prakashpun

public class MainActivity extends AppCompatActivity {
    private CustomAdapter adapter;
    private RecyclerView recyclerView;
    ProgressDialog progressDoalog;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

prakashpun

public class CustomAdapter extends RecyclerView.Adapter<CustomAdapter.CustomViewHolder> {

    private List<RetroPhoto> dataList;
    private Context context;

    public CustomAdapter(Context context,List<RetroPhoto> dataList){
        this.context = context;
        this.dataList = dataList;
    }

prakashpun

public interface GetDataService {

    @GET("/photos")
    Call<List<RetroPhoto>> getAllPhotos();
}

prakashpun

public class RetrofitClientInstance {

    private static Retrofit retrofit;
    private static final String BASE_URL = "https://jsonplaceholder.typicode.com";

    public static Retrofit getRetrofitInstance() {
        if (retrofit == null) {
            retrofit = new retrofit2.Retrofit.Builder()
                    .baseUrl(BASE_URL)
                    .addConverterFactory(GsonConverterFactory.create())

prakashpun

public class RetroPhoto {

    @SerializedName("albumId")
    private Integer albumId;
    @SerializedName("id")
    private Integer id;
    @SerializedName("title")
    private String title;
    @SerializedName("url")
    private String url;

prakashpun

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.tuts.prakash.retrofittutorial">

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

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"

prakashpun

dependencies {
    ...

    compile "com.android.support:cardview-v7:26.1.0"
    compile 'com.android.support:recyclerview-v7:26.1.0'
    compile 'com.squareup.picasso:picasso:2.5.2'

    compile 'com.squareup.retrofit2:retrofit:2.3.0'
    compile 'com.squareup.retrofit2:converter-gson:2.3.0'
    compile 'com.jakewharton.picasso:picasso2-okhttp3-downloader:1.1.0'