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java retrofit是什么？让我们一起来了解一下吧！
java retrofit是Java在开发时的一种轻量级http请求部分组件，它的作用是能够像接口调用这种方法来进行http调用。Retrofit在它的前期主要是应用在安卓的网络请求框架，之后也被用于java。
更确定的说，Retrofit 是一个 restful 的 http 网络请求框架的封装。
1. App应用程序通过 Retrofit 请求网络，事实上是通过应用 Retrofit 接口层封装去获得参数、Header、Url 等信息，然后由 OkHttp 完成后面的请求动作。
2. 在服务端返回数据之后，OkHttp 把原先的结果过渡给 Retrofit，Retrofit按照用户的需求对结果进行分析。所以，网络请求的本质事实上依旧是由OkHttp完成的，retrofit只是帮使用者来进行工作简便化的，比如配置网络，处理数据等工作，提高这一系列操作的复用性。
实战演练，具体步骤如下：
package request.http.com.httprequest.activity; import android.app.Activity;import android.os.Bundle;import android.support.v7.widget.DefaultItemAnimator;import android.support.v7.widget.DividerItemDecoration;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import android.util.Log;import android.widget.ImageView;import butterknife.BindView;import butterknife.ButterKnife;import butterknife.Unbinder;import okhttp3.OkHttpClient;import okhttp3.RequestBody;import okhttp3.logging.HttpLoggingInterceptor;import request.http.com.httprequest.R;import request.http.com.httprequest.adapter.RecyclerViewAdapter;import request.http.com.httprequest.api.RequestApi;import request.http.com.httprequest.bean.TokenInfoBean;import request.http.com.httprequest.bean.goodsBean;import request.http.com.httprequest.bean.goodsSuitBean;import request.http.com.httprequest.bean.singleBean;import request.http.com.httprequest.common.CommonFunc;import request.http.com.httprequest.common.Tools;import request.http.com.httprequest.common.retrofitCommon;import retrofit2.Call;import retrofit2.Callback;import retrofit2.Response; import java.util.ArrayList;import java.util.HashMap; public class MainActivity extends Activity { private Unbinder unbinder; @BindView(R.id.lv_showDetail) RecyclerView lv_showDetail; private ArrayList dataBeanList; private RecyclerViewAdapter adapter; private DefaultItemAnimator defaultItemAnimator; private RequestApi requestApi; private RequestBody body; private HashMap hashMap; private String authorizationCode; private String appKey; private singleBean singleBean; private TokenInfoBean tokenInfoBean; private ArrayList singleList; private goodsSuitBean goodsSuitBean; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); unbinder = ButterKnife.bind(this); initView(); } public void initRecyclerView(){ LinearLayoutManager manager = new LinearLayoutManager(this); lv_showDetail.setLayoutManager(manager); DividerItemDecoration dividerItemDecoration = new DividerItemDecoration(this, DividerItemDecoration.VERTICAL); dividerItemDecoration.setDrawable(getApplicationContext().getDrawable(R.drawable.rv_item_devider)); lv_showDetail.addItemDecoration(dividerItemDecoration); adapter = new RecyclerViewAdapter(MainActivity.this, dataBeanList); lv_showDetail.setAdapter(adapter); adapter.notifyDataSetChanged(); } public void initView() { retrofitCommon retrofitCommon = new retrofitCommon(); authorizationCode = CommonFunc.getBasicAuthorizationCode("user","asdasdsd"); appKey = CommonFunc.getFinplexAppKey(); requestApi= retrofitCommon.retrofitRequestPost(“访问接口的地址”); body = retrofitCommon.getRequestBody("code","1232131312"); hashMap = retrofitCommon.getRequestParam(authorizationCode,appKey); requestApi.getGroupGoods(body,hashMap).enqueue(new Callback() { @Override public void onResponse(Call call, Response response) { callSuccessResponse(response); } @Override public void onFailure(Call call, Throwable t) { callErrorResponse(t); } }); } private void callSuccessResponse( Response response){ dataBeanList = new ArrayList<>(); goodsBean goods = response.body(); goodsSuitBean = goods.getGoodsSuit(); singleList = goods.getDataList(); tokenInfoBean = goods.getTokenInfo(); for (int i=0;i< singleList.size();i++){ //处理需要显示的数据 } initRecyclerView(); } private void callErrorResponse(Throwable t){ Tools.i("error","error"+t.fillInStackTrace()); } //去掉base64前缀 public String removeBase64(String baseStr){ String base64Str = baseStr.substring(baseStr.indexOf(",")+1, baseStr.length()); return base64Str; }}
以上就是小编今天的分享了，希望可以帮助到大家。
