Retrofit Sample in android

Hello friends today we are learn about how to use Retrofit lib

Create a new project and follow below steps.

build.gradle

/* Retrofit*/

final RETROFIT_VERSION = '2.3.0'

compile "com.squareup.retrofit2:retrofit:$RETROFIT_VERSION"

compile "com.squareup.retrofit2:converter-gson:$RETROFIT_VERSION"

compile "com.squareup.retrofit2:retrofit-mock:$RETROFIT_VERSION"

compile 'com.squareup.okhttp3:logging-interceptor:3.4.1'

compile 'com.android.support:recyclerview-v7:25.3.1'

compile 'com.android.support:cardview-v7:25.3.1'

MainActivity.java

package com.samset.retrofitexample;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.support.v7.widget.AppCompatButton;

import android.support.v7.widget.AppCompatEditText;

import android.support.v7.widget.LinearLayoutManager;

import android.support.v7.widget.RecyclerView;

import android.util.Log;

import android.view.View;

import android.widget.ProgressBar;

import com.samset.retrofitexample.adapter.RepositoryAdapter;

import com.samset.retrofitexample.model.Repository;

import com.samset.retrofitexample.network.ApiService;

import java.util.List;

import retrofit2.Call;

import retrofit2.Callback;

import retrofit2.Response;

public class MainActivity extends AppCompatActivity {

    private AppCompatButton btnSearch;

    private AppCompatEditText etSearch;

    private RecyclerView recyclerView;

    private ProgressBar progressBar;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        initView();

        callApi();

        // by default call

        getDatafromServer("samsetdev");

    }

    private void callApi() {

        btnSearch.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View view) {

                if (etSearch.getText().toString() != null && !etSearch.getText().toString().isEmpty()) {

                    getDatafromServer(etSearch.getText().toString());

                }

            }

        });

    }

    private void initView() {

        progressBar = (ProgressBar) findViewById(R.id.progressbar);

        recyclerView = (RecyclerView) findViewById(R.id.recyclerview);

        btnSearch = (AppCompatButton) findViewById(R.id.btnsearch);

        etSearch = (AppCompatEditText) findViewById(R.id.etrepository);

    }

    private void getDatafromServer(String username) {

        ApiService usersService = AppApplication.getInstance().getApiService();

        usersService.getRepositories(username).enqueue(new Callback<List<Repository>>() {

            @Override

            public void onResponse(Call<List<Repository>> call, Response<List<Repository>> response) {

                progressBar.setVisibility(View.GONE);

                Log.e("TAG", " Response " + response.body().size());

                setupRecyclerView(response.body());

            }

            @Override

            public void onFailure(Call<List<Repository>> call, Throwable t) {

                progressBar.setVisibility(View.GONE);

            }

        });

    }

    private void setupRecyclerView(List<Repository> repositories) {

        RepositoryAdapter adapter = new RepositoryAdapter(repositories);

        recyclerView.setAdapter(adapter);

        recyclerView.setLayoutManager(new LinearLayoutManager(this));

    }

}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>

<android.support.constraint.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="com.samset.retrofitexample.MainActivity">

    <ProgressBar

        android:id="@+id/progressbar"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        app:layout_constraintBottom_toBottomOf="parent"

        app:layout_constraintLeft_toLeftOf="parent"

        app:layout_constraintRight_toRightOf="parent"

        app:layout_constraintTop_toTopOf="parent" />

    <android.support.v7.widget.AppCompatEditText

        android:id="@+id/etrepository"

        android:layout_width="280dp"

        android:text="samsetdev"

        android:layout_height="wrap_content"

        app:layout_constraintHorizontal_bias="0.5"

        app:layout_constraintLeft_toLeftOf="parent"

        app:layout_constraintTop_toTopOf="parent" />

    <android.support.v7.widget.AppCompatButton

        android:id="@+id/btnsearch"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginRight="10dp"

        android:text="Search"

        android:textColor="@color/colorAccent"

        app:layout_constraintLeft_toRightOf="@+id/etrepository" />

    <android.support.v7.widget.RecyclerView

        android:id="@+id/recyclerview"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        app:layout_constraintTop_toBottomOf="@+id/etrepository" />

</android.support.constraint.ConstraintLayout>

Thank you 

FullSourceCode DownloadRetrofitSample