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added mvvm example
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‎MvvmRetrofitRecyclerviewKotlin/.gitignore‎

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*.iml
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.gradle
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/local.properties
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/.idea/caches
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/.idea/libraries
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/.idea/modules.xml
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/.idea/workspace.xml
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/.idea/navEditor.xml
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/.idea/assetWizardSettings.xml
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.DS_Store
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/build
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/captures
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.externalNativeBuild
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.cxx
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local.properties

‎MvvmRetrofitRecyclerviewKotlin/app/.gitignore‎

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/build

‎MvvmRetrofitRecyclerviewKotlin/app/build.gradle‎

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plugins {
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id 'com.android.application'
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id 'kotlin-android'
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id 'kotlin-kapt'
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}
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android {
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compileSdkVersion 30
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buildToolsVersion "30.0.2"
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defaultConfig {
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applicationId "com.velmurugan.mvvmretrofitrecyclerviewkotlin"
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minSdkVersion 24
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targetSdkVersion 30
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versionCode 1
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versionName "1.0"
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testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
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}
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buildTypes {
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release {
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minifyEnabled false
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proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
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}
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}
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compileOptions {
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sourceCompatibility JavaVersion.VERSION_1_8
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targetCompatibility JavaVersion.VERSION_1_8
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}
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kotlinOptions {
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jvmTarget = '1.8'
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}
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buildFeatures {
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viewBinding = true
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}
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}
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dependencies {
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implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
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implementation 'androidx.core:core-ktx:1.3.2'
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implementation 'androidx.appcompat:appcompat:1.2.0'
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implementation 'com.google.android.material:material:1.3.0'
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implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
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testImplementation 'junit:junit:4.+'
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androidTestImplementation 'androidx.test.ext:junit:1.1.2'
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androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
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//ViewModel and livedata
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implementation "androidx.lifecycle:lifecycle-extensions:2.2.0"
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//Retrofit
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implementation 'com.google.code.gson:gson:2.8.6'
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implementation 'com.squareup.retrofit2:retrofit:2.9.0'
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implementation 'com.squareup.retrofit2:converter-gson:2.9.0'
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//Glide
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implementation 'com.github.bumptech.glide:glide:4.12.0'
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kapt 'com.github.bumptech.glide:compiler:4.12.0'
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}

‎MvvmRetrofitRecyclerviewKotlin/app/proguard-rules.pro‎

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# Add project specific ProGuard rules here.
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# You can control the set of applied configuration files using the
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# proguardFiles setting in build.gradle.
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#
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# For more details, see
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# http://developer.android.com/guide/developing/tools/proguard.html
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# If your project uses WebView with JS, uncomment the following
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# and specify the fully qualified class name to the JavaScript interface
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# class:
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#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
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# public *;
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#}
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# Uncomment this to preserve the line number information for
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# debugging stack traces.
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#-keepattributes SourceFile,LineNumberTable
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# If you keep the line number information, uncomment this to
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# hide the original source file name.
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#-renamesourcefileattribute SourceFile

‎MvvmRetrofitRecyclerviewKotlin/app/src/androidTest/java/com/velmurugan/mvvmretrofitrecyclerviewkotlin/ExampleInstrumentedTest.kt‎

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package com.velmurugan.mvvmretrofitrecyclerviewkotlin
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import androidx.test.platform.app.InstrumentationRegistry
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import androidx.test.ext.junit.runners.AndroidJUnit4
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import org.junit.Test
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import org.junit.runner.RunWith
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import org.junit.Assert.*
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/**
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* Instrumented test, which will execute on an Android device.
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*
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* See [testing documentation](http://d.android.com/tools/testing).
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*/
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@RunWith(AndroidJUnit4::class)
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class ExampleInstrumentedTest {
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@Test
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fun useAppContext() {
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// Context of the app under test.
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val appContext = InstrumentationRegistry.getInstrumentation().targetContext
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assertEquals("com.velmurugan.mvvmretrofitrecyclerviewkotlin", appContext.packageName)
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}
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}

‎MvvmRetrofitRecyclerviewKotlin/app/src/main/AndroidManifest.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
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package="com.velmurugan.mvvmretrofitrecyclerviewkotlin">
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<uses-permission android:name="android.permission.INTERNET"/>
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<application
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android:allowBackup="true"
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android:icon="@mipmap/ic_launcher"
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android:label="@string/app_name"
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android:roundIcon="@mipmap/ic_launcher_round"
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android:supportsRtl="true"
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android:usesCleartextTraffic="true"
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android:theme="@style/Theme.MvvmRetrofitRecyclerviewKotlin">
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<activity android:name=".MainActivity">
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<intent-filter>
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<action android:name="android.intent.action.MAIN" />
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<category android:name="android.intent.category.LAUNCHER" />
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</intent-filter>
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</activity>
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</application>
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</manifest>

‎MvvmRetrofitRecyclerviewKotlin/app/src/main/java/com/velmurugan/mvvmretrofitrecyclerviewkotlin/MainActivity.kt‎

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package com.velmurugan.mvvmretrofitrecyclerviewkotlin
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import androidx.appcompat.app.AppCompatActivity
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import android.os.Bundle
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import android.util.Log
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import androidx.lifecycle.Observer
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import androidx.lifecycle.ViewModelProvider
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import androidx.lifecycle.ViewModelProviders
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import com.velmurugan.mvvmretrofitrecyclerviewkotlin.databinding.ActivityMainBinding
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class MainActivity : AppCompatActivity() {
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private val TAG = "MainActivity"
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private lateinit var binding: ActivityMainBinding
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lateinit var viewModel: MainViewModel
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private val retrofitService = RetrofitService.getInstance()
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val adapter = MainAdapter()
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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setContentView(R.layout.activity_main)
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binding = ActivityMainBinding.inflate(layoutInflater)
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setContentView(binding.root)
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viewModel = ViewModelProvider(this, MyViewModelFactory(MainRepository(retrofitService))).get(MainViewModel::class.java)
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binding.recyclerview.adapter = adapter
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viewModel.movieList.observe(this, Observer {
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Log.d(TAG, "onCreate: $it")
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adapter.setMovieList(it)
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})
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viewModel.errorMessage.observe(this, Observer {
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})
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viewModel.getAllMovies()
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}
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}

‎MvvmRetrofitRecyclerviewKotlin/app/src/main/java/com/velmurugan/mvvmretrofitrecyclerviewkotlin/MainAdapter.kt‎

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package com.velmurugan.mvvmretrofitrecyclerviewkotlin
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import android.view.LayoutInflater
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import android.view.ViewGroup
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import androidx.recyclerview.widget.RecyclerView
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import com.bumptech.glide.Glide
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import com.velmurugan.mvvmretrofitrecyclerviewkotlin.databinding.AdapterMovieBinding
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class MainAdapter: RecyclerView.Adapter<MainViewHolder>() {
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var movies = mutableListOf<Movie>()
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fun setMovieList(movies: List<Movie>) {
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this.movies = movies.toMutableList()
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notifyDataSetChanged()
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}
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override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MainViewHolder {
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val inflater = LayoutInflater.from(parent.context)
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val binding = AdapterMovieBinding.inflate(inflater, parent, false)
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return MainViewHolder(binding)
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}
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override fun onBindViewHolder(holder: MainViewHolder, position: Int) {
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val movie = movies[position]
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holder.binding.name.text = movie.name
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Glide.with(holder.itemView.context).load(movie.imageUrl).into(holder.binding.imageview)
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}
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override fun getItemCount(): Int {
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return movies.size
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}
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}
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class MainViewHolder(val binding: AdapterMovieBinding) : RecyclerView.ViewHolder(binding.root) {
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}

‎MvvmRetrofitRecyclerviewKotlin/app/src/main/java/com/velmurugan/mvvmretrofitrecyclerviewkotlin/MainRepository.kt‎

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package com.velmurugan.mvvmretrofitrecyclerviewkotlin
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import retrofit2.Response
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class MainRepository constructor(private val retrofitService: RetrofitService) {
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fun getAllMovies() = retrofitService.getAllMovies()
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}

‎MvvmRetrofitRecyclerviewKotlin/app/src/main/java/com/velmurugan/mvvmretrofitrecyclerviewkotlin/MainViewModel.kt‎

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package com.velmurugan.mvvmretrofitrecyclerviewkotlin
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import androidx.lifecycle.MutableLiveData
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import androidx.lifecycle.ViewModel
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import retrofit2.Call
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import retrofit2.Callback
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import retrofit2.Response
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class MainViewModel constructor(private val repository: MainRepository) : ViewModel() {
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val movieList = MutableLiveData<List<Movie>>()
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val errorMessage = MutableLiveData<String>()
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fun getAllMovies() {
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val response = repository.getAllMovies()
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response.enqueue(object : Callback<List<Movie>> {
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override fun onResponse(call: Call<List<Movie>>, response: Response<List<Movie>>) {
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movieList.postValue(response.body())
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}
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override fun onFailure(call: Call<List<Movie>>, t: Throwable) {
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errorMessage.postValue(t.message)
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}
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})
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}
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}

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