개발 노트

배열 선언 하는 법 var intArr:Array = arrayOf(1, 2, 3, 4) var intArr2 = arrayOfNulls(5) var anyArr : Array = arrayOf(1, "awd", 3.2, 4) 반복문 쓰는 법 for(i: Int in 1..10) print("$i ") //output : 1, 2, 3, 4, 5 ... 10 val len: Int = 5 for(i in 1..len) print("$i ") //output : 1, 2, 3, 4, 5 for(i in 1 until len) print("$i ") //output : 1, 2, 3, 4 for(i: Int in 1..10 step(2)) print("$i ") //output : 1, 3, 5, 7, 9 ..

import okhttp3.OkHttpClient import okhttp3.logging.HttpLoggingInterceptor import retrofit2.Retrofit import retrofit2.converter.gson.GsonConverterFactory object RetrofitBuilder { private fun getRetrofit():Retrofit { val httpLoggingInterceptor = HttpLoggingInterceptor() httpLoggingInterceptor.level = HttpLoggingInterceptor.Level.BODY val client = OkHttpClient.Builder(). addInterceptor(httpLoggingI..

private lateinit var vm: MainViewModel vm = ViewModelProvider(this).get(MainViewModel::class.java) 원래 이렇게 써야 하는데 kotlinOptions { jvmTarget = "1.8" } implementation 'androidx.activity:activity-ktx:1.1.0' implementation 'androidx.fragment:fragment-ktx:1.2.5' 이거 하면 private val vm: MainViewModel by viewModels() 이렇게 사용 가능