RetrofitOkHttp网络请求

public static final String HOST_URL="";

public interface HttpUtils {

    @GET(API.URL)
    Call<Bean<NewslistBean>> NeeslistBean();

}

　　

public interface NetWorkListener<T> {
    public void onSuccess(T t);
    public void onFailure(Exception e);
}

　　

public class RetrofitHelper {

    private static OkHttpClient okHttpClient;
    private static HttpUtils httpUtils;

    /**
     * 静态代码块
     */
    static {
        initOkHttpClient();
    }
    /**
     * 初始化OkHttpClient
     */
    private static void initOkHttpClient(){

        if(okHttpClient==null){
            synchronized (RetrofitHelper.class){
                if (okHttpClient==null){
                    //创建拦截器
                    HttpLoggingInterceptor loggingInterceptor = new HttpLoggingInterceptor();
                    loggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
                    //创建OkHttpClient
                    okHttpClient = new OkHttpClient.Builder()
                            .addInterceptor(loggingInterceptor)
                            .build();
                }
            }
        }

    }

    /**
     * 初始化一个单例
     *
     */
    public static HttpUtils getHttpUtils(){
        if(httpUtils==null){
            synchronized (HttpUtils.class){
                if(httpUtils==null){
                    httpUtils=RetrofitHelper.createAPI(HttpUtils.class,API.HOST_URL);
                }
            }
        }
     return httpUtils;
    }

    public static <T> T createAPI(Class<T> tClass,String url){

        Retrofit retrofit = new Retrofit.Builder().baseUrl(url).client(okHttpClient)
                .addConverterFactory(GsonConverterFactory.create())
                .build();
        return retrofit.create(tClass);
    }
}

　　

　

public class RetrofitHelper {

    private static OkHttpClient client;
    private static ServiceApi serviceApi;

    static {
        initOkHttp();
    }
    //初始化OkHttpClient
    private static void initOkHttp() {
        if (client == null) {
            synchronized (OkHttpClient.class) {
                if (client == null) {
                    client = new OkHttpClient.Builder().build();
                }
            }
        }
    }

    /**
     * 初始化一个单例
     * @return
     */
    public static ServiceApi getServiceApi() {
        if (serviceApi == null) {
            synchronized (ServiceApi.class) {
                if (serviceApi == null) {
                    serviceApi = RetrofitHelper.create(ServiceApi.class, UrlUtils.BASE_URL);
                }
            }
        }
        return serviceApi;
    }
    /**
     * 初始化Retrofit ,生成API方法
     *
     * @param tClass
     * @param url
     * @param <T>
     * @return
     */
    private static ServiceApi create(Class<ServiceApi> serviceApiClass, String baseUrl) {
        Retrofit re = new Retrofit.Builder()
                .baseUrl(baseUrl)
                .addConverterFactory(GsonConverterFactory.create())
                .build();
        return re.create(serviceApiClass);
    }

}

　　

public class DataPresenter {

    private IMainActivity iMainActivity;
    private IGetModel iGetModel;

    public DataPresenter(IMainActivity iMainActivity){
        this.iMainActivity = iMainActivity;
        iGetModel = new GetModel();
    }

    public void getDatas(){

        /*iGetModel.getData(new OnListiner<Bean>() {
            @Override
            public void onSuccess(Bean bean) {
                List<Bean.NewslistBean> newslist = bean.getNewslist();
                iMainActivity.onShow(newslist);
            }

            @Override
            public void onFailure(Throwable throwable) {

            }
        });*/
        iGetModel.getData(new OnListiner<Bean>() {
            @Override
            public void onSuccess(Bean bean) {
                List<Bean.NewslistBean> newslist = bean.getNewslist();
                iMainActivity.onShow(newslist);
            }

            @Override
            public void onFailure(Throwable throwable) {

            }
        });
    }

}

　　

public class GetModel implements IGetModel {
    @Override
    public void getData(final OnListiner<Bean> onListiner) {
        ServiceApi serviceApi = RetrofitHelper.getServiceApi();
        Call<Bean> data = serviceApi.getData();
        data.enqueue(new Callback<Bean>() {
            @Override
            public void onResponse(Call<Bean> call, Response<Bean> response) {
                Bean body = response.body();
                onListiner.onSuccess(body);
            }

            @Override
            public void onFailure(Call<Bean> call, Throwable t) {
                onListiner.onFailure(t);
            }
        });
    }
}

　　

public class MainActivity extends AppCompatActivity implements IMainActivity{

    private XRecyclerView mRc;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
       /* DataPresenter presenter = new DataPresenter(this);
        presenter.getDatas();*/
        DataPresenter presenter = new DataPresenter(this);
        presenter.getDatas();
        initView();
    }

    private void initView() {
        mRc = (XRecyclerView) findViewById(R.id.rc);
    }

    @Override
    public void onShow(List<Bean.NewslistBean> list) {
        MyAdapter adapter = new MyAdapter(this, list);
        mRc.setLayoutManager(new LinearLayoutManager(this));
        mRc.setAdapter(adapter);
        mRc.setLoadingListener(new XRecyclerView.LoadingListener() {
            @Override
            public void onRefresh() {
                mRc.refreshComplete();
            }

            @Override
            public void onLoadMore() {

            }
        });
    }
}

　　

item
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:fresco="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">


    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/ti"
            />
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"

            android:id="@+id/des"
            />

    </LinearLayout>

    <com.facebook.drawee.view.SimpleDraweeView
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:id="@+id/img"
        fresco:roundAsCircle="true"
        android:layout_alignParentRight="true"></com.facebook.drawee.view.SimpleDraweeView>

</RelativeLayout>

　　

　

转载于:https://www.cnblogs.com/wsq110/p/7997433.html