.domain.GetShortformDefinition
+import retrofit2.HttpException
+import java.net.UnknownHostException
+
+class ShortformViewmodel(
+    private val getAcronymsDefinition: GetShortformDefinition
+) : RxViewModel() {
+
+    val acronymDefinition = MutableLiveData<RequestState>()
+
+    fun fetchAcronymDefinition(acronym: String) {
+        val disposable = getAcronymsDefinition.getShortformDefinition(acronym)
+            .doOnSubscribe { acronymDefinition.postValue(RequestState.Loading) }
+            .subscribe(::handleSuccess, ::handleError)
+        compositeDisposable.add(disposable)
+    }
+
+    private fun handleSuccess(definition: ShortformModel) {
+        acronymDefinition.postValue(RequestState.Success(definition))
+    }
+
+    private fun handleError(exception: Throwable) {
+        when (exception) {
+            is NoSuchElementException -> acronymDefinition.postValue(RequestState.Empty)
+            is UnknownHostException -> acronymDefinition.postValue(RequestState.Error(RequestError.NO_NETWORK))
+            is HttpException -> acronymDefinition.postValue(RequestState.Error(RequestError.BAD_RESPONSE))
+            else -> acronymDefinition.postValue(RequestState.Error(RequestError.UNKNOWN_PROBLEM))
+        }
+    }
+}

shortform/src/main/java/dev/carlos/shortform/widgets/LongformAdapter.kt

@@ -0,0 +1,60 @@
+package dev.carlos.shortform.widgets
+
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.recyclerview.widget.RecyclerView
+import dev.carlos.core.extensions.autoNotify
+import dev.carlos.core.extensions.capitalize
+import dev.carlos.shortform.R
+import dev.carlos.shortform.data.models.ShortformModel
+import dev.carlos.shortform.databinding.ItemLongformCardBinding
+import kotlin.properties.Delegates
+
+class LongformAdapter : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
+
+    private var items by Delegates.observable(emptyList<ShortformModel.LongformModel>()) { _, oldList, newList ->
+        autoNotify(oldList, newList) { old, new -> old.value == new.value }
+        notifyDataSetChanged()
+    }
+
+    var onItemClick: (ShortformModel.LongformModel) -> Unit = { }
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder =
+        LongformViewHolder(
+            LayoutInflater
+                .from(parent.context)
+                .inflate(R.layout.item_longform_card, parent, false),
+            onItemClick
+        )
+
+    fun getItem(position: Int) = items[position]
+
+    fun addAll(list: List<ShortformModel.LongformModel>) {
+        items = list
+    }
+
+    override fun getItemCount() = items.size
+
+    override fun onBindViewHolder(viewholder: RecyclerView.ViewHolder, position: Int) =
+        when (viewholder) {
+            is LongformViewHolder -> viewholder.bind(items[position])
+            else -> throw NoWhenBranchMatchedException("Undefined viewholder")
+        }
+}
+
+class LongformViewHolder(
+    private val view: View,
+    private val onItemClick: (ShortformModel.LongformModel) -> Unit
+) : RecyclerView.ViewHolder(view) {
+
+    private val binding = ItemLongformCardBinding.bind(view)
+
+    fun bind(longform: ShortformModel.LongformModel) = with(view) {
+        binding.itemLongformName.text = longform.value.capitalize()
+        binding.itemLongformSince.text = view.resources.getString(R.string.item_longform_since, longform.since)
+        binding.itemLongformContainer.setOnClickListener {
+            onItemClick(longform)
+        }
+    }
+}

shortform/src/main/res/layout/fragment_shortform_definition.xml

@@ -0,0 +1,79 @@
+<?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"
+    >
+
+  <EditText
+      android:layout_width="match_parent"
+      android:layout_height="wrap_content"
+      android:inputType="textPersonName"
+      android:hint="@string/shortform_definition_search"
+      android:textSize="18sp"
+      android:autofillHints="no"
+      android:id="@+id/shortform_definition_search_field"
+      android:layout_weight="1"
+      app:layout_constraintEnd_toEndOf="parent"
+      app:layout_constraintStart_toStartOf="parent"
+      app:layout_constraintTop_toTopOf="parent"
+      />
+
+  <androidx.recyclerview.widget.RecyclerView
+      android:id="@+id/shortform_definition_recycler"
+      android:layout_width="match_parent"
+      android:layout_height="0dp"
+      app:layout_constraintTop_toBottomOf="@id/shortform_definition_search_field"
+      app:layout_constraintStart_toStartOf="parent"
+      app:layout_constraintEnd_toEndOf="parent"
+      app:layout_constraintBottom_toBottomOf="parent"
+      />
+
+  <androidx.appcompat.widget.LinearLayoutCompat
+      android:id="@+id/shortform_definition_error"
+      android:visibility="gone"
+      android:layout_width="match_parent"
+      android:layout_height="0dp"
+      android:background="@color/white"
+      android:gravity="center"
+      app:layout_constraintTop_toBottomOf="@id/shortform_definition_search_field"
+      app:layout_constraintStart_toStartOf="parent"
+      app:layout_constraintEnd_toEndOf="parent"
+      app:layout_constraintBottom_toBottomOf="parent"
+      >
+
+    <TextView
+        android:id="@+id/shortform_definition_error_label"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:textSize="18sp"
+        tools:text="Error"
+        />
+
+  </androidx.appcompat.widget.LinearLayoutCompat>
+
+  <androidx.appcompat.widget.LinearLayoutCompat
+      android:visibility="gone"
+      android:id="@+id/shortform_definition_loading"
+      android:layout_width="match_parent"
+      android:layout_height="0dp"
+      android:background="@color/white"
+      android:gravity="center"
+      app:layout_constraintTop_toBottomOf="@id/shortform_definition_search_field"
+      app:layout_constraintStart_toStartOf="parent"
+      app:layout_constraintEnd_toEndOf="parent"
+      app:layout_constraintBottom_toBottomOf="parent"
+      >
+
+    <ProgressBar
+        android:id="@+id/shortform_definition_loading_bar"
+        android:indeterminate="true"
+        android:indeterminateBehavior="repeat"
+        android:layout_width="36dp"
+        android:layout_height="36dp"
+        />
+
+  </androidx.appcompat.widget.LinearLayoutCompat>
+
+</androidx.constraintlayout.widget.ConstraintLayout>

shortform/src/main/res/layout/item_longform_card.xml

@@ -0,0 +1,38 @@
+<?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/item_longform_container"
+    android:layout_width="match_parent"
+    android:layout_height="70dp"
+    android:layout_marginStart="8dp"
+    android:layout_marginTop="8dp"
+    android:layout_marginEnd="8dp"
+    android:background="@drawable/bg_card"
+    android:elevation="2dp"
+    android:orientation="vertical">
+
+    <TextView
+        android:id="@+id/item_longform_name"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="24dp"
+        android:layout_marginTop="12dp"
+        android:textSize="18sp"
+        android:textStyle="bold"
+        android:maxLines="1"
+        android:ellipsize="end"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        tools:text="Adenovirus receptor" />
+
+    <TextView
+        android:id="@+id/item_longform_since"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:textSize="14sp"
+        app:layout_constraintStart_toStartOf="@+id/item_longform_name"
+        app:layout_constraintTop_toBottomOf="@+id/item_longform_name"
+        tools:text="Since: 1997" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

shortform/src/main/res/navigation/shortform_navigation.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<navigation 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"
+    android:id="@+id/shortform_navigation"
+    app:startDestination="@id/shortformFragment"
+    >
+
+  <fragment
+      android:id="@+id/shortformFragment"
+      android:name="dev.carlos.shortform.feature.ShortformFragment"
+      tools:layout="@layout/fragment_shortform_definition"
+      android:label="Acronyms"
+      />
+
+</navigation>

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

@@ -1,3 +1,5 @@
 <resources>
-  <string name="app_name">acronyms</string>
+  <string name="item_longform_since">Desde %1$d</string>
+  <string name="shortform_definition_search">Buscar acrónimo</string>
+  <string name="shortform_definition_no_definition">No existe una definición</string>
 </resources>