Gradle dependencies updates, Api class and handling added.

app/build.gradle

@@ -1,6 +1,7 @@
 apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
 apply plugin: 'kotlin-android-extensions'
+apply plugin: 'kotlin-kapt'
 
 android {
     compileSdkVersion 29
@@ -36,4 +37,33 @@ dependencies {
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+
+    //Retrofit and GSON
+    implementation 'com.squareup.retrofit2:retrofit:2.6.0'
+    implementation 'com.squareup.retrofit2:converter-gson:2.6.0'
+
+    //Kotlin Coroutines
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:1.3.0"
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.0"
+
+    // ViewModel and LiveData
+    implementation "androidx.lifecycle:lifecycle-extensions:2.1.0"
+
+    //New Material Design
+    implementation 'com.google.android.material:material:1.1.0-alpha10'
+
+    //Kodein Dependency Injection
+    implementation "org.kodein.di:kodein-di-generic-jvm:6.2.1"
+    implementation "org.kodein.di:kodein-di-framework-android-x:6.2.1"
+
+    //Android Room
+    implementation "androidx.room:room-runtime:2.2.0-rc01"
+    implementation "androidx.room:room-ktx:2.2.0-rc01"
+    kapt "androidx.room:room-compiler:2.2.0-rc01"
+
+    implementation 'com.xwray:groupie:2.3.0'
+    implementation 'com.xwray:groupie-kotlin-android-extensions:2.3.0'
+    implementation 'com.xwray:groupie-databinding:2.3.0'
+
+    implementation "androidx.preference:preference-ktx:1.1.0"
 }

app/src/main/AndroidManifest.xml

@@ -2,6 +2,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.example.h_mal.candyspace">
 
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"

app/src/main/java/com/example/h_mal/candyspace/data/api/ApiClass.kt

@@ -1,4 +1,37 @@
 package com.example.h_mal.candyspace.data.api
 
+import okhttp3.HttpUrl
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import retrofit2.Response
+import retrofit2.Retrofit
+import retrofit2.converter.gson.GsonConverterFactory
+import retrofit2.http.GET
+import retrofit2.http.Query
+
+
 interface ApiClass {
+
+    @GET("users?")
+    suspend fun getUsersFromApi(@Query("inname") inname: String): Response<User>
+
+    companion object{
+        operator fun invoke(
+            networkConnectionInterceptor: NetworkConnectionInterceptor,
+            queryParamsInterceptor: QueryParamsInterceptor
+        ) : ApiClass{
+
+            val okkHttpclient = OkHttpClient.Builder()
+                .addNetworkInterceptor(networkConnectionInterceptor)
+                .addInterceptor(queryParamsInterceptor)
+                .build()
+
+            return Retrofit.Builder()
+                .client(okkHttpclient)
+                .baseUrl("https://api.stackexchange.com/2.2/")
+                .addConverterFactory(GsonConverterFactory.create())
+                .build()
+                .create(ApiClass::class.java)
+        }
+    }
 }

app/src/main/java/com/example/h_mal/candyspace/data/api/NetworkConnectionInterceptor.kt

@@ -0,0 +1,43 @@
+package com.example.h_mal.candyspace.data.api
+
+import android.content.Context
+import android.net.ConnectivityManager
+import android.net.NetworkCapabilities
+import okhttp3.Interceptor
+import okhttp3.Response
+import java.io.IOException
+
+/*
+*
+*
+*/
+class NetworkConnectionInterceptor(
+    context: Context
+) : Interceptor {
+
+    private val applicationContext = context.applicationContext
+
+    override fun intercept(chain: Interceptor.Chain): Response {
+        if (!isInternetAvailable()){
+            throw IOException("Make sure you have an active data connection")
+        }
+        return chain.proceed(chain.request())
+    }
+
+    private fun isInternetAvailable(): Boolean {
+        var result = false
+        val connectivityManager =
+            applicationContext.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager?
+        connectivityManager?.let {
+            it.getNetworkCapabilities(connectivityManager.activeNetwork)?.apply {
+                result = when {
+                    hasTransport(NetworkCapabilities.TRANSPORT_WIFI) -> true
+                    hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) -> true
+                    else -> false
+                }
+            }
+        }
+        return result
+    }
+
+}

app/src/main/java/com/example/h_mal/candyspace/data/api/QueryParamsInterceptor.kt

@@ -0,0 +1,29 @@
+package com.example.h_mal.candyspace.data.api
+
+import okhttp3.Interceptor
+import okhttp3.Request
+import okhttp3.Response
+
+
+class QueryParamsInterceptor : Interceptor{
+
+    override fun intercept(chain: Interceptor.Chain): Response {
+        val original = chain.request()
+        val originalHttpUrl = original.url()
+
+        val url = originalHttpUrl.newBuilder()
+            .addQueryParameter("site", "stackoverflow")
+            .addQueryParameter("pagesize","20")
+            .addQueryParameter("order","desc")
+            .addQueryParameter("sort","reputation")
+            .build()
+
+        // Request customization: add request headers
+        // Request customization: add request headers
+        val requestBuilder: Request.Builder = original.newBuilder()
+            .url(url)
+
+        val request: Request = requestBuilder.build()
+        return chain.proceed(request)
+    }
+}

app/src/main/java/com/example/h_mal/candyspace/data/api/ResponseUnwrap.kt

@@ -0,0 +1,29 @@
+package com.example.h_mal.candyspace.data.api
+
+import org.json.JSONException
+import org.json.JSONObject
+import retrofit2.Response
+import java.io.IOException
+
+abstract class ResponseUnwrap {
+
+    suspend fun<T: Any> apiRequest(call: suspend () -> Response<T>) : T{
+
+        val response = call.invoke()
+        if(response.isSuccessful){
+            return response.body()!!
+        }else{
+            val error = response.errorBody()?.string()
+
+            val message = StringBuilder()
+            error?.let{
+                try{
+                    message.append(JSONObject(it).getString("error_message"))
+                }catch(e: JSONException){ }
+                message.append("\n")
+            }
+            message.append("Error Code: ${response.code()}")
+            throw IOException(message.toString())
+        }
+    }
+}

app/src/main/java/com/example/h_mal/candyspace/data/api/User.kt

@@ -0,0 +1,38 @@
+package com.example.h_mal.candyspace.data.api
+
+import com.google.gson.annotations.Expose
+import com.google.gson.annotations.SerializedName
+
+
+class User {
+    @SerializedName("last_modified_date")
+    @Expose
+    var lastModifiedDate: Int? = null
+    @SerializedName("reputation")
+    @Expose
+    var reputation: Int? = null
+    @SerializedName("creation_date")
+    @Expose
+    var creationDate: Int? = null
+    @SerializedName("user_type")
+    @Expose
+    var userType: String? = null
+    @SerializedName("user_id")
+    @Expose
+    var userId: Int? = null
+    @SerializedName("location")
+    @Expose
+    var location: String? = null
+    @SerializedName("website_url")
+    @Expose
+    var websiteUrl: String? = null
+    @SerializedName("link")
+    @Expose
+    var link: String? = null
+    @SerializedName("profile_image")
+    @Expose
+    var profileImage: String? = null
+    @SerializedName("display_name")
+    @Expose
+    var displayName: String? = null
+}

app/src/main/java/com/example/h_mal/candyspace/data/repositories/Repository.kt

@@ -1,5 +1,14 @@
 package com.example.h_mal.candyspace.data.repositories
 
-class Repository {
+import com.example.h_mal.candyspace.data.api.ApiClass
+import com.example.h_mal.candyspace.data.api.ResponseUnwrap
+import com.example.h_mal.candyspace.data.api.User
 
+class Repository(
+    private val api: ApiClass
+): ResponseUnwrap() {
+
+    suspend fun sdasda(username: String): User {
+        return apiRequest { api.getUsersFromApi(username) }
+    }
 }

app/src/main/res/layout/main_fragment.xml

@@ -7,14 +7,24 @@
     android:layout_height="match_parent"
     tools:context=".ui.main.MainFragment">
 
-    <TextView
-        android:id="@+id/message"
-        android:layout_width="wrap_content"
+    <androidx.appcompat.widget.SearchView
+        android:id="@+id/search_bar"
+        android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:text="MainFragment"
-        app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"/>
 
+    <view class="androidx.appcompat.app.AlertController$RecycleListView"
+        android:id="@+id/recycler_view"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/search_bar"
+        tools:listitem="@android:layout/simple_list_item_2">
+
+    </view>
+
 </androidx.constraintlayout.widget.ConstraintLayout>