API 正在获取所有 JSON 数据，但我的应用程序在回收站视图中只显示一个数据，我该怎么办？
API is fetching all the JSON data but my app displays only one in recycler view what should i do?
我正在使用食谱搜索 API 制作一个简单的食谱搜索应用程序，但问题是该应用程序从 API 获取所有数据，但我的应用程序在回收站视图中只显示一个，那么我应该怎么办做？请帮忙
MainActivity.kt
class MainActivity : AppCompatActivity() {
private lateinit var recipeViewModel: RecipeViewModel
lateinit var mainBinding: ActivityMainBinding
lateinit var recipeAdapter: RecipeAdapter
lateinit var recipeItemList: ArrayList<Recipes>
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
mainBinding = ActivityMainBinding.inflate(layoutInflater)
setContentView(mainBinding.root)
recipeViewModel =
ViewModelProvider(
this,
ViewModelProvider.AndroidViewModelFactory
.getInstance(application)
)[RecipeViewModel::class.java]
recipeItemList = arrayListOf()
mainBinding.recyclerView.layoutManager = LinearLayoutManager(this)
recipeViewModel.recipeLiveData.observe(this, Observer { recipeItems ->
recipeItemList.add(recipeItems)
recipeAdapter = RecipeAdapter(this, recipeItemList)
mainBinding.recyclerView.adapter = recipeAdapter
Log.d("RESPONSE", recipeItems.toString())
Log.d("List size", recipeAdapter.itemCount.toString())
})
searchRecipeName()
}
private fun searchRecipeName() {
mainBinding.searchRecipeFabBtn.setOnClickListener {
val view = layoutInflater.inflate(R.layout.recipe_search_layout, null)
val searchRecipeET = view.findViewById<EditText>(R.id.searchRecipeET)
val searchRecipeBtn = view.findViewById<Button>(R.id.searchRecipeBtn)
val bottomSheetDialog = BottomSheetDialog(this)
bottomSheetDialog.apply {
this.setContentView(view)
this.show()
}
searchRecipeBtn.setOnClickListener {
val recipeName = searchRecipeET.text.toString()
searchRecipeName(recipeName, searchRecipeET, bottomSheetDialog)
}
}
}
private fun searchRecipeName(
recipeName: String,
searchRecipeET: EditText,
bottomSheetDialog: BottomSheetDialog
) {
if (recipeName.isEmpty()) {
searchRecipeET.error = "Please enter recipe name"
} else {
recipeViewModel.getRecipes(recipeName)
bottomSheetDialog.dismiss()
}
}
}
RecipeAdapter.kt
class RecipeAdapter(val context: Context, val recipesList: ArrayList<Recipes> = arrayListOf()) : RecyclerView.Adapter<RecipeAdapter.RecipeViewHolder>() {
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecipeViewHolder {
val layoutInflater = LayoutInflater.from(context)
val view = layoutInflater.inflate(R.layout.recipe_items_layout, null, false)
return RecipeViewHolder(view)
}
override fun onBindViewHolder(holder: RecipeViewHolder, position: Int) {
val currentItem = recipesList[position]
holder.recipeImageView.load(currentItem.hits[3].recipe.image)
holder.recipeNameText.text = currentItem.hits[4].recipe.label
}
override fun getItemCount(): Int {
return recipesList.size
}
class RecipeViewHolder(itemView: View) :RecyclerView.ViewHolder(itemView) {
val recipeImageView: ImageView = itemView.findViewById(R.id.recipeImageView)
val recipeNameText: TextView = itemView.findViewById(R.id.recipeNameText)
}
}
RecipeViewModel.kt
class RecipeViewModel() : ViewModel() {
private val recipeRepository: RecipeRepository =
RecipeRepository(RetrofitInstance.provideApiService)
val recipeLiveData: LiveData<Recipes>
get() = recipeRepository.recipeLiveData
fun getRecipes(q:String) = viewModelScope.launch {
recipeRepository.getRecipes(q)
}
}
RecipeRepository.kt
class RecipeRepository(private val apiService: ApiService) {
private val recipeMutableLiveData: MutableLiveData<Recipes> = MutableLiveData()
val recipeLiveData: LiveData<Recipes>
get() = recipeMutableLiveData
suspend fun getRecipes(q:String){
val response = apiService.getRecipes(q)
recipeMutableLiveData.value = response.body()
}
}
APIService.kt
interface ApiService {
@GET("/api/recipes/v2?type=public&app_id=${APP_ID.appId}&app_key=${API_KEY.apiKey}")
suspend fun getRecipes(@Query("q") q:String): Response<Recipes>
}
日志
2022-03-01 17:06:00.267 14222-14222/com.yash1307.digitalrecipebook D/RESPONSE: Recipes(hits=[Hit(recipe=Recipe(calories=308.34999999999997, dietLabels=[Low-Carb, Low-Sodium], healthLabels=[Sugar-Conscious, Low Potassium, Kidney-Friendly, Keto-Friendly, Vegetarian, Pescatarian, Paleo, Mediterranean, Dairy-Free, Gluten-Free, Wheat-Free, Peanut-Free, Tree-Nut-Free, Soy-Free, Fish-Free, Shellfish-Free, Pork-Free, Red-Meat-Free, Crustacean-Free, Celery-Free, Mustard-Free, Sesame-Free, Lupine-Free, Mollusk-Free, Alcohol-Free, No oil added, Sulfite-Free, FODMAP-Free, Kosher], image=https://www.edamam.com/web-img/20f/20f0c2553240a2c6bc639d64df3f9df4.jpg, label=Poached Eggs, totalNutrients=TotalNutrients(CA=CAX(label=Calcium, quantity=120.69999999999999, unit=mg), CHOCDF=CHOCDFX(label=Carbs, quantity=1.5499999999999998, unit=g), CHOLE=CHOLEX(label=Cholesterol, quantity=799.8, unit=mg), ENERC_KCAL=ENERCKCALX(label=Energy, quantity=308.34999999999997, unit=kcal), FAT=FATX(label=Fat, quantity=20.4465, unit=g), FE=FEX(label=Iron, quantity=3.764, unit=mg), K=KX(label=Potassium, quantity=296.8, unit=mg), MG=MGX(label=Magnesium, quantity=25.849999999999998, unit=mg), NA=NAX(label=Sodium, quantity=305.40000000000003, unit=mg), PROCNT=PROCNTX(label=Protein, quantity=27.004, unit=g)))), Hit(recipe=Recipe(calories=786.91, dietLabels=[Low-Carb], healthLabels=[Sugar-Conscious, Low Potassium, Kidney-Friendly, Vegetarian, Pescatarian, Peanut-Free, Tree-Nut-Free, Soy-Free, Fish-Free, Shellfish-Free, Pork-Free, Red-Meat-Free, Crustacean-Free, Celery-Free, Mustard-Free, Sesame-Free, Lupine-Free, Mollusk-Free, Alcohol-Free, Sulfite-Free, Kosher, Immuno-Supportive], image=https://www.edamam.com/web-img/943/943f98393348d0daf5f239e328c0bb5d.jpg, label=Moonstruck eggs, totalNutrients=TotalNutrients(CA=CAX(label=Calcium, quantity=142.34, unit=mg), CHOCDF=CHOCDFX(label=Carbs, quantity=28.896199999999997, unit=g), CHOLE=CHOLEX(label=Cholesterol, quantity=472.57000000000005, unit=mg), ENERC_KCAL=ENERCKCALX(label=Energy, quantity=786.91, unit=kcal), FAT=FATX(label=Fat, quantity=67.6459, unit=g), FE=FEX(label=Iron, quantity=3.5434, unit=mg), K=KX(label=Potassium, quantity=238.37999999999997, unit=mg), MG=MGX(label=Magnesium, quantity=37.84, unit=mg), NA=NAX(label=Sodium, quantity=424.57, unit=mg), PROCNT=PROCNTX(label=Protein, quantity=17.622700000000002, unit=g)))), Hit(recipe=Recipe(calories=451.61312499999997, dietLabels=[], healthLabels=[Sugar-Conscious, Low Potassium, Kidney-Friendly, Keto-Friendly, Vegetarian, Pescatarian, Mediterranean, Dairy-Free, Peanut-Free, Tree-Nut-Free, Soy-Free, Fish-Free, Shellfish-Free, Pork-Free, Red-Meat-Free, Crustacean-Free, Celery-Free, Mustard-Free, Sesame-Free, Lupine-Free, Mollusk-Free, Alcohol-Free, Sulfite-Free, Kosher], image=https://www.edamam.com/web-img/558/558ccc3d6e43aaf065322133ad6287b0.jpg, label=Poached Eggs, totalNutrients=TotalNutrients(CA=CAX(label=Calcium, quantity=197.9872197236699, unit=mg), CHOCDF=CHOCDFX(label=Carbs, quantity=29.56533125, unit=g), CHOLE=CHOLEX(label=Cholesterol, quantity=744.0, unit=mg), ENERC_KCAL=ENERCKCALX(label=Energy, quantity=451.61312499999997, unit=kcal), FAT=FATX(label=Fat, quantity=21.014962499999996, unit=g), FE=FEX(label=Iron, quantity=5.603875052450463, unit=mg), K=KX(label=Potassium, quantity=394.53073990789, unit=mg), MG=MGX(label=Magnesium, quantity=53.41204561348624, unit=mg), NA=NAX(label=Sodium, quantity=728.8926375, unit=mg), PROCNT=PROCNTX(label=Protein, quantity=31.436606249999997, unit=g)))), Hit(recipe=Recipe(calories=2863.0874999990874, dietLabels=[Low-Carb], healthLabels=[Sugar-Conscious, Peanut-Free, Tree-Nut-Free, Soy-Free, Fish-Free, Shellfish-Free, Crustacean-Free, Celery-Free, Mustard-Free, Sesame-Free, Lupine-Free, Mollusk-Free, Alcohol-Free, Sulfite-Free], image=https://www.edamam.com/web-img/48a/48ae883aa945c01b0b8c590d40e6fd34.jpg, label=Eggs Benedict, totalNutrients=TotalNutrients(CA=CAX(label=Calcium, quantity=584.8499999983388, unit=mg), CHOCDF=CHOCDFX(label=Carbs, quantity=89.18834999989487, unit=g), CHOLE=CHOLEX(label=Cholesterol, quantity=1377.6524999998987, unit=mg), ENERC_KCAL=EN
应用图片
Here is the image that displays only one item
食谱项目布局
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto">
<com.google.android.material.card.MaterialCardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:cardCornerRadius="6dp"
app:cardElevation="6dp"
app:cardUseCompatPadding="true">
<ImageView
android:id="@+id/recipeImageView"
android:layout_width="140dp"
android:layout_height="140dp"
android:scaleType="centerCrop"
android:src="@drawable/ic_baseline_search_24" />
<TextView
android:id="@+id/recipeNameText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginStart="12dp"
android:textSize="20sp"
tools:text="Recipe Name" />
</com.google.android.material.card.MaterialCardView>
</RelativeLayout>
activity_main.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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".activities.MainActivity">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recyclerView"
android:layout_width="409dp"
android:layout_height="729dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="@+id/searchRecipeFabBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:clickable="true"
app:layout_constraintBottom_toBottomOf="@+id/recyclerView"
app:layout_constraintEnd_toEndOf="@+id/recyclerView"
app:layout_constraintHorizontal_bias="0.957"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/recyclerView"
app:layout_constraintVertical_bias="0.950"
app:srcCompat="@drawable/ic_baseline_search_24"
android:focusable="true"
android:contentDescription="@string/search_recipes" />
</androidx.constraintlayout.widget.ConstraintLayout>
Reicpes.kt（数据class）
data class Recipes(
val hits: ArrayList<Hit>,
)
Hit.kt（数据class）
data class Hit(
val recipe: Recipe
)
Recipe.kt（数据class）
data class Recipe(
val calories: Double,
val dietLabels: List<String>,
val healthLabels: List<String>,
val image: String,
val label: String,
val totalNutrients: TotalNutrients,
)
在您的适配器中，您试图获得 recipesList 尺寸，其中仅包含一项 hits
override fun getItemCount(): Int {
return recipesList.size
}
我认为您需要使用 recipesList.hits.size 而不是 recipesList.size
override fun getItemCount(): Int {
return recipesList.hits.size
}
我正在使用食谱搜索 API 制作一个简单的食谱搜索应用程序，但问题是该应用程序从 API 获取所有数据，但我的应用程序在回收站视图中只显示一个，那么我应该怎么办做？请帮忙
MainActivity.kt
class MainActivity : AppCompatActivity() {
private lateinit var recipeViewModel: RecipeViewModel
lateinit var mainBinding: ActivityMainBinding
lateinit var recipeAdapter: RecipeAdapter
lateinit var recipeItemList: ArrayList<Recipes>
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
mainBinding = ActivityMainBinding.inflate(layoutInflater)
setContentView(mainBinding.root)
recipeViewModel =
ViewModelProvider(
this,
ViewModelProvider.AndroidViewModelFactory
.getInstance(application)
)[RecipeViewModel::class.java]
recipeItemList = arrayListOf()
mainBinding.recyclerView.layoutManager = LinearLayoutManager(this)
recipeViewModel.recipeLiveData.observe(this, Observer { recipeItems ->
recipeItemList.add(recipeItems)
recipeAdapter = RecipeAdapter(this, recipeItemList)
mainBinding.recyclerView.adapter = recipeAdapter
Log.d("RESPONSE", recipeItems.toString())
Log.d("List size", recipeAdapter.itemCount.toString())
})
searchRecipeName()
}
private fun searchRecipeName() {
mainBinding.searchRecipeFabBtn.setOnClickListener {
val view = layoutInflater.inflate(R.layout.recipe_search_layout, null)
val searchRecipeET = view.findViewById<EditText>(R.id.searchRecipeET)
val searchRecipeBtn = view.findViewById<Button>(R.id.searchRecipeBtn)
val bottomSheetDialog = BottomSheetDialog(this)
bottomSheetDialog.apply {
this.setContentView(view)
this.show()
}
searchRecipeBtn.setOnClickListener {
val recipeName = searchRecipeET.text.toString()
searchRecipeName(recipeName, searchRecipeET, bottomSheetDialog)
}
}
}
private fun searchRecipeName(
recipeName: String,
searchRecipeET: EditText,
bottomSheetDialog: BottomSheetDialog
) {
if (recipeName.isEmpty()) {
searchRecipeET.error = "Please enter recipe name"
} else {
recipeViewModel.getRecipes(recipeName)
bottomSheetDialog.dismiss()
}
}
}
RecipeAdapter.kt
class RecipeAdapter(val context: Context, val recipesList: ArrayList<Recipes> = arrayListOf()) : RecyclerView.Adapter<RecipeAdapter.RecipeViewHolder>() {
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecipeViewHolder {
val layoutInflater = LayoutInflater.from(context)
val view = layoutInflater.inflate(R.layout.recipe_items_layout, null, false)
return RecipeViewHolder(view)
}
override fun onBindViewHolder(holder: RecipeViewHolder, position: Int) {
val currentItem = recipesList[position]
holder.recipeImageView.load(currentItem.hits[3].recipe.image)
holder.recipeNameText.text = currentItem.hits[4].recipe.label
}
override fun getItemCount(): Int {
return recipesList.size
}
class RecipeViewHolder(itemView: View) :RecyclerView.ViewHolder(itemView) {
val recipeImageView: ImageView = itemView.findViewById(R.id.recipeImageView)
val recipeNameText: TextView = itemView.findViewById(R.id.recipeNameText)
}
}
RecipeViewModel.kt
class RecipeViewModel() : ViewModel() {
private val recipeRepository: RecipeRepository =
RecipeRepository(RetrofitInstance.provideApiService)
val recipeLiveData: LiveData<Recipes>
get() = recipeRepository.recipeLiveData
fun getRecipes(q:String) = viewModelScope.launch {
recipeRepository.getRecipes(q)
}
}
RecipeRepository.kt
class RecipeRepository(private val apiService: ApiService) {
private val recipeMutableLiveData: MutableLiveData<Recipes> = MutableLiveData()
val recipeLiveData: LiveData<Recipes>
get() = recipeMutableLiveData
suspend fun getRecipes(q:String){
val response = apiService.getRecipes(q)
recipeMutableLiveData.value = response.body()
}
}
APIService.kt
interface ApiService {
@GET("/api/recipes/v2?type=public&app_id=${APP_ID.appId}&app_key=${API_KEY.apiKey}")
suspend fun getRecipes(@Query("q") q:String): Response<Recipes>
}
日志
2022-03-01 17:06:00.267 14222-14222/com.yash1307.digitalrecipebook D/RESPONSE: Recipes(hits=[Hit(recipe=Recipe(calories=308.34999999999997, dietLabels=[Low-Carb, Low-Sodium], healthLabels=[Sugar-Conscious, Low Potassium, Kidney-Friendly, Keto-Friendly, Vegetarian, Pescatarian, Paleo, Mediterranean, Dairy-Free, Gluten-Free, Wheat-Free, Peanut-Free, Tree-Nut-Free, Soy-Free, Fish-Free, Shellfish-Free, Pork-Free, Red-Meat-Free, Crustacean-Free, Celery-Free, Mustard-Free, Sesame-Free, Lupine-Free, Mollusk-Free, Alcohol-Free, No oil added, Sulfite-Free, FODMAP-Free, Kosher], image=https://www.edamam.com/web-img/20f/20f0c2553240a2c6bc639d64df3f9df4.jpg, label=Poached Eggs, totalNutrients=TotalNutrients(CA=CAX(label=Calcium, quantity=120.69999999999999, unit=mg), CHOCDF=CHOCDFX(label=Carbs, quantity=1.5499999999999998, unit=g), CHOLE=CHOLEX(label=Cholesterol, quantity=799.8, unit=mg), ENERC_KCAL=ENERCKCALX(label=Energy, quantity=308.34999999999997, unit=kcal), FAT=FATX(label=Fat, quantity=20.4465, unit=g), FE=FEX(label=Iron, quantity=3.764, unit=mg), K=KX(label=Potassium, quantity=296.8, unit=mg), MG=MGX(label=Magnesium, quantity=25.849999999999998, unit=mg), NA=NAX(label=Sodium, quantity=305.40000000000003, unit=mg), PROCNT=PROCNTX(label=Protein, quantity=27.004, unit=g)))), Hit(recipe=Recipe(calories=786.91, dietLabels=[Low-Carb], healthLabels=[Sugar-Conscious, Low Potassium, Kidney-Friendly, Vegetarian, Pescatarian, Peanut-Free, Tree-Nut-Free, Soy-Free, Fish-Free, Shellfish-Free, Pork-Free, Red-Meat-Free, Crustacean-Free, Celery-Free, Mustard-Free, Sesame-Free, Lupine-Free, Mollusk-Free, Alcohol-Free, Sulfite-Free, Kosher, Immuno-Supportive], image=https://www.edamam.com/web-img/943/943f98393348d0daf5f239e328c0bb5d.jpg, label=Moonstruck eggs, totalNutrients=TotalNutrients(CA=CAX(label=Calcium, quantity=142.34, unit=mg), CHOCDF=CHOCDFX(label=Carbs, quantity=28.896199999999997, unit=g), CHOLE=CHOLEX(label=Cholesterol, quantity=472.57000000000005, unit=mg), ENERC_KCAL=ENERCKCALX(label=Energy, quantity=786.91, unit=kcal), FAT=FATX(label=Fat, quantity=67.6459, unit=g), FE=FEX(label=Iron, quantity=3.5434, unit=mg), K=KX(label=Potassium, quantity=238.37999999999997, unit=mg), MG=MGX(label=Magnesium, quantity=37.84, unit=mg), NA=NAX(label=Sodium, quantity=424.57, unit=mg), PROCNT=PROCNTX(label=Protein, quantity=17.622700000000002, unit=g)))), Hit(recipe=Recipe(calories=451.61312499999997, dietLabels=[], healthLabels=[Sugar-Conscious, Low Potassium, Kidney-Friendly, Keto-Friendly, Vegetarian, Pescatarian, Mediterranean, Dairy-Free, Peanut-Free, Tree-Nut-Free, Soy-Free, Fish-Free, Shellfish-Free, Pork-Free, Red-Meat-Free, Crustacean-Free, Celery-Free, Mustard-Free, Sesame-Free, Lupine-Free, Mollusk-Free, Alcohol-Free, Sulfite-Free, Kosher], image=https://www.edamam.com/web-img/558/558ccc3d6e43aaf065322133ad6287b0.jpg, label=Poached Eggs, totalNutrients=TotalNutrients(CA=CAX(label=Calcium, quantity=197.9872197236699, unit=mg), CHOCDF=CHOCDFX(label=Carbs, quantity=29.56533125, unit=g), CHOLE=CHOLEX(label=Cholesterol, quantity=744.0, unit=mg), ENERC_KCAL=ENERCKCALX(label=Energy, quantity=451.61312499999997, unit=kcal), FAT=FATX(label=Fat, quantity=21.014962499999996, unit=g), FE=FEX(label=Iron, quantity=5.603875052450463, unit=mg), K=KX(label=Potassium, quantity=394.53073990789, unit=mg), MG=MGX(label=Magnesium, quantity=53.41204561348624, unit=mg), NA=NAX(label=Sodium, quantity=728.8926375, unit=mg), PROCNT=PROCNTX(label=Protein, quantity=31.436606249999997, unit=g)))), Hit(recipe=Recipe(calories=2863.0874999990874, dietLabels=[Low-Carb], healthLabels=[Sugar-Conscious, Peanut-Free, Tree-Nut-Free, Soy-Free, Fish-Free, Shellfish-Free, Crustacean-Free, Celery-Free, Mustard-Free, Sesame-Free, Lupine-Free, Mollusk-Free, Alcohol-Free, Sulfite-Free], image=https://www.edamam.com/web-img/48a/48ae883aa945c01b0b8c590d40e6fd34.jpg, label=Eggs Benedict, totalNutrients=TotalNutrients(CA=CAX(label=Calcium, quantity=584.8499999983388, unit=mg), CHOCDF=CHOCDFX(label=Carbs, quantity=89.18834999989487, unit=g), CHOLE=CHOLEX(label=Cholesterol, quantity=1377.6524999998987, unit=mg), ENERC_KCAL=EN
应用图片
Here is the image that displays only one item
食谱项目布局
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto">
<com.google.android.material.card.MaterialCardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:cardCornerRadius="6dp"
app:cardElevation="6dp"
app:cardUseCompatPadding="true">
<ImageView
android:id="@+id/recipeImageView"
android:layout_width="140dp"
android:layout_height="140dp"
android:scaleType="centerCrop"
android:src="@drawable/ic_baseline_search_24" />
<TextView
android:id="@+id/recipeNameText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginStart="12dp"
android:textSize="20sp"
tools:text="Recipe Name" />
</com.google.android.material.card.MaterialCardView>
</RelativeLayout>
activity_main.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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".activities.MainActivity">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recyclerView"
android:layout_width="409dp"
android:layout_height="729dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="@+id/searchRecipeFabBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:clickable="true"
app:layout_constraintBottom_toBottomOf="@+id/recyclerView"
app:layout_constraintEnd_toEndOf="@+id/recyclerView"
app:layout_constraintHorizontal_bias="0.957"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/recyclerView"
app:layout_constraintVertical_bias="0.950"
app:srcCompat="@drawable/ic_baseline_search_24"
android:focusable="true"
android:contentDescription="@string/search_recipes" />
</androidx.constraintlayout.widget.ConstraintLayout>
Reicpes.kt（数据class）
data class Recipes(
val hits: ArrayList<Hit>,
)
Hit.kt（数据class）
data class Hit(
val recipe: Recipe
)
Recipe.kt（数据class）
data class Recipe(
val calories: Double,
val dietLabels: List<String>,
val healthLabels: List<String>,
val image: String,
val label: String,
val totalNutrients: TotalNutrients,
)
在您的适配器中，您试图获得 recipesList 尺寸，其中仅包含一项 hits
override fun getItemCount(): Int {
return recipesList.size
}
我认为您需要使用 recipesList.hits.size 而不是 recipesList.size
override fun getItemCount(): Int {
return recipesList.hits.size
}