1. RetrofitService
object RetrofitService {
private const val URL = "https://jsonplaceholder.typicode.com/"
private val loggingInterceptor = HttpLoggingInterceptor().apply {
level = HttpLoggingInterceptor.Level.BODY
}
private val client = OkHttpClient.Builder()
.addInterceptor(loggingInterceptor)
.build()
fun getRetroService(): ApiService {
return Retrofit.Builder()
.addConverterFactory(GsonConverterFactory.create())
.baseUrl(URL)
.build().create(ApiService::class.java)
}
}2. ApiService
interface ApiService {
@GET("photos")
suspend fun getPhoto():List<PhotoResponseItem>
}3. ApiStateController
sealed class ApiStateController {
object Loading : ApiStateController()
object Empty : ApiStateController()
data class Success(val data: List<PhotoResponseItem>) : ApiStateController()
data class Failure(val msg: String) : ApiStateController()
}4. PhotoRepository
class PhotoRepository(private val apiService: ApiService) {
fun getPhoto():Flow<List<PhotoResponseItem>> = flow {
emit(apiService.getPhoto())
}.flowOn(Dispatchers.IO)
}5.PhotoViewModel
class PhotoViewModel(private val photoRepository: PhotoRepository) : ViewModel() {
private val _photo: MutableStateFlow<ApiStateController> =
MutableStateFlow(ApiStateController.Empty)
val photo: StateFlow<ApiStateController>
get() = _photo
fun getPhoto() {
viewModelScope.launch {
_photo.value = ApiStateController.Loading
photoRepository.getPhoto()
.catch { e ->
_photo.value = ApiStateController.Failure(e.message.toString())
}.collect { data ->
_photo.value = ApiStateController.Success(data)
}
}
}
}6.PhotoViewModelFactory
class PhotoViewModelFactory(private val photoRepository: PhotoRepository) :
ViewModelProvider.NewInstanceFactory() {
override fun <T : ViewModel> create(modelClass: Class<T>): T {
return PhotoViewModel(photoRepository) as T
}
}
7.PhotoActivity
class PhotoActivity : AppCompatActivity() {
private lateinit var photoViewModel: PhotoViewModel
private lateinit var binding: ActivityPhotoBinding
private lateinit var photoAdapter: PhotoAdapter
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding = DataBindingUtil.setContentView(this, R.layout.activity_photo)
initRecyclerView()
val api = RetrofitService.getRetroService()
val repository = PhotoRepository(api)
val factory = PhotoViewModelFactory(repository)
photoViewModel = ViewModelProvider(this, factory)[PhotoViewModel::class.java]
photoViewModel.getPhoto()
getPhoto()
}
private fun getPhoto() {
lifecycle.coroutineScope.launchWhenStarted {
photoViewModel.photo.collect { it ->
when (it) {
ApiStateController.Empty -> {
Log.d("Response====", "===Empty=====")
}
is ApiStateController.Failure -> {
Log.d("Response====", "===Error:= ${it.msg}=====")
binding.progress.visibility = View.GONE
Snackbar.make(binding.root, it.msg, Snackbar.LENGTH_SHORT).show()
}
ApiStateController.Loading -> {
binding.progress.visibility = View.VISIBLE
Log.d("Response====", "===Loading=====")
}
is ApiStateController.Success -> {
binding.progress.visibility = View.GONE
Log.d("Response is===", "${it.data}")
photoAdapter.setData(it.data)
photoAdapter.notifyDataSetChanged()
}
}
}
}
}
private fun initRecyclerView() {
photoAdapter = PhotoAdapter(ArrayList())
binding.recyclerView.apply {
setHasFixedSize(true)
adapter = photoAdapter
layoutManager = LinearLayoutManager(this@PhotoActivity)
}
}
}8. PhotoAdapter
class PhotoAdapter(private var photoList: List<PhotoResponseItem>) :
RecyclerView.Adapter<PhotoAdapter.PhotoViewHolder>() {
lateinit var binding: EachRowBinding
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): PhotoViewHolder {
binding = EachRowBinding.inflate(LayoutInflater.from(parent.context), parent, false)
return PhotoViewHolder(binding.root)
}
override fun onBindViewHolder(holder: PhotoViewHolder, position: Int) {
binding.id.text = photoList[position].id.toString()
binding.title.text = photoList[position].title
Glide
.with(binding.thumbnailUrl)
.load(photoList[position].thumbnailUrl)
.centerCrop()
.into(binding.thumbnailUrl);
}
override fun getItemCount(): Int {
return photoList.size
}
class PhotoViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
}
fun setData(photoData: List<PhotoResponseItem>) {
this.photoList = photoData
notifyDataSetChanged()
}
}
9. photo_activity
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android">
<data>
</data>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<ProgressBar
android:id="@+id/progress"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_marginTop="30dp"
android:visibility="gone" />
</RelativeLayout>
</layout>
10. each_row.xml
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android">
<data>
</data>
<androidx.cardview.widget.CardView 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:elevation="8dp"
android:orientation="vertical"
app:cardCornerRadius="8dp"
app:cardUseCompatPadding="true">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:id="@+id/thumbnailUrl"
android:layout_width="100dp"
android:layout_height="100dp" />
<LinearLayout
android:id="@+id/layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_toRightOf="@+id/thumbnailUrl"
android:orientation="vertical">
<TextView
android:id="@+id/title"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:maxLines="1"
android:textAppearance="@style/TextAppearance.AppCompat.Medium"
tools:text="Hello world" />
<TextView
android:id="@+id/id"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="5dp"
tools:text="1" />
</LinearLayout>
</RelativeLayout>
</androidx.cardview.widget.CardView>
</layout>
