MainActivity.kt
import android.os.Bundle
import android.widget.Button
import android.widget.TextView
import androidx.appcompat.app.AppCompatActivity
import com.example.retrofitlesson.databinding.ActivityMainBinding
import com.example.retrofitlesson.retrofit.AuthRequest
import com.example.retrofitlesson.retrofit.MainApi
import com.squareup.picasso.Picasso
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.launch
import okhttp3.OkHttpClient
import okhttp3.logging.HttpLoggingInterceptor
import retrofit2.Retrofit
import retrofit2.converter.gson.GsonConverterFactory
class MainActivity : AppCompatActivity() {
lateinit var binding: ActivityMainBinding
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding = ActivityMainBinding.inflate(layoutInflater)
setContentView(binding.root)
val interceptor = HttpLoggingInterceptor()
interceptor.level = HttpLoggingInterceptor.Level.BODY
val client = OkHttpClient.Builder()
.addInterceptor(interceptor)
.build()
val retrofit = Retrofit.Builder()
.baseUrl("https://dummyjson.com").client(client)
.addConverterFactory(GsonConverterFactory.create()).build()
val mainApi = retrofit.create(MainApi::class.java)
binding.button.setOnClickListener {
CoroutineScope(Dispatchers.IO).launch {
val user = mainApi.auth(
AuthRequest(
binding.usarename.text.toString(),
binding.password.text.toString()
)
)
runOnUiThread {
binding.apply {
Picasso.get().load(user.image).into(iv)
firstName.text = user.firstName
lastName.text = user.lastName
}
}
}
}
}
}
MainApi.kt
import retrofit2.http.Body
import retrofit2.http.GET
import retrofit2.http.POST
import retrofit2.http.Path
interface MainApi {
@GET("products/{id}")
suspend fun getProductById(@Path("id") id: Int): Product
@POST("auth/login")
suspend fun auth(@Body authRequest: AuthRequest): User
}
User.kt
data class User(
val id: Int,
val username: String,
val email: String,
val firstName: String,
val lastName: String,
val gender: String,
val image: String,
val token: String
)
AuthRequest.kt
data class AuthRequest(
val username: String,
val password: String
)
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=".MainActivity">
<TextView
android:id="@+id/firstName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:text="Hello World!"
android:textColor="#000000"
android:textSize="24sp"
android:textStyle="bold"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/iv" />
<Button
android:id="@+id/button"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:text="Sign In"
app:layout_constraintEnd_toEndOf="@+id/password"
app:layout_constraintStart_toStartOf="@+id/password"
app:layout_constraintTop_toBottomOf="@+id/password" />
<ImageView
android:id="@+id/iv"
android:layout_width="130dp"
android:layout_height="130dp"
android:layout_marginTop="152dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="@drawable/ic_launcher_foreground" />
<TextView
android:id="@+id/lastName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView"
android:textColor="#000000"
android:textSize="24sp"
android:textStyle="bold"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/firstName" />
<EditText
android:id="@+id/usarename"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:ems="10"
android:hint="Username"
android:inputType="textPersonName"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/lastName" />
<EditText
android:id="@+id/password"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:ems="10"
android:hint="Password"
android:inputType="textPassword"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/usarename" />
</androidx.constraintlayout.widget.ConstraintLayout>