Retrofit구조 변경(Android 앱 권장 아키텍처)

 

 

안드로이드 앱 권장 아키텍처에 따라 지난 번에 만든 코드를 수정하였다.

 

build.gradle

implementation 'com.squareup.retrofit2:retrofit:2.9.0'
implementation 'com.squareup.retrofit2:converter-gson:2.9.0'

implementation("androidx.lifecycle:lifecycle-viewmodel-ktx:2.4.1")

implementation 'com.github.bumptech.glide:glide:4.13.0'
annotationProcessor 'com.github.bumptech.glide:compiler:4.13.0'

 

 

AndroidManifest.xml

<uses-permission android:name="android.permission.INTERNET"/>

 

 

CustomAdapter.kt

class CustomAdapter(val context :Context, val dataSet : List<Plant>) : RecyclerView.Adapter<CustomAdapter.ViewHolder>() {

    class ViewHolder(view : View) : RecyclerView.ViewHolder(view) {
        val textView : TextView = view.findViewById(R.id.textArea)
        val imageView : ImageView = view.findViewById(R.id.imageArea)
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): CustomAdapter.ViewHolder {
        val view = LayoutInflater.from(parent.context).inflate(R.layout.text_row_item, parent, false)

        return ViewHolder(view)

    }

    override fun onBindViewHolder(holder: CustomAdapter.ViewHolder, position: Int) {

        holder.textView.text = dataSet[position].name
        Glide.with(context)
            .load(dataSet[position].imageUrl)
            .into(holder.imageView)

    }

    override fun getItemCount(): Int {
        return dataSet.size
    }

}

 

 

RetrofitInstance.kt

object RetrofitInstance {

    val BASE_URL = "https://raw.githubusercontent.com/"

    val client = Retrofit
        .Builder()
        .baseUrl(BASE_URL)
        .addConverterFactory(GsonConverterFactory.create())
        .build()

    fun getInstance() : Retrofit {
        return client
    }

}

 

 

Plant.kt

data class Plant (
    val plantId : String,
    val name : String,
    val description : String,
    val growZoneNumber : Int,
    val wateringInterval : Int,
    val imageUrl : String
)

 

 

 

MainViewModel.kt

class MainViewModel : ViewModel() {

    // val retrofitInstance : MyApi = RetrofitInstance.getInstance().create(MyApi::class.java)

    private val repository = Repository()

    private val _result = MutableLiveData<List<Plant>>()
    val result : LiveData<List<Plant>>
        get() = _result

    fun getAllData() = viewModelScope.launch {
        Log.d("MainViewModel", repository.getAllData().toString())
        _result.value = repository.getAllData()
    }

}

 

MainActivity.kt

// https://raw.githubusercontent.com/googlecodelabs/kotlin-coroutines/master/advanced-coroutines-codelab/sunflower/src/main/assets/plants.json

// https://developer.android.com/training/dependency-injection/manual?hl=ko

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val viewModel = ViewModelProvider(this).get(MainViewModel::class.java)
        viewModel.getAllData()

        val rv = findViewById<RecyclerView>(R.id.rv)

        viewModel.result.observe(this, Observer {

            val customAdapter = CustomAdapter(this, it)
            rv.adapter = customAdapter
            rv.layoutManager = LinearLayoutManager(this)


        })

    }
}

 

 

MyApi.kt

interface MyApi {

    @GET("googlecodelabs/kotlin-coroutines/master/advanced-coroutines-codelab/sunflower/src/main/assets/plants.json")
    suspend fun getAllPlants() : List<Plant>

}

 

RetrofitInstance.kt

object RetrofitInstance {

    val BASE_URL = "https://raw.githubusercontent.com/"

    val client = Retrofit
        .Builder()
        .baseUrl(BASE_URL)
        .addConverterFactory(GsonConverterFactory.create())
        .build()

    fun getInstance() : Retrofit {
        return client
    }

}

 

 

Repository.kt

class Repository {

    private val client = RetrofitInstance.getInstance().create(MyApi::class.java)

    suspend fun getAllData() = client.getAllPlants()

}