Rick & Morty Collection App

App to browse characters, episodes and search details from Rick & Morty Tv show.

Check out the app - Download app

View full details here

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Read about its MVVM architecture here.

Tech Stack & Libraries

• Kotlin Language
• MVVM Architecture
• Retrofit
• Picasso
• Epoxy RecyclerView
• Paging 3
• Moshi

API

• The Rick and Morty API

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MVVM Architecture

Start from Network Layer

1. Network Layer

4 main components are

• Service Interface
  • It defines how the app should talk to the server

interface RickAndMortyService {

    @GET(value = "character/")
    suspend fun getCharactersPage(@Query(value = "page") pageIndex: Int): Response<GetCharactersPageResponse>
}        

• Retrofit service
  • Creates an implementation of the API endpoint defined by our interface and pass that service to our API client.

object NetworkLayer {

   val moshi = Moshi.Builder()
       .add(KotlinJsonAdapterFactory())
       .build()

   private val retrofit: Retrofit = Retrofit.Builder()
       .client(getLoggingHttpClient())
       .baseUrl("https://rickandmortyapi.com/api/")
       .addConverterFactory(MoshiConverterFactory.create(moshi))
       .build()

   private val rickAndMortyService: RickAndMortyService by lazy {
       retrofit.create(RickAndMortyService::class.java)
   }

   val apiClient = ApiClient(rickAndMortyService)
}

• API Client

  • Through which our app will talk to server.
  • It has the methods to talk to API and return the response inside our Network Error handling

• Network Error handling Class SimpleResponse

  A simple kind of wrapper class

  • It have 3 constructor as a parameter - Status, reponse from API client and exception

  • It has some properties to check weather the response is successfull or failed

2. Repository Layer

We have 3 repository for fetching Character list( for home screen), Single Charater and Episodes.

class CharacterListRepository {
    suspend fun getCharactersPage(pageIndex: Int): GetCharactersPageResponse? {
        val request = NetworkLayer.apiClient.getCharactersPages(pageIndex)

        if (request.failed || !request.isSucceed) {
            return null
        }
        return request.body
    }
}

• Sending requests to API using Api client

val request = NetworkLayer.apiClient.getCharactersPages(pageIndex)

then check the request and return accordingly.

Paging 3

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ViewModel

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UI

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Epoxy UI

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Data binding

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